./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix016_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix016_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix016_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:57:46,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:57:46,557 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:57:46,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:57:46,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:57:46,592 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:57:46,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:57:46,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:57:46,594 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:57:46,598 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:57:46,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:57:46,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:57:46,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:57:46,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:57:46,600 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:57:46,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:57:46,601 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:57:46,601 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:57:46,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:57:46,602 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:57:46,602 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:57:46,602 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:57:46,602 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:57:46,603 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:57:46,603 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:57:46,603 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:57:46,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:57:46,604 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:57:46,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:57:46,605 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:57:46,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:57:46,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:57:46,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:57:46,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:57:46,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:57:46,606 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:57:46,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:57:46,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:57:46,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:57:46,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:57:46,608 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:57:46,608 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:57:46,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:57:46,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:57:46,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:57:46,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:57:46,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:57:46,904 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:57:46,906 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:57:46,908 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_tso.opt.i [2024-06-20 15:57:48,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:57:48,305 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:57:48,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_pso.opt_tso.opt.i [2024-06-20 15:57:48,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6efcbb3a/36d106e121484d3ca3686ebc78b160e1/FLAGd4a4fb668 [2024-06-20 15:57:48,641 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6efcbb3a/36d106e121484d3ca3686ebc78b160e1 [2024-06-20 15:57:48,642 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:57:48,643 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:57:48,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016_pso.opt_tso.opt.yml/witness.yml [2024-06-20 15:57:48,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:57:48,825 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:57:48,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:57:48,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:57:48,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:57:48,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:57:48" (1/2) ... [2024-06-20 15:57:48,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215549e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:57:48, skipping insertion in model container [2024-06-20 15:57:48,833 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:57:48" (1/2) ... [2024-06-20 15:57:48,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48966c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:57:48, skipping insertion in model container [2024-06-20 15:57:48,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:48" (2/2) ... [2024-06-20 15:57:48,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215549e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:48, skipping insertion in model container [2024-06-20 15:57:48,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:48" (2/2) ... [2024-06-20 15:57:48,836 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:57:48,938 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:57:48,940 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:57:48,940 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:57:48,940 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:57:48,940 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:57:48,941 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-20 15:57:48,994 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:57:49,395 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:57:49,405 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:57:49,555 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:57:49,609 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:57:49,610 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49 WrapperNode [2024-06-20 15:57:49,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:57:49,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:57:49,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:57:49,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:57:49,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,691 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 149 [2024-06-20 15:57:49,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:57:49,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:57:49,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:57:49,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:57:49,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,735 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]. [2024-06-20 15:57:49,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:57:49,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:57:49,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:57:49,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:57:49,770 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (1/1) ... [2024-06-20 15:57:49,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:57:49,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:57:49,805 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) [2024-06-20 15:57:49,809 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 [2024-06-20 15:57:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:57:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:57:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:57:49,837 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:57:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:57:49,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:57:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:57:49,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:57:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:57:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:57:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:57:49,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:57:49,839 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:57:49,979 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:57:49,981 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:57:50,361 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:57:50,361 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:57:50,561 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:57:50,561 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:57:50,561 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:57:50 BoogieIcfgContainer [2024-06-20 15:57:50,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:57:50,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:57:50,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:57:50,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:57:50,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:57:48" (1/4) ... [2024-06-20 15:57:50,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cded7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:57:50, skipping insertion in model container [2024-06-20 15:57:50,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:48" (2/4) ... [2024-06-20 15:57:50,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cded7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:57:50, skipping insertion in model container [2024-06-20 15:57:50,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:49" (3/4) ... [2024-06-20 15:57:50,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cded7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:57:50, skipping insertion in model container [2024-06-20 15:57:50,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:57:50" (4/4) ... [2024-06-20 15:57:50,571 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_pso.opt_tso.opt.i [2024-06-20 15:57:50,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:57:50,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:57:50,588 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:57:50,643 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:57:50,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:57:50,716 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:57:50,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:57:50,719 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 67 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. [2024-06-20 15:57:50,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:57:50,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:57:50,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:57:50,744 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;@45aca3dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:57:50,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:57:50,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:57:50,750 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:57:50,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:57:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:50,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:57:50,752 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)] === [2024-06-20 15:57:50,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:50,757 INFO L85 PathProgramCache]: Analyzing trace with hash 397045706, now seen corresponding path program 1 times [2024-06-20 15:57:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:50,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064801861] [2024-06-20 15:57:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:51,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064801861] [2024-06-20 15:57:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064801861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:57:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37537040] [2024-06-20 15:57:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:57:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:57:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:57:52,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 15:57:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 15:57:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:52,384 INFO L124 PetriNetUnfolderBase]: 869/1398 cut-off events. [2024-06-20 15:57:52,385 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:57:52,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2776 conditions, 1398 events. 869/1398 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7015 event pairs, 566 based on Foata normal form. 1/1345 useless extension candidates. Maximal degree in co-relation 2764. Up to 1315 conditions per place. [2024-06-20 15:57:52,401 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:57:52,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-20 15:57:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:57:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:57:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-20 15:57:52,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:57:52,415 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 79 transitions. [2024-06-20 15:57:52,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-20 15:57:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:52,421 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:57:52,423 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} [2024-06-20 15:57:52,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:57:52,426 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:57:52,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:52,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:52,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:57:52,427 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)] === [2024-06-20 15:57:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -691136087, now seen corresponding path program 1 times [2024-06-20 15:57:52,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009775911] [2024-06-20 15:57:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:53,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:53,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009775911] [2024-06-20 15:57:53,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009775911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:53,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:53,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:57:53,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986188828] [2024-06-20 15:57:53,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:53,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:57:53,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:53,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:57:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:57:53,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 15:57:53,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:53,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:53,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 15:57:53,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:53,584 INFO L124 PetriNetUnfolderBase]: 996/1549 cut-off events. [2024-06-20 15:57:53,585 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-06-20 15:57:53,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1549 events. 996/1549 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7582 event pairs, 519 based on Foata normal form. 3/1549 useless extension candidates. Maximal degree in co-relation 3552. Up to 1484 conditions per place. [2024-06-20 15:57:53,596 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-20 15:57:53,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-20 15:57:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:57:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:57:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-20 15:57:53,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:57:53,601 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 100 transitions. [2024-06-20 15:57:53,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-20 15:57:53,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:57:53,605 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 15:57:53,605 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} [2024-06-20 15:57:53,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 15:57:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 15:57:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:53,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:53,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:53,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:57:53,608 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)] === [2024-06-20 15:57:53,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash 439035286, now seen corresponding path program 1 times [2024-06-20 15:57:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563403651] [2024-06-20 15:57:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563403651] [2024-06-20 15:57:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563403651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:54,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:54,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:57:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423668238] [2024-06-20 15:57:54,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:54,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:57:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:57:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:57:54,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 15:57:54,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 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) [2024-06-20 15:57:54,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:54,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 15:57:54,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:55,169 INFO L124 PetriNetUnfolderBase]: 1265/1933 cut-off events. [2024-06-20 15:57:55,170 INFO L125 PetriNetUnfolderBase]: For 1101/1101 co-relation queries the response was YES. [2024-06-20 15:57:55,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 1933 events. 1265/1933 cut-off events. For 1101/1101 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9175 event pairs, 445 based on Foata normal form. 6/1933 useless extension candidates. Maximal degree in co-relation 4916. Up to 1828 conditions per place. [2024-06-20 15:57:55,185 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 50 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-20 15:57:55,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 348 flow [2024-06-20 15:57:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 15:57:55,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-20 15:57:55,188 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 137 transitions. [2024-06-20 15:57:55,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 348 flow [2024-06-20 15:57:55,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 328 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:57:55,191 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-20 15:57:55,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-20 15:57:55,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-20 15:57:55,192 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-20 15:57:55,193 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) [2024-06-20 15:57:55,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:55,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:55,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:57:55,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:55,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -30884977, now seen corresponding path program 1 times [2024-06-20 15:57:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:55,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617257148] [2024-06-20 15:57:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:55,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:55,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617257148] [2024-06-20 15:57:55,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617257148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:55,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:55,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:57:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890750868] [2024-06-20 15:57:55,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:55,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:57:55,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:57:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:57:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:55,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:56,527 INFO L124 PetriNetUnfolderBase]: 1085/1742 cut-off events. [2024-06-20 15:57:56,527 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-20 15:57:56,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4799 conditions, 1742 events. 1085/1742 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8600 event pairs, 442 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 4782. Up to 1611 conditions per place. [2024-06-20 15:57:56,539 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 15:57:56,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 325 flow [2024-06-20 15:57:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:57:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:57:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 15:57:56,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 15:57:56,541 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 100 transitions. [2024-06-20 15:57:56,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 325 flow [2024-06-20 15:57:56,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:56,544 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-20 15:57:56,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 15:57:56,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 15:57:56,545 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-20 15:57:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:56,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:56,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:56,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:57:56,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:56,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash -104308520, now seen corresponding path program 1 times [2024-06-20 15:57:56,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:56,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377263265] [2024-06-20 15:57:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:56,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:57,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:57,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377263265] [2024-06-20 15:57:57,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377263265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:57,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:57,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:57:57,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096485048] [2024-06-20 15:57:57,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:57,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:57:57,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:57,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:57:57,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:57:57,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:57:57,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 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) [2024-06-20 15:57:57,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:57,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:57:57,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:58,104 INFO L124 PetriNetUnfolderBase]: 1277/1951 cut-off events. [2024-06-20 15:57:58,105 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2024-06-20 15:57:58,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5931 conditions, 1951 events. 1277/1951 cut-off events. For 3080/3080 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9180 event pairs, 487 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 5912. Up to 1826 conditions per place. [2024-06-20 15:57:58,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-20 15:57:58,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 442 flow [2024-06-20 15:57:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 15:57:58,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-20 15:57:58,123 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 122 transitions. [2024-06-20 15:57:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 442 flow [2024-06-20 15:57:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 422 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:58,129 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 258 flow [2024-06-20 15:57:58,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-20 15:57:58,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 15:57:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 258 flow [2024-06-20 15:57:58,130 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) [2024-06-20 15:57:58,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:58,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:57:58,131 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)] === [2024-06-20 15:57:58,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -76453160, now seen corresponding path program 2 times [2024-06-20 15:57:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187548573] [2024-06-20 15:57:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:58,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187548573] [2024-06-20 15:57:58,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187548573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:58,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:58,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:57:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331095417] [2024-06-20 15:57:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:57:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:57:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:57:59,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:57:59,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 258 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) [2024-06-20 15:57:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:57:59,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:59,682 INFO L124 PetriNetUnfolderBase]: 1267/1939 cut-off events. [2024-06-20 15:57:59,683 INFO L125 PetriNetUnfolderBase]: For 4431/4435 co-relation queries the response was YES. [2024-06-20 15:57:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1939 events. 1267/1939 cut-off events. For 4431/4435 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9214 event pairs, 486 based on Foata normal form. 8/1946 useless extension candidates. Maximal degree in co-relation 6351. Up to 1818 conditions per place. [2024-06-20 15:57:59,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 47 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-06-20 15:57:59,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 426 flow [2024-06-20 15:57:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 15:57:59,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 15:57:59,700 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 258 flow. Second operand 6 states and 116 transitions. [2024-06-20 15:57:59,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 426 flow [2024-06-20 15:57:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 396 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:57:59,706 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 268 flow [2024-06-20 15:57:59,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-20 15:57:59,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 15:57:59,708 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 268 flow [2024-06-20 15:57:59,708 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) [2024-06-20 15:57:59,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:59,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:59,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:57:59,709 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)] === [2024-06-20 15:57:59,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1230031002, now seen corresponding path program 1 times [2024-06-20 15:57:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:59,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863718533] [2024-06-20 15:57:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:00,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:00,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863718533] [2024-06-20 15:58:00,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863718533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:00,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:00,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113022549] [2024-06-20 15:58:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:00,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:00,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:00,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:00,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:00,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:00,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:01,270 INFO L124 PetriNetUnfolderBase]: 1325/2043 cut-off events. [2024-06-20 15:58:01,271 INFO L125 PetriNetUnfolderBase]: For 5479/5481 co-relation queries the response was YES. [2024-06-20 15:58:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2043 events. 1325/2043 cut-off events. For 5479/5481 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9760 event pairs, 520 based on Foata normal form. 6/2048 useless extension candidates. Maximal degree in co-relation 6815. Up to 1909 conditions per place. [2024-06-20 15:58:01,288 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-20 15:58:01,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 596 flow [2024-06-20 15:58:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:58:01,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 15:58:01,290 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 268 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:58:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 596 flow [2024-06-20 15:58:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 92 transitions, 540 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:01,298 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 378 flow [2024-06-20 15:58:01,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-20 15:58:01,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-20 15:58:01,299 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 378 flow [2024-06-20 15:58:01,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:01,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:01,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:01,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:58:01,299 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)] === [2024-06-20 15:58:01,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:01,300 INFO L85 PathProgramCache]: Analyzing trace with hash -980276616, now seen corresponding path program 2 times [2024-06-20 15:58:01,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:01,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783617447] [2024-06-20 15:58:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:01,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:02,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:02,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783617447] [2024-06-20 15:58:02,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783617447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:02,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:02,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46658453] [2024-06-20 15:58:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:02,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:02,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 378 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:02,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:02,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:02,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:02,973 INFO L124 PetriNetUnfolderBase]: 1347/2082 cut-off events. [2024-06-20 15:58:02,973 INFO L125 PetriNetUnfolderBase]: For 7356/7360 co-relation queries the response was YES. [2024-06-20 15:58:02,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7503 conditions, 2082 events. 1347/2082 cut-off events. For 7356/7360 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10029 event pairs, 513 based on Foata normal form. 8/2089 useless extension candidates. Maximal degree in co-relation 7479. Up to 1918 conditions per place. [2024-06-20 15:58:03,000 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-20 15:58:03,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 668 flow [2024-06-20 15:58:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:58:03,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 15:58:03,002 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 378 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:58:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 668 flow [2024-06-20 15:58:03,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 628 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:03,013 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 437 flow [2024-06-20 15:58:03,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=437, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 15:58:03,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 15:58:03,016 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 437 flow [2024-06-20 15:58:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:03,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:03,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:58:03,016 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)] === [2024-06-20 15:58:03,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1147406520, now seen corresponding path program 3 times [2024-06-20 15:58:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990019964] [2024-06-20 15:58:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:03,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:03,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:03,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990019964] [2024-06-20 15:58:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990019964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:03,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:03,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142606041] [2024-06-20 15:58:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:03,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:03,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 437 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:03,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:03,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:04,691 INFO L124 PetriNetUnfolderBase]: 1369/2124 cut-off events. [2024-06-20 15:58:04,691 INFO L125 PetriNetUnfolderBase]: For 9881/9883 co-relation queries the response was YES. [2024-06-20 15:58:04,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8165 conditions, 2124 events. 1369/2124 cut-off events. For 9881/9883 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10297 event pairs, 449 based on Foata normal form. 4/2126 useless extension candidates. Maximal degree in co-relation 8140. Up to 1834 conditions per place. [2024-06-20 15:58:04,707 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2024-06-20 15:58:04,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 805 flow [2024-06-20 15:58:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 15:58:04,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-20 15:58:04,709 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 437 flow. Second operand 7 states and 142 transitions. [2024-06-20 15:58:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 805 flow [2024-06-20 15:58:04,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 720 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:04,722 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 512 flow [2024-06-20 15:58:04,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-20 15:58:04,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-20 15:58:04,723 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 512 flow [2024-06-20 15:58:04,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:04,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:04,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:04,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:58:04,724 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)] === [2024-06-20 15:58:04,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash -114968346, now seen corresponding path program 4 times [2024-06-20 15:58:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:04,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137478804] [2024-06-20 15:58:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:05,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:05,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137478804] [2024-06-20 15:58:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137478804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:05,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:05,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095154082] [2024-06-20 15:58:05,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:05,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:05,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:05,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:05,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:05,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:05,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:05,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:06,433 INFO L124 PetriNetUnfolderBase]: 1359/2111 cut-off events. [2024-06-20 15:58:06,433 INFO L125 PetriNetUnfolderBase]: For 9995/9999 co-relation queries the response was YES. [2024-06-20 15:58:06,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8095 conditions, 2111 events. 1359/2111 cut-off events. For 9995/9999 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10258 event pairs, 456 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 8069. Up to 1826 conditions per place. [2024-06-20 15:58:06,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 37 changer transitions 0/96 dead transitions. [2024-06-20 15:58:06,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 758 flow [2024-06-20 15:58:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:58:06,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 15:58:06,450 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 512 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:58:06,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 758 flow [2024-06-20 15:58:06,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 700 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:06,464 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 536 flow [2024-06-20 15:58:06,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-20 15:58:06,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-20 15:58:06,465 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 536 flow [2024-06-20 15:58:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:58:06,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -973596612, now seen corresponding path program 1 times [2024-06-20 15:58:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40207360] [2024-06-20 15:58:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:07,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:07,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40207360] [2024-06-20 15:58:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40207360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774012204] [2024-06-20 15:58:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:07,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:07,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:07,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:07,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:07,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:08,311 INFO L124 PetriNetUnfolderBase]: 1181/1911 cut-off events. [2024-06-20 15:58:08,311 INFO L125 PetriNetUnfolderBase]: For 9708/9710 co-relation queries the response was YES. [2024-06-20 15:58:08,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7424 conditions, 1911 events. 1181/1911 cut-off events. For 9708/9710 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9579 event pairs, 396 based on Foata normal form. 4/1901 useless extension candidates. Maximal degree in co-relation 7396. Up to 1735 conditions per place. [2024-06-20 15:58:08,327 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-06-20 15:58:08,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 823 flow [2024-06-20 15:58:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 15:58:08,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 15:58:08,329 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 536 flow. Second operand 7 states and 135 transitions. [2024-06-20 15:58:08,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 823 flow [2024-06-20 15:58:08,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 720 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:08,344 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 517 flow [2024-06-20 15:58:08,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-20 15:58:08,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 15:58:08,345 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 517 flow [2024-06-20 15:58:08,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:08,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:08,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:08,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:58:08,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:08,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1756359192, now seen corresponding path program 1 times [2024-06-20 15:58:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543254634] [2024-06-20 15:58:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:09,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543254634] [2024-06-20 15:58:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543254634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:09,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:09,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:58:09,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147352039] [2024-06-20 15:58:09,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:09,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:58:09,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:09,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:58:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:58:09,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 15:58:09,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 517 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:09,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:09,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 15:58:09,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:09,644 INFO L124 PetriNetUnfolderBase]: 1070/1783 cut-off events. [2024-06-20 15:58:09,644 INFO L125 PetriNetUnfolderBase]: For 10588/10598 co-relation queries the response was YES. [2024-06-20 15:58:09,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7227 conditions, 1783 events. 1070/1783 cut-off events. For 10588/10598 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9215 event pairs, 401 based on Foata normal form. 9/1782 useless extension candidates. Maximal degree in co-relation 7197. Up to 1605 conditions per place. [2024-06-20 15:58:09,659 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-20 15:58:09,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 717 flow [2024-06-20 15:58:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:58:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:58:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-20 15:58:09,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-20 15:58:09,661 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 517 flow. Second operand 5 states and 99 transitions. [2024-06-20 15:58:09,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 717 flow [2024-06-20 15:58:09,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 678 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:09,676 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 524 flow [2024-06-20 15:58:09,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-20 15:58:09,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 15:58:09,678 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 524 flow [2024-06-20 15:58:09,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:09,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:09,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:09,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:58:09,680 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:09,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1387441020, now seen corresponding path program 1 times [2024-06-20 15:58:09,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:09,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963531296] [2024-06-20 15:58:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:09,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963531296] [2024-06-20 15:58:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963531296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:11,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439197196] [2024-06-20 15:58:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 15:58:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:11,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 15:58:11,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:11,450 INFO L124 PetriNetUnfolderBase]: 1067/1774 cut-off events. [2024-06-20 15:58:11,451 INFO L125 PetriNetUnfolderBase]: For 11988/11998 co-relation queries the response was YES. [2024-06-20 15:58:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7469 conditions, 1774 events. 1067/1774 cut-off events. For 11988/11998 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9143 event pairs, 400 based on Foata normal form. 9/1766 useless extension candidates. Maximal degree in co-relation 7438. Up to 1598 conditions per place. [2024-06-20 15:58:11,465 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 72 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-20 15:58:11,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 738 flow [2024-06-20 15:58:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 15:58:11,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-20 15:58:11,469 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 524 flow. Second operand 6 states and 115 transitions. [2024-06-20 15:58:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 738 flow [2024-06-20 15:58:11,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 94 transitions, 714 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:11,483 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 556 flow [2024-06-20 15:58:11,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=556, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-20 15:58:11,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-20 15:58:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 556 flow [2024-06-20 15:58:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:11,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:11,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:58:11,486 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)] === [2024-06-20 15:58:11,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1030818789, now seen corresponding path program 1 times [2024-06-20 15:58:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:11,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603462213] [2024-06-20 15:58:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:11,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:12,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:12,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603462213] [2024-06-20 15:58:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603462213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:12,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:12,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:12,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663629270] [2024-06-20 15:58:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:12,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:12,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:12,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:13,381 INFO L124 PetriNetUnfolderBase]: 1511/2374 cut-off events. [2024-06-20 15:58:13,382 INFO L125 PetriNetUnfolderBase]: For 19925/19929 co-relation queries the response was YES. [2024-06-20 15:58:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10616 conditions, 2374 events. 1511/2374 cut-off events. For 19925/19929 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11979 event pairs, 404 based on Foata normal form. 20/2393 useless extension candidates. Maximal degree in co-relation 10584. Up to 1876 conditions per place. [2024-06-20 15:58:13,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-20 15:58:13,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1048 flow [2024-06-20 15:58:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:58:13,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-20 15:58:13,402 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 556 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:58:13,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1048 flow [2024-06-20 15:58:13,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1014 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:13,426 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 626 flow [2024-06-20 15:58:13,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=626, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-20 15:58:13,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 15:58:13,427 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 626 flow [2024-06-20 15:58:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:13,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:58:13,428 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)] === [2024-06-20 15:58:13,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1987046843, now seen corresponding path program 2 times [2024-06-20 15:58:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785445269] [2024-06-20 15:58:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:14,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:14,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785445269] [2024-06-20 15:58:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785445269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:14,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040171090] [2024-06-20 15:58:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:14,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:14,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 626 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:14,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:14,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:14,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:15,293 INFO L124 PetriNetUnfolderBase]: 1475/2314 cut-off events. [2024-06-20 15:58:15,293 INFO L125 PetriNetUnfolderBase]: For 21418/21422 co-relation queries the response was YES. [2024-06-20 15:58:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10503 conditions, 2314 events. 1475/2314 cut-off events. For 21418/21422 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11537 event pairs, 508 based on Foata normal form. 24/2337 useless extension candidates. Maximal degree in co-relation 10470. Up to 2000 conditions per place. [2024-06-20 15:58:15,309 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-20 15:58:15,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 984 flow [2024-06-20 15:58:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:58:15,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 15:58:15,311 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 626 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:58:15,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 984 flow [2024-06-20 15:58:15,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:15,339 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 644 flow [2024-06-20 15:58:15,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-20 15:58:15,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-20 15:58:15,340 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 644 flow [2024-06-20 15:58:15,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:15,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:15,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:15,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:58:15,341 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:15,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1904006577, now seen corresponding path program 3 times [2024-06-20 15:58:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:15,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374623191] [2024-06-20 15:58:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:15,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374623191] [2024-06-20 15:58:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374623191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:16,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:16,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590276910] [2024-06-20 15:58:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:16,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:16,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:16,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:16,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:16,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:16,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:17,220 INFO L124 PetriNetUnfolderBase]: 1550/2445 cut-off events. [2024-06-20 15:58:17,220 INFO L125 PetriNetUnfolderBase]: For 24579/24581 co-relation queries the response was YES. [2024-06-20 15:58:17,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 2445 events. 1550/2445 cut-off events. For 24579/24581 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12487 event pairs, 472 based on Foata normal form. 20/2463 useless extension candidates. Maximal degree in co-relation 11208. Up to 2030 conditions per place. [2024-06-20 15:58:17,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 40 changer transitions 0/121 dead transitions. [2024-06-20 15:58:17,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 1010 flow [2024-06-20 15:58:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 15:58:17,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 15:58:17,241 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 644 flow. Second operand 8 states and 160 transitions. [2024-06-20 15:58:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 1010 flow [2024-06-20 15:58:17,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 949 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:17,268 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 692 flow [2024-06-20 15:58:17,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=692, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-20 15:58:17,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-20 15:58:17,269 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 692 flow [2024-06-20 15:58:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:17,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:17,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:17,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:58:17,271 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)] === [2024-06-20 15:58:17,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2102522711, now seen corresponding path program 1 times [2024-06-20 15:58:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108462773] [2024-06-20 15:58:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108462773] [2024-06-20 15:58:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108462773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:18,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482195918] [2024-06-20 15:58:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:18,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:18,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:18,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 692 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:18,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:18,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:18,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:19,263 INFO L124 PetriNetUnfolderBase]: 1567/2464 cut-off events. [2024-06-20 15:58:19,263 INFO L125 PetriNetUnfolderBase]: For 26360/26364 co-relation queries the response was YES. [2024-06-20 15:58:19,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11599 conditions, 2464 events. 1567/2464 cut-off events. For 26360/26364 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12538 event pairs, 478 based on Foata normal form. 8/2470 useless extension candidates. Maximal degree in co-relation 11563. Up to 2277 conditions per place. [2024-06-20 15:58:19,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 91 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2024-06-20 15:58:19,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1067 flow [2024-06-20 15:58:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 15:58:19,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 15:58:19,276 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 692 flow. Second operand 8 states and 153 transitions. [2024-06-20 15:58:19,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1067 flow [2024-06-20 15:58:19,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 978 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:19,299 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 720 flow [2024-06-20 15:58:19,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-20 15:58:19,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 15:58:19,300 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 720 flow [2024-06-20 15:58:19,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:19,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:19,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:19,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:58:19,301 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:19,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 49558087, now seen corresponding path program 1 times [2024-06-20 15:58:19,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:19,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099007672] [2024-06-20 15:58:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:19,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:20,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099007672] [2024-06-20 15:58:20,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099007672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:20,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:20,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141915634] [2024-06-20 15:58:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:20,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:20,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:20,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:20,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:20,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:20,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:20,587 INFO L124 PetriNetUnfolderBase]: 1462/2367 cut-off events. [2024-06-20 15:58:20,588 INFO L125 PetriNetUnfolderBase]: For 28622/28632 co-relation queries the response was YES. [2024-06-20 15:58:20,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11453 conditions, 2367 events. 1462/2367 cut-off events. For 28622/28632 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12553 event pairs, 495 based on Foata normal form. 10/2358 useless extension candidates. Maximal degree in co-relation 11415. Up to 2159 conditions per place. [2024-06-20 15:58:20,600 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 77 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2024-06-20 15:58:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 110 transitions, 982 flow [2024-06-20 15:58:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 15:58:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 15:58:20,602 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 720 flow. Second operand 6 states and 116 transitions. [2024-06-20 15:58:20,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 110 transitions, 982 flow [2024-06-20 15:58:20,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 911 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:20,631 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 731 flow [2024-06-20 15:58:20,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=731, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-20 15:58:20,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 15:58:20,632 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 731 flow [2024-06-20 15:58:20,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:20,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:20,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:58:20,632 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)] === [2024-06-20 15:58:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2137594305, now seen corresponding path program 4 times [2024-06-20 15:58:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:20,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300082696] [2024-06-20 15:58:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300082696] [2024-06-20 15:58:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300082696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:21,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099791168] [2024-06-20 15:58:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:21,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:21,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 731 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:21,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:21,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:21,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:22,276 INFO L124 PetriNetUnfolderBase]: 1602/2536 cut-off events. [2024-06-20 15:58:22,277 INFO L125 PetriNetUnfolderBase]: For 33394/33398 co-relation queries the response was YES. [2024-06-20 15:58:22,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12471 conditions, 2536 events. 1602/2536 cut-off events. For 33394/33398 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13057 event pairs, 468 based on Foata normal form. 20/2554 useless extension candidates. Maximal degree in co-relation 12432. Up to 2118 conditions per place. [2024-06-20 15:58:22,287 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 41 changer transitions 0/128 dead transitions. [2024-06-20 15:58:22,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1119 flow [2024-06-20 15:58:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:58:22,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 15:58:22,290 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 731 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:58:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1119 flow [2024-06-20 15:58:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1067 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:22,317 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 794 flow [2024-06-20 15:58:22,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=794, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-20 15:58:22,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 15:58:22,317 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 794 flow [2024-06-20 15:58:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:22,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:22,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:22,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:58:22,318 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)] === [2024-06-20 15:58:22,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 440088957, now seen corresponding path program 2 times [2024-06-20 15:58:22,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:22,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548473706] [2024-06-20 15:58:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:22,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548473706] [2024-06-20 15:58:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548473706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113576649] [2024-06-20 15:58:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:23,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 794 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:24,372 INFO L124 PetriNetUnfolderBase]: 1630/2592 cut-off events. [2024-06-20 15:58:24,372 INFO L125 PetriNetUnfolderBase]: For 35228/35236 co-relation queries the response was YES. [2024-06-20 15:58:24,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13008 conditions, 2592 events. 1630/2592 cut-off events. For 35228/35236 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13482 event pairs, 487 based on Foata normal form. 12/2603 useless extension candidates. Maximal degree in co-relation 12968. Up to 2377 conditions per place. [2024-06-20 15:58:24,385 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-20 15:58:24,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1189 flow [2024-06-20 15:58:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:58:24,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 15:58:24,387 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 794 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:58:24,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1189 flow [2024-06-20 15:58:24,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1092 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:24,449 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 837 flow [2024-06-20 15:58:24,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-20 15:58:24,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-20 15:58:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 837 flow [2024-06-20 15:58:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:24,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:24,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:58:24,451 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)] === [2024-06-20 15:58:24,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 667990107, now seen corresponding path program 3 times [2024-06-20 15:58:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:24,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747807633] [2024-06-20 15:58:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747807633] [2024-06-20 15:58:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747807633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:25,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446204502] [2024-06-20 15:58:25,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:25,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:25,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:25,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:25,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:26,295 INFO L124 PetriNetUnfolderBase]: 1647/2619 cut-off events. [2024-06-20 15:58:26,295 INFO L125 PetriNetUnfolderBase]: For 38184/38192 co-relation queries the response was YES. [2024-06-20 15:58:26,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13434 conditions, 2619 events. 1647/2619 cut-off events. For 38184/38192 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13656 event pairs, 492 based on Foata normal form. 12/2630 useless extension candidates. Maximal degree in co-relation 13392. Up to 2404 conditions per place. [2024-06-20 15:58:26,308 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-20 15:58:26,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1232 flow [2024-06-20 15:58:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:58:26,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 15:58:26,310 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 837 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:58:26,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1232 flow [2024-06-20 15:58:26,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 1143 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:26,341 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 878 flow [2024-06-20 15:58:26,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2024-06-20 15:58:26,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-20 15:58:26,341 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 878 flow [2024-06-20 15:58:26,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:26,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:26,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:58:26,342 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)] === [2024-06-20 15:58:26,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash 676560987, now seen corresponding path program 4 times [2024-06-20 15:58:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:26,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576357172] [2024-06-20 15:58:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:26,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576357172] [2024-06-20 15:58:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576357172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:27,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605656823] [2024-06-20 15:58:27,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:27,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:27,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:27,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 878 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:27,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:27,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:27,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:28,156 INFO L124 PetriNetUnfolderBase]: 1639/2617 cut-off events. [2024-06-20 15:58:28,156 INFO L125 PetriNetUnfolderBase]: For 40916/40924 co-relation queries the response was YES. [2024-06-20 15:58:28,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13547 conditions, 2617 events. 1639/2617 cut-off events. For 40916/40924 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13726 event pairs, 438 based on Foata normal form. 12/2628 useless extension candidates. Maximal degree in co-relation 13504. Up to 2315 conditions per place. [2024-06-20 15:58:28,171 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-20 15:58:28,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 136 transitions, 1266 flow [2024-06-20 15:58:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:58:28,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 15:58:28,172 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 878 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:58:28,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 136 transitions, 1266 flow [2024-06-20 15:58:28,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1188 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:28,202 INFO L231 Difference]: Finished difference. Result has 105 places, 109 transitions, 929 flow [2024-06-20 15:58:28,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=105, PETRI_TRANSITIONS=109} [2024-06-20 15:58:28,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 15:58:28,202 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 109 transitions, 929 flow [2024-06-20 15:58:28,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:28,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:28,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:28,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:58:28,203 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)] === [2024-06-20 15:58:28,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 559687267, now seen corresponding path program 2 times [2024-06-20 15:58:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161381296] [2024-06-20 15:58:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:28,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161381296] [2024-06-20 15:58:28,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161381296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:28,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:28,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129261058] [2024-06-20 15:58:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:29,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:29,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 109 transitions, 929 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:29,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:29,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:29,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:29,406 INFO L124 PetriNetUnfolderBase]: 1522/2480 cut-off events. [2024-06-20 15:58:29,406 INFO L125 PetriNetUnfolderBase]: For 43597/43605 co-relation queries the response was YES. [2024-06-20 15:58:29,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13066 conditions, 2480 events. 1522/2480 cut-off events. For 43597/43605 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13388 event pairs, 494 based on Foata normal form. 9/2471 useless extension candidates. Maximal degree in co-relation 13022. Up to 2244 conditions per place. [2024-06-20 15:58:29,417 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 78 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-20 15:58:29,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 121 transitions, 1193 flow [2024-06-20 15:58:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 15:58:29,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 15:58:29,419 INFO L175 Difference]: Start difference. First operand has 105 places, 109 transitions, 929 flow. Second operand 6 states and 112 transitions. [2024-06-20 15:58:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 121 transitions, 1193 flow [2024-06-20 15:58:29,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 1082 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:29,442 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 912 flow [2024-06-20 15:58:29,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-20 15:58:29,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 15:58:29,443 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 912 flow [2024-06-20 15:58:29,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:29,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:29,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:29,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:58:29,443 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:29,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:29,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1152894159, now seen corresponding path program 1 times [2024-06-20 15:58:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:29,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973567181] [2024-06-20 15:58:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:30,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:30,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973567181] [2024-06-20 15:58:30,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973567181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:30,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:30,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:30,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632068705] [2024-06-20 15:58:30,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:30,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:30,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:30,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 912 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:30,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:30,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:30,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:30,603 INFO L124 PetriNetUnfolderBase]: 1476/2430 cut-off events. [2024-06-20 15:58:30,603 INFO L125 PetriNetUnfolderBase]: For 39976/39978 co-relation queries the response was YES. [2024-06-20 15:58:30,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12708 conditions, 2430 events. 1476/2430 cut-off events. For 39976/39978 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13045 event pairs, 434 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 12663. Up to 2248 conditions per place. [2024-06-20 15:58:30,617 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-20 15:58:30,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 128 transitions, 1230 flow [2024-06-20 15:58:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 15:58:30,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:58:30,625 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 912 flow. Second operand 6 states and 114 transitions. [2024-06-20 15:58:30,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 128 transitions, 1230 flow [2024-06-20 15:58:30,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 1158 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:30,674 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 904 flow [2024-06-20 15:58:30,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=904, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-20 15:58:30,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-20 15:58:30,674 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 904 flow [2024-06-20 15:58:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:30,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:30,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:58:30,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1153043889, now seen corresponding path program 2 times [2024-06-20 15:58:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294152989] [2024-06-20 15:58:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:31,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294152989] [2024-06-20 15:58:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294152989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:31,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859669282] [2024-06-20 15:58:31,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:31,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:31,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:31,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 904 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:31,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:31,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:31,799 INFO L124 PetriNetUnfolderBase]: 1478/2436 cut-off events. [2024-06-20 15:58:31,799 INFO L125 PetriNetUnfolderBase]: For 42362/42366 co-relation queries the response was YES. [2024-06-20 15:58:31,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13010 conditions, 2436 events. 1478/2436 cut-off events. For 42362/42366 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13151 event pairs, 438 based on Foata normal form. 4/2439 useless extension candidates. Maximal degree in co-relation 12964. Up to 2242 conditions per place. [2024-06-20 15:58:31,818 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 107 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-20 15:58:31,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 129 transitions, 1228 flow [2024-06-20 15:58:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 15:58:31,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:58:31,819 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 904 flow. Second operand 6 states and 114 transitions. [2024-06-20 15:58:31,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 129 transitions, 1228 flow [2024-06-20 15:58:31,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 1186 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:31,861 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 942 flow [2024-06-20 15:58:31,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=942, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-20 15:58:31,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-20 15:58:31,862 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 942 flow [2024-06-20 15:58:31,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:31,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:58:31,862 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)] === [2024-06-20 15:58:31,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1263962901, now seen corresponding path program 1 times [2024-06-20 15:58:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762331043] [2024-06-20 15:58:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762331043] [2024-06-20 15:58:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762331043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:33,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:33,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068290908] [2024-06-20 15:58:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:33,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:33,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:33,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:33,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:33,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:33,898 INFO L124 PetriNetUnfolderBase]: 1768/2849 cut-off events. [2024-06-20 15:58:33,898 INFO L125 PetriNetUnfolderBase]: For 58938/58940 co-relation queries the response was YES. [2024-06-20 15:58:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15824 conditions, 2849 events. 1768/2849 cut-off events. For 58938/58940 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15394 event pairs, 493 based on Foata normal form. 12/2859 useless extension candidates. Maximal degree in co-relation 15777. Up to 2228 conditions per place. [2024-06-20 15:58:33,915 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-20 15:58:33,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 165 transitions, 1519 flow [2024-06-20 15:58:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 15:58:33,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 15:58:33,917 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 942 flow. Second operand 9 states and 177 transitions. [2024-06-20 15:58:33,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 165 transitions, 1519 flow [2024-06-20 15:58:33,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 165 transitions, 1461 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:33,968 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1148 flow [2024-06-20 15:58:33,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1148, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-20 15:58:33,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-20 15:58:33,969 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1148 flow [2024-06-20 15:58:33,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:33,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:33,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:58:33,970 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:33,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2035377103, now seen corresponding path program 1 times [2024-06-20 15:58:33,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:33,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894809619] [2024-06-20 15:58:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:33,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894809619] [2024-06-20 15:58:35,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894809619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:35,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:35,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:35,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366368294] [2024-06-20 15:58:35,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:35,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:35,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:35,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:35,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:35,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:35,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:35,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:35,701 INFO L124 PetriNetUnfolderBase]: 1660/2731 cut-off events. [2024-06-20 15:58:35,701 INFO L125 PetriNetUnfolderBase]: For 62074/62084 co-relation queries the response was YES. [2024-06-20 15:58:35,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15890 conditions, 2731 events. 1660/2731 cut-off events. For 62074/62084 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15178 event pairs, 489 based on Foata normal form. 10/2722 useless extension candidates. Maximal degree in co-relation 15840. Up to 2464 conditions per place. [2024-06-20 15:58:35,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 24 changer transitions 0/146 dead transitions. [2024-06-20 15:58:35,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 146 transitions, 1480 flow [2024-06-20 15:58:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:58:35,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 15:58:35,716 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1148 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:58:35,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 146 transitions, 1480 flow [2024-06-20 15:58:35,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1380 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:35,762 INFO L231 Difference]: Finished difference. Result has 119 places, 131 transitions, 1138 flow [2024-06-20 15:58:35,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1138, PETRI_PLACES=119, PETRI_TRANSITIONS=131} [2024-06-20 15:58:35,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 15:58:35,763 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 131 transitions, 1138 flow [2024-06-20 15:58:35,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:35,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:35,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:58:35,764 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:35,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -767142021, now seen corresponding path program 2 times [2024-06-20 15:58:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:35,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195208487] [2024-06-20 15:58:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:35,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:36,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:36,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195208487] [2024-06-20 15:58:36,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195208487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:36,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:36,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:36,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614354245] [2024-06-20 15:58:36,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:36,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:36,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:36,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 131 transitions, 1138 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:36,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:36,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:36,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:37,790 INFO L124 PetriNetUnfolderBase]: 1888/3066 cut-off events. [2024-06-20 15:58:37,790 INFO L125 PetriNetUnfolderBase]: For 67958/67962 co-relation queries the response was YES. [2024-06-20 15:58:37,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17506 conditions, 3066 events. 1888/3066 cut-off events. For 67958/67962 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17088 event pairs, 523 based on Foata normal form. 12/3076 useless extension candidates. Maximal degree in co-relation 17455. Up to 2525 conditions per place. [2024-06-20 15:58:37,809 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 107 selfloop transitions, 61 changer transitions 0/173 dead transitions. [2024-06-20 15:58:37,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1693 flow [2024-06-20 15:58:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:58:37,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 15:58:37,811 INFO L175 Difference]: Start difference. First operand has 119 places, 131 transitions, 1138 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:58:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1693 flow [2024-06-20 15:58:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 173 transitions, 1625 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:37,893 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1319 flow [2024-06-20 15:58:37,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1319, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-20 15:58:37,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 15:58:37,894 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1319 flow [2024-06-20 15:58:37,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:37,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:37,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:37,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:58:37,895 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)] === [2024-06-20 15:58:37,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1585033225, now seen corresponding path program 3 times [2024-06-20 15:58:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:37,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630550332] [2024-06-20 15:58:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:37,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:39,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:39,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630550332] [2024-06-20 15:58:39,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630550332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:39,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:39,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:39,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909521554] [2024-06-20 15:58:39,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:39,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:39,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:39,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1319 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:39,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:39,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:39,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:39,780 INFO L124 PetriNetUnfolderBase]: 1970/3228 cut-off events. [2024-06-20 15:58:39,780 INFO L125 PetriNetUnfolderBase]: For 76301/76305 co-relation queries the response was YES. [2024-06-20 15:58:39,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18835 conditions, 3228 events. 1970/3228 cut-off events. For 76301/76305 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18362 event pairs, 494 based on Foata normal form. 12/3238 useless extension candidates. Maximal degree in co-relation 18781. Up to 2071 conditions per place. [2024-06-20 15:58:39,801 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 101 selfloop transitions, 71 changer transitions 0/177 dead transitions. [2024-06-20 15:58:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 177 transitions, 1905 flow [2024-06-20 15:58:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:58:39,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-20 15:58:39,802 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1319 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:58:39,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 177 transitions, 1905 flow [2024-06-20 15:58:39,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 177 transitions, 1813 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:39,874 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1455 flow [2024-06-20 15:58:39,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1455, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-20 15:58:39,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 15:58:39,875 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1455 flow [2024-06-20 15:58:39,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:39,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:39,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:39,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:58:39,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:39,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash -325731563, now seen corresponding path program 4 times [2024-06-20 15:58:39,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:39,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100497805] [2024-06-20 15:58:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:40,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100497805] [2024-06-20 15:58:40,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100497805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:40,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:40,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128934870] [2024-06-20 15:58:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:40,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:40,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:41,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:41,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1455 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:41,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:41,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:41,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:41,823 INFO L124 PetriNetUnfolderBase]: 1950/3196 cut-off events. [2024-06-20 15:58:41,823 INFO L125 PetriNetUnfolderBase]: For 76058/76062 co-relation queries the response was YES. [2024-06-20 15:58:41,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18445 conditions, 3196 events. 1950/3196 cut-off events. For 76058/76062 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18172 event pairs, 539 based on Foata normal form. 12/3206 useless extension candidates. Maximal degree in co-relation 18389. Up to 2635 conditions per place. [2024-06-20 15:58:41,843 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 110 selfloop transitions, 59 changer transitions 0/174 dead transitions. [2024-06-20 15:58:41,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 174 transitions, 1881 flow [2024-06-20 15:58:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:58:41,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 15:58:41,846 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1455 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:58:41,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 174 transitions, 1881 flow [2024-06-20 15:58:41,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 174 transitions, 1731 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:41,931 INFO L231 Difference]: Finished difference. Result has 134 places, 140 transitions, 1383 flow [2024-06-20 15:58:41,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1383, PETRI_PLACES=134, PETRI_TRANSITIONS=140} [2024-06-20 15:58:41,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-20 15:58:41,932 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 140 transitions, 1383 flow [2024-06-20 15:58:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:41,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:41,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:58:41,932 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:41,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1890576951, now seen corresponding path program 2 times [2024-06-20 15:58:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541768164] [2024-06-20 15:58:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541768164] [2024-06-20 15:58:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541768164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128227026] [2024-06-20 15:58:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:43,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:43,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:43,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 140 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:43,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:43,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:43,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:43,610 INFO L124 PetriNetUnfolderBase]: 1814/3018 cut-off events. [2024-06-20 15:58:43,610 INFO L125 PetriNetUnfolderBase]: For 74979/74997 co-relation queries the response was YES. [2024-06-20 15:58:43,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17519 conditions, 3018 events. 1814/3018 cut-off events. For 74979/74997 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17452 event pairs, 525 based on Foata normal form. 13/3000 useless extension candidates. Maximal degree in co-relation 17462. Up to 2716 conditions per place. [2024-06-20 15:58:43,630 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-20 15:58:43,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 159 transitions, 1835 flow [2024-06-20 15:58:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 15:58:43,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 15:58:43,631 INFO L175 Difference]: Start difference. First operand has 134 places, 140 transitions, 1383 flow. Second operand 7 states and 128 transitions. [2024-06-20 15:58:43,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 159 transitions, 1835 flow [2024-06-20 15:58:43,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1624 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 15:58:43,688 INFO L231 Difference]: Finished difference. Result has 132 places, 148 transitions, 1351 flow [2024-06-20 15:58:43,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1351, PETRI_PLACES=132, PETRI_TRANSITIONS=148} [2024-06-20 15:58:43,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 15:58:43,688 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 148 transitions, 1351 flow [2024-06-20 15:58:43,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:43,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:43,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:43,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:58:43,689 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:43,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1890564861, now seen corresponding path program 3 times [2024-06-20 15:58:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868219488] [2024-06-20 15:58:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868219488] [2024-06-20 15:58:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868219488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159870880] [2024-06-20 15:58:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:44,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:44,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 148 transitions, 1351 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:44,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:45,296 INFO L124 PetriNetUnfolderBase]: 1810/3011 cut-off events. [2024-06-20 15:58:45,296 INFO L125 PetriNetUnfolderBase]: For 76913/76931 co-relation queries the response was YES. [2024-06-20 15:58:45,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17379 conditions, 3011 events. 1810/3011 cut-off events. For 76913/76931 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17411 event pairs, 524 based on Foata normal form. 12/2993 useless extension candidates. Maximal degree in co-relation 17324. Up to 2725 conditions per place. [2024-06-20 15:58:45,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 113 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-20 15:58:45,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 159 transitions, 1670 flow [2024-06-20 15:58:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 15:58:45,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:58:45,318 INFO L175 Difference]: Start difference. First operand has 132 places, 148 transitions, 1351 flow. Second operand 7 states and 126 transitions. [2024-06-20 15:58:45,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 159 transitions, 1670 flow [2024-06-20 15:58:45,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 159 transitions, 1586 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:45,389 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 1340 flow [2024-06-20 15:58:45,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1340, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2024-06-20 15:58:45,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 15:58:45,392 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 1340 flow [2024-06-20 15:58:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:45,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:45,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:58:45,393 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:45,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1713497697, now seen corresponding path program 1 times [2024-06-20 15:58:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:45,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598601941] [2024-06-20 15:58:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598601941] [2024-06-20 15:58:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598601941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:46,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777900628] [2024-06-20 15:58:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:46,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:46,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 1340 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:46,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:46,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:46,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:46,889 INFO L124 PetriNetUnfolderBase]: 1866/3112 cut-off events. [2024-06-20 15:58:46,889 INFO L125 PetriNetUnfolderBase]: For 81094/81096 co-relation queries the response was YES. [2024-06-20 15:58:46,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 3112 events. 1866/3112 cut-off events. For 81094/81096 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18046 event pairs, 522 based on Foata normal form. 1/3112 useless extension candidates. Maximal degree in co-relation 17892. Up to 2847 conditions per place. [2024-06-20 15:58:46,910 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 14 changer transitions 0/168 dead transitions. [2024-06-20 15:58:46,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 168 transitions, 1746 flow [2024-06-20 15:58:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:58:46,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 15:58:46,911 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 1340 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:58:46,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 168 transitions, 1746 flow [2024-06-20 15:58:46,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 168 transitions, 1684 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:46,990 INFO L231 Difference]: Finished difference. Result has 138 places, 152 transitions, 1360 flow [2024-06-20 15:58:46,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=138, PETRI_TRANSITIONS=152} [2024-06-20 15:58:46,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 15:58:46,990 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 152 transitions, 1360 flow [2024-06-20 15:58:46,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:46,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:46,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:46,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:58:46,991 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:46,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1713617853, now seen corresponding path program 1 times [2024-06-20 15:58:46,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:46,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420945428] [2024-06-20 15:58:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:46,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:48,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420945428] [2024-06-20 15:58:48,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420945428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:48,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:48,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711166651] [2024-06-20 15:58:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 152 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:48,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:48,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:48,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:48,711 INFO L124 PetriNetUnfolderBase]: 1881/3135 cut-off events. [2024-06-20 15:58:48,712 INFO L125 PetriNetUnfolderBase]: For 87748/87750 co-relation queries the response was YES. [2024-06-20 15:58:48,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18442 conditions, 3135 events. 1881/3135 cut-off events. For 87748/87750 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18147 event pairs, 520 based on Foata normal form. 4/3138 useless extension candidates. Maximal degree in co-relation 18384. Up to 2866 conditions per place. [2024-06-20 15:58:48,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 17 changer transitions 0/171 dead transitions. [2024-06-20 15:58:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 1780 flow [2024-06-20 15:58:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:58:48,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 15:58:48,742 INFO L175 Difference]: Start difference. First operand has 138 places, 152 transitions, 1360 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:58:48,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 1780 flow [2024-06-20 15:58:48,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 171 transitions, 1718 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:48,798 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1410 flow [2024-06-20 15:58:48,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1410, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2024-06-20 15:58:48,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 15:58:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1410 flow [2024-06-20 15:58:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:58:48,799 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)] === [2024-06-20 15:58:48,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1384629825, now seen corresponding path program 2 times [2024-06-20 15:58:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551572047] [2024-06-20 15:58:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:49,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:49,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551572047] [2024-06-20 15:58:49,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551572047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:49,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:49,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:49,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748963158] [2024-06-20 15:58:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:49,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:49,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:49,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1410 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:49,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:49,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:50,305 INFO L124 PetriNetUnfolderBase]: 1912/3183 cut-off events. [2024-06-20 15:58:50,305 INFO L125 PetriNetUnfolderBase]: For 95438/95442 co-relation queries the response was YES. [2024-06-20 15:58:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19382 conditions, 3183 events. 1912/3183 cut-off events. For 95438/95442 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18517 event pairs, 522 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 19322. Up to 2856 conditions per place. [2024-06-20 15:58:50,328 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 138 selfloop transitions, 31 changer transitions 0/179 dead transitions. [2024-06-20 15:58:50,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 179 transitions, 1958 flow [2024-06-20 15:58:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:58:50,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-20 15:58:50,329 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1410 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:58:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 179 transitions, 1958 flow [2024-06-20 15:58:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 179 transitions, 1893 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:50,409 INFO L231 Difference]: Finished difference. Result has 145 places, 166 transitions, 1540 flow [2024-06-20 15:58:50,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1540, PETRI_PLACES=145, PETRI_TRANSITIONS=166} [2024-06-20 15:58:50,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-20 15:58:50,410 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 166 transitions, 1540 flow [2024-06-20 15:58:50,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:50,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:50,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:58:50,410 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)] === [2024-06-20 15:58:50,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1890749373, now seen corresponding path program 3 times [2024-06-20 15:58:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:50,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706253519] [2024-06-20 15:58:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:50,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:51,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:51,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706253519] [2024-06-20 15:58:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706253519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195011309] [2024-06-20 15:58:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:51,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:51,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 166 transitions, 1540 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:51,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:51,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:51,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:52,063 INFO L124 PetriNetUnfolderBase]: 1895/3162 cut-off events. [2024-06-20 15:58:52,063 INFO L125 PetriNetUnfolderBase]: For 101501/101505 co-relation queries the response was YES. [2024-06-20 15:58:52,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19913 conditions, 3162 events. 1895/3162 cut-off events. For 101501/101505 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18403 event pairs, 524 based on Foata normal form. 6/3167 useless extension candidates. Maximal degree in co-relation 19851. Up to 2880 conditions per place. [2024-06-20 15:58:52,083 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 149 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-20 15:58:52,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 181 transitions, 1991 flow [2024-06-20 15:58:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:58:52,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 15:58:52,084 INFO L175 Difference]: Start difference. First operand has 145 places, 166 transitions, 1540 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:58:52,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 181 transitions, 1991 flow [2024-06-20 15:58:52,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 181 transitions, 1938 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:52,156 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 1607 flow [2024-06-20 15:58:52,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1607, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-06-20 15:58:52,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-20 15:58:52,157 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 1607 flow [2024-06-20 15:58:52,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:52,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:52,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:58:52,157 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)] === [2024-06-20 15:58:52,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1890995451, now seen corresponding path program 1 times [2024-06-20 15:58:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:52,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342518923] [2024-06-20 15:58:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342518923] [2024-06-20 15:58:53,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342518923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714258429] [2024-06-20 15:58:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:53,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 1607 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:58:53,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:53,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:53,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:54,300 INFO L124 PetriNetUnfolderBase]: 1846/3072 cut-off events. [2024-06-20 15:58:54,300 INFO L125 PetriNetUnfolderBase]: For 102474/102488 co-relation queries the response was YES. [2024-06-20 15:58:54,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19838 conditions, 3072 events. 1846/3072 cut-off events. For 102474/102488 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17860 event pairs, 521 based on Foata normal form. 9/3057 useless extension candidates. Maximal degree in co-relation 19774. Up to 2819 conditions per place. [2024-06-20 15:58:54,324 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-20 15:58:54,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 182 transitions, 1993 flow [2024-06-20 15:58:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 15:58:54,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 15:58:54,325 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 1607 flow. Second operand 8 states and 139 transitions. [2024-06-20 15:58:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 182 transitions, 1993 flow [2024-06-20 15:58:54,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 182 transitions, 1918 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:54,408 INFO L231 Difference]: Finished difference. Result has 152 places, 172 transitions, 1608 flow [2024-06-20 15:58:54,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=152, PETRI_TRANSITIONS=172} [2024-06-20 15:58:54,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 15:58:54,408 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 172 transitions, 1608 flow [2024-06-20 15:58:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:58:54,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:54,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:54,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:58:54,409 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)] === [2024-06-20 15:58:54,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1333539948, now seen corresponding path program 1 times [2024-06-20 15:58:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26402391] [2024-06-20 15:58:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:55,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:55,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26402391] [2024-06-20 15:58:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26402391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:55,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:55,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817854359] [2024-06-20 15:58:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:55,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:55,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 172 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:55,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:55,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:55,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:55,792 INFO L124 PetriNetUnfolderBase]: 2005/3278 cut-off events. [2024-06-20 15:58:55,792 INFO L125 PetriNetUnfolderBase]: For 108285/108291 co-relation queries the response was YES. [2024-06-20 15:58:55,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20849 conditions, 3278 events. 2005/3278 cut-off events. For 108285/108291 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18681 event pairs, 540 based on Foata normal form. 8/3285 useless extension candidates. Maximal degree in co-relation 20784. Up to 3049 conditions per place. [2024-06-20 15:58:55,816 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-20 15:58:55,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 195 transitions, 2108 flow [2024-06-20 15:58:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:58:55,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 15:58:55,818 INFO L175 Difference]: Start difference. First operand has 152 places, 172 transitions, 1608 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:58:55,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 195 transitions, 2108 flow [2024-06-20 15:58:55,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 195 transitions, 2008 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:55,920 INFO L231 Difference]: Finished difference. Result has 152 places, 175 transitions, 1612 flow [2024-06-20 15:58:55,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1612, PETRI_PLACES=152, PETRI_TRANSITIONS=175} [2024-06-20 15:58:55,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 15:58:55,920 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 175 transitions, 1612 flow [2024-06-20 15:58:55,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:55,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:55,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:58:55,921 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:55,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash 636386410, now seen corresponding path program 2 times [2024-06-20 15:58:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:55,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136058869] [2024-06-20 15:58:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136058869] [2024-06-20 15:58:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136058869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:56,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:56,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228710655] [2024-06-20 15:58:56,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:56,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:56,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 175 transitions, 1612 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:56,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:56,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:57,277 INFO L124 PetriNetUnfolderBase]: 2031/3320 cut-off events. [2024-06-20 15:58:57,277 INFO L125 PetriNetUnfolderBase]: For 116427/116433 co-relation queries the response was YES. [2024-06-20 15:58:57,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21643 conditions, 3320 events. 2031/3320 cut-off events. For 116427/116433 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19033 event pairs, 541 based on Foata normal form. 8/3327 useless extension candidates. Maximal degree in co-relation 21578. Up to 3065 conditions per place. [2024-06-20 15:58:57,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-20 15:58:57,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 202 transitions, 2273 flow [2024-06-20 15:58:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 15:58:57,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 15:58:57,302 INFO L175 Difference]: Start difference. First operand has 152 places, 175 transitions, 1612 flow. Second operand 7 states and 130 transitions. [2024-06-20 15:58:57,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 202 transitions, 2273 flow [2024-06-20 15:58:57,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 202 transitions, 2207 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:57,453 INFO L231 Difference]: Finished difference. Result has 156 places, 183 transitions, 1747 flow [2024-06-20 15:58:57,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=156, PETRI_TRANSITIONS=183} [2024-06-20 15:58:57,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-20 15:58:57,454 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 183 transitions, 1747 flow [2024-06-20 15:58:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:57,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:57,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:58:57,455 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 380717350, now seen corresponding path program 1 times [2024-06-20 15:58:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308531623] [2024-06-20 15:58:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308531623] [2024-06-20 15:58:58,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308531623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:58,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:58,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:58,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028448022] [2024-06-20 15:58:58,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:58,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:58,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:58,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:58,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 183 transitions, 1747 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:58:58,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:58,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:58,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:59,100 INFO L124 PetriNetUnfolderBase]: 1890/3148 cut-off events. [2024-06-20 15:58:59,100 INFO L125 PetriNetUnfolderBase]: For 123929/123943 co-relation queries the response was YES. [2024-06-20 15:58:59,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21275 conditions, 3148 events. 1890/3148 cut-off events. For 123929/123943 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18440 event pairs, 513 based on Foata normal form. 12/3136 useless extension candidates. Maximal degree in co-relation 21208. Up to 2816 conditions per place. [2024-06-20 15:58:59,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 30 changer transitions 0/202 dead transitions. [2024-06-20 15:58:59,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 202 transitions, 2203 flow [2024-06-20 15:58:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:58:59,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 15:58:59,126 INFO L175 Difference]: Start difference. First operand has 156 places, 183 transitions, 1747 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:58:59,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 202 transitions, 2203 flow [2024-06-20 15:58:59,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 202 transitions, 2133 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:59,243 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 1791 flow [2024-06-20 15:58:59,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-06-20 15:58:59,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 15:58:59,244 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 1791 flow [2024-06-20 15:58:59,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:58:59,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:59,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:59,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:58:59,244 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:59,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash -181681298, now seen corresponding path program 3 times [2024-06-20 15:58:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:59,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054012629] [2024-06-20 15:58:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054012629] [2024-06-20 15:58:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054012629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263042922] [2024-06-20 15:58:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:59,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:59,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:59,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:59,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:00,593 INFO L124 PetriNetUnfolderBase]: 2045/3342 cut-off events. [2024-06-20 15:59:00,593 INFO L125 PetriNetUnfolderBase]: For 128413/128419 co-relation queries the response was YES. [2024-06-20 15:59:00,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22666 conditions, 3342 events. 2045/3342 cut-off events. For 128413/128419 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19109 event pairs, 539 based on Foata normal form. 8/3349 useless extension candidates. Maximal degree in co-relation 22597. Up to 3105 conditions per place. [2024-06-20 15:59:00,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 22 changer transitions 0/205 dead transitions. [2024-06-20 15:59:00,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 205 transitions, 2274 flow [2024-06-20 15:59:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:59:00,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 15:59:00,622 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 1791 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:59:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 205 transitions, 2274 flow [2024-06-20 15:59:00,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 205 transitions, 2148 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:00,758 INFO L231 Difference]: Finished difference. Result has 162 places, 187 transitions, 1732 flow [2024-06-20 15:59:00,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1732, PETRI_PLACES=162, PETRI_TRANSITIONS=187} [2024-06-20 15:59:00,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 15:59:00,758 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 187 transitions, 1732 flow [2024-06-20 15:59:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:00,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:00,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:59:00,759 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)] === [2024-06-20 15:59:00,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -170253458, now seen corresponding path program 4 times [2024-06-20 15:59:00,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:00,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126721062] [2024-06-20 15:59:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:00,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:01,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126721062] [2024-06-20 15:59:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126721062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818866287] [2024-06-20 15:59:01,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:01,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:01,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 187 transitions, 1732 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:01,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:01,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:01,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:02,103 INFO L124 PetriNetUnfolderBase]: 2055/3356 cut-off events. [2024-06-20 15:59:02,103 INFO L125 PetriNetUnfolderBase]: For 133300/133306 co-relation queries the response was YES. [2024-06-20 15:59:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22759 conditions, 3356 events. 2055/3356 cut-off events. For 133300/133306 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19219 event pairs, 539 based on Foata normal form. 8/3363 useless extension candidates. Maximal degree in co-relation 22689. Up to 3099 conditions per place. [2024-06-20 15:59:02,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 30 changer transitions 0/206 dead transitions. [2024-06-20 15:59:02,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 206 transitions, 2262 flow [2024-06-20 15:59:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 15:59:02,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:02,131 INFO L175 Difference]: Start difference. First operand has 162 places, 187 transitions, 1732 flow. Second operand 7 states and 126 transitions. [2024-06-20 15:59:02,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 206 transitions, 2262 flow [2024-06-20 15:59:02,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 206 transitions, 2187 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:02,263 INFO L231 Difference]: Finished difference. Result has 162 places, 190 transitions, 1787 flow [2024-06-20 15:59:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=162, PETRI_TRANSITIONS=190} [2024-06-20 15:59:02,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 15:59:02,264 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 190 transitions, 1787 flow [2024-06-20 15:59:02,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:02,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:02,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:59:02,265 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)] === [2024-06-20 15:59:02,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1522038234, now seen corresponding path program 5 times [2024-06-20 15:59:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:02,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48742737] [2024-06-20 15:59:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:03,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:03,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48742737] [2024-06-20 15:59:03,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48742737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:03,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:03,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:03,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382142819] [2024-06-20 15:59:03,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:03,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:03,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 190 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:03,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:03,677 INFO L124 PetriNetUnfolderBase]: 2073/3388 cut-off events. [2024-06-20 15:59:03,677 INFO L125 PetriNetUnfolderBase]: For 142188/142196 co-relation queries the response was YES. [2024-06-20 15:59:03,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23499 conditions, 3388 events. 2073/3388 cut-off events. For 142188/142196 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19455 event pairs, 549 based on Foata normal form. 10/3397 useless extension candidates. Maximal degree in co-relation 23428. Up to 3084 conditions per place. [2024-06-20 15:59:03,705 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-20 15:59:03,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 2498 flow [2024-06-20 15:59:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:59:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 15:59:03,707 INFO L175 Difference]: Start difference. First operand has 162 places, 190 transitions, 1787 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:59:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 2498 flow [2024-06-20 15:59:03,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 213 transitions, 2394 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:03,815 INFO L231 Difference]: Finished difference. Result has 165 places, 198 transitions, 1939 flow [2024-06-20 15:59:03,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1939, PETRI_PLACES=165, PETRI_TRANSITIONS=198} [2024-06-20 15:59:03,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-20 15:59:03,815 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 198 transitions, 1939 flow [2024-06-20 15:59:03,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:03,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:03,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:59:03,816 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)] === [2024-06-20 15:59:03,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash 994293570, now seen corresponding path program 6 times [2024-06-20 15:59:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710749641] [2024-06-20 15:59:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710749641] [2024-06-20 15:59:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710749641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135491663] [2024-06-20 15:59:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:04,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:04,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:04,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 198 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:04,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:04,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:04,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:05,144 INFO L124 PetriNetUnfolderBase]: 2067/3380 cut-off events. [2024-06-20 15:59:05,144 INFO L125 PetriNetUnfolderBase]: For 148692/148700 co-relation queries the response was YES. [2024-06-20 15:59:05,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23810 conditions, 3380 events. 2067/3380 cut-off events. For 148692/148700 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19394 event pairs, 551 based on Foata normal form. 10/3389 useless extension candidates. Maximal degree in co-relation 23737. Up to 3079 conditions per place. [2024-06-20 15:59:05,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 46 changer transitions 0/213 dead transitions. [2024-06-20 15:59:05,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 213 transitions, 2448 flow [2024-06-20 15:59:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 15:59:05,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:05,175 INFO L175 Difference]: Start difference. First operand has 165 places, 198 transitions, 1939 flow. Second operand 7 states and 126 transitions. [2024-06-20 15:59:05,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 213 transitions, 2448 flow [2024-06-20 15:59:05,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 213 transitions, 2266 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 15:59:05,315 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 1876 flow [2024-06-20 15:59:05,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1876, PETRI_PLACES=168, PETRI_TRANSITIONS=199} [2024-06-20 15:59:05,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 15:59:05,316 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 1876 flow [2024-06-20 15:59:05,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:05,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:05,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:59:05,317 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1508697818, now seen corresponding path program 2 times [2024-06-20 15:59:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119198173] [2024-06-20 15:59:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:06,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119198173] [2024-06-20 15:59:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119198173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:06,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104963302] [2024-06-20 15:59:06,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 199 transitions, 1876 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:06,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:06,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:07,097 INFO L124 PetriNetUnfolderBase]: 1926/3200 cut-off events. [2024-06-20 15:59:07,097 INFO L125 PetriNetUnfolderBase]: For 150075/150099 co-relation queries the response was YES. [2024-06-20 15:59:07,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22602 conditions, 3200 events. 1926/3200 cut-off events. For 150075/150099 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18765 event pairs, 522 based on Foata normal form. 10/3185 useless extension candidates. Maximal degree in co-relation 22528. Up to 2903 conditions per place. [2024-06-20 15:59:07,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 18 changer transitions 0/212 dead transitions. [2024-06-20 15:59:07,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 212 transitions, 2326 flow [2024-06-20 15:59:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 15:59:07,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 15:59:07,127 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 1876 flow. Second operand 8 states and 139 transitions. [2024-06-20 15:59:07,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 212 transitions, 2326 flow [2024-06-20 15:59:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 212 transitions, 2255 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:59:07,302 INFO L231 Difference]: Finished difference. Result has 172 places, 202 transitions, 1903 flow [2024-06-20 15:59:07,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=172, PETRI_TRANSITIONS=202} [2024-06-20 15:59:07,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-20 15:59:07,302 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 202 transitions, 1903 flow [2024-06-20 15:59:07,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:07,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:07,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:07,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:59:07,303 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:07,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1001474596, now seen corresponding path program 3 times [2024-06-20 15:59:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:07,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025446898] [2024-06-20 15:59:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025446898] [2024-06-20 15:59:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025446898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:08,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:08,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508694307] [2024-06-20 15:59:08,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:08,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:08,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:08,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:08,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:08,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 202 transitions, 1903 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:08,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:08,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:08,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:08,922 INFO L124 PetriNetUnfolderBase]: 1945/3221 cut-off events. [2024-06-20 15:59:08,922 INFO L125 PetriNetUnfolderBase]: For 159954/159986 co-relation queries the response was YES. [2024-06-20 15:59:08,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23248 conditions, 3221 events. 1945/3221 cut-off events. For 159954/159986 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18897 event pairs, 522 based on Foata normal form. 13/3205 useless extension candidates. Maximal degree in co-relation 23173. Up to 2828 conditions per place. [2024-06-20 15:59:08,949 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 57 changer transitions 0/225 dead transitions. [2024-06-20 15:59:08,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 225 transitions, 2685 flow [2024-06-20 15:59:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:59:08,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 15:59:08,950 INFO L175 Difference]: Start difference. First operand has 172 places, 202 transitions, 1903 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:59:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 225 transitions, 2685 flow [2024-06-20 15:59:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 225 transitions, 2609 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:09,078 INFO L231 Difference]: Finished difference. Result has 174 places, 211 transitions, 2109 flow [2024-06-20 15:59:09,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2109, PETRI_PLACES=174, PETRI_TRANSITIONS=211} [2024-06-20 15:59:09,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 15:59:09,079 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 211 transitions, 2109 flow [2024-06-20 15:59:09,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:09,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:09,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:59:09,079 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1522030298, now seen corresponding path program 4 times [2024-06-20 15:59:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:09,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467682850] [2024-06-20 15:59:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:09,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467682850] [2024-06-20 15:59:10,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467682850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:10,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:10,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374400149] [2024-06-20 15:59:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:10,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:10,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:10,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 211 transitions, 2109 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:10,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:10,758 INFO L124 PetriNetUnfolderBase]: 1933/3205 cut-off events. [2024-06-20 15:59:10,758 INFO L125 PetriNetUnfolderBase]: For 164412/164428 co-relation queries the response was YES. [2024-06-20 15:59:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23464 conditions, 3205 events. 1933/3205 cut-off events. For 164412/164428 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18789 event pairs, 520 based on Foata normal form. 13/3189 useless extension candidates. Maximal degree in co-relation 23388. Up to 2866 conditions per place. [2024-06-20 15:59:10,787 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 161 selfloop transitions, 36 changer transitions 0/222 dead transitions. [2024-06-20 15:59:10,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 222 transitions, 2539 flow [2024-06-20 15:59:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 15:59:10,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 15:59:10,788 INFO L175 Difference]: Start difference. First operand has 174 places, 211 transitions, 2109 flow. Second operand 8 states and 142 transitions. [2024-06-20 15:59:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 222 transitions, 2539 flow [2024-06-20 15:59:10,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 222 transitions, 2435 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 15:59:10,944 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2083 flow [2024-06-20 15:59:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2083, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-20 15:59:10,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-20 15:59:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2083 flow [2024-06-20 15:59:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:10,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:10,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:59:10,946 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)] === [2024-06-20 15:59:10,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1578822179, now seen corresponding path program 1 times [2024-06-20 15:59:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:10,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062432257] [2024-06-20 15:59:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:12,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:12,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062432257] [2024-06-20 15:59:12,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062432257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:12,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:12,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297616527] [2024-06-20 15:59:12,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:12,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:12,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2083 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:12,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:12,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:12,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:13,585 INFO L124 PetriNetUnfolderBase]: 1998/3323 cut-off events. [2024-06-20 15:59:13,585 INFO L125 PetriNetUnfolderBase]: For 170354/170358 co-relation queries the response was YES. [2024-06-20 15:59:13,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24151 conditions, 3323 events. 1998/3323 cut-off events. For 170354/170358 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19500 event pairs, 518 based on Foata normal form. 5/3322 useless extension candidates. Maximal degree in co-relation 24073. Up to 3029 conditions per place. [2024-06-20 15:59:13,609 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 18 changer transitions 0/231 dead transitions. [2024-06-20 15:59:13,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 231 transitions, 2637 flow [2024-06-20 15:59:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:59:13,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 15:59:13,610 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2083 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:59:13,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 231 transitions, 2637 flow [2024-06-20 15:59:13,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 231 transitions, 2529 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:13,788 INFO L231 Difference]: Finished difference. Result has 180 places, 214 transitions, 2079 flow [2024-06-20 15:59:13,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2079, PETRI_PLACES=180, PETRI_TRANSITIONS=214} [2024-06-20 15:59:13,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-20 15:59:13,789 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 214 transitions, 2079 flow [2024-06-20 15:59:13,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:13,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:13,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:59:13,789 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)] === [2024-06-20 15:59:13,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1582546829, now seen corresponding path program 2 times [2024-06-20 15:59:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731103940] [2024-06-20 15:59:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:13,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:15,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731103940] [2024-06-20 15:59:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731103940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:15,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:15,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746026612] [2024-06-20 15:59:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:15,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:15,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:15,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:15,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 214 transitions, 2079 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:15,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:15,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:15,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:16,375 INFO L124 PetriNetUnfolderBase]: 2034/3380 cut-off events. [2024-06-20 15:59:16,375 INFO L125 PetriNetUnfolderBase]: For 181381/181385 co-relation queries the response was YES. [2024-06-20 15:59:16,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25063 conditions, 3380 events. 2034/3380 cut-off events. For 181381/181385 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19912 event pairs, 515 based on Foata normal form. 4/3378 useless extension candidates. Maximal degree in co-relation 24984. Up to 3066 conditions per place. [2024-06-20 15:59:16,405 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 204 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-20 15:59:16,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 240 transitions, 2879 flow [2024-06-20 15:59:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:59:16,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 15:59:16,407 INFO L175 Difference]: Start difference. First operand has 180 places, 214 transitions, 2079 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:59:16,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 240 transitions, 2879 flow [2024-06-20 15:59:16,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 240 transitions, 2803 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:16,627 INFO L231 Difference]: Finished difference. Result has 183 places, 225 transitions, 2287 flow [2024-06-20 15:59:16,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2287, PETRI_PLACES=183, PETRI_TRANSITIONS=225} [2024-06-20 15:59:16,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 15:59:16,627 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 225 transitions, 2287 flow [2024-06-20 15:59:16,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:16,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:16,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:16,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:59:16,628 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:16,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:16,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1516310643, now seen corresponding path program 3 times [2024-06-20 15:59:16,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:16,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975727019] [2024-06-20 15:59:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975727019] [2024-06-20 15:59:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975727019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:18,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:18,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334761932] [2024-06-20 15:59:18,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:18,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:18,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 225 transitions, 2287 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:18,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:18,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:18,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:18,894 INFO L124 PetriNetUnfolderBase]: 2054/3418 cut-off events. [2024-06-20 15:59:18,894 INFO L125 PetriNetUnfolderBase]: For 190810/190816 co-relation queries the response was YES. [2024-06-20 15:59:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25940 conditions, 3418 events. 2054/3418 cut-off events. For 190810/190816 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20251 event pairs, 520 based on Foata normal form. 6/3418 useless extension candidates. Maximal degree in co-relation 25859. Up to 3085 conditions per place. [2024-06-20 15:59:18,927 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 204 selfloop transitions, 31 changer transitions 0/245 dead transitions. [2024-06-20 15:59:18,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 245 transitions, 3053 flow [2024-06-20 15:59:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:59:18,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 15:59:18,929 INFO L175 Difference]: Start difference. First operand has 183 places, 225 transitions, 2287 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:59:18,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 245 transitions, 3053 flow [2024-06-20 15:59:19,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 245 transitions, 2966 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:59:19,167 INFO L231 Difference]: Finished difference. Result has 187 places, 232 transitions, 2426 flow [2024-06-20 15:59:19,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2426, PETRI_PLACES=187, PETRI_TRANSITIONS=232} [2024-06-20 15:59:19,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 15:59:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 232 transitions, 2426 flow [2024-06-20 15:59:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:19,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:19,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:59:19,168 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1508958993, now seen corresponding path program 4 times [2024-06-20 15:59:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85495503] [2024-06-20 15:59:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:20,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85495503] [2024-06-20 15:59:20,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85495503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:20,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:20,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582794889] [2024-06-20 15:59:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:20,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:20,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:20,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 232 transitions, 2426 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:20,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:20,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:20,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:21,433 INFO L124 PetriNetUnfolderBase]: 2050/3410 cut-off events. [2024-06-20 15:59:21,434 INFO L125 PetriNetUnfolderBase]: For 195805/195811 co-relation queries the response was YES. [2024-06-20 15:59:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26243 conditions, 3410 events. 2050/3410 cut-off events. For 195805/195811 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20133 event pairs, 516 based on Foata normal form. 5/3410 useless extension candidates. Maximal degree in co-relation 26160. Up to 3076 conditions per place. [2024-06-20 15:59:21,461 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 39 changer transitions 0/253 dead transitions. [2024-06-20 15:59:21,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 253 transitions, 3126 flow [2024-06-20 15:59:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:59:21,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:21,462 INFO L175 Difference]: Start difference. First operand has 187 places, 232 transitions, 2426 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:59:21,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 253 transitions, 3126 flow [2024-06-20 15:59:21,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 253 transitions, 2947 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:21,669 INFO L231 Difference]: Finished difference. Result has 192 places, 242 transitions, 2550 flow [2024-06-20 15:59:21,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2550, PETRI_PLACES=192, PETRI_TRANSITIONS=242} [2024-06-20 15:59:21,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-20 15:59:21,669 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 242 transitions, 2550 flow [2024-06-20 15:59:21,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 15:59:21,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:21,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:21,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:59:21,670 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:21,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1508681946, now seen corresponding path program 1 times [2024-06-20 15:59:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203592561] [2024-06-20 15:59:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:23,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:23,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203592561] [2024-06-20 15:59:23,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203592561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:23,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:23,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:59:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632479936] [2024-06-20 15:59:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:59:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:59:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:59:23,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:59:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 242 transitions, 2550 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:23,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:59:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:24,454 INFO L124 PetriNetUnfolderBase]: 2002/3327 cut-off events. [2024-06-20 15:59:24,455 INFO L125 PetriNetUnfolderBase]: For 202223/202241 co-relation queries the response was YES. [2024-06-20 15:59:24,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26171 conditions, 3327 events. 2002/3327 cut-off events. For 202223/202241 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19583 event pairs, 523 based on Foata normal form. 12/3315 useless extension candidates. Maximal degree in co-relation 26085. Up to 3009 conditions per place. [2024-06-20 15:59:24,489 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 20 changer transitions 0/256 dead transitions. [2024-06-20 15:59:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 256 transitions, 3100 flow [2024-06-20 15:59:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:59:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:59:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 15:59:24,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 15:59:24,490 INFO L175 Difference]: Start difference. First operand has 192 places, 242 transitions, 2550 flow. Second operand 9 states and 154 transitions. [2024-06-20 15:59:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 256 transitions, 3100 flow [2024-06-20 15:59:24,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 256 transitions, 2995 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 15:59:24,741 INFO L231 Difference]: Finished difference. Result has 198 places, 244 transitions, 2552 flow [2024-06-20 15:59:24,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2552, PETRI_PLACES=198, PETRI_TRANSITIONS=244} [2024-06-20 15:59:24,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-20 15:59:24,742 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 244 transitions, 2552 flow [2024-06-20 15:59:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:24,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:24,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:24,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:59:24,742 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:24,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:24,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1375630522, now seen corresponding path program 1 times [2024-06-20 15:59:24,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:24,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289788450] [2024-06-20 15:59:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:24,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:25,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:25,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289788450] [2024-06-20 15:59:25,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289788450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:25,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:25,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:25,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546481994] [2024-06-20 15:59:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:25,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:25,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 244 transitions, 2552 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:25,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:25,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:26,318 INFO L124 PetriNetUnfolderBase]: 2181/3554 cut-off events. [2024-06-20 15:59:26,318 INFO L125 PetriNetUnfolderBase]: For 211138/211142 co-relation queries the response was YES. [2024-06-20 15:59:26,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27642 conditions, 3554 events. 2181/3554 cut-off events. For 211138/211142 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20470 event pairs, 540 based on Foata normal form. 6/3559 useless extension candidates. Maximal degree in co-relation 27554. Up to 3272 conditions per place. [2024-06-20 15:59:26,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 29 changer transitions 0/274 dead transitions. [2024-06-20 15:59:26,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 3266 flow [2024-06-20 15:59:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:59:26,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 15:59:26,353 INFO L175 Difference]: Start difference. First operand has 198 places, 244 transitions, 2552 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:59:26,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 3266 flow [2024-06-20 15:59:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 274 transitions, 3169 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:26,687 INFO L231 Difference]: Finished difference. Result has 200 places, 248 transitions, 2620 flow [2024-06-20 15:59:26,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2620, PETRI_PLACES=200, PETRI_TRANSITIONS=248} [2024-06-20 15:59:26,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 15:59:26,688 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 248 transitions, 2620 flow [2024-06-20 15:59:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:26,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:26,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:26,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:59:26,689 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:26,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1315719048, now seen corresponding path program 2 times [2024-06-20 15:59:26,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:26,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865666092] [2024-06-20 15:59:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:26,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865666092] [2024-06-20 15:59:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865666092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:27,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:27,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146132362] [2024-06-20 15:59:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:27,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:27,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 248 transitions, 2620 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:27,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:27,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:28,321 INFO L124 PetriNetUnfolderBase]: 2196/3579 cut-off events. [2024-06-20 15:59:28,321 INFO L125 PetriNetUnfolderBase]: For 221298/221302 co-relation queries the response was YES. [2024-06-20 15:59:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28348 conditions, 3579 events. 2196/3579 cut-off events. For 221298/221302 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20636 event pairs, 540 based on Foata normal form. 6/3584 useless extension candidates. Maximal degree in co-relation 28258. Up to 3280 conditions per place. [2024-06-20 15:59:28,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-20 15:59:28,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 282 transitions, 3384 flow [2024-06-20 15:59:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:59:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:59:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 15:59:28,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:59:28,358 INFO L175 Difference]: Start difference. First operand has 200 places, 248 transitions, 2620 flow. Second operand 9 states and 164 transitions. [2024-06-20 15:59:28,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 282 transitions, 3384 flow [2024-06-20 15:59:28,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 282 transitions, 3271 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:28,666 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 2710 flow [2024-06-20 15:59:28,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2710, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-20 15:59:28,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-20 15:59:28,666 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 2710 flow [2024-06-20 15:59:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:28,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:28,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:59:28,667 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)] === [2024-06-20 15:59:28,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1378490458, now seen corresponding path program 1 times [2024-06-20 15:59:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:28,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293383108] [2024-06-20 15:59:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:28,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:29,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:29,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293383108] [2024-06-20 15:59:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293383108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:29,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318135556] [2024-06-20 15:59:29,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:29,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:29,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 2710 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:29,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:29,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:29,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:30,305 INFO L124 PetriNetUnfolderBase]: 2204/3591 cut-off events. [2024-06-20 15:59:30,305 INFO L125 PetriNetUnfolderBase]: For 232200/232204 co-relation queries the response was YES. [2024-06-20 15:59:30,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28939 conditions, 3591 events. 2204/3591 cut-off events. For 232200/232204 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20647 event pairs, 429 based on Foata normal form. 6/3596 useless extension candidates. Maximal degree in co-relation 28847. Up to 3286 conditions per place. [2024-06-20 15:59:30,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 253 selfloop transitions, 25 changer transitions 0/283 dead transitions. [2024-06-20 15:59:30,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 283 transitions, 3404 flow [2024-06-20 15:59:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 15:59:30,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 15:59:30,344 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 2710 flow. Second operand 8 states and 147 transitions. [2024-06-20 15:59:30,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 283 transitions, 3404 flow [2024-06-20 15:59:30,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 283 transitions, 3273 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:30,622 INFO L231 Difference]: Finished difference. Result has 207 places, 256 transitions, 2692 flow [2024-06-20 15:59:30,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2692, PETRI_PLACES=207, PETRI_TRANSITIONS=256} [2024-06-20 15:59:30,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 15:59:30,623 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 256 transitions, 2692 flow [2024-06-20 15:59:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:30,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:30,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:30,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:59:30,624 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)] === [2024-06-20 15:59:30,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1369919578, now seen corresponding path program 2 times [2024-06-20 15:59:30,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:30,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926565291] [2024-06-20 15:59:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:30,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:31,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926565291] [2024-06-20 15:59:31,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926565291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026899040] [2024-06-20 15:59:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:31,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:31,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:31,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:31,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 256 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:31,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:31,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:31,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:32,276 INFO L124 PetriNetUnfolderBase]: 2212/3603 cut-off events. [2024-06-20 15:59:32,276 INFO L125 PetriNetUnfolderBase]: For 239279/239283 co-relation queries the response was YES. [2024-06-20 15:59:32,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29187 conditions, 3603 events. 2212/3603 cut-off events. For 239279/239283 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20804 event pairs, 538 based on Foata normal form. 6/3608 useless extension candidates. Maximal degree in co-relation 29094. Up to 3335 conditions per place. [2024-06-20 15:59:32,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 26 changer transitions 0/281 dead transitions. [2024-06-20 15:59:32,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 3374 flow [2024-06-20 15:59:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:59:32,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:32,312 INFO L175 Difference]: Start difference. First operand has 207 places, 256 transitions, 2692 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:59:32,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 3374 flow [2024-06-20 15:59:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 281 transitions, 3277 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:32,619 INFO L231 Difference]: Finished difference. Result has 209 places, 258 transitions, 2714 flow [2024-06-20 15:59:32,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2595, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2714, PETRI_PLACES=209, PETRI_TRANSITIONS=258} [2024-06-20 15:59:32,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 15:59:32,620 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 258 transitions, 2714 flow [2024-06-20 15:59:32,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:32,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:32,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:32,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:59:32,620 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)] === [2024-06-20 15:59:32,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1961830714, now seen corresponding path program 1 times [2024-06-20 15:59:32,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:32,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676936509] [2024-06-20 15:59:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:33,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:33,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676936509] [2024-06-20 15:59:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676936509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:33,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322788187] [2024-06-20 15:59:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:33,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:33,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 258 transitions, 2714 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:33,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:33,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:33,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:34,421 INFO L124 PetriNetUnfolderBase]: 2217/3610 cut-off events. [2024-06-20 15:59:34,422 INFO L125 PetriNetUnfolderBase]: For 246302/246306 co-relation queries the response was YES. [2024-06-20 15:59:34,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29425 conditions, 3610 events. 2217/3610 cut-off events. For 246302/246306 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20869 event pairs, 545 based on Foata normal form. 5/3613 useless extension candidates. Maximal degree in co-relation 29331. Up to 3315 conditions per place. [2024-06-20 15:59:34,455 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 33 changer transitions 0/284 dead transitions. [2024-06-20 15:59:34,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 284 transitions, 3430 flow [2024-06-20 15:59:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:59:34,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 15:59:34,456 INFO L175 Difference]: Start difference. First operand has 209 places, 258 transitions, 2714 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:59:34,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 284 transitions, 3430 flow [2024-06-20 15:59:34,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 284 transitions, 3322 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:34,743 INFO L231 Difference]: Finished difference. Result has 211 places, 261 transitions, 2768 flow [2024-06-20 15:59:34,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2768, PETRI_PLACES=211, PETRI_TRANSITIONS=261} [2024-06-20 15:59:34,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 15:59:34,744 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 261 transitions, 2768 flow [2024-06-20 15:59:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:34,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:34,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:34,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:59:34,744 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)] === [2024-06-20 15:59:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1260339352, now seen corresponding path program 3 times [2024-06-20 15:59:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435848190] [2024-06-20 15:59:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435848190] [2024-06-20 15:59:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435848190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:35,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695583259] [2024-06-20 15:59:35,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:35,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:35,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 261 transitions, 2768 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:35,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:35,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:35,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:36,320 INFO L124 PetriNetUnfolderBase]: 2227/3627 cut-off events. [2024-06-20 15:59:36,320 INFO L125 PetriNetUnfolderBase]: For 258194/258198 co-relation queries the response was YES. [2024-06-20 15:59:36,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29977 conditions, 3627 events. 2227/3627 cut-off events. For 258194/258198 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20950 event pairs, 545 based on Foata normal form. 4/3630 useless extension candidates. Maximal degree in co-relation 29882. Up to 3290 conditions per place. [2024-06-20 15:59:36,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2024-06-20 15:59:36,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 286 transitions, 3500 flow [2024-06-20 15:59:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:59:36,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 15:59:36,440 INFO L175 Difference]: Start difference. First operand has 211 places, 261 transitions, 2768 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:59:36,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 286 transitions, 3500 flow [2024-06-20 15:59:36,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 286 transitions, 3360 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:36,723 INFO L231 Difference]: Finished difference. Result has 213 places, 264 transitions, 2816 flow [2024-06-20 15:59:36,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2816, PETRI_PLACES=213, PETRI_TRANSITIONS=264} [2024-06-20 15:59:36,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 15:59:36,724 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 264 transitions, 2816 flow [2024-06-20 15:59:36,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:36,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:36,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:36,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:59:36,724 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)] === [2024-06-20 15:59:36,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1609935324, now seen corresponding path program 4 times [2024-06-20 15:59:36,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:36,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236555057] [2024-06-20 15:59:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236555057] [2024-06-20 15:59:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236555057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:37,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:37,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:37,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133566062] [2024-06-20 15:59:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:37,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:37,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:37,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 264 transitions, 2816 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:37,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:37,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:37,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:38,344 INFO L124 PetriNetUnfolderBase]: 2237/3645 cut-off events. [2024-06-20 15:59:38,344 INFO L125 PetriNetUnfolderBase]: For 271615/271619 co-relation queries the response was YES. [2024-06-20 15:59:38,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30654 conditions, 3645 events. 2237/3645 cut-off events. For 271615/271619 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21152 event pairs, 545 based on Foata normal form. 4/3648 useless extension candidates. Maximal degree in co-relation 30558. Up to 3282 conditions per place. [2024-06-20 15:59:38,380 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 48 changer transitions 0/287 dead transitions. [2024-06-20 15:59:38,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 3558 flow [2024-06-20 15:59:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:59:38,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 15:59:38,382 INFO L175 Difference]: Start difference. First operand has 213 places, 264 transitions, 2816 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:59:38,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 3558 flow [2024-06-20 15:59:38,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 287 transitions, 3389 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:38,722 INFO L231 Difference]: Finished difference. Result has 214 places, 267 transitions, 2857 flow [2024-06-20 15:59:38,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2857, PETRI_PLACES=214, PETRI_TRANSITIONS=267} [2024-06-20 15:59:38,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 15:59:38,722 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 267 transitions, 2857 flow [2024-06-20 15:59:38,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:38,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:38,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:38,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:59:38,723 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)] === [2024-06-20 15:59:38,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1609935696, now seen corresponding path program 1 times [2024-06-20 15:59:38,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:38,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747764712] [2024-06-20 15:59:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:39,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747764712] [2024-06-20 15:59:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747764712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888448756] [2024-06-20 15:59:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:39,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:39,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 2857 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:39,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:39,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:39,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:40,663 INFO L124 PetriNetUnfolderBase]: 2247/3661 cut-off events. [2024-06-20 15:59:40,663 INFO L125 PetriNetUnfolderBase]: For 283451/283457 co-relation queries the response was YES. [2024-06-20 15:59:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31137 conditions, 3661 events. 2247/3661 cut-off events. For 283451/283457 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21194 event pairs, 540 based on Foata normal form. 8/3668 useless extension candidates. Maximal degree in co-relation 31042. Up to 3384 conditions per place. [2024-06-20 15:59:40,701 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 260 selfloop transitions, 27 changer transitions 0/292 dead transitions. [2024-06-20 15:59:40,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 292 transitions, 3589 flow [2024-06-20 15:59:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:59:40,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 15:59:40,703 INFO L175 Difference]: Start difference. First operand has 214 places, 267 transitions, 2857 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:59:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 292 transitions, 3589 flow [2024-06-20 15:59:41,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 292 transitions, 3405 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:41,059 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 2824 flow [2024-06-20 15:59:41,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2824, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2024-06-20 15:59:41,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 15:59:41,060 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 2824 flow [2024-06-20 15:59:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:41,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:41,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:41,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:59:41,061 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)] === [2024-06-20 15:59:41,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1787066844, now seen corresponding path program 5 times [2024-06-20 15:59:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279738383] [2024-06-20 15:59:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:41,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:41,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279738383] [2024-06-20 15:59:41,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279738383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:41,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:41,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319980721] [2024-06-20 15:59:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:41,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:41,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 2824 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:41,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:41,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:41,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:42,624 INFO L124 PetriNetUnfolderBase]: 2289/3726 cut-off events. [2024-06-20 15:59:42,624 INFO L125 PetriNetUnfolderBase]: For 303498/303502 co-relation queries the response was YES. [2024-06-20 15:59:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32598 conditions, 3726 events. 2289/3726 cut-off events. For 303498/303502 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21679 event pairs, 551 based on Foata normal form. 4/3729 useless extension candidates. Maximal degree in co-relation 32502. Up to 3291 conditions per place. [2024-06-20 15:59:42,663 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 67 changer transitions 0/300 dead transitions. [2024-06-20 15:59:42,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 300 transitions, 4068 flow [2024-06-20 15:59:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:59:42,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 15:59:42,664 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 2824 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:59:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 300 transitions, 4068 flow [2024-06-20 15:59:43,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 300 transitions, 3945 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:43,067 INFO L231 Difference]: Finished difference. Result has 218 places, 280 transitions, 3177 flow [2024-06-20 15:59:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3177, PETRI_PLACES=218, PETRI_TRANSITIONS=280} [2024-06-20 15:59:43,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 15:59:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 280 transitions, 3177 flow [2024-06-20 15:59:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:43,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:59:43,068 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)] === [2024-06-20 15:59:43,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1787067216, now seen corresponding path program 2 times [2024-06-20 15:59:43,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054792442] [2024-06-20 15:59:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:43,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:44,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054792442] [2024-06-20 15:59:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054792442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:44,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485663781] [2024-06-20 15:59:44,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:44,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:44,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 280 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:44,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:44,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:44,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:44,842 INFO L124 PetriNetUnfolderBase]: 2299/3741 cut-off events. [2024-06-20 15:59:44,842 INFO L125 PetriNetUnfolderBase]: For 318209/318215 co-relation queries the response was YES. [2024-06-20 15:59:44,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33308 conditions, 3741 events. 2299/3741 cut-off events. For 318209/318215 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21796 event pairs, 542 based on Foata normal form. 8/3748 useless extension candidates. Maximal degree in co-relation 33211. Up to 3439 conditions per place. [2024-06-20 15:59:44,881 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 264 selfloop transitions, 34 changer transitions 0/303 dead transitions. [2024-06-20 15:59:44,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 303 transitions, 3947 flow [2024-06-20 15:59:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:59:44,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:44,882 INFO L175 Difference]: Start difference. First operand has 218 places, 280 transitions, 3177 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:59:44,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 303 transitions, 3947 flow [2024-06-20 15:59:45,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 303 transitions, 3790 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-20 15:59:45,298 INFO L231 Difference]: Finished difference. Result has 223 places, 284 transitions, 3195 flow [2024-06-20 15:59:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=223, PETRI_TRANSITIONS=284} [2024-06-20 15:59:45,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-20 15:59:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 284 transitions, 3195 flow [2024-06-20 15:59:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:45,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:45,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:59:45,300 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)] === [2024-06-20 15:59:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1787304366, now seen corresponding path program 3 times [2024-06-20 15:59:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991838666] [2024-06-20 15:59:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:46,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991838666] [2024-06-20 15:59:46,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991838666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:46,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701563050] [2024-06-20 15:59:46,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:46,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:46,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:46,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 284 transitions, 3195 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:46,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:46,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:47,247 INFO L124 PetriNetUnfolderBase]: 2320/3772 cut-off events. [2024-06-20 15:59:47,248 INFO L125 PetriNetUnfolderBase]: For 330466/330472 co-relation queries the response was YES. [2024-06-20 15:59:47,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34248 conditions, 3772 events. 2320/3772 cut-off events. For 330466/330472 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21988 event pairs, 542 based on Foata normal form. 7/3778 useless extension candidates. Maximal degree in co-relation 34149. Up to 3448 conditions per place. [2024-06-20 15:59:47,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 46 changer transitions 0/312 dead transitions. [2024-06-20 15:59:47,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 312 transitions, 4166 flow [2024-06-20 15:59:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:59:47,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 15:59:47,289 INFO L175 Difference]: Start difference. First operand has 223 places, 284 transitions, 3195 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:59:47,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 312 transitions, 4166 flow [2024-06-20 15:59:47,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 312 transitions, 4019 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:47,698 INFO L231 Difference]: Finished difference. Result has 226 places, 293 transitions, 3341 flow [2024-06-20 15:59:47,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3341, PETRI_PLACES=226, PETRI_TRANSITIONS=293} [2024-06-20 15:59:47,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 15:59:47,699 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 293 transitions, 3341 flow [2024-06-20 15:59:47,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:47,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:47,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:47,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:59:47,700 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)] === [2024-06-20 15:59:47,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1489950370, now seen corresponding path program 6 times [2024-06-20 15:59:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:47,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656408929] [2024-06-20 15:59:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:48,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656408929] [2024-06-20 15:59:48,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656408929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:48,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:48,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552882880] [2024-06-20 15:59:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:48,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:48,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:48,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 293 transitions, 3341 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:48,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:48,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:48,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:49,511 INFO L124 PetriNetUnfolderBase]: 2314/3761 cut-off events. [2024-06-20 15:59:49,511 INFO L125 PetriNetUnfolderBase]: For 342818/342820 co-relation queries the response was YES. [2024-06-20 15:59:49,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34784 conditions, 3761 events. 2314/3761 cut-off events. For 342818/342820 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21829 event pairs, 545 based on Foata normal form. 2/3762 useless extension candidates. Maximal degree in co-relation 34683. Up to 3469 conditions per place. [2024-06-20 15:59:49,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 31 changer transitions 0/309 dead transitions. [2024-06-20 15:59:49,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 4011 flow [2024-06-20 15:59:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 15:59:49,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 15:59:49,644 INFO L175 Difference]: Start difference. First operand has 226 places, 293 transitions, 3341 flow. Second operand 8 states and 141 transitions. [2024-06-20 15:59:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 4011 flow [2024-06-20 15:59:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 309 transitions, 3832 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-20 15:59:49,974 INFO L231 Difference]: Finished difference. Result has 230 places, 293 transitions, 3230 flow [2024-06-20 15:59:49,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3230, PETRI_PLACES=230, PETRI_TRANSITIONS=293} [2024-06-20 15:59:49,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 15:59:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 293 transitions, 3230 flow [2024-06-20 15:59:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:49,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:49,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:49,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:59:49,976 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)] === [2024-06-20 15:59:49,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1083032248, now seen corresponding path program 3 times [2024-06-20 15:59:49,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:49,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791248924] [2024-06-20 15:59:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:49,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791248924] [2024-06-20 15:59:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791248924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:50,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440043134] [2024-06-20 15:59:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:50,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:50,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 293 transitions, 3230 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:50,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:50,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:50,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:51,615 INFO L124 PetriNetUnfolderBase]: 2322/3773 cut-off events. [2024-06-20 15:59:51,615 INFO L125 PetriNetUnfolderBase]: For 351104/351106 co-relation queries the response was YES. [2024-06-20 15:59:51,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34957 conditions, 3773 events. 2322/3773 cut-off events. For 351104/351106 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22005 event pairs, 545 based on Foata normal form. 2/3774 useless extension candidates. Maximal degree in co-relation 34854. Up to 3481 conditions per place. [2024-06-20 15:59:51,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 276 selfloop transitions, 30 changer transitions 0/311 dead transitions. [2024-06-20 15:59:51,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 311 transitions, 3956 flow [2024-06-20 15:59:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 15:59:51,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 15:59:51,659 INFO L175 Difference]: Start difference. First operand has 230 places, 293 transitions, 3230 flow. Second operand 8 states and 140 transitions. [2024-06-20 15:59:51,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 311 transitions, 3956 flow [2024-06-20 15:59:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 311 transitions, 3840 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:52,034 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 3253 flow [2024-06-20 15:59:52,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3253, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-06-20 15:59:52,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 15:59:52,035 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 3253 flow [2024-06-20 15:59:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:52,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:52,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:52,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:59:52,035 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)] === [2024-06-20 15:59:52,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1459505570, now seen corresponding path program 2 times [2024-06-20 15:59:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:52,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90180512] [2024-06-20 15:59:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:52,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90180512] [2024-06-20 15:59:52,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90180512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:52,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:52,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:52,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169919461] [2024-06-20 15:59:52,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:52,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:52,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:53,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:53,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 3253 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:53,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:53,823 INFO L124 PetriNetUnfolderBase]: 2327/3783 cut-off events. [2024-06-20 15:59:53,823 INFO L125 PetriNetUnfolderBase]: For 358959/358965 co-relation queries the response was YES. [2024-06-20 15:59:53,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35260 conditions, 3783 events. 2327/3783 cut-off events. For 358959/358965 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22051 event pairs, 546 based on Foata normal form. 7/3789 useless extension candidates. Maximal degree in co-relation 35158. Up to 3469 conditions per place. [2024-06-20 15:59:53,864 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 32 changer transitions 0/319 dead transitions. [2024-06-20 15:59:53,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 319 transitions, 4065 flow [2024-06-20 15:59:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 15:59:53,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 15:59:53,865 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 3253 flow. Second operand 8 states and 145 transitions. [2024-06-20 15:59:53,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 319 transitions, 4065 flow [2024-06-20 15:59:54,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 319 transitions, 3942 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:54,268 INFO L231 Difference]: Finished difference. Result has 232 places, 298 transitions, 3322 flow [2024-06-20 15:59:54,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3322, PETRI_PLACES=232, PETRI_TRANSITIONS=298} [2024-06-20 15:59:54,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 15:59:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 298 transitions, 3322 flow [2024-06-20 15:59:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:54,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:54,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:59:54,269 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:54,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1459326824, now seen corresponding path program 7 times [2024-06-20 15:59:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167856690] [2024-06-20 15:59:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:54,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:54,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167856690] [2024-06-20 15:59:54,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167856690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:54,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:54,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:54,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964707463] [2024-06-20 15:59:54,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:54,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:54,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:55,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:55,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 298 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:55,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:55,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:55,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:55,896 INFO L124 PetriNetUnfolderBase]: 2337/3798 cut-off events. [2024-06-20 15:59:55,896 INFO L125 PetriNetUnfolderBase]: For 374164/374166 co-relation queries the response was YES. [2024-06-20 15:59:55,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35819 conditions, 3798 events. 2337/3798 cut-off events. For 374164/374166 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22098 event pairs, 557 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 35716. Up to 3444 conditions per place. [2024-06-20 15:59:55,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 39 changer transitions 0/321 dead transitions. [2024-06-20 15:59:55,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 321 transitions, 4136 flow [2024-06-20 15:59:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:59:55,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 15:59:55,943 INFO L175 Difference]: Start difference. First operand has 232 places, 298 transitions, 3322 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:59:55,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 321 transitions, 4136 flow [2024-06-20 15:59:56,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 3966 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:56,325 INFO L231 Difference]: Finished difference. Result has 234 places, 301 transitions, 3348 flow [2024-06-20 15:59:56,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3348, PETRI_PLACES=234, PETRI_TRANSITIONS=301} [2024-06-20 15:59:56,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 15:59:56,325 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 301 transitions, 3348 flow [2024-06-20 15:59:56,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:56,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:56,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:56,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:59:56,326 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)] === [2024-06-20 15:59:56,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1687406720, now seen corresponding path program 3 times [2024-06-20 15:59:56,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:56,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973135782] [2024-06-20 15:59:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973135782] [2024-06-20 15:59:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973135782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755458566] [2024-06-20 15:59:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:57,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:57,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:57,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 301 transitions, 3348 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:57,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:57,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:57,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:58,251 INFO L124 PetriNetUnfolderBase]: 2342/3808 cut-off events. [2024-06-20 15:59:58,251 INFO L125 PetriNetUnfolderBase]: For 381611/381617 co-relation queries the response was YES. [2024-06-20 15:59:58,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36046 conditions, 3808 events. 2342/3808 cut-off events. For 381611/381617 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22200 event pairs, 548 based on Foata normal form. 7/3814 useless extension candidates. Maximal degree in co-relation 35942. Up to 3490 conditions per place. [2024-06-20 15:59:58,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 287 selfloop transitions, 33 changer transitions 0/325 dead transitions. [2024-06-20 15:59:58,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 325 transitions, 4178 flow [2024-06-20 15:59:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 15:59:58,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 15:59:58,293 INFO L175 Difference]: Start difference. First operand has 234 places, 301 transitions, 3348 flow. Second operand 8 states and 144 transitions. [2024-06-20 15:59:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 325 transitions, 4178 flow [2024-06-20 15:59:58,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 325 transitions, 3962 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:58,709 INFO L231 Difference]: Finished difference. Result has 234 places, 304 transitions, 3332 flow [2024-06-20 15:59:58,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3332, PETRI_PLACES=234, PETRI_TRANSITIONS=304} [2024-06-20 15:59:58,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 15:59:58,709 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 304 transitions, 3332 flow [2024-06-20 15:59:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:58,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:59:58,710 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:58,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1337152190, now seen corresponding path program 8 times [2024-06-20 15:59:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599658825] [2024-06-20 15:59:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599658825] [2024-06-20 15:59:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599658825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:59,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:59:59,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115289212] [2024-06-20 15:59:59,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:59,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:59:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:59:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:59:59,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:59,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 304 transitions, 3332 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:59,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:59,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:59,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:00,445 INFO L124 PetriNetUnfolderBase]: 2336/3797 cut-off events. [2024-06-20 16:00:00,445 INFO L125 PetriNetUnfolderBase]: For 390849/390851 co-relation queries the response was YES. [2024-06-20 16:00:00,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36031 conditions, 3797 events. 2336/3797 cut-off events. For 390849/390851 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22142 event pairs, 554 based on Foata normal form. 2/3797 useless extension candidates. Maximal degree in co-relation 35926. Up to 3429 conditions per place. [2024-06-20 16:00:00,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 44 changer transitions 0/322 dead transitions. [2024-06-20 16:00:00,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4052 flow [2024-06-20 16:00:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:00:00,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:00:00,482 INFO L175 Difference]: Start difference. First operand has 234 places, 304 transitions, 3332 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:00:00,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4052 flow [2024-06-20 16:00:00,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 322 transitions, 3820 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:00,946 INFO L231 Difference]: Finished difference. Result has 236 places, 304 transitions, 3194 flow [2024-06-20 16:00:00,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3194, PETRI_PLACES=236, PETRI_TRANSITIONS=304} [2024-06-20 16:00:00,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-20 16:00:00,946 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 304 transitions, 3194 flow [2024-06-20 16:00:00,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:00,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:00,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:00,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:00:00,947 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:00,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash 22788214, now seen corresponding path program 4 times [2024-06-20 16:00:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:00,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410174357] [2024-06-20 16:00:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:00,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410174357] [2024-06-20 16:00:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410174357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:01,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372282580] [2024-06-20 16:00:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:01,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:01,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 304 transitions, 3194 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:01,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:01,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:01,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:02,682 INFO L124 PetriNetUnfolderBase]: 2330/3792 cut-off events. [2024-06-20 16:00:02,682 INFO L125 PetriNetUnfolderBase]: For 393240/393246 co-relation queries the response was YES. [2024-06-20 16:00:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35816 conditions, 3792 events. 2330/3792 cut-off events. For 393240/393246 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22120 event pairs, 545 based on Foata normal form. 8/3799 useless extension candidates. Maximal degree in co-relation 35710. Up to 3501 conditions per place. [2024-06-20 16:00:02,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 26 changer transitions 0/324 dead transitions. [2024-06-20 16:00:02,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 324 transitions, 3933 flow [2024-06-20 16:00:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:02,824 INFO L175 Difference]: Start difference. First operand has 236 places, 304 transitions, 3194 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:02,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 324 transitions, 3933 flow [2024-06-20 16:00:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 324 transitions, 3709 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:03,191 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3054 flow [2024-06-20 16:00:03,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3054, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-20 16:00:03,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 16:00:03,192 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3054 flow [2024-06-20 16:00:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:03,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:03,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:00:03,192 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)] === [2024-06-20 16:00:03,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1097942984, now seen corresponding path program 4 times [2024-06-20 16:00:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449509718] [2024-06-20 16:00:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449509718] [2024-06-20 16:00:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449509718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096609256] [2024-06-20 16:00:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:04,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:04,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3054 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:04,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:04,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:04,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:05,027 INFO L124 PetriNetUnfolderBase]: 2327/3788 cut-off events. [2024-06-20 16:00:05,027 INFO L125 PetriNetUnfolderBase]: For 396170/396176 co-relation queries the response was YES. [2024-06-20 16:00:05,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35594 conditions, 3788 events. 2327/3788 cut-off events. For 396170/396176 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22130 event pairs, 547 based on Foata normal form. 7/3794 useless extension candidates. Maximal degree in co-relation 35487. Up to 3458 conditions per place. [2024-06-20 16:00:05,071 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 44 changer transitions 0/326 dead transitions. [2024-06-20 16:00:05,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 326 transitions, 3882 flow [2024-06-20 16:00:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:05,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:05,072 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3054 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:05,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 326 transitions, 3882 flow [2024-06-20 16:00:05,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 326 transitions, 3815 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:05,790 INFO L231 Difference]: Finished difference. Result has 239 places, 308 transitions, 3215 flow [2024-06-20 16:00:05,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3215, PETRI_PLACES=239, PETRI_TRANSITIONS=308} [2024-06-20 16:00:05,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 16:00:05,791 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 308 transitions, 3215 flow [2024-06-20 16:00:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:05,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:05,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:05,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:00:05,791 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)] === [2024-06-20 16:00:05,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1813888766, now seen corresponding path program 5 times [2024-06-20 16:00:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884492593] [2024-06-20 16:00:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884492593] [2024-06-20 16:00:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884492593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:06,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:06,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900710170] [2024-06-20 16:00:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:06,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:06,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 308 transitions, 3215 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:06,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:06,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:07,678 INFO L124 PetriNetUnfolderBase]: 2337/3802 cut-off events. [2024-06-20 16:00:07,678 INFO L125 PetriNetUnfolderBase]: For 413330/413336 co-relation queries the response was YES. [2024-06-20 16:00:07,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36241 conditions, 3802 events. 2337/3802 cut-off events. For 413330/413336 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22167 event pairs, 541 based on Foata normal form. 8/3809 useless extension candidates. Maximal degree in co-relation 36133. Up to 3491 conditions per place. [2024-06-20 16:00:07,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 34 changer transitions 0/329 dead transitions. [2024-06-20 16:00:07,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 329 transitions, 4073 flow [2024-06-20 16:00:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:07,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:07,722 INFO L175 Difference]: Start difference. First operand has 239 places, 308 transitions, 3215 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 329 transitions, 4073 flow [2024-06-20 16:00:08,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 3867 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:08,290 INFO L231 Difference]: Finished difference. Result has 241 places, 312 transitions, 3214 flow [2024-06-20 16:00:08,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3214, PETRI_PLACES=241, PETRI_TRANSITIONS=312} [2024-06-20 16:00:08,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-20 16:00:08,291 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 312 transitions, 3214 flow [2024-06-20 16:00:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:00:08,291 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)] === [2024-06-20 16:00:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1813888394, now seen corresponding path program 9 times [2024-06-20 16:00:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097515058] [2024-06-20 16:00:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097515058] [2024-06-20 16:00:09,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097515058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:09,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805609863] [2024-06-20 16:00:09,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:09,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:09,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:09,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 312 transitions, 3214 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:09,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:09,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:09,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:10,023 INFO L124 PetriNetUnfolderBase]: 2347/3817 cut-off events. [2024-06-20 16:00:10,023 INFO L125 PetriNetUnfolderBase]: For 428249/428251 co-relation queries the response was YES. [2024-06-20 16:00:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36975 conditions, 3817 events. 2347/3817 cut-off events. For 428249/428251 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22279 event pairs, 554 based on Foata normal form. 2/3817 useless extension candidates. Maximal degree in co-relation 36866. Up to 3395 conditions per place. [2024-06-20 16:00:10,067 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 264 selfloop transitions, 62 changer transitions 0/331 dead transitions. [2024-06-20 16:00:10,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 331 transitions, 4104 flow [2024-06-20 16:00:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:00:10,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:00:10,068 INFO L175 Difference]: Start difference. First operand has 241 places, 312 transitions, 3214 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:00:10,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 331 transitions, 4104 flow [2024-06-20 16:00:10,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 331 transitions, 3927 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:10,641 INFO L231 Difference]: Finished difference. Result has 243 places, 315 transitions, 3309 flow [2024-06-20 16:00:10,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3309, PETRI_PLACES=243, PETRI_TRANSITIONS=315} [2024-06-20 16:00:10,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 16:00:10,642 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 315 transitions, 3309 flow [2024-06-20 16:00:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:10,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:10,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:00:10,642 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)] === [2024-06-20 16:00:10,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1814304476, now seen corresponding path program 6 times [2024-06-20 16:00:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778480184] [2024-06-20 16:00:10,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778480184] [2024-06-20 16:00:11,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778480184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:11,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:11,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761544115] [2024-06-20 16:00:11,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:11,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:11,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:11,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 315 transitions, 3309 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:11,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:11,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:12,616 INFO L124 PetriNetUnfolderBase]: 2357/3832 cut-off events. [2024-06-20 16:00:12,616 INFO L125 PetriNetUnfolderBase]: For 444236/444242 co-relation queries the response was YES. [2024-06-20 16:00:12,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37643 conditions, 3832 events. 2357/3832 cut-off events. For 444236/444242 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22385 event pairs, 541 based on Foata normal form. 8/3839 useless extension candidates. Maximal degree in co-relation 37533. Up to 3495 conditions per place. [2024-06-20 16:00:12,660 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 49 changer transitions 0/339 dead transitions. [2024-06-20 16:00:12,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 339 transitions, 4227 flow [2024-06-20 16:00:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:12,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:12,661 INFO L175 Difference]: Start difference. First operand has 243 places, 315 transitions, 3309 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:12,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 339 transitions, 4227 flow [2024-06-20 16:00:13,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 339 transitions, 3989 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:13,139 INFO L231 Difference]: Finished difference. Result has 246 places, 323 transitions, 3390 flow [2024-06-20 16:00:13,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3390, PETRI_PLACES=246, PETRI_TRANSITIONS=323} [2024-06-20 16:00:13,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-20 16:00:13,140 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 323 transitions, 3390 flow [2024-06-20 16:00:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:13,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:13,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:00:13,141 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)] === [2024-06-20 16:00:13,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 758746432, now seen corresponding path program 7 times [2024-06-20 16:00:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636844] [2024-06-20 16:00:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:14,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636844] [2024-06-20 16:00:14,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:14,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:14,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:14,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736788016] [2024-06-20 16:00:14,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:14,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:14,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:14,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:14,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 323 transitions, 3390 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:15,072 INFO L124 PetriNetUnfolderBase]: 2383/3871 cut-off events. [2024-06-20 16:00:15,072 INFO L125 PetriNetUnfolderBase]: For 467013/467021 co-relation queries the response was YES. [2024-06-20 16:00:15,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38746 conditions, 3871 events. 2383/3871 cut-off events. For 467013/467021 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22714 event pairs, 549 based on Foata normal form. 10/3880 useless extension candidates. Maximal degree in co-relation 38634. Up to 3494 conditions per place. [2024-06-20 16:00:15,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 60 changer transitions 0/349 dead transitions. [2024-06-20 16:00:15,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 349 transitions, 4626 flow [2024-06-20 16:00:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:00:15,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:00:15,121 INFO L175 Difference]: Start difference. First operand has 246 places, 323 transitions, 3390 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:00:15,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 349 transitions, 4626 flow [2024-06-20 16:00:15,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4460 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:15,717 INFO L231 Difference]: Finished difference. Result has 251 places, 334 transitions, 3696 flow [2024-06-20 16:00:15,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3696, PETRI_PLACES=251, PETRI_TRANSITIONS=334} [2024-06-20 16:00:15,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-20 16:00:15,718 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 334 transitions, 3696 flow [2024-06-20 16:00:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:15,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:15,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:15,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:00:15,718 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:15,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1197512232, now seen corresponding path program 8 times [2024-06-20 16:00:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216668304] [2024-06-20 16:00:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216668304] [2024-06-20 16:00:16,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216668304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:16,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:16,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985651817] [2024-06-20 16:00:16,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:16,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:16,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:16,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 334 transitions, 3696 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:16,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:16,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:16,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:17,686 INFO L124 PetriNetUnfolderBase]: 2393/3885 cut-off events. [2024-06-20 16:00:17,686 INFO L125 PetriNetUnfolderBase]: For 486083/486091 co-relation queries the response was YES. [2024-06-20 16:00:17,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39791 conditions, 3885 events. 2393/3885 cut-off events. For 486083/486091 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22749 event pairs, 551 based on Foata normal form. 10/3894 useless extension candidates. Maximal degree in co-relation 39676. Up to 3532 conditions per place. [2024-06-20 16:00:17,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 298 selfloop transitions, 50 changer transitions 0/353 dead transitions. [2024-06-20 16:00:17,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 353 transitions, 4666 flow [2024-06-20 16:00:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:17,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:17,729 INFO L175 Difference]: Start difference. First operand has 251 places, 334 transitions, 3696 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:17,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 353 transitions, 4666 flow [2024-06-20 16:00:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 353 transitions, 4435 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:18,305 INFO L231 Difference]: Finished difference. Result has 255 places, 338 transitions, 3732 flow [2024-06-20 16:00:18,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3732, PETRI_PLACES=255, PETRI_TRANSITIONS=338} [2024-06-20 16:00:18,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-20 16:00:18,306 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 338 transitions, 3732 flow [2024-06-20 16:00:18,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:18,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:18,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:18,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:00:18,306 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)] === [2024-06-20 16:00:18,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 466904506, now seen corresponding path program 9 times [2024-06-20 16:00:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:18,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900437509] [2024-06-20 16:00:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:18,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:19,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900437509] [2024-06-20 16:00:19,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900437509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:19,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:19,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115520804] [2024-06-20 16:00:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:19,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:19,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 338 transitions, 3732 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:19,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:19,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:19,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:20,080 INFO L124 PetriNetUnfolderBase]: 2398/3896 cut-off events. [2024-06-20 16:00:20,080 INFO L125 PetriNetUnfolderBase]: For 491376/491384 co-relation queries the response was YES. [2024-06-20 16:00:20,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39934 conditions, 3896 events. 2398/3896 cut-off events. For 491376/491384 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22892 event pairs, 545 based on Foata normal form. 9/3904 useless extension candidates. Maximal degree in co-relation 39817. Up to 3456 conditions per place. [2024-06-20 16:00:20,125 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 100 changer transitions 0/366 dead transitions. [2024-06-20 16:00:20,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 366 transitions, 5075 flow [2024-06-20 16:00:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:00:20,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:00:20,126 INFO L175 Difference]: Start difference. First operand has 255 places, 338 transitions, 3732 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:00:20,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 366 transitions, 5075 flow [2024-06-20 16:00:20,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 366 transitions, 4870 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:20,896 INFO L231 Difference]: Finished difference. Result has 259 places, 351 transitions, 4074 flow [2024-06-20 16:00:20,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4074, PETRI_PLACES=259, PETRI_TRANSITIONS=351} [2024-06-20 16:00:20,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-20 16:00:20,896 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 351 transitions, 4074 flow [2024-06-20 16:00:20,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:20,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:20,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:20,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:00:20,897 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)] === [2024-06-20 16:00:20,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1197511860, now seen corresponding path program 10 times [2024-06-20 16:00:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518670251] [2024-06-20 16:00:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:21,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518670251] [2024-06-20 16:00:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518670251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:21,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:21,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099191712] [2024-06-20 16:00:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:21,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:21,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:21,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 351 transitions, 4074 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:21,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:21,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:22,562 INFO L124 PetriNetUnfolderBase]: 2416/3925 cut-off events. [2024-06-20 16:00:22,563 INFO L125 PetriNetUnfolderBase]: For 515528/515532 co-relation queries the response was YES. [2024-06-20 16:00:22,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41281 conditions, 3925 events. 2416/3925 cut-off events. For 515528/515532 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23030 event pairs, 578 based on Foata normal form. 4/3927 useless extension candidates. Maximal degree in co-relation 41161. Up to 3400 conditions per place. [2024-06-20 16:00:22,611 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 94 changer transitions 0/372 dead transitions. [2024-06-20 16:00:22,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 372 transitions, 5408 flow [2024-06-20 16:00:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:00:22,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:00:22,612 INFO L175 Difference]: Start difference. First operand has 259 places, 351 transitions, 4074 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:00:22,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 372 transitions, 5408 flow [2024-06-20 16:00:23,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 372 transitions, 5212 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:23,493 INFO L231 Difference]: Finished difference. Result has 263 places, 357 transitions, 4370 flow [2024-06-20 16:00:23,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4370, PETRI_PLACES=263, PETRI_TRANSITIONS=357} [2024-06-20 16:00:23,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 16:00:23,494 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 357 transitions, 4370 flow [2024-06-20 16:00:23,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:23,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:23,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:23,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:00:23,495 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)] === [2024-06-20 16:00:23,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash 980933662, now seen corresponding path program 10 times [2024-06-20 16:00:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108800484] [2024-06-20 16:00:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:24,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:24,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108800484] [2024-06-20 16:00:24,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108800484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:24,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:24,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589132045] [2024-06-20 16:00:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:24,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:24,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:24,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:24,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 357 transitions, 4370 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:24,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:24,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:24,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:25,299 INFO L124 PetriNetUnfolderBase]: 2421/3934 cut-off events. [2024-06-20 16:00:25,299 INFO L125 PetriNetUnfolderBase]: For 528013/528021 co-relation queries the response was YES. [2024-06-20 16:00:25,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41706 conditions, 3934 events. 2421/3934 cut-off events. For 528013/528021 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23159 event pairs, 546 based on Foata normal form. 9/3942 useless extension candidates. Maximal degree in co-relation 41585. Up to 3487 conditions per place. [2024-06-20 16:00:25,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 104 changer transitions 0/375 dead transitions. [2024-06-20 16:00:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 375 transitions, 5444 flow [2024-06-20 16:00:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:00:25,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:00:25,347 INFO L175 Difference]: Start difference. First operand has 263 places, 357 transitions, 4370 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:00:25,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 375 transitions, 5444 flow [2024-06-20 16:00:26,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 375 transitions, 5213 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:26,088 INFO L231 Difference]: Finished difference. Result has 267 places, 361 transitions, 4461 flow [2024-06-20 16:00:26,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4461, PETRI_PLACES=267, PETRI_TRANSITIONS=361} [2024-06-20 16:00:26,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-20 16:00:26,089 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 361 transitions, 4461 flow [2024-06-20 16:00:26,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:26,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:26,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:26,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:00:26,090 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)] === [2024-06-20 16:00:26,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash 581199202, now seen corresponding path program 11 times [2024-06-20 16:00:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038140038] [2024-06-20 16:00:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038140038] [2024-06-20 16:00:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038140038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005571722] [2024-06-20 16:00:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:27,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:27,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:27,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 361 transitions, 4461 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:27,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:27,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:27,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:28,094 INFO L124 PetriNetUnfolderBase]: 2415/3924 cut-off events. [2024-06-20 16:00:28,094 INFO L125 PetriNetUnfolderBase]: For 524510/524518 co-relation queries the response was YES. [2024-06-20 16:00:28,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41254 conditions, 3924 events. 2415/3924 cut-off events. For 524510/524518 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23039 event pairs, 542 based on Foata normal form. 10/3933 useless extension candidates. Maximal degree in co-relation 41131. Up to 3563 conditions per place. [2024-06-20 16:00:28,139 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 50 changer transitions 0/377 dead transitions. [2024-06-20 16:00:28,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 377 transitions, 5361 flow [2024-06-20 16:00:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:28,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:28,141 INFO L175 Difference]: Start difference. First operand has 267 places, 361 transitions, 4461 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:28,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 377 transitions, 5361 flow [2024-06-20 16:00:28,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 377 transitions, 5032 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:28,951 INFO L231 Difference]: Finished difference. Result has 271 places, 362 transitions, 4263 flow [2024-06-20 16:00:28,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4263, PETRI_PLACES=271, PETRI_TRANSITIONS=362} [2024-06-20 16:00:28,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 16:00:28,952 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 362 transitions, 4263 flow [2024-06-20 16:00:28,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:28,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:28,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:28,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:00:28,952 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)] === [2024-06-20 16:00:28,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:28,953 INFO L85 PathProgramCache]: Analyzing trace with hash 581436352, now seen corresponding path program 12 times [2024-06-20 16:00:28,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:28,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071985404] [2024-06-20 16:00:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:28,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071985404] [2024-06-20 16:00:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071985404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:30,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502491219] [2024-06-20 16:00:30,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:30,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:30,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:30,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 362 transitions, 4263 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:30,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:30,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:30,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:31,010 INFO L124 PetriNetUnfolderBase]: 2412/3916 cut-off events. [2024-06-20 16:00:31,010 INFO L125 PetriNetUnfolderBase]: For 526314/526322 co-relation queries the response was YES. [2024-06-20 16:00:31,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40951 conditions, 3916 events. 2412/3916 cut-off events. For 526314/526322 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22960 event pairs, 540 based on Foata normal form. 9/3924 useless extension candidates. Maximal degree in co-relation 40827. Up to 3541 conditions per place. [2024-06-20 16:00:31,057 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 63 changer transitions 0/377 dead transitions. [2024-06-20 16:00:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 377 transitions, 5125 flow [2024-06-20 16:00:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:31,058 INFO L175 Difference]: Start difference. First operand has 271 places, 362 transitions, 4263 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 377 transitions, 5125 flow [2024-06-20 16:00:31,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 377 transitions, 4942 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:31,978 INFO L231 Difference]: Finished difference. Result has 273 places, 363 transitions, 4230 flow [2024-06-20 16:00:31,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4230, PETRI_PLACES=273, PETRI_TRANSITIONS=363} [2024-06-20 16:00:31,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 16:00:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 363 transitions, 4230 flow [2024-06-20 16:00:31,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:31,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:31,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:31,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:00:31,979 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:31,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 61455754, now seen corresponding path program 11 times [2024-06-20 16:00:31,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:31,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386161248] [2024-06-20 16:00:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:31,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386161248] [2024-06-20 16:00:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386161248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:32,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:32,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843755459] [2024-06-20 16:00:32,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:32,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:32,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:32,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 363 transitions, 4230 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:32,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:32,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:33,677 INFO L124 PetriNetUnfolderBase]: 2422/3928 cut-off events. [2024-06-20 16:00:33,677 INFO L125 PetriNetUnfolderBase]: For 541626/541630 co-relation queries the response was YES. [2024-06-20 16:00:33,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41297 conditions, 3928 events. 2422/3928 cut-off events. For 541626/541630 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22968 event pairs, 570 based on Foata normal form. 4/3930 useless extension candidates. Maximal degree in co-relation 41172. Up to 3405 conditions per place. [2024-06-20 16:00:33,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 95 changer transitions 0/381 dead transitions. [2024-06-20 16:00:33,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 381 transitions, 5438 flow [2024-06-20 16:00:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:00:33,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:00:33,729 INFO L175 Difference]: Start difference. First operand has 273 places, 363 transitions, 4230 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:00:33,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 381 transitions, 5438 flow [2024-06-20 16:00:34,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 381 transitions, 5321 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:34,504 INFO L231 Difference]: Finished difference. Result has 276 places, 366 transitions, 4449 flow [2024-06-20 16:00:34,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4449, PETRI_PLACES=276, PETRI_TRANSITIONS=366} [2024-06-20 16:00:34,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 16:00:34,505 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 366 transitions, 4449 flow [2024-06-20 16:00:34,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:34,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:34,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:34,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:00:34,505 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)] === [2024-06-20 16:00:34,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash 581078860, now seen corresponding path program 12 times [2024-06-20 16:00:34,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:34,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139127129] [2024-06-20 16:00:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:34,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139127129] [2024-06-20 16:00:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139127129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:35,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79441475] [2024-06-20 16:00:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:35,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:35,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 366 transitions, 4449 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:35,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:35,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:35,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:36,335 INFO L124 PetriNetUnfolderBase]: 2416/3916 cut-off events. [2024-06-20 16:00:36,335 INFO L125 PetriNetUnfolderBase]: For 545961/545963 co-relation queries the response was YES. [2024-06-20 16:00:36,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41258 conditions, 3916 events. 2416/3916 cut-off events. For 545961/545963 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22827 event pairs, 552 based on Foata normal form. 2/3916 useless extension candidates. Maximal degree in co-relation 41132. Up to 3605 conditions per place. [2024-06-20 16:00:36,386 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 37 changer transitions 0/377 dead transitions. [2024-06-20 16:00:36,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 377 transitions, 5251 flow [2024-06-20 16:00:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:00:36,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 16:00:36,387 INFO L175 Difference]: Start difference. First operand has 276 places, 366 transitions, 4449 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:00:36,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 377 transitions, 5251 flow [2024-06-20 16:00:37,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 377 transitions, 4772 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:37,275 INFO L231 Difference]: Finished difference. Result has 277 places, 366 transitions, 4050 flow [2024-06-20 16:00:37,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4050, PETRI_PLACES=277, PETRI_TRANSITIONS=366} [2024-06-20 16:00:37,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 16:00:37,276 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 366 transitions, 4050 flow [2024-06-20 16:00:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:37,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:37,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:00:37,276 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 61332808, now seen corresponding path program 4 times [2024-06-20 16:00:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250031843] [2024-06-20 16:00:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:38,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:38,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250031843] [2024-06-20 16:00:38,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250031843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:38,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:38,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:38,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560896540] [2024-06-20 16:00:38,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:38,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:38,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:38,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 366 transitions, 4050 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:38,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:38,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:39,018 INFO L124 PetriNetUnfolderBase]: 2411/3909 cut-off events. [2024-06-20 16:00:39,019 INFO L125 PetriNetUnfolderBase]: For 545407/545409 co-relation queries the response was YES. [2024-06-20 16:00:39,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40395 conditions, 3909 events. 2411/3909 cut-off events. For 545407/545409 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22871 event pairs, 551 based on Foata normal form. 2/3909 useless extension candidates. Maximal degree in co-relation 40269. Up to 3598 conditions per place. [2024-06-20 16:00:39,064 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 338 selfloop transitions, 36 changer transitions 0/379 dead transitions. [2024-06-20 16:00:39,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 379 transitions, 4908 flow [2024-06-20 16:00:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:00:39,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:00:39,066 INFO L175 Difference]: Start difference. First operand has 277 places, 366 transitions, 4050 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:00:39,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 379 transitions, 4908 flow [2024-06-20 16:00:39,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 379 transitions, 4771 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 16:00:39,870 INFO L231 Difference]: Finished difference. Result has 276 places, 368 transitions, 4076 flow [2024-06-20 16:00:39,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4076, PETRI_PLACES=276, PETRI_TRANSITIONS=368} [2024-06-20 16:00:39,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 16:00:39,870 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 368 transitions, 4076 flow [2024-06-20 16:00:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:39,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:39,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:00:39,871 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:39,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1205152740, now seen corresponding path program 1 times [2024-06-20 16:00:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615946766] [2024-06-20 16:00:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:41,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:41,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615946766] [2024-06-20 16:00:41,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615946766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:41,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:41,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:00:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455815188] [2024-06-20 16:00:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:00:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:00:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:00:41,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:41,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 368 transitions, 4076 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:41,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:41,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:41,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:42,350 INFO L124 PetriNetUnfolderBase]: 2244/3688 cut-off events. [2024-06-20 16:00:42,350 INFO L125 PetriNetUnfolderBase]: For 540543/540553 co-relation queries the response was YES. [2024-06-20 16:00:42,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38611 conditions, 3688 events. 2244/3688 cut-off events. For 540543/540553 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21850 event pairs, 510 based on Foata normal form. 10/3658 useless extension candidates. Maximal degree in co-relation 38485. Up to 3286 conditions per place. [2024-06-20 16:00:42,397 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 312 selfloop transitions, 22 changer transitions 0/378 dead transitions. [2024-06-20 16:00:42,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 378 transitions, 4770 flow [2024-06-20 16:00:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:42,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:42,398 INFO L175 Difference]: Start difference. First operand has 276 places, 368 transitions, 4076 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 378 transitions, 4770 flow [2024-06-20 16:00:43,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 378 transitions, 4591 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:43,166 INFO L231 Difference]: Finished difference. Result has 278 places, 368 transitions, 3950 flow [2024-06-20 16:00:43,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=278, PETRI_TRANSITIONS=368} [2024-06-20 16:00:43,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 16:00:43,167 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 368 transitions, 3950 flow [2024-06-20 16:00:43,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:43,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:43,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:43,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:00:43,167 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)] === [2024-06-20 16:00:43,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1129398340, now seen corresponding path program 1 times [2024-06-20 16:00:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87564260] [2024-06-20 16:00:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:44,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:44,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87564260] [2024-06-20 16:00:44,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87564260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:44,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:44,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594499923] [2024-06-20 16:00:44,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:44,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:44,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 368 transitions, 3950 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:44,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:44,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:44,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:45,224 INFO L124 PetriNetUnfolderBase]: 2348/3850 cut-off events. [2024-06-20 16:00:45,224 INFO L125 PetriNetUnfolderBase]: For 562383/562385 co-relation queries the response was YES. [2024-06-20 16:00:45,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 3850 events. 2348/3850 cut-off events. For 562383/562385 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22831 event pairs, 491 based on Foata normal form. 2/3851 useless extension candidates. Maximal degree in co-relation 39915. Up to 3445 conditions per place. [2024-06-20 16:00:45,272 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 347 selfloop transitions, 16 changer transitions 0/391 dead transitions. [2024-06-20 16:00:45,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 391 transitions, 4816 flow [2024-06-20 16:00:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:00:45,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:00:45,273 INFO L175 Difference]: Start difference. First operand has 278 places, 368 transitions, 3950 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:00:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 391 transitions, 4816 flow [2024-06-20 16:00:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 391 transitions, 4762 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:46,101 INFO L231 Difference]: Finished difference. Result has 279 places, 370 transitions, 4017 flow [2024-06-20 16:00:46,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=279, PETRI_TRANSITIONS=370} [2024-06-20 16:00:46,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 16:00:46,101 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 370 transitions, 4017 flow [2024-06-20 16:00:46,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:46,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:46,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:00:46,102 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)] === [2024-06-20 16:00:46,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1698843488, now seen corresponding path program 2 times [2024-06-20 16:00:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:46,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093237893] [2024-06-20 16:00:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:46,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:47,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:47,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093237893] [2024-06-20 16:00:47,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093237893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:47,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:47,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:47,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783887912] [2024-06-20 16:00:47,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:47,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:47,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:47,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:47,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:47,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:47,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 370 transitions, 4017 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:47,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:47,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:47,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:48,034 INFO L124 PetriNetUnfolderBase]: 2357/3869 cut-off events. [2024-06-20 16:00:48,034 INFO L125 PetriNetUnfolderBase]: For 574639/574641 co-relation queries the response was YES. [2024-06-20 16:00:48,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40464 conditions, 3869 events. 2357/3869 cut-off events. For 574639/574641 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23040 event pairs, 526 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 40336. Up to 3475 conditions per place. [2024-06-20 16:00:48,085 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 344 selfloop transitions, 17 changer transitions 0/389 dead transitions. [2024-06-20 16:00:48,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 4871 flow [2024-06-20 16:00:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:00:48,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:00:48,086 INFO L175 Difference]: Start difference. First operand has 279 places, 370 transitions, 4017 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:00:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 4871 flow [2024-06-20 16:00:49,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 389 transitions, 4766 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:49,029 INFO L231 Difference]: Finished difference. Result has 281 places, 372 transitions, 4039 flow [2024-06-20 16:00:49,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4039, PETRI_PLACES=281, PETRI_TRANSITIONS=372} [2024-06-20 16:00:49,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-20 16:00:49,030 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 372 transitions, 4039 flow [2024-06-20 16:00:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:49,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:49,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:00:49,030 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)] === [2024-06-20 16:00:49,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash -982642886, now seen corresponding path program 3 times [2024-06-20 16:00:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145477997] [2024-06-20 16:00:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145477997] [2024-06-20 16:00:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145477997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629469040] [2024-06-20 16:00:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:50,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:50,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 372 transitions, 4039 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:50,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:50,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:50,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:51,144 INFO L124 PetriNetUnfolderBase]: 2365/3883 cut-off events. [2024-06-20 16:00:51,144 INFO L125 PetriNetUnfolderBase]: For 589401/589403 co-relation queries the response was YES. [2024-06-20 16:00:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40732 conditions, 3883 events. 2365/3883 cut-off events. For 589401/589403 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23140 event pairs, 524 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 40603. Up to 3493 conditions per place. [2024-06-20 16:00:51,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 346 selfloop transitions, 17 changer transitions 0/391 dead transitions. [2024-06-20 16:00:51,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 391 transitions, 4953 flow [2024-06-20 16:00:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:51,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:51,198 INFO L175 Difference]: Start difference. First operand has 281 places, 372 transitions, 4039 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:51,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 391 transitions, 4953 flow [2024-06-20 16:00:52,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 391 transitions, 4842 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:52,345 INFO L231 Difference]: Finished difference. Result has 284 places, 377 transitions, 4127 flow [2024-06-20 16:00:52,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4127, PETRI_PLACES=284, PETRI_TRANSITIONS=377} [2024-06-20 16:00:52,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 16:00:52,345 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 377 transitions, 4127 flow [2024-06-20 16:00:52,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:52,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:52,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:52,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:00:52,346 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)] === [2024-06-20 16:00:52,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash -982458188, now seen corresponding path program 1 times [2024-06-20 16:00:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23897034] [2024-06-20 16:00:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23897034] [2024-06-20 16:00:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23897034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:53,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:00:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114869570] [2024-06-20 16:00:53,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:53,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:00:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:00:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:00:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:53,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 377 transitions, 4127 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:53,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:53,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:54,769 INFO L124 PetriNetUnfolderBase]: 2421/3935 cut-off events. [2024-06-20 16:00:54,770 INFO L125 PetriNetUnfolderBase]: For 591316/591318 co-relation queries the response was YES. [2024-06-20 16:00:54,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 3935 events. 2421/3935 cut-off events. For 591316/591318 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23124 event pairs, 543 based on Foata normal form. 2/3936 useless extension candidates. Maximal degree in co-relation 40920. Up to 3663 conditions per place. [2024-06-20 16:00:54,821 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 360 selfloop transitions, 26 changer transitions 0/391 dead transitions. [2024-06-20 16:00:54,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 391 transitions, 4937 flow [2024-06-20 16:00:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:00:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:00:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:00:54,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:00:54,823 INFO L175 Difference]: Start difference. First operand has 284 places, 377 transitions, 4127 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:00:54,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 391 transitions, 4937 flow [2024-06-20 16:00:55,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 391 transitions, 4794 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:55,794 INFO L231 Difference]: Finished difference. Result has 288 places, 377 transitions, 4043 flow [2024-06-20 16:00:55,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4043, PETRI_PLACES=288, PETRI_TRANSITIONS=377} [2024-06-20 16:00:55,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 16:00:55,794 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 377 transitions, 4043 flow [2024-06-20 16:00:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:55,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:55,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:00:55,795 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)] === [2024-06-20 16:00:55,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash 238833538, now seen corresponding path program 4 times [2024-06-20 16:00:55,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:55,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108191848] [2024-06-20 16:00:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:55,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108191848] [2024-06-20 16:00:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108191848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:56,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:56,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019639551] [2024-06-20 16:00:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:56,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:56,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 377 transitions, 4043 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:56,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:56,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:56,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:57,825 INFO L124 PetriNetUnfolderBase]: 2352/3867 cut-off events. [2024-06-20 16:00:57,826 INFO L125 PetriNetUnfolderBase]: For 594738/594742 co-relation queries the response was YES. [2024-06-20 16:00:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 3867 events. 2352/3867 cut-off events. For 594738/594742 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23088 event pairs, 524 based on Foata normal form. 4/3870 useless extension candidates. Maximal degree in co-relation 40261. Up to 3466 conditions per place. [2024-06-20 16:00:57,878 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 341 selfloop transitions, 24 changer transitions 0/393 dead transitions. [2024-06-20 16:00:57,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 393 transitions, 4954 flow [2024-06-20 16:00:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:57,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:57,879 INFO L175 Difference]: Start difference. First operand has 288 places, 377 transitions, 4043 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:57,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 393 transitions, 4954 flow [2024-06-20 16:00:58,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 393 transitions, 4813 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 16:00:58,923 INFO L231 Difference]: Finished difference. Result has 289 places, 382 transitions, 4118 flow [2024-06-20 16:00:58,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4118, PETRI_PLACES=289, PETRI_TRANSITIONS=382} [2024-06-20 16:00:58,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-20 16:00:58,924 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 382 transitions, 4118 flow [2024-06-20 16:00:58,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-20 16:00:58,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:58,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:00:58,924 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:58,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 758761312, now seen corresponding path program 2 times [2024-06-20 16:00:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449547184] [2024-06-20 16:00:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:00,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:00,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449547184] [2024-06-20 16:01:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449547184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:00,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682877718] [2024-06-20 16:01:00,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:00,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:00,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:00,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:00,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 382 transitions, 4118 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:00,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:00,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:00,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:01,354 INFO L124 PetriNetUnfolderBase]: 2408/3919 cut-off events. [2024-06-20 16:01:01,355 INFO L125 PetriNetUnfolderBase]: For 589767/589771 co-relation queries the response was YES. [2024-06-20 16:01:01,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40700 conditions, 3919 events. 2408/3919 cut-off events. For 589767/589771 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23035 event pairs, 544 based on Foata normal form. 4/3922 useless extension candidates. Maximal degree in co-relation 40567. Up to 3636 conditions per place. [2024-06-20 16:01:01,407 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 355 selfloop transitions, 33 changer transitions 0/393 dead transitions. [2024-06-20 16:01:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 393 transitions, 4922 flow [2024-06-20 16:01:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:01:01,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:01:01,408 INFO L175 Difference]: Start difference. First operand has 289 places, 382 transitions, 4118 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:01:01,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 393 transitions, 4922 flow [2024-06-20 16:01:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 393 transitions, 4735 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:02,432 INFO L231 Difference]: Finished difference. Result has 293 places, 382 transitions, 4004 flow [2024-06-20 16:01:02,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4004, PETRI_PLACES=293, PETRI_TRANSITIONS=382} [2024-06-20 16:01:02,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-20 16:01:02,432 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 382 transitions, 4004 flow [2024-06-20 16:01:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:02,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:02,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:01:02,433 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash -920044944, now seen corresponding path program 1 times [2024-06-20 16:01:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938318578] [2024-06-20 16:01:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:03,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938318578] [2024-06-20 16:01:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938318578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:03,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154287063] [2024-06-20 16:01:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:03,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:03,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:03,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:03,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 382 transitions, 4004 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:03,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:03,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:03,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:04,460 INFO L124 PetriNetUnfolderBase]: 2413/3925 cut-off events. [2024-06-20 16:01:04,460 INFO L125 PetriNetUnfolderBase]: For 595771/595775 co-relation queries the response was YES. [2024-06-20 16:01:04,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40783 conditions, 3925 events. 2413/3925 cut-off events. For 595771/595775 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23070 event pairs, 529 based on Foata normal form. 5/3929 useless extension candidates. Maximal degree in co-relation 40649. Up to 3588 conditions per place. [2024-06-20 16:01:04,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 35 changer transitions 0/414 dead transitions. [2024-06-20 16:01:04,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 414 transitions, 5070 flow [2024-06-20 16:01:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:01:04,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:01:04,517 INFO L175 Difference]: Start difference. First operand has 293 places, 382 transitions, 4004 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:01:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 414 transitions, 5070 flow [2024-06-20 16:01:05,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 414 transitions, 4926 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:01:05,608 INFO L231 Difference]: Finished difference. Result has 294 places, 385 transitions, 4099 flow [2024-06-20 16:01:05,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4099, PETRI_PLACES=294, PETRI_TRANSITIONS=385} [2024-06-20 16:01:05,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 16:01:05,608 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 385 transitions, 4099 flow [2024-06-20 16:01:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:05,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:05,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:01:05,609 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:05,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1136641890, now seen corresponding path program 1 times [2024-06-20 16:01:05,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:05,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440110685] [2024-06-20 16:01:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:06,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:06,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440110685] [2024-06-20 16:01:06,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440110685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:06,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:06,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57756420] [2024-06-20 16:01:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:06,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:06,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 385 transitions, 4099 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:06,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:06,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:07,755 INFO L124 PetriNetUnfolderBase]: 2472/4016 cut-off events. [2024-06-20 16:01:07,755 INFO L125 PetriNetUnfolderBase]: For 618056/618058 co-relation queries the response was YES. [2024-06-20 16:01:07,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 4016 events. 2472/4016 cut-off events. For 618056/618058 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23529 event pairs, 499 based on Foata normal form. 4/4019 useless extension candidates. Maximal degree in co-relation 41834. Up to 3678 conditions per place. [2024-06-20 16:01:07,809 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 382 selfloop transitions, 43 changer transitions 0/430 dead transitions. [2024-06-20 16:01:07,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 430 transitions, 5432 flow [2024-06-20 16:01:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:01:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:01:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 16:01:07,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-20 16:01:07,810 INFO L175 Difference]: Start difference. First operand has 294 places, 385 transitions, 4099 flow. Second operand 10 states and 174 transitions. [2024-06-20 16:01:07,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 430 transitions, 5432 flow [2024-06-20 16:01:09,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 430 transitions, 5174 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:09,142 INFO L231 Difference]: Finished difference. Result has 300 places, 408 transitions, 4365 flow [2024-06-20 16:01:09,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4365, PETRI_PLACES=300, PETRI_TRANSITIONS=408} [2024-06-20 16:01:09,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-20 16:01:09,143 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 408 transitions, 4365 flow [2024-06-20 16:01:09,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:09,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:09,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:01:09,144 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:09,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash 578407438, now seen corresponding path program 2 times [2024-06-20 16:01:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:09,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136735890] [2024-06-20 16:01:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:10,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136735890] [2024-06-20 16:01:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136735890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:10,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:10,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984533583] [2024-06-20 16:01:10,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:10,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:10,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:10,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 408 transitions, 4365 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:10,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:10,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:10,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:11,297 INFO L124 PetriNetUnfolderBase]: 2498/4054 cut-off events. [2024-06-20 16:01:11,297 INFO L125 PetriNetUnfolderBase]: For 643885/643889 co-relation queries the response was YES. [2024-06-20 16:01:11,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43218 conditions, 4054 events. 2498/4054 cut-off events. For 643885/643889 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23742 event pairs, 492 based on Foata normal form. 5/4058 useless extension candidates. Maximal degree in co-relation 43079. Up to 3653 conditions per place. [2024-06-20 16:01:11,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 67 changer transitions 0/447 dead transitions. [2024-06-20 16:01:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 447 transitions, 5840 flow [2024-06-20 16:01:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:01:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:01:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 16:01:11,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:01:11,356 INFO L175 Difference]: Start difference. First operand has 300 places, 408 transitions, 4365 flow. Second operand 10 states and 180 transitions. [2024-06-20 16:01:11,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 447 transitions, 5840 flow [2024-06-20 16:01:12,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 447 transitions, 5659 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-20 16:01:12,997 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 4636 flow [2024-06-20 16:01:12,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4636, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-20 16:01:12,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 16:01:12,997 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 4636 flow [2024-06-20 16:01:12,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:12,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:12,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:01:12,998 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:12,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1195643922, now seen corresponding path program 3 times [2024-06-20 16:01:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:12,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914002983] [2024-06-20 16:01:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:14,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914002983] [2024-06-20 16:01:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914002983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:14,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336846997] [2024-06-20 16:01:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:14,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:14,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 4636 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:14,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:14,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:14,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:15,219 INFO L124 PetriNetUnfolderBase]: 2508/4068 cut-off events. [2024-06-20 16:01:15,220 INFO L125 PetriNetUnfolderBase]: For 673034/673038 co-relation queries the response was YES. [2024-06-20 16:01:15,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44252 conditions, 4068 events. 2508/4068 cut-off events. For 673034/673038 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23834 event pairs, 528 based on Foata normal form. 6/4073 useless extension candidates. Maximal degree in co-relation 44110. Up to 3685 conditions per place. [2024-06-20 16:01:15,274 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 388 selfloop transitions, 58 changer transitions 0/451 dead transitions. [2024-06-20 16:01:15,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 451 transitions, 5874 flow [2024-06-20 16:01:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:01:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:01:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-20 16:01:15,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-20 16:01:15,275 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 4636 flow. Second operand 10 states and 179 transitions. [2024-06-20 16:01:15,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 451 transitions, 5874 flow [2024-06-20 16:01:16,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 451 transitions, 5624 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:16,614 INFO L231 Difference]: Finished difference. Result has 313 places, 422 transitions, 4693 flow [2024-06-20 16:01:16,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4693, PETRI_PLACES=313, PETRI_TRANSITIONS=422} [2024-06-20 16:01:16,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 16:01:16,614 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 422 transitions, 4693 flow [2024-06-20 16:01:16,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:16,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:16,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:01:16,615 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:16,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1635623590, now seen corresponding path program 2 times [2024-06-20 16:01:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:16,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219899936] [2024-06-20 16:01:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:16,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:17,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:17,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219899936] [2024-06-20 16:01:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219899936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943672678] [2024-06-20 16:01:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:17,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:17,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 422 transitions, 4693 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:17,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:17,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:17,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:19,077 INFO L124 PetriNetUnfolderBase]: 2524/4094 cut-off events. [2024-06-20 16:01:19,077 INFO L125 PetriNetUnfolderBase]: For 680198/680200 co-relation queries the response was YES. [2024-06-20 16:01:19,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44588 conditions, 4094 events. 2524/4094 cut-off events. For 680198/680200 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24030 event pairs, 507 based on Foata normal form. 1/4093 useless extension candidates. Maximal degree in co-relation 44444. Up to 3588 conditions per place. [2024-06-20 16:01:19,132 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 78 changer transitions 0/453 dead transitions. [2024-06-20 16:01:19,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 453 transitions, 5861 flow [2024-06-20 16:01:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:01:19,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:01:19,134 INFO L175 Difference]: Start difference. First operand has 313 places, 422 transitions, 4693 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:01:19,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 453 transitions, 5861 flow [2024-06-20 16:01:20,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 453 transitions, 5636 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-20 16:01:20,520 INFO L231 Difference]: Finished difference. Result has 314 places, 428 transitions, 4834 flow [2024-06-20 16:01:20,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4468, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4834, PETRI_PLACES=314, PETRI_TRANSITIONS=428} [2024-06-20 16:01:20,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 16:01:20,521 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 428 transitions, 4834 flow [2024-06-20 16:01:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:20,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:20,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:20,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:01:20,521 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:20,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1635324688, now seen corresponding path program 1 times [2024-06-20 16:01:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291472094] [2024-06-20 16:01:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:21,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291472094] [2024-06-20 16:01:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291472094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:21,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:21,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123922] [2024-06-20 16:01:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:21,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:21,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:21,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:21,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 428 transitions, 4834 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:21,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:21,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:21,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:23,071 INFO L124 PetriNetUnfolderBase]: 2529/4108 cut-off events. [2024-06-20 16:01:23,071 INFO L125 PetriNetUnfolderBase]: For 699101/699105 co-relation queries the response was YES. [2024-06-20 16:01:23,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45146 conditions, 4108 events. 2529/4108 cut-off events. For 699101/699105 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 24186 event pairs, 543 based on Foata normal form. 5/4111 useless extension candidates. Maximal degree in co-relation 45001. Up to 3750 conditions per place. [2024-06-20 16:01:23,129 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 410 selfloop transitions, 40 changer transitions 0/455 dead transitions. [2024-06-20 16:01:23,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 455 transitions, 5944 flow [2024-06-20 16:01:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:01:23,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:01:23,130 INFO L175 Difference]: Start difference. First operand has 314 places, 428 transitions, 4834 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:01:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 455 transitions, 5944 flow [2024-06-20 16:01:24,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 455 transitions, 5630 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:24,877 INFO L231 Difference]: Finished difference. Result has 317 places, 431 transitions, 4744 flow [2024-06-20 16:01:24,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4744, PETRI_PLACES=317, PETRI_TRANSITIONS=431} [2024-06-20 16:01:24,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 16:01:24,878 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 431 transitions, 4744 flow [2024-06-20 16:01:24,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:24,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:24,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:24,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:01:24,878 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:24,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1635325060, now seen corresponding path program 3 times [2024-06-20 16:01:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:24,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779928715] [2024-06-20 16:01:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:25,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:25,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779928715] [2024-06-20 16:01:25,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779928715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:25,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:25,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276517753] [2024-06-20 16:01:25,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:25,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:25,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:25,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 431 transitions, 4744 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:27,094 INFO L124 PetriNetUnfolderBase]: 2542/4119 cut-off events. [2024-06-20 16:01:27,095 INFO L125 PetriNetUnfolderBase]: For 721582/721584 co-relation queries the response was YES. [2024-06-20 16:01:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45835 conditions, 4119 events. 2542/4119 cut-off events. For 721582/721584 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 24174 event pairs, 506 based on Foata normal form. 1/4118 useless extension candidates. Maximal degree in co-relation 45689. Up to 3598 conditions per place. [2024-06-20 16:01:27,151 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 89 changer transitions 0/460 dead transitions. [2024-06-20 16:01:27,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 460 transitions, 6268 flow [2024-06-20 16:01:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:01:27,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:01:27,152 INFO L175 Difference]: Start difference. First operand has 317 places, 431 transitions, 4744 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:01:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 460 transitions, 6268 flow [2024-06-20 16:01:28,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 460 transitions, 6066 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:28,663 INFO L231 Difference]: Finished difference. Result has 319 places, 437 transitions, 5088 flow [2024-06-20 16:01:28,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5088, PETRI_PLACES=319, PETRI_TRANSITIONS=437} [2024-06-20 16:01:28,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 16:01:28,663 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 437 transitions, 5088 flow [2024-06-20 16:01:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:28,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:01:28,664 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:28,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1640985970, now seen corresponding path program 4 times [2024-06-20 16:01:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925049060] [2024-06-20 16:01:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:29,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:29,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925049060] [2024-06-20 16:01:29,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925049060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:29,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:29,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593684402] [2024-06-20 16:01:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:29,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:29,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:29,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 437 transitions, 5088 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:29,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:29,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:29,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:30,921 INFO L124 PetriNetUnfolderBase]: 2539/4115 cut-off events. [2024-06-20 16:01:30,922 INFO L125 PetriNetUnfolderBase]: For 735557/735559 co-relation queries the response was YES. [2024-06-20 16:01:30,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46173 conditions, 4115 events. 2539/4115 cut-off events. For 735557/735559 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 24092 event pairs, 542 based on Foata normal form. 1/4114 useless extension candidates. Maximal degree in co-relation 46026. Up to 3609 conditions per place. [2024-06-20 16:01:30,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 76 changer transitions 0/462 dead transitions. [2024-06-20 16:01:30,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 462 transitions, 6076 flow [2024-06-20 16:01:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:01:30,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 16:01:30,979 INFO L175 Difference]: Start difference. First operand has 319 places, 437 transitions, 5088 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:01:30,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 462 transitions, 6076 flow [2024-06-20 16:01:32,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 462 transitions, 5657 flow, removed 164 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:32,722 INFO L231 Difference]: Finished difference. Result has 323 places, 437 transitions, 4827 flow [2024-06-20 16:01:32,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4827, PETRI_PLACES=323, PETRI_TRANSITIONS=437} [2024-06-20 16:01:32,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-20 16:01:32,722 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 437 transitions, 4827 flow [2024-06-20 16:01:32,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:32,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:32,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:01:32,723 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:32,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1640865814, now seen corresponding path program 4 times [2024-06-20 16:01:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828236748] [2024-06-20 16:01:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828236748] [2024-06-20 16:01:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828236748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471708611] [2024-06-20 16:01:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:33,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:33,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 437 transitions, 4827 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:33,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:33,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:33,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:34,840 INFO L124 PetriNetUnfolderBase]: 2549/4132 cut-off events. [2024-06-20 16:01:34,841 INFO L125 PetriNetUnfolderBase]: For 749618/749622 co-relation queries the response was YES. [2024-06-20 16:01:34,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46432 conditions, 4132 events. 2549/4132 cut-off events. For 749618/749622 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24266 event pairs, 538 based on Foata normal form. 4/4135 useless extension candidates. Maximal degree in co-relation 46283. Up to 3717 conditions per place. [2024-06-20 16:01:34,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 401 selfloop transitions, 58 changer transitions 0/464 dead transitions. [2024-06-20 16:01:34,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 464 transitions, 6037 flow [2024-06-20 16:01:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:01:34,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:01:34,895 INFO L175 Difference]: Start difference. First operand has 323 places, 437 transitions, 4827 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:01:34,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 464 transitions, 6037 flow [2024-06-20 16:01:36,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 464 transitions, 5834 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 16:01:36,994 INFO L231 Difference]: Finished difference. Result has 323 places, 441 transitions, 4941 flow [2024-06-20 16:01:36,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4624, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4941, PETRI_PLACES=323, PETRI_TRANSITIONS=441} [2024-06-20 16:01:36,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-20 16:01:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 441 transitions, 4941 flow [2024-06-20 16:01:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:36,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:36,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:01:36,996 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:36,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -406547131, now seen corresponding path program 1 times [2024-06-20 16:01:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:36,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102229900] [2024-06-20 16:01:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102229900] [2024-06-20 16:01:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102229900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:38,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:38,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:38,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129541244] [2024-06-20 16:01:38,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:38,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:38,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:38,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:38,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 441 transitions, 4941 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:38,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:38,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:39,286 INFO L124 PetriNetUnfolderBase]: 2569/4165 cut-off events. [2024-06-20 16:01:39,286 INFO L125 PetriNetUnfolderBase]: For 783573/783579 co-relation queries the response was YES. [2024-06-20 16:01:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47487 conditions, 4165 events. 2569/4165 cut-off events. For 783573/783579 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24468 event pairs, 502 based on Foata normal form. 10/4174 useless extension candidates. Maximal degree in co-relation 47337. Up to 3824 conditions per place. [2024-06-20 16:01:39,342 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 35 changer transitions 0/468 dead transitions. [2024-06-20 16:01:39,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 468 transitions, 6173 flow [2024-06-20 16:01:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:01:39,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:01:39,344 INFO L175 Difference]: Start difference. First operand has 323 places, 441 transitions, 4941 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:01:39,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 468 transitions, 6173 flow [2024-06-20 16:01:41,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 468 transitions, 5884 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:41,273 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 4915 flow [2024-06-20 16:01:41,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4915, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-20 16:01:41,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-20 16:01:41,274 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 4915 flow [2024-06-20 16:01:41,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:41,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:41,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:41,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:01:41,274 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:41,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1631600038, now seen corresponding path program 2 times [2024-06-20 16:01:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371867767] [2024-06-20 16:01:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371867767] [2024-06-20 16:01:42,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371867767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:42,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:42,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:42,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066566370] [2024-06-20 16:01:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:42,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:42,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:42,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:42,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:42,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:42,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:42,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:43,794 INFO L124 PetriNetUnfolderBase]: 2574/4172 cut-off events. [2024-06-20 16:01:43,794 INFO L125 PetriNetUnfolderBase]: For 787792/787798 co-relation queries the response was YES. [2024-06-20 16:01:43,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47923 conditions, 4172 events. 2574/4172 cut-off events. For 787792/787798 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24574 event pairs, 502 based on Foata normal form. 7/4178 useless extension candidates. Maximal degree in co-relation 47772. Up to 3840 conditions per place. [2024-06-20 16:01:43,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 34 changer transitions 0/470 dead transitions. [2024-06-20 16:01:43,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 470 transitions, 6107 flow [2024-06-20 16:01:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:01:43,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:01:43,855 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 4915 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:01:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 470 transitions, 6107 flow [2024-06-20 16:01:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 470 transitions, 5876 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:45,695 INFO L231 Difference]: Finished difference. Result has 327 places, 448 transitions, 4912 flow [2024-06-20 16:01:45,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4912, PETRI_PLACES=327, PETRI_TRANSITIONS=448} [2024-06-20 16:01:45,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 16:01:45,696 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 448 transitions, 4912 flow [2024-06-20 16:01:45,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:45,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:45,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:45,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:01:45,696 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:45,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:45,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1052502972, now seen corresponding path program 5 times [2024-06-20 16:01:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:45,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670817592] [2024-06-20 16:01:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:45,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:46,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670817592] [2024-06-20 16:01:46,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670817592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:46,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:46,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588902773] [2024-06-20 16:01:46,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:46,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:46,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:46,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:46,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 448 transitions, 4912 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:46,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:46,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:46,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:47,796 INFO L124 PetriNetUnfolderBase]: 2584/4183 cut-off events. [2024-06-20 16:01:47,796 INFO L125 PetriNetUnfolderBase]: For 808037/808041 co-relation queries the response was YES. [2024-06-20 16:01:47,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48232 conditions, 4183 events. 2584/4183 cut-off events. For 808037/808041 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24575 event pairs, 501 based on Foata normal form. 4/4186 useless extension candidates. Maximal degree in co-relation 48080. Up to 3736 conditions per place. [2024-06-20 16:01:47,861 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 399 selfloop transitions, 69 changer transitions 0/473 dead transitions. [2024-06-20 16:01:47,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 473 transitions, 6196 flow [2024-06-20 16:01:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:01:47,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:01:47,863 INFO L175 Difference]: Start difference. First operand has 327 places, 448 transitions, 4912 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:01:47,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 473 transitions, 6196 flow [2024-06-20 16:01:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 473 transitions, 5990 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:49,728 INFO L231 Difference]: Finished difference. Result has 329 places, 452 transitions, 5061 flow [2024-06-20 16:01:49,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5061, PETRI_PLACES=329, PETRI_TRANSITIONS=452} [2024-06-20 16:01:49,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-20 16:01:49,729 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 452 transitions, 5061 flow [2024-06-20 16:01:49,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:49,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:49,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:01:49,730 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:49,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -406547534, now seen corresponding path program 6 times [2024-06-20 16:01:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563027511] [2024-06-20 16:01:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563027511] [2024-06-20 16:01:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563027511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:50,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:50,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094421027] [2024-06-20 16:01:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:50,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:50,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 452 transitions, 5061 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:51,973 INFO L124 PetriNetUnfolderBase]: 2594/4199 cut-off events. [2024-06-20 16:01:51,973 INFO L125 PetriNetUnfolderBase]: For 831278/831282 co-relation queries the response was YES. [2024-06-20 16:01:52,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49191 conditions, 4199 events. 2594/4199 cut-off events. For 831278/831282 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 24717 event pairs, 503 based on Foata normal form. 4/4202 useless extension candidates. Maximal degree in co-relation 49038. Up to 3718 conditions per place. [2024-06-20 16:01:52,036 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 384 selfloop transitions, 88 changer transitions 0/477 dead transitions. [2024-06-20 16:01:52,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 477 transitions, 6523 flow [2024-06-20 16:01:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:01:52,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:01:52,038 INFO L175 Difference]: Start difference. First operand has 329 places, 452 transitions, 5061 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:01:52,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 477 transitions, 6523 flow [2024-06-20 16:01:54,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 477 transitions, 6196 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:54,049 INFO L231 Difference]: Finished difference. Result has 331 places, 456 transitions, 5135 flow [2024-06-20 16:01:54,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5135, PETRI_PLACES=331, PETRI_TRANSITIONS=456} [2024-06-20 16:01:54,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 16:01:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 456 transitions, 5135 flow [2024-06-20 16:01:54,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:54,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:01:54,051 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -438983480, now seen corresponding path program 7 times [2024-06-20 16:01:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267742854] [2024-06-20 16:01:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267742854] [2024-06-20 16:01:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267742854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:55,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:55,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:55,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032114431] [2024-06-20 16:01:55,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:55,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:55,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:55,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 456 transitions, 5135 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:55,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:55,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:55,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:56,422 INFO L124 PetriNetUnfolderBase]: 2620/4236 cut-off events. [2024-06-20 16:01:56,422 INFO L125 PetriNetUnfolderBase]: For 860792/860794 co-relation queries the response was YES. [2024-06-20 16:01:56,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50518 conditions, 4236 events. 2620/4236 cut-off events. For 860792/860794 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24882 event pairs, 499 based on Foata normal form. 1/4236 useless extension candidates. Maximal degree in co-relation 50364. Up to 3875 conditions per place. [2024-06-20 16:01:56,484 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 430 selfloop transitions, 50 changer transitions 0/485 dead transitions. [2024-06-20 16:01:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 485 transitions, 6776 flow [2024-06-20 16:01:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:01:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:01:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 16:01:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-20 16:01:56,485 INFO L175 Difference]: Start difference. First operand has 331 places, 456 transitions, 5135 flow. Second operand 10 states and 172 transitions. [2024-06-20 16:01:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 485 transitions, 6776 flow [2024-06-20 16:01:58,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 485 transitions, 6422 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:58,456 INFO L231 Difference]: Finished difference. Result has 336 places, 466 transitions, 5289 flow [2024-06-20 16:01:58,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5289, PETRI_PLACES=336, PETRI_TRANSITIONS=466} [2024-06-20 16:01:58,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-20 16:01:58,456 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 466 transitions, 5289 flow [2024-06-20 16:01:58,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:58,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:58,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:01:58,456 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:58,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:58,457 INFO L85 PathProgramCache]: Analyzing trace with hash 789406980, now seen corresponding path program 8 times [2024-06-20 16:01:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101608978] [2024-06-20 16:01:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:59,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:59,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101608978] [2024-06-20 16:01:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101608978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:59,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012231571] [2024-06-20 16:01:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:59,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:59,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 466 transitions, 5289 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:59,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:59,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:59,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:00,883 INFO L124 PetriNetUnfolderBase]: 2614/4228 cut-off events. [2024-06-20 16:02:00,883 INFO L125 PetriNetUnfolderBase]: For 880119/880121 co-relation queries the response was YES. [2024-06-20 16:02:00,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50553 conditions, 4228 events. 2614/4228 cut-off events. For 880119/880121 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 24840 event pairs, 497 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 50397. Up to 3875 conditions per place. [2024-06-20 16:02:00,948 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 44 changer transitions 0/483 dead transitions. [2024-06-20 16:02:00,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 483 transitions, 6343 flow [2024-06-20 16:02:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:02:00,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:02:00,949 INFO L175 Difference]: Start difference. First operand has 336 places, 466 transitions, 5289 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:02:00,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 483 transitions, 6343 flow [2024-06-20 16:02:02,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 483 transitions, 5956 flow, removed 167 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:02,923 INFO L231 Difference]: Finished difference. Result has 339 places, 466 transitions, 4997 flow [2024-06-20 16:02:02,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4997, PETRI_PLACES=339, PETRI_TRANSITIONS=466} [2024-06-20 16:02:02,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 16:02:02,923 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 466 transitions, 4997 flow [2024-06-20 16:02:02,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:02,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:02,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:02:02,924 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 789551130, now seen corresponding path program 9 times [2024-06-20 16:02:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161896523] [2024-06-20 16:02:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161896523] [2024-06-20 16:02:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161896523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:03,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354442761] [2024-06-20 16:02:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:03,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:04,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:04,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 466 transitions, 4997 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:04,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:04,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:04,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:05,086 INFO L124 PetriNetUnfolderBase]: 2624/4245 cut-off events. [2024-06-20 16:02:05,086 INFO L125 PetriNetUnfolderBase]: For 892035/892039 co-relation queries the response was YES. [2024-06-20 16:02:05,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50726 conditions, 4245 events. 2624/4245 cut-off events. For 892035/892039 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25007 event pairs, 511 based on Foata normal form. 4/4248 useless extension candidates. Maximal degree in co-relation 50568. Up to 3725 conditions per place. [2024-06-20 16:02:05,145 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 396 selfloop transitions, 88 changer transitions 0/489 dead transitions. [2024-06-20 16:02:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 489 transitions, 6399 flow [2024-06-20 16:02:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:02:05,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:02:05,146 INFO L175 Difference]: Start difference. First operand has 339 places, 466 transitions, 4997 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:02:05,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 489 transitions, 6399 flow [2024-06-20 16:02:07,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 489 transitions, 6306 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:07,083 INFO L231 Difference]: Finished difference. Result has 341 places, 470 transitions, 5323 flow [2024-06-20 16:02:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5323, PETRI_PLACES=341, PETRI_TRANSITIONS=470} [2024-06-20 16:02:07,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-20 16:02:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 470 transitions, 5323 flow [2024-06-20 16:02:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:07,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:07,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:07,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:02:07,084 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1067529103, now seen corresponding path program 2 times [2024-06-20 16:02:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914778436] [2024-06-20 16:02:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914778436] [2024-06-20 16:02:08,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914778436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:08,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:08,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708429248] [2024-06-20 16:02:08,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:08,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:08,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:08,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 470 transitions, 5323 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:09,375 INFO L124 PetriNetUnfolderBase]: 2666/4306 cut-off events. [2024-06-20 16:02:09,375 INFO L125 PetriNetUnfolderBase]: For 946424/946430 co-relation queries the response was YES. [2024-06-20 16:02:09,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53059 conditions, 4306 events. 2666/4306 cut-off events. For 946424/946430 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 25420 event pairs, 534 based on Foata normal form. 8/4313 useless extension candidates. Maximal degree in co-relation 52900. Up to 3884 conditions per place. [2024-06-20 16:02:09,443 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 62 changer transitions 0/501 dead transitions. [2024-06-20 16:02:09,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 501 transitions, 7011 flow [2024-06-20 16:02:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:02:09,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:02:09,444 INFO L175 Difference]: Start difference. First operand has 341 places, 470 transitions, 5323 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:02:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 501 transitions, 7011 flow [2024-06-20 16:02:11,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 501 transitions, 6620 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:11,570 INFO L231 Difference]: Finished difference. Result has 344 places, 479 transitions, 5427 flow [2024-06-20 16:02:11,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5427, PETRI_PLACES=344, PETRI_TRANSITIONS=479} [2024-06-20 16:02:11,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 16:02:11,570 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 479 transitions, 5427 flow [2024-06-20 16:02:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:11,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:11,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:11,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:02:11,570 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:11,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1067257140, now seen corresponding path program 10 times [2024-06-20 16:02:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:11,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618434069] [2024-06-20 16:02:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:11,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:12,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:12,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618434069] [2024-06-20 16:02:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618434069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:12,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997219943] [2024-06-20 16:02:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:12,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:12,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:12,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:12,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 479 transitions, 5427 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:12,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:12,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:12,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:13,857 INFO L124 PetriNetUnfolderBase]: 2671/4311 cut-off events. [2024-06-20 16:02:13,857 INFO L125 PetriNetUnfolderBase]: For 966023/966025 co-relation queries the response was YES. [2024-06-20 16:02:13,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53653 conditions, 4311 events. 2671/4311 cut-off events. For 966023/966025 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25373 event pairs, 501 based on Foata normal form. 1/4311 useless extension candidates. Maximal degree in co-relation 53492. Up to 3951 conditions per place. [2024-06-20 16:02:13,923 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 51 changer transitions 0/498 dead transitions. [2024-06-20 16:02:13,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 498 transitions, 6605 flow [2024-06-20 16:02:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:02:13,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:02:13,925 INFO L175 Difference]: Start difference. First operand has 344 places, 479 transitions, 5427 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:02:13,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 498 transitions, 6605 flow [2024-06-20 16:02:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 498 transitions, 6377 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:16,650 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 5461 flow [2024-06-20 16:02:16,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5461, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-20 16:02:16,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-20 16:02:16,650 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 5461 flow [2024-06-20 16:02:16,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:16,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:16,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:16,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:02:16,651 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:16,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -435489997, now seen corresponding path program 3 times [2024-06-20 16:02:16,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:16,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936852691] [2024-06-20 16:02:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:16,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936852691] [2024-06-20 16:02:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936852691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:17,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246260759] [2024-06-20 16:02:17,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:17,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:17,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 5461 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:17,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:17,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:17,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:19,001 INFO L124 PetriNetUnfolderBase]: 2727/4401 cut-off events. [2024-06-20 16:02:19,001 INFO L125 PetriNetUnfolderBase]: For 989164/989170 co-relation queries the response was YES. [2024-06-20 16:02:19,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54735 conditions, 4401 events. 2727/4401 cut-off events. For 989164/989170 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26071 event pairs, 500 based on Foata normal form. 8/4408 useless extension candidates. Maximal degree in co-relation 54572. Up to 4030 conditions per place. [2024-06-20 16:02:19,070 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 471 selfloop transitions, 45 changer transitions 0/521 dead transitions. [2024-06-20 16:02:19,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 521 transitions, 7051 flow [2024-06-20 16:02:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:02:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:02:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:02:19,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:02:19,072 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 5461 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:02:19,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 521 transitions, 7051 flow [2024-06-20 16:02:21,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 521 transitions, 6787 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:21,704 INFO L231 Difference]: Finished difference. Result has 356 places, 503 transitions, 5742 flow [2024-06-20 16:02:21,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5742, PETRI_PLACES=356, PETRI_TRANSITIONS=503} [2024-06-20 16:02:21,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 16:02:21,704 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 503 transitions, 5742 flow [2024-06-20 16:02:21,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:21,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:21,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:21,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:02:21,705 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:21,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash 796913940, now seen corresponding path program 11 times [2024-06-20 16:02:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:21,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105398177] [2024-06-20 16:02:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105398177] [2024-06-20 16:02:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105398177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:22,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:22,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364552329] [2024-06-20 16:02:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:22,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:22,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:22,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:22,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 503 transitions, 5742 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:22,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:22,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:22,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:23,975 INFO L124 PetriNetUnfolderBase]: 2748/4431 cut-off events. [2024-06-20 16:02:23,976 INFO L125 PetriNetUnfolderBase]: For 1012159/1012161 co-relation queries the response was YES. [2024-06-20 16:02:24,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55843 conditions, 4431 events. 2748/4431 cut-off events. For 1012159/1012161 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 26196 event pairs, 518 based on Foata normal form. 3/4433 useless extension candidates. Maximal degree in co-relation 55675. Up to 3741 conditions per place. [2024-06-20 16:02:24,047 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 362 selfloop transitions, 161 changer transitions 0/528 dead transitions. [2024-06-20 16:02:24,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 528 transitions, 7516 flow [2024-06-20 16:02:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:02:24,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:02:24,048 INFO L175 Difference]: Start difference. First operand has 356 places, 503 transitions, 5742 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:02:24,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 528 transitions, 7516 flow [2024-06-20 16:02:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 7320 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:26,894 INFO L231 Difference]: Finished difference. Result has 363 places, 510 transitions, 6363 flow [2024-06-20 16:02:26,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6363, PETRI_PLACES=363, PETRI_TRANSITIONS=510} [2024-06-20 16:02:26,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-20 16:02:26,894 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 510 transitions, 6363 flow [2024-06-20 16:02:26,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:26,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:26,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:26,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:02:26,895 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:26,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 894014284, now seen corresponding path program 3 times [2024-06-20 16:02:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:26,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813434000] [2024-06-20 16:02:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:26,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813434000] [2024-06-20 16:02:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813434000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:28,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:28,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:28,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788693530] [2024-06-20 16:02:28,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:28,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:28,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:28,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:28,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 510 transitions, 6363 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:28,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:28,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:29,678 INFO L124 PetriNetUnfolderBase]: 2761/4454 cut-off events. [2024-06-20 16:02:29,679 INFO L125 PetriNetUnfolderBase]: For 1056498/1056504 co-relation queries the response was YES. [2024-06-20 16:02:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57574 conditions, 4454 events. 2761/4454 cut-off events. For 1056498/1056504 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26388 event pairs, 503 based on Foata normal form. 7/4460 useless extension candidates. Maximal degree in co-relation 57404. Up to 4024 conditions per place. [2024-06-20 16:02:29,747 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 70 changer transitions 0/535 dead transitions. [2024-06-20 16:02:29,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 535 transitions, 8121 flow [2024-06-20 16:02:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:02:29,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:02:29,748 INFO L175 Difference]: Start difference. First operand has 363 places, 510 transitions, 6363 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:02:29,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 535 transitions, 8121 flow [2024-06-20 16:02:32,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 535 transitions, 7795 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:32,151 INFO L231 Difference]: Finished difference. Result has 367 places, 516 transitions, 6549 flow [2024-06-20 16:02:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6045, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6549, PETRI_PLACES=367, PETRI_TRANSITIONS=516} [2024-06-20 16:02:32,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 16:02:32,151 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 516 transitions, 6549 flow [2024-06-20 16:02:32,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:32,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:32,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:02:32,152 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:32,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 796914343, now seen corresponding path program 4 times [2024-06-20 16:02:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:32,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597540452] [2024-06-20 16:02:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597540452] [2024-06-20 16:02:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597540452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:33,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612039465] [2024-06-20 16:02:33,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:33,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 516 transitions, 6549 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:33,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:33,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:33,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:34,787 INFO L124 PetriNetUnfolderBase]: 2771/4466 cut-off events. [2024-06-20 16:02:34,788 INFO L125 PetriNetUnfolderBase]: For 1074044/1074050 co-relation queries the response was YES. [2024-06-20 16:02:34,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57725 conditions, 4466 events. 2771/4466 cut-off events. For 1074044/1074050 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26426 event pairs, 500 based on Foata normal form. 8/4473 useless extension candidates. Maximal degree in co-relation 57553. Up to 3988 conditions per place. [2024-06-20 16:02:34,863 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 79 changer transitions 0/541 dead transitions. [2024-06-20 16:02:34,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 541 transitions, 8110 flow [2024-06-20 16:02:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:02:34,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:02:34,864 INFO L175 Difference]: Start difference. First operand has 367 places, 516 transitions, 6549 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:02:34,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 541 transitions, 8110 flow [2024-06-20 16:02:38,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 541 transitions, 7845 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:38,231 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 6547 flow [2024-06-20 16:02:38,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6547, PETRI_PLACES=371, PETRI_TRANSITIONS=519} [2024-06-20 16:02:38,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 16:02:38,232 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 6547 flow [2024-06-20 16:02:38,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:38,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:38,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:02:38,233 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:38,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 789562290, now seen corresponding path program 12 times [2024-06-20 16:02:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:38,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362864944] [2024-06-20 16:02:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:38,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:39,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362864944] [2024-06-20 16:02:39,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362864944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:39,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:39,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:39,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052324727] [2024-06-20 16:02:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:39,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:39,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:39,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:39,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 519 transitions, 6547 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:39,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:39,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:39,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:40,687 INFO L124 PetriNetUnfolderBase]: 2781/4479 cut-off events. [2024-06-20 16:02:40,687 INFO L125 PetriNetUnfolderBase]: For 1068209/1068211 co-relation queries the response was YES. [2024-06-20 16:02:40,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57619 conditions, 4479 events. 2781/4479 cut-off events. For 1068209/1068211 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 26515 event pairs, 517 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 57445. Up to 3878 conditions per place. [2024-06-20 16:02:40,751 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 421 selfloop transitions, 115 changer transitions 0/541 dead transitions. [2024-06-20 16:02:40,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 541 transitions, 8009 flow [2024-06-20 16:02:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:02:40,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:02:40,752 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 6547 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:02:40,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 541 transitions, 8009 flow [2024-06-20 16:02:43,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 541 transitions, 7815 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:43,339 INFO L231 Difference]: Finished difference. Result has 374 places, 523 transitions, 6821 flow [2024-06-20 16:02:43,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6821, PETRI_PLACES=374, PETRI_TRANSITIONS=523} [2024-06-20 16:02:43,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 16:02:43,339 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 523 transitions, 6821 flow [2024-06-20 16:02:43,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:43,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:43,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:02:43,340 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:43,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -435490214, now seen corresponding path program 4 times [2024-06-20 16:02:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:43,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516114354] [2024-06-20 16:02:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:44,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516114354] [2024-06-20 16:02:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516114354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:44,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:44,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923205410] [2024-06-20 16:02:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:44,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:44,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 523 transitions, 6821 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:44,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:44,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:46,127 INFO L124 PetriNetUnfolderBase]: 2786/4491 cut-off events. [2024-06-20 16:02:46,127 INFO L125 PetriNetUnfolderBase]: For 1077601/1077607 co-relation queries the response was YES. [2024-06-20 16:02:46,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57933 conditions, 4491 events. 2786/4491 cut-off events. For 1077601/1077607 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26642 event pairs, 502 based on Foata normal form. 7/4497 useless extension candidates. Maximal degree in co-relation 57758. Up to 4092 conditions per place. [2024-06-20 16:02:46,197 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 484 selfloop transitions, 56 changer transitions 0/545 dead transitions. [2024-06-20 16:02:46,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 545 transitions, 8231 flow [2024-06-20 16:02:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:02:46,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:02:46,198 INFO L175 Difference]: Start difference. First operand has 374 places, 523 transitions, 6821 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:02:46,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 545 transitions, 8231 flow [2024-06-20 16:02:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 545 transitions, 7805 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:48,747 INFO L231 Difference]: Finished difference. Result has 376 places, 526 transitions, 6676 flow [2024-06-20 16:02:48,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6676, PETRI_PLACES=376, PETRI_TRANSITIONS=526} [2024-06-20 16:02:48,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 16:02:48,748 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 526 transitions, 6676 flow [2024-06-20 16:02:48,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:48,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:02:48,748 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:48,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1047983874, now seen corresponding path program 1 times [2024-06-20 16:02:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77885892] [2024-06-20 16:02:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:49,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77885892] [2024-06-20 16:02:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77885892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:49,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:49,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711281451] [2024-06-20 16:02:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:49,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:49,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 526 transitions, 6676 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:49,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:49,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:50,975 INFO L124 PetriNetUnfolderBase]: 2794/4501 cut-off events. [2024-06-20 16:02:50,975 INFO L125 PetriNetUnfolderBase]: For 1096119/1096123 co-relation queries the response was YES. [2024-06-20 16:02:51,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57775 conditions, 4501 events. 2794/4501 cut-off events. For 1096119/1096123 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 26642 event pairs, 406 based on Foata normal form. 6/4506 useless extension candidates. Maximal degree in co-relation 57599. Up to 4096 conditions per place. [2024-06-20 16:02:51,047 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 513 selfloop transitions, 38 changer transitions 0/556 dead transitions. [2024-06-20 16:02:51,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 556 transitions, 7934 flow [2024-06-20 16:02:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:02:51,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:02:51,049 INFO L175 Difference]: Start difference. First operand has 376 places, 526 transitions, 6676 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:02:51,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 556 transitions, 7934 flow [2024-06-20 16:02:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 556 transitions, 7683 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:53,321 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 6584 flow [2024-06-20 16:02:53,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6584, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-20 16:02:53,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 16:02:53,322 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 6584 flow [2024-06-20 16:02:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:53,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:53,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:02:53,322 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:53,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -742885524, now seen corresponding path program 2 times [2024-06-20 16:02:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:53,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993118983] [2024-06-20 16:02:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:54,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:54,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993118983] [2024-06-20 16:02:54,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993118983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:54,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:54,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659273995] [2024-06-20 16:02:54,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:54,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:54,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:54,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:54,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:54,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:55,727 INFO L124 PetriNetUnfolderBase]: 2802/4513 cut-off events. [2024-06-20 16:02:55,727 INFO L125 PetriNetUnfolderBase]: For 1109158/1109162 co-relation queries the response was YES. [2024-06-20 16:02:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58020 conditions, 4513 events. 2802/4513 cut-off events. For 1109158/1109162 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 26761 event pairs, 494 based on Foata normal form. 6/4518 useless extension candidates. Maximal degree in co-relation 57843. Up to 4147 conditions per place. [2024-06-20 16:02:55,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 510 selfloop transitions, 39 changer transitions 0/554 dead transitions. [2024-06-20 16:02:55,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 554 transitions, 7830 flow [2024-06-20 16:02:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:02:55,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:02:55,804 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 6584 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:02:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 554 transitions, 7830 flow [2024-06-20 16:02:58,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 554 transitions, 7687 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:58,120 INFO L231 Difference]: Finished difference. Result has 380 places, 530 transitions, 6606 flow [2024-06-20 16:02:58,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6441, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6606, PETRI_PLACES=380, PETRI_TRANSITIONS=530} [2024-06-20 16:02:58,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-20 16:02:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 530 transitions, 6606 flow [2024-06-20 16:02:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:58,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:58,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:58,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:02:58,121 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 482493596, now seen corresponding path program 3 times [2024-06-20 16:02:58,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581206738] [2024-06-20 16:02:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581206738] [2024-06-20 16:02:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581206738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110137454] [2024-06-20 16:02:59,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 530 transitions, 6606 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:00,501 INFO L124 PetriNetUnfolderBase]: 2810/4525 cut-off events. [2024-06-20 16:03:00,501 INFO L125 PetriNetUnfolderBase]: For 1126795/1126799 co-relation queries the response was YES. [2024-06-20 16:03:00,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58304 conditions, 4525 events. 2810/4525 cut-off events. For 1126795/1126799 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 26824 event pairs, 496 based on Foata normal form. 6/4530 useless extension candidates. Maximal degree in co-relation 58126. Up to 4164 conditions per place. [2024-06-20 16:03:00,577 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 510 selfloop transitions, 40 changer transitions 0/555 dead transitions. [2024-06-20 16:03:00,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 555 transitions, 7856 flow [2024-06-20 16:03:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:03:00,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:03:00,578 INFO L175 Difference]: Start difference. First operand has 380 places, 530 transitions, 6606 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:03:00,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 555 transitions, 7856 flow [2024-06-20 16:03:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 555 transitions, 7707 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:02,953 INFO L231 Difference]: Finished difference. Result has 382 places, 532 transitions, 6628 flow [2024-06-20 16:03:02,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=382, PETRI_TRANSITIONS=532} [2024-06-20 16:03:02,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 16:03:02,953 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 532 transitions, 6628 flow [2024-06-20 16:03:02,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:02,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:02,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:02,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:03:02,954 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:02,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash 796790994, now seen corresponding path program 4 times [2024-06-20 16:03:02,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:02,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595219332] [2024-06-20 16:03:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:02,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:04,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595219332] [2024-06-20 16:03:04,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595219332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:04,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344383749] [2024-06-20 16:03:04,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:04,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:04,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:04,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 532 transitions, 6628 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:04,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:04,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:04,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:05,434 INFO L124 PetriNetUnfolderBase]: 2818/4532 cut-off events. [2024-06-20 16:03:05,434 INFO L125 PetriNetUnfolderBase]: For 1141905/1141905 co-relation queries the response was YES. [2024-06-20 16:03:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 4532 events. 2818/4532 cut-off events. For 1141905/1141905 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 26810 event pairs, 499 based on Foata normal form. 2/4533 useless extension candidates. Maximal degree in co-relation 58410. Up to 4152 conditions per place. [2024-06-20 16:03:05,512 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 52 changer transitions 0/551 dead transitions. [2024-06-20 16:03:05,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 551 transitions, 7852 flow [2024-06-20 16:03:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:03:05,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:03:05,513 INFO L175 Difference]: Start difference. First operand has 382 places, 532 transitions, 6628 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:03:05,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 551 transitions, 7852 flow [2024-06-20 16:03:08,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 551 transitions, 7701 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:08,489 INFO L231 Difference]: Finished difference. Result has 385 places, 534 transitions, 6676 flow [2024-06-20 16:03:08,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6676, PETRI_PLACES=385, PETRI_TRANSITIONS=534} [2024-06-20 16:03:08,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-20 16:03:08,489 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 534 transitions, 6676 flow [2024-06-20 16:03:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:08,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:08,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:03:08,490 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 786066234, now seen corresponding path program 5 times [2024-06-20 16:03:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:08,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855848457] [2024-06-20 16:03:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:09,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855848457] [2024-06-20 16:03:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855848457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:09,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:09,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573272079] [2024-06-20 16:03:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:09,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:09,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:09,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:09,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 534 transitions, 6676 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:09,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:09,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:09,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:11,068 INFO L124 PetriNetUnfolderBase]: 2826/4544 cut-off events. [2024-06-20 16:03:11,068 INFO L125 PetriNetUnfolderBase]: For 1157172/1157172 co-relation queries the response was YES. [2024-06-20 16:03:11,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58896 conditions, 4544 events. 2826/4544 cut-off events. For 1157172/1157172 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26914 event pairs, 501 based on Foata normal form. 2/4545 useless extension candidates. Maximal degree in co-relation 58716. Up to 4175 conditions per place. [2024-06-20 16:03:11,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 503 selfloop transitions, 45 changer transitions 0/553 dead transitions. [2024-06-20 16:03:11,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 553 transitions, 7908 flow [2024-06-20 16:03:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:03:11,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:03:11,139 INFO L175 Difference]: Start difference. First operand has 385 places, 534 transitions, 6676 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:03:11,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 553 transitions, 7908 flow [2024-06-20 16:03:13,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 553 transitions, 7725 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:13,852 INFO L231 Difference]: Finished difference. Result has 387 places, 536 transitions, 6682 flow [2024-06-20 16:03:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6682, PETRI_PLACES=387, PETRI_TRANSITIONS=536} [2024-06-20 16:03:13,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-20 16:03:13,853 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 536 transitions, 6682 flow [2024-06-20 16:03:13,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:13,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:13,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:03:13,853 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:13,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1617253792, now seen corresponding path program 6 times [2024-06-20 16:03:13,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:13,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051416478] [2024-06-20 16:03:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:15,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:15,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051416478] [2024-06-20 16:03:15,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051416478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:15,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:15,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20032051] [2024-06-20 16:03:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:15,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:15,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 536 transitions, 6682 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:15,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:15,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:15,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:16,546 INFO L124 PetriNetUnfolderBase]: 2834/4556 cut-off events. [2024-06-20 16:03:16,546 INFO L125 PetriNetUnfolderBase]: For 1172757/1172757 co-relation queries the response was YES. [2024-06-20 16:03:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59172 conditions, 4556 events. 2834/4556 cut-off events. For 1172757/1172757 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 26962 event pairs, 499 based on Foata normal form. 2/4557 useless extension candidates. Maximal degree in co-relation 58991. Up to 4182 conditions per place. [2024-06-20 16:03:16,621 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 507 selfloop transitions, 44 changer transitions 0/556 dead transitions. [2024-06-20 16:03:16,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 556 transitions, 7926 flow [2024-06-20 16:03:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:03:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:03:16,623 INFO L175 Difference]: Start difference. First operand has 387 places, 536 transitions, 6682 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:03:16,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 556 transitions, 7926 flow [2024-06-20 16:03:19,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 556 transitions, 7748 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:19,514 INFO L231 Difference]: Finished difference. Result has 389 places, 538 transitions, 6695 flow [2024-06-20 16:03:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6695, PETRI_PLACES=389, PETRI_TRANSITIONS=538} [2024-06-20 16:03:19,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-20 16:03:19,515 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 538 transitions, 6695 flow [2024-06-20 16:03:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:19,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:19,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:03:19,516 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:19,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1628705161, now seen corresponding path program 1 times [2024-06-20 16:03:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165783850] [2024-06-20 16:03:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:21,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165783850] [2024-06-20 16:03:21,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165783850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:21,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472051595] [2024-06-20 16:03:21,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:21,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:21,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:03:21,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 538 transitions, 6695 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:21,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:21,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:03:21,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:22,574 INFO L124 PetriNetUnfolderBase]: 2704/4380 cut-off events. [2024-06-20 16:03:22,574 INFO L125 PetriNetUnfolderBase]: For 1256010/1256117 co-relation queries the response was YES. [2024-06-20 16:03:22,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58383 conditions, 4380 events. 2704/4380 cut-off events. For 1256010/1256117 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 26178 event pairs, 463 based on Foata normal form. 29/4356 useless extension candidates. Maximal degree in co-relation 58201. Up to 3774 conditions per place. [2024-06-20 16:03:22,650 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 444 selfloop transitions, 59 changer transitions 0/564 dead transitions. [2024-06-20 16:03:22,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 564 transitions, 7917 flow [2024-06-20 16:03:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:03:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-20 16:03:22,651 INFO L175 Difference]: Start difference. First operand has 389 places, 538 transitions, 6695 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:03:22,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 564 transitions, 7917 flow [2024-06-20 16:03:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 564 transitions, 7742 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:26,220 INFO L231 Difference]: Finished difference. Result has 393 places, 543 transitions, 6750 flow [2024-06-20 16:03:26,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6520, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6750, PETRI_PLACES=393, PETRI_TRANSITIONS=543} [2024-06-20 16:03:26,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-20 16:03:26,221 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 543 transitions, 6750 flow [2024-06-20 16:03:26,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:26,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:26,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:26,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:03:26,221 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:26,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash 697049640, now seen corresponding path program 5 times [2024-06-20 16:03:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802492909] [2024-06-20 16:03:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:27,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:27,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802492909] [2024-06-20 16:03:27,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802492909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:27,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:27,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132187575] [2024-06-20 16:03:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:27,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:27,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 543 transitions, 6750 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:28,604 INFO L124 PetriNetUnfolderBase]: 2886/4641 cut-off events. [2024-06-20 16:03:28,604 INFO L125 PetriNetUnfolderBase]: For 1205744/1205744 co-relation queries the response was YES. [2024-06-20 16:03:28,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60539 conditions, 4641 events. 2886/4641 cut-off events. For 1205744/1205744 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 27579 event pairs, 519 based on Foata normal form. 1/4641 useless extension candidates. Maximal degree in co-relation 60355. Up to 4087 conditions per place. [2024-06-20 16:03:28,680 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 487 selfloop transitions, 80 changer transitions 0/572 dead transitions. [2024-06-20 16:03:28,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 572 transitions, 8191 flow [2024-06-20 16:03:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:03:28,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:03:28,681 INFO L175 Difference]: Start difference. First operand has 393 places, 543 transitions, 6750 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:03:28,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 572 transitions, 8191 flow [2024-06-20 16:03:32,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 572 transitions, 8025 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:32,026 INFO L231 Difference]: Finished difference. Result has 395 places, 549 transitions, 6995 flow [2024-06-20 16:03:32,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6995, PETRI_PLACES=395, PETRI_TRANSITIONS=549} [2024-06-20 16:03:32,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 16:03:32,026 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 549 transitions, 6995 flow [2024-06-20 16:03:32,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:32,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:32,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:32,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:03:32,027 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:32,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 24751410, now seen corresponding path program 13 times [2024-06-20 16:03:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293596014] [2024-06-20 16:03:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:33,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:33,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293596014] [2024-06-20 16:03:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293596014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:33,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2595549] [2024-06-20 16:03:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:33,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:33,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:33,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 549 transitions, 6995 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:33,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:33,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:33,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:34,470 INFO L124 PetriNetUnfolderBase]: 2896/4658 cut-off events. [2024-06-20 16:03:34,471 INFO L125 PetriNetUnfolderBase]: For 1236647/1236647 co-relation queries the response was YES. [2024-06-20 16:03:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61145 conditions, 4658 events. 2896/4658 cut-off events. For 1236647/1236647 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 27740 event pairs, 555 based on Foata normal form. 2/4659 useless extension candidates. Maximal degree in co-relation 60960. Up to 4204 conditions per place. [2024-06-20 16:03:34,549 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 510 selfloop transitions, 59 changer transitions 0/574 dead transitions. [2024-06-20 16:03:34,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 574 transitions, 8483 flow [2024-06-20 16:03:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:03:34,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:03:34,550 INFO L175 Difference]: Start difference. First operand has 395 places, 549 transitions, 6995 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:03:34,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 574 transitions, 8483 flow [2024-06-20 16:03:37,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 574 transitions, 8125 flow, removed 102 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:37,865 INFO L231 Difference]: Finished difference. Result has 398 places, 553 transitions, 7000 flow [2024-06-20 16:03:37,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7000, PETRI_PLACES=398, PETRI_TRANSITIONS=553} [2024-06-20 16:03:37,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 16:03:37,865 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 553 transitions, 7000 flow [2024-06-20 16:03:37,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:37,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:37,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:37,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:03:37,866 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:37,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:37,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1493943988, now seen corresponding path program 6 times [2024-06-20 16:03:37,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:37,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122313444] [2024-06-20 16:03:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:37,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:38,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:38,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122313444] [2024-06-20 16:03:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122313444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833682827] [2024-06-20 16:03:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:38,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:38,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 553 transitions, 7000 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:38,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:38,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:38,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:40,415 INFO L124 PetriNetUnfolderBase]: 2901/4665 cut-off events. [2024-06-20 16:03:40,415 INFO L125 PetriNetUnfolderBase]: For 1244854/1244854 co-relation queries the response was YES. [2024-06-20 16:03:40,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61267 conditions, 4665 events. 2901/4665 cut-off events. For 1244854/1244854 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27792 event pairs, 519 based on Foata normal form. 1/4665 useless extension candidates. Maximal degree in co-relation 61081. Up to 4108 conditions per place. [2024-06-20 16:03:40,491 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 79 changer transitions 0/579 dead transitions. [2024-06-20 16:03:40,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 579 transitions, 8432 flow [2024-06-20 16:03:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:03:40,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:03:40,492 INFO L175 Difference]: Start difference. First operand has 398 places, 553 transitions, 7000 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:03:40,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 579 transitions, 8432 flow [2024-06-20 16:03:43,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 579 transitions, 8109 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:43,684 INFO L231 Difference]: Finished difference. Result has 400 places, 556 transitions, 7063 flow [2024-06-20 16:03:43,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7063, PETRI_PLACES=400, PETRI_TRANSITIONS=556} [2024-06-20 16:03:43,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-20 16:03:43,684 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 556 transitions, 7063 flow [2024-06-20 16:03:43,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:43,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:43,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:43,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:03:43,685 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:43,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash 769702990, now seen corresponding path program 7 times [2024-06-20 16:03:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:43,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242323106] [2024-06-20 16:03:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:44,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:44,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242323106] [2024-06-20 16:03:44,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242323106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:44,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:44,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208791790] [2024-06-20 16:03:44,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:44,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 556 transitions, 7063 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:44,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:44,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:44,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:46,210 INFO L124 PetriNetUnfolderBase]: 2906/4674 cut-off events. [2024-06-20 16:03:46,210 INFO L125 PetriNetUnfolderBase]: For 1270043/1270043 co-relation queries the response was YES. [2024-06-20 16:03:46,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61765 conditions, 4674 events. 2906/4674 cut-off events. For 1270043/1270043 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 27865 event pairs, 555 based on Foata normal form. 1/4674 useless extension candidates. Maximal degree in co-relation 61578. Up to 4115 conditions per place. [2024-06-20 16:03:46,291 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 84 changer transitions 0/582 dead transitions. [2024-06-20 16:03:46,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 582 transitions, 8507 flow [2024-06-20 16:03:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:03:46,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:03:46,293 INFO L175 Difference]: Start difference. First operand has 400 places, 556 transitions, 7063 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:03:46,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 582 transitions, 8507 flow [2024-06-20 16:03:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 582 transitions, 8137 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:49,675 INFO L231 Difference]: Finished difference. Result has 402 places, 559 transitions, 7095 flow [2024-06-20 16:03:49,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6693, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7095, PETRI_PLACES=402, PETRI_TRANSITIONS=559} [2024-06-20 16:03:49,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-20 16:03:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 559 transitions, 7095 flow [2024-06-20 16:03:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:49,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:03:49,676 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:49,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1494242890, now seen corresponding path program 5 times [2024-06-20 16:03:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611957205] [2024-06-20 16:03:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:50,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:50,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611957205] [2024-06-20 16:03:50,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611957205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:50,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:50,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239219023] [2024-06-20 16:03:50,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:50,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:50,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:51,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:51,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 559 transitions, 7095 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:51,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:51,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:51,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:52,513 INFO L124 PetriNetUnfolderBase]: 2911/4685 cut-off events. [2024-06-20 16:03:52,513 INFO L125 PetriNetUnfolderBase]: For 1294753/1294759 co-relation queries the response was YES. [2024-06-20 16:03:52,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62288 conditions, 4685 events. 2911/4685 cut-off events. For 1294753/1294759 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 27961 event pairs, 511 based on Foata normal form. 7/4691 useless extension candidates. Maximal degree in co-relation 62100. Up to 4286 conditions per place. [2024-06-20 16:03:52,591 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 41 changer transitions 0/583 dead transitions. [2024-06-20 16:03:52,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 583 transitions, 8511 flow [2024-06-20 16:03:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:03:52,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:03:52,592 INFO L175 Difference]: Start difference. First operand has 402 places, 559 transitions, 7095 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:03:52,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 583 transitions, 8511 flow [2024-06-20 16:03:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 583 transitions, 8117 flow, removed 108 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:56,202 INFO L231 Difference]: Finished difference. Result has 403 places, 562 transitions, 6991 flow [2024-06-20 16:03:56,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6701, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=403, PETRI_TRANSITIONS=562} [2024-06-20 16:03:56,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 16:03:56,203 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 562 transitions, 6991 flow [2024-06-20 16:03:56,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:56,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:56,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:56,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:03:56,204 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:56,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1999966834, now seen corresponding path program 8 times [2024-06-20 16:03:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288754853] [2024-06-20 16:03:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288754853] [2024-06-20 16:03:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288754853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:57,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:57,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651591488] [2024-06-20 16:03:57,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:57,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:57,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:57,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 562 transitions, 6991 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:57,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:57,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:57,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:58,621 INFO L124 PetriNetUnfolderBase]: 2916/4690 cut-off events. [2024-06-20 16:03:58,622 INFO L125 PetriNetUnfolderBase]: For 1317494/1317494 co-relation queries the response was YES. [2024-06-20 16:03:58,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62571 conditions, 4690 events. 2916/4690 cut-off events. For 1317494/1317494 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 27963 event pairs, 519 based on Foata normal form. 1/4690 useless extension candidates. Maximal degree in co-relation 62382. Up to 4120 conditions per place. [2024-06-20 16:03:58,706 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 87 changer transitions 0/585 dead transitions. [2024-06-20 16:03:58,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 585 transitions, 8439 flow [2024-06-20 16:03:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:03:58,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:03:58,708 INFO L175 Difference]: Start difference. First operand has 403 places, 562 transitions, 6991 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:03:58,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 585 transitions, 8439 flow [2024-06-20 16:04:02,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 585 transitions, 8171 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:02,262 INFO L231 Difference]: Finished difference. Result has 405 places, 565 transitions, 7139 flow [2024-06-20 16:04:02,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7139, PETRI_PLACES=405, PETRI_TRANSITIONS=565} [2024-06-20 16:04:02,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-20 16:04:02,263 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 565 transitions, 7139 flow [2024-06-20 16:04:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:02,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:02,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:02,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:04:02,264 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:02,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 252831306, now seen corresponding path program 6 times [2024-06-20 16:04:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400906348] [2024-06-20 16:04:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:03,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400906348] [2024-06-20 16:04:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400906348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:03,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:03,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981752197] [2024-06-20 16:04:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:03,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 565 transitions, 7139 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:03,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:03,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:05,064 INFO L124 PetriNetUnfolderBase]: 2921/4701 cut-off events. [2024-06-20 16:04:05,064 INFO L125 PetriNetUnfolderBase]: For 1343868/1343874 co-relation queries the response was YES. [2024-06-20 16:04:05,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63245 conditions, 4701 events. 2921/4701 cut-off events. For 1343868/1343874 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28054 event pairs, 547 based on Foata normal form. 7/4707 useless extension candidates. Maximal degree in co-relation 63055. Up to 4300 conditions per place. [2024-06-20 16:04:05,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 43 changer transitions 0/589 dead transitions. [2024-06-20 16:04:05,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 589 transitions, 8575 flow [2024-06-20 16:04:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:04:05,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:04:05,142 INFO L175 Difference]: Start difference. First operand has 405 places, 565 transitions, 7139 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:04:05,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 589 transitions, 8575 flow [2024-06-20 16:04:08,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 589 transitions, 8181 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:08,670 INFO L231 Difference]: Finished difference. Result has 407 places, 568 transitions, 7047 flow [2024-06-20 16:04:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7047, PETRI_PLACES=407, PETRI_TRANSITIONS=568} [2024-06-20 16:04:08,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 16:04:08,671 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 568 transitions, 7047 flow [2024-06-20 16:04:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:08,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:08,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:04:08,671 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1497967757, now seen corresponding path program 5 times [2024-06-20 16:04:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723047202] [2024-06-20 16:04:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:09,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:09,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723047202] [2024-06-20 16:04:09,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723047202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:09,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:09,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582525793] [2024-06-20 16:04:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:09,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:09,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:09,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:09,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 568 transitions, 7047 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:09,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:09,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:09,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:11,176 INFO L124 PetriNetUnfolderBase]: 2941/4729 cut-off events. [2024-06-20 16:04:11,176 INFO L125 PetriNetUnfolderBase]: For 1389672/1389678 co-relation queries the response was YES. [2024-06-20 16:04:11,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63829 conditions, 4729 events. 2941/4729 cut-off events. For 1389672/1389678 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28268 event pairs, 509 based on Foata normal form. 10/4738 useless extension candidates. Maximal degree in co-relation 63638. Up to 4351 conditions per place. [2024-06-20 16:04:11,261 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 37 changer transitions 0/592 dead transitions. [2024-06-20 16:04:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 592 transitions, 8529 flow [2024-06-20 16:04:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:04:11,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:04:11,262 INFO L175 Difference]: Start difference. First operand has 407 places, 568 transitions, 7047 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:04:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 592 transitions, 8529 flow [2024-06-20 16:04:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 592 transitions, 8249 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:14,689 INFO L231 Difference]: Finished difference. Result has 409 places, 572 transitions, 7028 flow [2024-06-20 16:04:14,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=409, PETRI_TRANSITIONS=572} [2024-06-20 16:04:14,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-20 16:04:14,690 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 572 transitions, 7028 flow [2024-06-20 16:04:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:14,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:14,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:04:14,690 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:14,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1996241812, now seen corresponding path program 7 times [2024-06-20 16:04:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:14,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059352326] [2024-06-20 16:04:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:14,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059352326] [2024-06-20 16:04:15,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059352326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:15,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:15,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:15,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483304638] [2024-06-20 16:04:15,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:15,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:15,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:16,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:16,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 572 transitions, 7028 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:16,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:16,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:16,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:17,406 INFO L124 PetriNetUnfolderBase]: 2938/4723 cut-off events. [2024-06-20 16:04:17,406 INFO L125 PetriNetUnfolderBase]: For 1371608/1371614 co-relation queries the response was YES. [2024-06-20 16:04:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63590 conditions, 4723 events. 2938/4723 cut-off events. For 1371608/1371614 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28200 event pairs, 509 based on Foata normal form. 7/4729 useless extension candidates. Maximal degree in co-relation 63398. Up to 4356 conditions per place. [2024-06-20 16:04:17,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 550 selfloop transitions, 36 changer transitions 0/591 dead transitions. [2024-06-20 16:04:17,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 591 transitions, 8316 flow [2024-06-20 16:04:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:04:17,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:04:17,488 INFO L175 Difference]: Start difference. First operand has 409 places, 572 transitions, 7028 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:04:17,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 591 transitions, 8316 flow [2024-06-20 16:04:21,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 591 transitions, 8005 flow, removed 121 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:21,212 INFO L231 Difference]: Finished difference. Result has 411 places, 572 transitions, 6795 flow [2024-06-20 16:04:21,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6795, PETRI_PLACES=411, PETRI_TRANSITIONS=572} [2024-06-20 16:04:21,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 16:04:21,213 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 572 transitions, 6795 flow [2024-06-20 16:04:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:21,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:04:21,213 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:21,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1996253158, now seen corresponding path program 14 times [2024-06-20 16:04:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:21,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288825086] [2024-06-20 16:04:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:21,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:22,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:22,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288825086] [2024-06-20 16:04:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288825086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322762807] [2024-06-20 16:04:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:22,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:22,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:22,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 572 transitions, 6795 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:22,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:22,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:22,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:23,649 INFO L124 PetriNetUnfolderBase]: 2948/4737 cut-off events. [2024-06-20 16:04:23,649 INFO L125 PetriNetUnfolderBase]: For 1393866/1393866 co-relation queries the response was YES. [2024-06-20 16:04:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63630 conditions, 4737 events. 2948/4737 cut-off events. For 1393866/1393866 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28322 event pairs, 517 based on Foata normal form. 2/4738 useless extension candidates. Maximal degree in co-relation 63437. Up to 4263 conditions per place. [2024-06-20 16:04:23,731 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 526 selfloop transitions, 64 changer transitions 0/595 dead transitions. [2024-06-20 16:04:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 595 transitions, 8385 flow [2024-06-20 16:04:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:04:23,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:04:23,732 INFO L175 Difference]: Start difference. First operand has 411 places, 572 transitions, 6795 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:04:23,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 595 transitions, 8385 flow [2024-06-20 16:04:27,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 595 transitions, 8240 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:27,800 INFO L231 Difference]: Finished difference. Result has 412 places, 576 transitions, 7031 flow [2024-06-20 16:04:27,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7031, PETRI_PLACES=412, PETRI_TRANSITIONS=576} [2024-06-20 16:04:27,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 16:04:27,800 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 576 transitions, 7031 flow [2024-06-20 16:04:27,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:27,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:27,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:27,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:04:27,801 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:27,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1806027424, now seen corresponding path program 9 times [2024-06-20 16:04:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:27,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396485693] [2024-06-20 16:04:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:27,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396485693] [2024-06-20 16:04:28,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396485693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:28,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:28,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:28,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423728882] [2024-06-20 16:04:28,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:28,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:28,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:28,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:28,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:28,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 576 transitions, 7031 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:28,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:30,340 INFO L124 PetriNetUnfolderBase]: 2953/4746 cut-off events. [2024-06-20 16:04:30,340 INFO L125 PetriNetUnfolderBase]: For 1406963/1406963 co-relation queries the response was YES. [2024-06-20 16:04:30,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64079 conditions, 4746 events. 2953/4746 cut-off events. For 1406963/1406963 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 28362 event pairs, 555 based on Foata normal form. 1/4746 useless extension candidates. Maximal degree in co-relation 63885. Up to 4175 conditions per place. [2024-06-20 16:04:30,424 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 89 changer transitions 0/599 dead transitions. [2024-06-20 16:04:30,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 599 transitions, 8515 flow [2024-06-20 16:04:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:04:30,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:04:30,425 INFO L175 Difference]: Start difference. First operand has 412 places, 576 transitions, 7031 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:04:30,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 599 transitions, 8515 flow [2024-06-20 16:04:34,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 599 transitions, 8174 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:34,403 INFO L231 Difference]: Finished difference. Result has 414 places, 579 transitions, 7118 flow [2024-06-20 16:04:34,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6690, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7118, PETRI_PLACES=414, PETRI_TRANSITIONS=579} [2024-06-20 16:04:34,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 16:04:34,403 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 579 transitions, 7118 flow [2024-06-20 16:04:34,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:34,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:34,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:34,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:04:34,404 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:34,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1795837972, now seen corresponding path program 8 times [2024-06-20 16:04:34,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:34,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683084837] [2024-06-20 16:04:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:34,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:35,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:35,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683084837] [2024-06-20 16:04:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683084837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:35,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:35,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:35,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601933060] [2024-06-20 16:04:35,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:35,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:35,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:35,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 579 transitions, 7118 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:35,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:35,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:35,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:37,285 INFO L124 PetriNetUnfolderBase]: 2966/4770 cut-off events. [2024-06-20 16:04:37,286 INFO L125 PetriNetUnfolderBase]: For 1446263/1446269 co-relation queries the response was YES. [2024-06-20 16:04:37,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65046 conditions, 4770 events. 2966/4770 cut-off events. For 1446263/1446269 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28525 event pairs, 511 based on Foata normal form. 7/4776 useless extension candidates. Maximal degree in co-relation 64851. Up to 4335 conditions per place. [2024-06-20 16:04:37,371 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 534 selfloop transitions, 67 changer transitions 0/606 dead transitions. [2024-06-20 16:04:37,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 606 transitions, 9078 flow [2024-06-20 16:04:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:04:37,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:04:37,372 INFO L175 Difference]: Start difference. First operand has 414 places, 579 transitions, 7118 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:04:37,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 606 transitions, 9078 flow [2024-06-20 16:04:41,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 606 transitions, 8672 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:41,838 INFO L231 Difference]: Finished difference. Result has 417 places, 587 transitions, 7319 flow [2024-06-20 16:04:41,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7319, PETRI_PLACES=417, PETRI_TRANSITIONS=587} [2024-06-20 16:04:41,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-20 16:04:41,839 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 587 transitions, 7319 flow [2024-06-20 16:04:41,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:41,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:41,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:04:41,839 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:41,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1996241998, now seen corresponding path program 15 times [2024-06-20 16:04:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:41,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152322716] [2024-06-20 16:04:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:42,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:42,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152322716] [2024-06-20 16:04:42,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152322716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:42,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621727188] [2024-06-20 16:04:42,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:42,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:42,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 587 transitions, 7319 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:42,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:42,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:42,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:44,316 INFO L124 PetriNetUnfolderBase]: 2960/4756 cut-off events. [2024-06-20 16:04:44,316 INFO L125 PetriNetUnfolderBase]: For 1458723/1458723 co-relation queries the response was YES. [2024-06-20 16:04:44,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64725 conditions, 4756 events. 2960/4756 cut-off events. For 1458723/1458723 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28427 event pairs, 519 based on Foata normal form. 2/4757 useless extension candidates. Maximal degree in co-relation 64528. Up to 4262 conditions per place. [2024-06-20 16:04:44,398 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 525 selfloop transitions, 75 changer transitions 0/605 dead transitions. [2024-06-20 16:04:44,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 605 transitions, 8629 flow [2024-06-20 16:04:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:04:44,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:04:44,399 INFO L175 Difference]: Start difference. First operand has 417 places, 587 transitions, 7319 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:04:44,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 605 transitions, 8629 flow [2024-06-20 16:04:48,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 605 transitions, 8312 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:48,835 INFO L231 Difference]: Finished difference. Result has 421 places, 587 transitions, 7159 flow [2024-06-20 16:04:48,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7159, PETRI_PLACES=421, PETRI_TRANSITIONS=587} [2024-06-20 16:04:48,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 16:04:48,836 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 587 transitions, 7159 flow [2024-06-20 16:04:48,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:48,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:48,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:48,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:04:48,836 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:48,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 906826950, now seen corresponding path program 10 times [2024-06-20 16:04:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138985607] [2024-06-20 16:04:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:49,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138985607] [2024-06-20 16:04:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138985607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:49,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180970596] [2024-06-20 16:04:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:49,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 587 transitions, 7159 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:49,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:49,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:49,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:51,518 INFO L124 PetriNetUnfolderBase]: 2957/4752 cut-off events. [2024-06-20 16:04:51,518 INFO L125 PetriNetUnfolderBase]: For 1451917/1451917 co-relation queries the response was YES. [2024-06-20 16:04:51,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64531 conditions, 4752 events. 2957/4752 cut-off events. For 1451917/1451917 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28380 event pairs, 555 based on Foata normal form. 1/4752 useless extension candidates. Maximal degree in co-relation 64332. Up to 4143 conditions per place. [2024-06-20 16:04:51,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 481 selfloop transitions, 121 changer transitions 0/607 dead transitions. [2024-06-20 16:04:51,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 607 transitions, 8657 flow [2024-06-20 16:04:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:04:51,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:04:51,594 INFO L175 Difference]: Start difference. First operand has 421 places, 587 transitions, 7159 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:04:51,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 607 transitions, 8657 flow [2024-06-20 16:04:55,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 607 transitions, 8088 flow, removed 113 selfloop flow, removed 12 redundant places. [2024-06-20 16:04:55,403 INFO L231 Difference]: Finished difference. Result has 418 places, 590 transitions, 7090 flow [2024-06-20 16:04:55,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7090, PETRI_PLACES=418, PETRI_TRANSITIONS=590} [2024-06-20 16:04:55,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 16:04:55,404 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 590 transitions, 7090 flow [2024-06-20 16:04:55,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:55,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:55,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:55,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:04:55,405 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:55,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1124264932, now seen corresponding path program 9 times [2024-06-20 16:04:55,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:55,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911746344] [2024-06-20 16:04:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:56,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911746344] [2024-06-20 16:04:56,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911746344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:56,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:56,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:56,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321583959] [2024-06-20 16:04:56,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:56,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:56,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 590 transitions, 7090 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:56,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:56,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:56,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:58,111 INFO L124 PetriNetUnfolderBase]: 2954/4752 cut-off events. [2024-06-20 16:04:58,111 INFO L125 PetriNetUnfolderBase]: For 1465011/1465017 co-relation queries the response was YES. [2024-06-20 16:04:58,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64186 conditions, 4752 events. 2954/4752 cut-off events. For 1465011/1465017 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28410 event pairs, 511 based on Foata normal form. 7/4758 useless extension candidates. Maximal degree in co-relation 63990. Up to 4335 conditions per place. [2024-06-20 16:04:58,190 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 550 selfloop transitions, 54 changer transitions 0/609 dead transitions. [2024-06-20 16:04:58,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 609 transitions, 8397 flow [2024-06-20 16:04:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:04:58,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:04:58,191 INFO L175 Difference]: Start difference. First operand has 418 places, 590 transitions, 7090 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:04:58,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 609 transitions, 8397 flow [2024-06-20 16:05:02,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 609 transitions, 7741 flow, removed 209 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:02,507 INFO L231 Difference]: Finished difference. Result has 420 places, 591 transitions, 6595 flow [2024-06-20 16:05:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6468, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6595, PETRI_PLACES=420, PETRI_TRANSITIONS=591} [2024-06-20 16:05:02,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-20 16:05:02,507 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 591 transitions, 6595 flow [2024-06-20 16:05:02,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:02,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:02,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:02,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:05:02,508 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:02,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:02,508 INFO L85 PathProgramCache]: Analyzing trace with hash -170558288, now seen corresponding path program 16 times [2024-06-20 16:05:02,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:02,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133110525] [2024-06-20 16:05:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:02,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133110525] [2024-06-20 16:05:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133110525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:03,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783171469] [2024-06-20 16:05:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:03,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:03,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 591 transitions, 6595 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:03,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:03,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:03,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:05,103 INFO L124 PetriNetUnfolderBase]: 2964/4762 cut-off events. [2024-06-20 16:05:05,104 INFO L125 PetriNetUnfolderBase]: For 1489601/1489601 co-relation queries the response was YES. [2024-06-20 16:05:05,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64123 conditions, 4762 events. 2964/4762 cut-off events. For 1489601/1489601 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 28467 event pairs, 517 based on Foata normal form. 2/4763 useless extension candidates. Maximal degree in co-relation 63926. Up to 4218 conditions per place. [2024-06-20 16:05:05,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 518 selfloop transitions, 89 changer transitions 0/612 dead transitions. [2024-06-20 16:05:05,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 612 transitions, 8327 flow [2024-06-20 16:05:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:05:05,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:05:05,187 INFO L175 Difference]: Start difference. First operand has 420 places, 591 transitions, 6595 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:05:05,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 612 transitions, 8327 flow [2024-06-20 16:05:10,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 612 transitions, 8203 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:10,200 INFO L231 Difference]: Finished difference. Result has 422 places, 595 transitions, 6958 flow [2024-06-20 16:05:10,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6958, PETRI_PLACES=422, PETRI_TRANSITIONS=595} [2024-06-20 16:05:10,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 16:05:10,201 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 595 transitions, 6958 flow [2024-06-20 16:05:10,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:10,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:10,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:10,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:05:10,202 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:10,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1741468658, now seen corresponding path program 17 times [2024-06-20 16:05:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:10,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422553245] [2024-06-20 16:05:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:11,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422553245] [2024-06-20 16:05:11,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422553245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:11,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:11,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743802897] [2024-06-20 16:05:11,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:11,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:11,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:11,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:11,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 595 transitions, 6958 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:11,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:11,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:12,670 INFO L124 PetriNetUnfolderBase]: 2974/4780 cut-off events. [2024-06-20 16:05:12,670 INFO L125 PetriNetUnfolderBase]: For 1528381/1528381 co-relation queries the response was YES. [2024-06-20 16:05:12,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65351 conditions, 4780 events. 2974/4780 cut-off events. For 1528381/1528381 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28595 event pairs, 553 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 65153. Up to 4220 conditions per place. [2024-06-20 16:05:12,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 96 changer transitions 0/615 dead transitions. [2024-06-20 16:05:12,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 615 transitions, 8646 flow [2024-06-20 16:05:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:05:12,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:05:12,751 INFO L175 Difference]: Start difference. First operand has 422 places, 595 transitions, 6958 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:05:12,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 615 transitions, 8646 flow [2024-06-20 16:05:17,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 615 transitions, 8187 flow, removed 143 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:17,248 INFO L231 Difference]: Finished difference. Result has 424 places, 599 transitions, 7008 flow [2024-06-20 16:05:17,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7008, PETRI_PLACES=424, PETRI_TRANSITIONS=599} [2024-06-20 16:05:17,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-20 16:05:17,250 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 599 transitions, 7008 flow [2024-06-20 16:05:17,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:17,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:17,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:17,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:05:17,250 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:17,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash -391893284, now seen corresponding path program 18 times [2024-06-20 16:05:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997577325] [2024-06-20 16:05:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997577325] [2024-06-20 16:05:18,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997577325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:18,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:18,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747292511] [2024-06-20 16:05:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:18,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:18,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 599 transitions, 7008 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:18,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:18,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:18,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:19,770 INFO L124 PetriNetUnfolderBase]: 2984/4798 cut-off events. [2024-06-20 16:05:19,771 INFO L125 PetriNetUnfolderBase]: For 1560834/1560834 co-relation queries the response was YES. [2024-06-20 16:05:19,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66097 conditions, 4798 events. 2984/4798 cut-off events. For 1560834/1560834 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28694 event pairs, 517 based on Foata normal form. 2/4799 useless extension candidates. Maximal degree in co-relation 65898. Up to 4150 conditions per place. [2024-06-20 16:05:19,852 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 471 selfloop transitions, 143 changer transitions 0/619 dead transitions. [2024-06-20 16:05:19,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 619 transitions, 8928 flow [2024-06-20 16:05:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:05:19,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:05:19,853 INFO L175 Difference]: Start difference. First operand has 424 places, 599 transitions, 7008 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:05:19,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 619 transitions, 8928 flow [2024-06-20 16:05:25,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 619 transitions, 8447 flow, removed 147 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:25,217 INFO L231 Difference]: Finished difference. Result has 426 places, 603 transitions, 7138 flow [2024-06-20 16:05:25,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6527, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7138, PETRI_PLACES=426, PETRI_TRANSITIONS=603} [2024-06-20 16:05:25,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-20 16:05:25,218 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 603 transitions, 7138 flow [2024-06-20 16:05:25,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:25,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:25,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:25,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:05:25,218 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:25,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash -404780108, now seen corresponding path program 10 times [2024-06-20 16:05:25,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:25,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052345806] [2024-06-20 16:05:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:26,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052345806] [2024-06-20 16:05:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052345806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:26,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:26,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:26,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15802872] [2024-06-20 16:05:26,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:26,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:26,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 603 transitions, 7138 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:26,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:26,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:26,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:28,164 INFO L124 PetriNetUnfolderBase]: 2989/4811 cut-off events. [2024-06-20 16:05:28,164 INFO L125 PetriNetUnfolderBase]: For 1580398/1580404 co-relation queries the response was YES. [2024-06-20 16:05:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66745 conditions, 4811 events. 2989/4811 cut-off events. For 1580398/1580404 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28899 event pairs, 541 based on Foata normal form. 7/4817 useless extension candidates. Maximal degree in co-relation 66545. Up to 4402 conditions per place. [2024-06-20 16:05:28,247 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 569 selfloop transitions, 49 changer transitions 0/623 dead transitions. [2024-06-20 16:05:28,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 623 transitions, 8786 flow [2024-06-20 16:05:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:05:28,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:05:28,248 INFO L175 Difference]: Start difference. First operand has 426 places, 603 transitions, 7138 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:05:28,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 623 transitions, 8786 flow [2024-06-20 16:05:33,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 623 transitions, 8203 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:33,593 INFO L231 Difference]: Finished difference. Result has 428 places, 606 transitions, 6897 flow [2024-06-20 16:05:33,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6897, PETRI_PLACES=428, PETRI_TRANSITIONS=606} [2024-06-20 16:05:33,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-20 16:05:33,594 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 606 transitions, 6897 flow [2024-06-20 16:05:33,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:33,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:33,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:05:33,594 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:33,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash -391447411, now seen corresponding path program 6 times [2024-06-20 16:05:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:33,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446111100] [2024-06-20 16:05:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:34,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:34,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446111100] [2024-06-20 16:05:34,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446111100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:34,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:34,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71307480] [2024-06-20 16:05:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:34,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:34,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 606 transitions, 6897 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:34,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:34,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:36,269 INFO L124 PetriNetUnfolderBase]: 3009/4838 cut-off events. [2024-06-20 16:05:36,269 INFO L125 PetriNetUnfolderBase]: For 1637942/1637942 co-relation queries the response was YES. [2024-06-20 16:05:36,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67157 conditions, 4838 events. 3009/4838 cut-off events. For 1637942/1637942 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 29089 event pairs, 539 based on Foata normal form. 4/4841 useless extension candidates. Maximal degree in co-relation 66956. Up to 4483 conditions per place. [2024-06-20 16:05:36,355 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 591 selfloop transitions, 29 changer transitions 0/625 dead transitions. [2024-06-20 16:05:36,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 625 transitions, 8457 flow [2024-06-20 16:05:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:05:36,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:05:36,356 INFO L175 Difference]: Start difference. First operand has 428 places, 606 transitions, 6897 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:05:36,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 625 transitions, 8457 flow [2024-06-20 16:05:41,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 625 transitions, 8137 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:41,658 INFO L231 Difference]: Finished difference. Result has 430 places, 610 transitions, 6913 flow [2024-06-20 16:05:41,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6913, PETRI_PLACES=430, PETRI_TRANSITIONS=610} [2024-06-20 16:05:41,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-20 16:05:41,658 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 610 transitions, 6913 flow [2024-06-20 16:05:41,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:41,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:41,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:41,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:05:41,659 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:41,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash 408864846, now seen corresponding path program 11 times [2024-06-20 16:05:41,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:41,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259918522] [2024-06-20 16:05:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:41,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:42,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259918522] [2024-06-20 16:05:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259918522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:42,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:42,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306263265] [2024-06-20 16:05:42,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:42,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:43,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:43,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 610 transitions, 6913 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:43,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:43,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:43,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:44,717 INFO L124 PetriNetUnfolderBase]: 3022/4859 cut-off events. [2024-06-20 16:05:44,717 INFO L125 PetriNetUnfolderBase]: For 1651976/1651982 co-relation queries the response was YES. [2024-06-20 16:05:44,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68245 conditions, 4859 events. 3022/4859 cut-off events. For 1651976/1651982 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29216 event pairs, 505 based on Foata normal form. 7/4865 useless extension candidates. Maximal degree in co-relation 68043. Up to 4404 conditions per place. [2024-06-20 16:05:44,793 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 74 changer transitions 0/636 dead transitions. [2024-06-20 16:05:44,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 636 transitions, 9135 flow [2024-06-20 16:05:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:05:44,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:05:44,795 INFO L175 Difference]: Start difference. First operand has 430 places, 610 transitions, 6913 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:05:44,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 636 transitions, 9135 flow [2024-06-20 16:05:50,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 636 transitions, 8833 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:50,227 INFO L231 Difference]: Finished difference. Result has 433 places, 619 transitions, 7367 flow [2024-06-20 16:05:50,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6611, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7367, PETRI_PLACES=433, PETRI_TRANSITIONS=619} [2024-06-20 16:05:50,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-20 16:05:50,227 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 619 transitions, 7367 flow [2024-06-20 16:05:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:50,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:50,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:50,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:05:50,228 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:50,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 395978053, now seen corresponding path program 7 times [2024-06-20 16:05:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:50,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189434310] [2024-06-20 16:05:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:50,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:51,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189434310] [2024-06-20 16:05:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189434310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:51,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:51,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609828161] [2024-06-20 16:05:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:51,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:51,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:51,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 619 transitions, 7367 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:51,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:51,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:51,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:52,987 INFO L124 PetriNetUnfolderBase]: 3042/4889 cut-off events. [2024-06-20 16:05:52,987 INFO L125 PetriNetUnfolderBase]: For 1710072/1710078 co-relation queries the response was YES. [2024-06-20 16:05:53,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69027 conditions, 4889 events. 3042/4889 cut-off events. For 1710072/1710078 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29412 event pairs, 505 based on Foata normal form. 10/4898 useless extension candidates. Maximal degree in co-relation 68823. Up to 4467 conditions per place. [2024-06-20 16:05:53,069 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 586 selfloop transitions, 50 changer transitions 0/641 dead transitions. [2024-06-20 16:05:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 641 transitions, 9117 flow [2024-06-20 16:05:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:05:53,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:05:53,070 INFO L175 Difference]: Start difference. First operand has 433 places, 619 transitions, 7367 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:05:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 641 transitions, 9117 flow [2024-06-20 16:05:58,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 641 transitions, 8736 flow, removed 166 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:58,670 INFO L231 Difference]: Finished difference. Result has 438 places, 623 transitions, 7375 flow [2024-06-20 16:05:58,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7375, PETRI_PLACES=438, PETRI_TRANSITIONS=623} [2024-06-20 16:05:58,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 16:05:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 623 transitions, 7375 flow [2024-06-20 16:05:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:58,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:58,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:58,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:05:58,672 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:58,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash 409101996, now seen corresponding path program 12 times [2024-06-20 16:05:58,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:58,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909950699] [2024-06-20 16:05:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:58,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:00,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:00,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909950699] [2024-06-20 16:06:00,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909950699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:00,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:00,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404462976] [2024-06-20 16:06:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:00,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:00,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:00,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:00,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 623 transitions, 7375 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:00,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:00,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:00,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:01,738 INFO L124 PetriNetUnfolderBase]: 3039/4889 cut-off events. [2024-06-20 16:06:01,738 INFO L125 PetriNetUnfolderBase]: For 1691858/1691864 co-relation queries the response was YES. [2024-06-20 16:06:01,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69178 conditions, 4889 events. 3039/4889 cut-off events. For 1691858/1691864 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29505 event pairs, 505 based on Foata normal form. 7/4895 useless extension candidates. Maximal degree in co-relation 68972. Up to 4429 conditions per place. [2024-06-20 16:06:01,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 77 changer transitions 0/639 dead transitions. [2024-06-20 16:06:01,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 639 transitions, 8759 flow [2024-06-20 16:06:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:06:01,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:06:01,826 INFO L175 Difference]: Start difference. First operand has 438 places, 623 transitions, 7375 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:06:01,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 639 transitions, 8759 flow [2024-06-20 16:06:07,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 639 transitions, 8224 flow, removed 220 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:07,310 INFO L231 Difference]: Finished difference. Result has 440 places, 623 transitions, 7000 flow [2024-06-20 16:06:07,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6840, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7000, PETRI_PLACES=440, PETRI_TRANSITIONS=623} [2024-06-20 16:06:07,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 16:06:07,311 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 623 transitions, 7000 flow [2024-06-20 16:06:07,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:07,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:07,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:06:07,311 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:07,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1813829237, now seen corresponding path program 8 times [2024-06-20 16:06:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844145528] [2024-06-20 16:06:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844145528] [2024-06-20 16:06:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844145528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:08,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925273295] [2024-06-20 16:06:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:08,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:08,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 623 transitions, 7000 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:08,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:08,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:10,055 INFO L124 PetriNetUnfolderBase]: 3049/4899 cut-off events. [2024-06-20 16:06:10,055 INFO L125 PetriNetUnfolderBase]: For 1709997/1710003 co-relation queries the response was YES. [2024-06-20 16:06:10,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68929 conditions, 4899 events. 3049/4899 cut-off events. For 1709997/1710003 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29442 event pairs, 504 based on Foata normal form. 8/4906 useless extension candidates. Maximal degree in co-relation 68722. Up to 4425 conditions per place. [2024-06-20 16:06:10,143 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 574 selfloop transitions, 78 changer transitions 0/657 dead transitions. [2024-06-20 16:06:10,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 657 transitions, 8834 flow [2024-06-20 16:06:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:06:10,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:06:10,144 INFO L175 Difference]: Start difference. First operand has 440 places, 623 transitions, 7000 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:06:10,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 657 transitions, 8834 flow [2024-06-20 16:06:15,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 657 transitions, 8679 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:15,434 INFO L231 Difference]: Finished difference. Result has 444 places, 641 transitions, 7496 flow [2024-06-20 16:06:15,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6845, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7496, PETRI_PLACES=444, PETRI_TRANSITIONS=641} [2024-06-20 16:06:15,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-20 16:06:15,435 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 641 transitions, 7496 flow [2024-06-20 16:06:15,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:15,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:15,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:15,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:06:15,436 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:15,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -993319081, now seen corresponding path program 9 times [2024-06-20 16:06:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:15,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701230288] [2024-06-20 16:06:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:16,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701230288] [2024-06-20 16:06:16,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701230288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:16,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:16,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177487605] [2024-06-20 16:06:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:16,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 641 transitions, 7496 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:16,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:16,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:16,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:18,105 INFO L124 PetriNetUnfolderBase]: 3123/5005 cut-off events. [2024-06-20 16:06:18,105 INFO L125 PetriNetUnfolderBase]: For 1856465/1856473 co-relation queries the response was YES. [2024-06-20 16:06:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73541 conditions, 5005 events. 3123/5005 cut-off events. For 1856465/1856473 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30116 event pairs, 508 based on Foata normal form. 10/5014 useless extension candidates. Maximal degree in co-relation 73331. Up to 4201 conditions per place. [2024-06-20 16:06:18,197 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 194 changer transitions 0/684 dead transitions. [2024-06-20 16:06:18,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 684 transitions, 10880 flow [2024-06-20 16:06:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:06:18,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:06:18,198 INFO L175 Difference]: Start difference. First operand has 444 places, 641 transitions, 7496 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:06:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 684 transitions, 10880 flow [2024-06-20 16:06:23,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 684 transitions, 10517 flow, removed 157 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:23,582 INFO L231 Difference]: Finished difference. Result has 451 places, 662 transitions, 8712 flow [2024-06-20 16:06:23,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8712, PETRI_PLACES=451, PETRI_TRANSITIONS=662} [2024-06-20 16:06:23,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 16:06:23,583 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 662 transitions, 8712 flow [2024-06-20 16:06:23,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:23,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:23,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:23,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:06:23,583 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:23,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1827934300, now seen corresponding path program 13 times [2024-06-20 16:06:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:23,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556463086] [2024-06-20 16:06:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:23,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556463086] [2024-06-20 16:06:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556463086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:24,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153830672] [2024-06-20 16:06:24,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:25,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:25,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 662 transitions, 8712 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:25,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:25,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:26,508 INFO L124 PetriNetUnfolderBase]: 3136/5023 cut-off events. [2024-06-20 16:06:26,508 INFO L125 PetriNetUnfolderBase]: For 1900172/1900180 co-relation queries the response was YES. [2024-06-20 16:06:26,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75466 conditions, 5023 events. 3136/5023 cut-off events. For 1900172/1900180 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30292 event pairs, 512 based on Foata normal form. 9/5031 useless extension candidates. Maximal degree in co-relation 75252. Up to 4417 conditions per place. [2024-06-20 16:06:26,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 536 selfloop transitions, 148 changer transitions 0/689 dead transitions. [2024-06-20 16:06:26,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 689 transitions, 11508 flow [2024-06-20 16:06:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:06:26,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:06:26,607 INFO L175 Difference]: Start difference. First operand has 451 places, 662 transitions, 8712 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:06:26,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 689 transitions, 11508 flow [2024-06-20 16:06:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 689 transitions, 11074 flow, removed 206 selfloop flow, removed 2 redundant places. [2024-06-20 16:06:32,235 INFO L231 Difference]: Finished difference. Result has 459 places, 675 transitions, 9480 flow [2024-06-20 16:06:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9480, PETRI_PLACES=459, PETRI_TRANSITIONS=675} [2024-06-20 16:06:32,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 16:06:32,236 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 675 transitions, 9480 flow [2024-06-20 16:06:32,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:32,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:32,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:32,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:06:32,236 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:32,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2046749537, now seen corresponding path program 10 times [2024-06-20 16:06:32,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:32,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178807851] [2024-06-20 16:06:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:32,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:33,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:33,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178807851] [2024-06-20 16:06:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178807851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:33,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:33,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073002719] [2024-06-20 16:06:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:33,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:33,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:33,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:33,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 675 transitions, 9480 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:33,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:33,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:35,156 INFO L124 PetriNetUnfolderBase]: 3156/5039 cut-off events. [2024-06-20 16:06:35,156 INFO L125 PetriNetUnfolderBase]: For 1926670/1926672 co-relation queries the response was YES. [2024-06-20 16:06:35,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75124 conditions, 5039 events. 3156/5039 cut-off events. For 1926670/1926672 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 30276 event pairs, 527 based on Foata normal form. 6/5044 useless extension candidates. Maximal degree in co-relation 74907. Up to 4678 conditions per place. [2024-06-20 16:06:35,251 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 649 selfloop transitions, 37 changer transitions 0/691 dead transitions. [2024-06-20 16:06:35,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 691 transitions, 11138 flow [2024-06-20 16:06:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:06:35,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 16:06:35,252 INFO L175 Difference]: Start difference. First operand has 459 places, 675 transitions, 9480 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:06:35,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 691 transitions, 11138 flow [2024-06-20 16:06:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 691 transitions, 10753 flow, removed 157 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:41,428 INFO L231 Difference]: Finished difference. Result has 465 places, 679 transitions, 9421 flow [2024-06-20 16:06:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9421, PETRI_PLACES=465, PETRI_TRANSITIONS=679} [2024-06-20 16:06:41,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-20 16:06:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 679 transitions, 9421 flow [2024-06-20 16:06:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:41,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:06:41,429 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:41,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1193727974, now seen corresponding path program 19 times [2024-06-20 16:06:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744422731] [2024-06-20 16:06:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744422731] [2024-06-20 16:06:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744422731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322606781] [2024-06-20 16:06:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:42,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:42,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 679 transitions, 9421 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:42,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:42,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:42,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:44,263 INFO L124 PetriNetUnfolderBase]: 3166/5059 cut-off events. [2024-06-20 16:06:44,263 INFO L125 PetriNetUnfolderBase]: For 1926945/1926947 co-relation queries the response was YES. [2024-06-20 16:06:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75553 conditions, 5059 events. 3166/5059 cut-off events. For 1926945/1926947 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 30380 event pairs, 541 based on Foata normal form. 4/5062 useless extension candidates. Maximal degree in co-relation 75334. Up to 4388 conditions per place. [2024-06-20 16:06:44,367 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 126 changer transitions 0/699 dead transitions. [2024-06-20 16:06:44,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 699 transitions, 11395 flow [2024-06-20 16:06:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:06:44,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:06:44,368 INFO L175 Difference]: Start difference. First operand has 465 places, 679 transitions, 9421 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:06:44,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 699 transitions, 11395 flow [2024-06-20 16:06:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 699 transitions, 11115 flow, removed 106 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:51,181 INFO L231 Difference]: Finished difference. Result has 466 places, 683 transitions, 9746 flow [2024-06-20 16:06:51,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9141, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9746, PETRI_PLACES=466, PETRI_TRANSITIONS=683} [2024-06-20 16:06:51,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-20 16:06:51,182 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 683 transitions, 9746 flow [2024-06-20 16:06:51,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:51,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:51,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:51,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:06:51,183 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:51,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2033416840, now seen corresponding path program 14 times [2024-06-20 16:06:51,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:51,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360661876] [2024-06-20 16:06:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:51,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:52,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360661876] [2024-06-20 16:06:52,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360661876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:52,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379567466] [2024-06-20 16:06:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:52,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:52,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 683 transitions, 9746 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:52,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:52,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:52,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:54,788 INFO L124 PetriNetUnfolderBase]: 3171/5072 cut-off events. [2024-06-20 16:06:54,788 INFO L125 PetriNetUnfolderBase]: For 1947266/1947274 co-relation queries the response was YES. [2024-06-20 16:06:54,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76219 conditions, 5072 events. 3171/5072 cut-off events. For 1947266/1947274 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 30571 event pairs, 510 based on Foata normal form. 9/5080 useless extension candidates. Maximal degree in co-relation 75999. Up to 4609 conditions per place. [2024-06-20 16:06:54,873 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 624 selfloop transitions, 71 changer transitions 0/700 dead transitions. [2024-06-20 16:06:54,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 700 transitions, 11431 flow [2024-06-20 16:06:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:06:54,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:06:54,874 INFO L175 Difference]: Start difference. First operand has 466 places, 683 transitions, 9746 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:06:54,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 700 transitions, 11431 flow [2024-06-20 16:07:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 700 transitions, 10854 flow, removed 165 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:01,165 INFO L231 Difference]: Finished difference. Result has 468 places, 686 transitions, 9568 flow [2024-06-20 16:07:01,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9568, PETRI_PLACES=468, PETRI_TRANSITIONS=686} [2024-06-20 16:07:01,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 16:07:01,166 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 686 transitions, 9568 flow [2024-06-20 16:07:01,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:01,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:01,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:01,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:07:01,166 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:01,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 954809043, now seen corresponding path program 11 times [2024-06-20 16:07:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:01,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993292040] [2024-06-20 16:07:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993292040] [2024-06-20 16:07:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993292040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:02,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:02,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880064480] [2024-06-20 16:07:02,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:02,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:02,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 686 transitions, 9568 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:02,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:02,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:02,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:04,015 INFO L124 PetriNetUnfolderBase]: 3191/5098 cut-off events. [2024-06-20 16:07:04,015 INFO L125 PetriNetUnfolderBase]: For 2001323/2001331 co-relation queries the response was YES. [2024-06-20 16:07:04,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76490 conditions, 5098 events. 3191/5098 cut-off events. For 2001323/2001331 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 30691 event pairs, 510 based on Foata normal form. 12/5109 useless extension candidates. Maximal degree in co-relation 76269. Up to 4628 conditions per place. [2024-06-20 16:07:04,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 628 selfloop transitions, 72 changer transitions 0/705 dead transitions. [2024-06-20 16:07:04,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 705 transitions, 11314 flow [2024-06-20 16:07:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:07:04,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:07:04,115 INFO L175 Difference]: Start difference. First operand has 468 places, 686 transitions, 9568 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:07:04,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 705 transitions, 11314 flow [2024-06-20 16:07:10,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 705 transitions, 10946 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:10,200 INFO L231 Difference]: Finished difference. Result has 470 places, 690 transitions, 9633 flow [2024-06-20 16:07:10,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9200, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9633, PETRI_PLACES=470, PETRI_TRANSITIONS=690} [2024-06-20 16:07:10,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 16:07:10,201 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 690 transitions, 9633 flow [2024-06-20 16:07:10,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:10,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:10,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:10,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:07:10,201 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:10,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash 521542058, now seen corresponding path program 15 times [2024-06-20 16:07:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:10,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019641200] [2024-06-20 16:07:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019641200] [2024-06-20 16:07:12,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019641200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:12,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:12,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590639899] [2024-06-20 16:07:12,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:12,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:12,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:12,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 690 transitions, 9633 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:12,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:12,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:13,892 INFO L124 PetriNetUnfolderBase]: 3212/5135 cut-off events. [2024-06-20 16:07:13,892 INFO L125 PetriNetUnfolderBase]: For 2021238/2021246 co-relation queries the response was YES. [2024-06-20 16:07:13,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77753 conditions, 5135 events. 3212/5135 cut-off events. For 2021238/2021246 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31030 event pairs, 511 based on Foata normal form. 9/5143 useless extension candidates. Maximal degree in co-relation 77531. Up to 4517 conditions per place. [2024-06-20 16:07:13,990 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 545 selfloop transitions, 163 changer transitions 0/713 dead transitions. [2024-06-20 16:07:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 713 transitions, 12390 flow [2024-06-20 16:07:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:07:13,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:07:13,991 INFO L175 Difference]: Start difference. First operand has 470 places, 690 transitions, 9633 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:07:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 713 transitions, 12390 flow [2024-06-20 16:07:20,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 713 transitions, 12001 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:20,345 INFO L231 Difference]: Finished difference. Result has 473 places, 699 transitions, 10275 flow [2024-06-20 16:07:20,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9244, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10275, PETRI_PLACES=473, PETRI_TRANSITIONS=699} [2024-06-20 16:07:20,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 16:07:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 699 transitions, 10275 flow [2024-06-20 16:07:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:07:20,346 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1675716064, now seen corresponding path program 16 times [2024-06-20 16:07:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:20,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109612473] [2024-06-20 16:07:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:21,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109612473] [2024-06-20 16:07:21,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109612473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:21,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:21,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:21,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631040422] [2024-06-20 16:07:21,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:21,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:21,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:21,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:21,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 699 transitions, 10275 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:21,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:21,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:21,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:23,672 INFO L124 PetriNetUnfolderBase]: 3209/5131 cut-off events. [2024-06-20 16:07:23,672 INFO L125 PetriNetUnfolderBase]: For 2019091/2019099 co-relation queries the response was YES. [2024-06-20 16:07:23,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77224 conditions, 5131 events. 3209/5131 cut-off events. For 2019091/2019099 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 30963 event pairs, 512 based on Foata normal form. 9/5139 useless extension candidates. Maximal degree in co-relation 77001. Up to 4662 conditions per place. [2024-06-20 16:07:23,761 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 638 selfloop transitions, 71 changer transitions 0/714 dead transitions. [2024-06-20 16:07:23,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 714 transitions, 11812 flow [2024-06-20 16:07:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:07:23,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:07:23,762 INFO L175 Difference]: Start difference. First operand has 473 places, 699 transitions, 10275 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:07:23,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 714 transitions, 11812 flow [2024-06-20 16:07:31,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 714 transitions, 11328 flow, removed 134 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:31,620 INFO L231 Difference]: Finished difference. Result has 476 places, 700 transitions, 10010 flow [2024-06-20 16:07:31,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9792, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10010, PETRI_PLACES=476, PETRI_TRANSITIONS=700} [2024-06-20 16:07:31,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 16:07:31,621 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 700 transitions, 10010 flow [2024-06-20 16:07:31,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:31,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:31,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:07:31,621 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:31,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1531825720, now seen corresponding path program 20 times [2024-06-20 16:07:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639825831] [2024-06-20 16:07:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639825831] [2024-06-20 16:07:32,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639825831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:32,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:32,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838242408] [2024-06-20 16:07:32,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:32,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:32,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 700 transitions, 10010 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:32,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:32,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:32,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:34,588 INFO L124 PetriNetUnfolderBase]: 3219/5149 cut-off events. [2024-06-20 16:07:34,588 INFO L125 PetriNetUnfolderBase]: For 2054370/2054372 co-relation queries the response was YES. [2024-06-20 16:07:34,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77402 conditions, 5149 events. 3219/5149 cut-off events. For 2054370/2054372 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 31096 event pairs, 542 based on Foata normal form. 4/5152 useless extension candidates. Maximal degree in co-relation 77178. Up to 4450 conditions per place. [2024-06-20 16:07:34,690 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 582 selfloop transitions, 133 changer transitions 0/720 dead transitions. [2024-06-20 16:07:34,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 720 transitions, 12040 flow [2024-06-20 16:07:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:07:34,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:07:34,691 INFO L175 Difference]: Start difference. First operand has 476 places, 700 transitions, 10010 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:07:34,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 720 transitions, 12040 flow [2024-06-20 16:07:42,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 720 transitions, 11666 flow, removed 118 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:42,596 INFO L231 Difference]: Finished difference. Result has 478 places, 704 transitions, 10263 flow [2024-06-20 16:07:42,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9636, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10263, PETRI_PLACES=478, PETRI_TRANSITIONS=704} [2024-06-20 16:07:42,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-20 16:07:42,597 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 704 transitions, 10263 flow [2024-06-20 16:07:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:42,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:42,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:42,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:07:42,597 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:42,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1180829401, now seen corresponding path program 12 times [2024-06-20 16:07:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:42,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045068994] [2024-06-20 16:07:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045068994] [2024-06-20 16:07:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045068994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:43,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014067217] [2024-06-20 16:07:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:43,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 704 transitions, 10263 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:43,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:43,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:43,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:45,380 INFO L124 PetriNetUnfolderBase]: 3247/5190 cut-off events. [2024-06-20 16:07:45,380 INFO L125 PetriNetUnfolderBase]: For 2128724/2128732 co-relation queries the response was YES. [2024-06-20 16:07:45,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79069 conditions, 5190 events. 3247/5190 cut-off events. For 2128724/2128732 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 31393 event pairs, 549 based on Foata normal form. 12/5201 useless extension candidates. Maximal degree in co-relation 78844. Up to 4590 conditions per place. [2024-06-20 16:07:45,491 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 613 selfloop transitions, 111 changer transitions 0/729 dead transitions. [2024-06-20 16:07:45,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 729 transitions, 12581 flow [2024-06-20 16:07:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:07:45,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:07:45,492 INFO L175 Difference]: Start difference. First operand has 478 places, 704 transitions, 10263 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:07:45,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 729 transitions, 12581 flow [2024-06-20 16:07:53,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 729 transitions, 11982 flow, removed 169 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:53,100 INFO L231 Difference]: Finished difference. Result has 481 places, 712 transitions, 10404 flow [2024-06-20 16:07:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10404, PETRI_PLACES=481, PETRI_TRANSITIONS=712} [2024-06-20 16:07:53,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 16:07:53,101 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 712 transitions, 10404 flow [2024-06-20 16:07:53,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:53,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:07:53,102 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1424936293, now seen corresponding path program 13 times [2024-06-20 16:07:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361056319] [2024-06-20 16:07:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:54,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361056319] [2024-06-20 16:07:54,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361056319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:54,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:54,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359728203] [2024-06-20 16:07:54,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:54,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:54,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:54,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:54,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 712 transitions, 10404 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:54,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:54,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:54,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:56,150 INFO L124 PetriNetUnfolderBase]: 3299/5252 cut-off events. [2024-06-20 16:07:56,150 INFO L125 PetriNetUnfolderBase]: For 2177028/2177030 co-relation queries the response was YES. [2024-06-20 16:07:56,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80819 conditions, 5252 events. 3299/5252 cut-off events. For 2177028/2177030 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 31620 event pairs, 530 based on Foata normal form. 4/5255 useless extension candidates. Maximal degree in co-relation 80592. Up to 4779 conditions per place. [2024-06-20 16:07:56,254 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 656 selfloop transitions, 85 changer transitions 0/746 dead transitions. [2024-06-20 16:07:56,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 746 transitions, 13084 flow [2024-06-20 16:07:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:07:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:07:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-20 16:07:56,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-20 16:07:56,255 INFO L175 Difference]: Start difference. First operand has 481 places, 712 transitions, 10404 flow. Second operand 11 states and 190 transitions. [2024-06-20 16:07:56,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 746 transitions, 13084 flow [2024-06-20 16:08:04,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 746 transitions, 12674 flow, removed 118 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:04,215 INFO L231 Difference]: Finished difference. Result has 487 places, 726 transitions, 10655 flow [2024-06-20 16:08:04,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9994, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10655, PETRI_PLACES=487, PETRI_TRANSITIONS=726} [2024-06-20 16:08:04,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 16:08:04,217 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 726 transitions, 10655 flow [2024-06-20 16:08:04,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:04,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:04,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:08:04,217 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 833813750, now seen corresponding path program 21 times [2024-06-20 16:08:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:04,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756616824] [2024-06-20 16:08:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:05,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:05,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756616824] [2024-06-20 16:08:05,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756616824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:05,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:05,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:05,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82444756] [2024-06-20 16:08:05,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:05,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:05,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:05,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:05,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 726 transitions, 10655 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:05,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:07,540 INFO L124 PetriNetUnfolderBase]: 3325/5290 cut-off events. [2024-06-20 16:08:07,540 INFO L125 PetriNetUnfolderBase]: For 2213128/2213128 co-relation queries the response was YES. [2024-06-20 16:08:07,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81661 conditions, 5290 events. 3325/5290 cut-off events. For 2213128/2213128 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31849 event pairs, 510 based on Foata normal form. 1/5290 useless extension candidates. Maximal degree in co-relation 81432. Up to 4858 conditions per place. [2024-06-20 16:08:07,636 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 687 selfloop transitions, 58 changer transitions 0/750 dead transitions. [2024-06-20 16:08:07,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 750 transitions, 13156 flow [2024-06-20 16:08:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:08:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:08:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 16:08:07,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-20 16:08:07,637 INFO L175 Difference]: Start difference. First operand has 487 places, 726 transitions, 10655 flow. Second operand 10 states and 168 transitions. [2024-06-20 16:08:07,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 750 transitions, 13156 flow [2024-06-20 16:08:15,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 750 transitions, 12871 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:15,434 INFO L231 Difference]: Finished difference. Result has 493 places, 736 transitions, 11112 flow [2024-06-20 16:08:15,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10370, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11112, PETRI_PLACES=493, PETRI_TRANSITIONS=736} [2024-06-20 16:08:15,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 16:08:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 736 transitions, 11112 flow [2024-06-20 16:08:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:15,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:15,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:15,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:08:15,435 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:15,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 833576600, now seen corresponding path program 22 times [2024-06-20 16:08:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991139292] [2024-06-20 16:08:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:15,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:16,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991139292] [2024-06-20 16:08:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991139292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:16,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:16,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629259018] [2024-06-20 16:08:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:16,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 736 transitions, 11112 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:18,578 INFO L124 PetriNetUnfolderBase]: 3319/5286 cut-off events. [2024-06-20 16:08:18,578 INFO L125 PetriNetUnfolderBase]: For 2241102/2241102 co-relation queries the response was YES. [2024-06-20 16:08:18,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81553 conditions, 5286 events. 3319/5286 cut-off events. For 2241102/2241102 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31945 event pairs, 511 based on Foata normal form. 2/5287 useless extension candidates. Maximal degree in co-relation 81322. Up to 4858 conditions per place. [2024-06-20 16:08:18,685 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 691 selfloop transitions, 52 changer transitions 0/748 dead transitions. [2024-06-20 16:08:18,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 748 transitions, 12702 flow [2024-06-20 16:08:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:08:18,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:08:18,686 INFO L175 Difference]: Start difference. First operand has 493 places, 736 transitions, 11112 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:08:18,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 748 transitions, 12702 flow [2024-06-20 16:08:27,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 748 transitions, 12085 flow, removed 278 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:27,328 INFO L231 Difference]: Finished difference. Result has 496 places, 736 transitions, 10606 flow [2024-06-20 16:08:27,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10495, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10606, PETRI_PLACES=496, PETRI_TRANSITIONS=736} [2024-06-20 16:08:27,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 16:08:27,328 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 736 transitions, 10606 flow [2024-06-20 16:08:27,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:27,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:27,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:08:27,329 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:27,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1840371013, now seen corresponding path program 14 times [2024-06-20 16:08:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:27,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424951622] [2024-06-20 16:08:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424951622] [2024-06-20 16:08:28,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424951622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:28,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:28,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570742631] [2024-06-20 16:08:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:28,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:28,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:28,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:28,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 736 transitions, 10606 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:28,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:28,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:28,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:30,449 INFO L124 PetriNetUnfolderBase]: 3316/5284 cut-off events. [2024-06-20 16:08:30,449 INFO L125 PetriNetUnfolderBase]: For 2218224/2218226 co-relation queries the response was YES. [2024-06-20 16:08:30,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80908 conditions, 5284 events. 3316/5284 cut-off events. For 2218224/2218226 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 31944 event pairs, 534 based on Foata normal form. 3/5286 useless extension candidates. Maximal degree in co-relation 80675. Up to 4871 conditions per place. [2024-06-20 16:08:30,554 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 690 selfloop transitions, 65 changer transitions 0/760 dead transitions. [2024-06-20 16:08:30,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 760 transitions, 12791 flow [2024-06-20 16:08:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:08:30,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:08:30,555 INFO L175 Difference]: Start difference. First operand has 496 places, 736 transitions, 10606 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:08:30,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 760 transitions, 12791 flow [2024-06-20 16:08:38,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 760 transitions, 12686 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:38,268 INFO L231 Difference]: Finished difference. Result has 499 places, 748 transitions, 11007 flow [2024-06-20 16:08:38,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10501, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11007, PETRI_PLACES=499, PETRI_TRANSITIONS=748} [2024-06-20 16:08:38,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-20 16:08:38,269 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 748 transitions, 11007 flow [2024-06-20 16:08:38,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:38,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:38,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:38,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:08:38,269 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:38,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:38,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1589138550, now seen corresponding path program 23 times [2024-06-20 16:08:38,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:38,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617461245] [2024-06-20 16:08:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:39,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617461245] [2024-06-20 16:08:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617461245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:39,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:39,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900757213] [2024-06-20 16:08:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:39,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 748 transitions, 11007 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:39,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:39,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:39,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:41,500 INFO L124 PetriNetUnfolderBase]: 3337/5323 cut-off events. [2024-06-20 16:08:41,500 INFO L125 PetriNetUnfolderBase]: For 2286441/2286443 co-relation queries the response was YES. [2024-06-20 16:08:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82612 conditions, 5323 events. 3337/5323 cut-off events. For 2286441/2286443 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 32305 event pairs, 545 based on Foata normal form. 3/5325 useless extension candidates. Maximal degree in co-relation 82377. Up to 4357 conditions per place. [2024-06-20 16:08:41,608 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 283 changer transitions 0/772 dead transitions. [2024-06-20 16:08:41,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 772 transitions, 14101 flow [2024-06-20 16:08:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:08:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:08:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 16:08:41,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-20 16:08:41,609 INFO L175 Difference]: Start difference. First operand has 499 places, 748 transitions, 11007 flow. Second operand 10 states and 174 transitions. [2024-06-20 16:08:41,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 772 transitions, 14101 flow [2024-06-20 16:08:51,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 772 transitions, 13938 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:51,262 INFO L231 Difference]: Finished difference. Result has 506 places, 759 transitions, 12485 flow [2024-06-20 16:08:51,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10844, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12485, PETRI_PLACES=506, PETRI_TRANSITIONS=759} [2024-06-20 16:08:51,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 16:08:51,263 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 759 transitions, 12485 flow [2024-06-20 16:08:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:51,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:51,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:51,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 16:08:51,263 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:51,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2046303664, now seen corresponding path program 24 times [2024-06-20 16:08:51,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257096095] [2024-06-20 16:08:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:51,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:52,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:52,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257096095] [2024-06-20 16:08:52,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257096095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:52,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:52,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:52,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359257348] [2024-06-20 16:08:52,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:52,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:52,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 759 transitions, 12485 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:52,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:52,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:52,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:54,708 INFO L124 PetriNetUnfolderBase]: 3347/5323 cut-off events. [2024-06-20 16:08:54,708 INFO L125 PetriNetUnfolderBase]: For 2352813/2352815 co-relation queries the response was YES. [2024-06-20 16:08:54,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84819 conditions, 5323 events. 3347/5323 cut-off events. For 2352813/2352815 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 32084 event pairs, 544 based on Foata normal form. 4/5326 useless extension candidates. Maximal degree in co-relation 84581. Up to 4546 conditions per place. [2024-06-20 16:08:54,900 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 175 changer transitions 0/777 dead transitions. [2024-06-20 16:08:54,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 777 transitions, 14841 flow [2024-06-20 16:08:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:08:54,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:08:54,901 INFO L175 Difference]: Start difference. First operand has 506 places, 759 transitions, 12485 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:08:54,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 777 transitions, 14841 flow [2024-06-20 16:09:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 777 transitions, 14200 flow, removed 278 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:03,632 INFO L231 Difference]: Finished difference. Result has 510 places, 763 transitions, 12649 flow [2024-06-20 16:09:03,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11944, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12649, PETRI_PLACES=510, PETRI_TRANSITIONS=763} [2024-06-20 16:09:03,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-20 16:09:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 763 transitions, 12649 flow [2024-06-20 16:09:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:03,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:03,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 16:09:03,633 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:03,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2046541000, now seen corresponding path program 17 times [2024-06-20 16:09:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619156900] [2024-06-20 16:09:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:04,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619156900] [2024-06-20 16:09:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619156900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070745698] [2024-06-20 16:09:04,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:04,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:05,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:05,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 763 transitions, 12649 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:05,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:05,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:07,379 INFO L124 PetriNetUnfolderBase]: 3352/5334 cut-off events. [2024-06-20 16:09:07,379 INFO L125 PetriNetUnfolderBase]: For 2332126/2332134 co-relation queries the response was YES. [2024-06-20 16:09:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83949 conditions, 5334 events. 3352/5334 cut-off events. For 2332126/2332134 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32157 event pairs, 514 based on Foata normal form. 9/5342 useless extension candidates. Maximal degree in co-relation 83710. Up to 4813 conditions per place. [2024-06-20 16:09:07,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 672 selfloop transitions, 103 changer transitions 0/780 dead transitions. [2024-06-20 16:09:07,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 780 transitions, 14792 flow [2024-06-20 16:09:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:09:07,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:09:07,496 INFO L175 Difference]: Start difference. First operand has 510 places, 763 transitions, 12649 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:09:07,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 780 transitions, 14792 flow [2024-06-20 16:09:17,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 780 transitions, 13956 flow, removed 177 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:17,947 INFO L231 Difference]: Finished difference. Result has 511 places, 766 transitions, 12252 flow [2024-06-20 16:09:17,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11813, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12252, PETRI_PLACES=511, PETRI_TRANSITIONS=766} [2024-06-20 16:09:17,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-20 16:09:17,948 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 766 transitions, 12252 flow [2024-06-20 16:09:17,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:17,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:17,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 16:09:17,949 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:17,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1412274343, now seen corresponding path program 15 times [2024-06-20 16:09:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:17,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159028213] [2024-06-20 16:09:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:19,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159028213] [2024-06-20 16:09:19,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159028213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:19,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:19,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893303425] [2024-06-20 16:09:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:19,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:19,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 766 transitions, 12252 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:19,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:19,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:19,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:21,546 INFO L124 PetriNetUnfolderBase]: 3346/5338 cut-off events. [2024-06-20 16:09:21,546 INFO L125 PetriNetUnfolderBase]: For 2317086/2317094 co-relation queries the response was YES. [2024-06-20 16:09:21,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82514 conditions, 5338 events. 3346/5338 cut-off events. For 2317086/2317094 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 32371 event pairs, 510 based on Foata normal form. 10/5347 useless extension candidates. Maximal degree in co-relation 82275. Up to 4465 conditions per place. [2024-06-20 16:09:21,662 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 234 changer transitions 0/786 dead transitions. [2024-06-20 16:09:21,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 786 transitions, 14914 flow [2024-06-20 16:09:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:09:21,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:09:21,663 INFO L175 Difference]: Start difference. First operand has 511 places, 766 transitions, 12252 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:09:21,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 786 transitions, 14914 flow [2024-06-20 16:09:31,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 786 transitions, 14397 flow, removed 122 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:31,537 INFO L231 Difference]: Finished difference. Result has 513 places, 766 transitions, 12209 flow [2024-06-20 16:09:31,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11735, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12209, PETRI_PLACES=513, PETRI_TRANSITIONS=766} [2024-06-20 16:09:31,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-20 16:09:31,537 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 766 transitions, 12209 flow [2024-06-20 16:09:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:31,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:31,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 16:09:31,538 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:31,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1180829618, now seen corresponding path program 18 times [2024-06-20 16:09:31,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:31,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037060021] [2024-06-20 16:09:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:31,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:32,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:32,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037060021] [2024-06-20 16:09:32,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037060021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:32,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:32,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875189591] [2024-06-20 16:09:32,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:33,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 766 transitions, 12209 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:33,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:33,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:33,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:35,249 INFO L124 PetriNetUnfolderBase]: 3343/5332 cut-off events. [2024-06-20 16:09:35,249 INFO L125 PetriNetUnfolderBase]: For 2311918/2311926 co-relation queries the response was YES. [2024-06-20 16:09:35,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82549 conditions, 5332 events. 3343/5332 cut-off events. For 2311918/2311926 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 32275 event pairs, 515 based on Foata normal form. 9/5340 useless extension candidates. Maximal degree in co-relation 82309. Up to 4802 conditions per place. [2024-06-20 16:09:35,514 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 675 selfloop transitions, 99 changer transitions 0/779 dead transitions. [2024-06-20 16:09:35,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 779 transitions, 13799 flow [2024-06-20 16:09:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:09:35,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:09:35,516 INFO L175 Difference]: Start difference. First operand has 513 places, 766 transitions, 12209 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:09:35,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 779 transitions, 13799 flow [2024-06-20 16:09:46,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 779 transitions, 13019 flow, removed 187 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:46,107 INFO L231 Difference]: Finished difference. Result has 514 places, 766 transitions, 11633 flow [2024-06-20 16:09:46,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11429, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11633, PETRI_PLACES=514, PETRI_TRANSITIONS=766} [2024-06-20 16:09:46,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-20 16:09:46,108 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 766 transitions, 11633 flow [2024-06-20 16:09:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:46,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:46,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:46,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 16:09:46,109 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:46,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1912759621, now seen corresponding path program 16 times [2024-06-20 16:09:46,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286526484] [2024-06-20 16:09:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:47,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286526484] [2024-06-20 16:09:47,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286526484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:47,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:47,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:47,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667855479] [2024-06-20 16:09:47,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:47,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:47,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:47,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:47,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 766 transitions, 11633 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:47,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:47,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:47,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:49,289 INFO L124 PetriNetUnfolderBase]: 3353/5338 cut-off events. [2024-06-20 16:09:49,290 INFO L125 PetriNetUnfolderBase]: For 2336603/2336611 co-relation queries the response was YES. [2024-06-20 16:09:49,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81713 conditions, 5338 events. 3353/5338 cut-off events. For 2336603/2336611 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 32181 event pairs, 511 based on Foata normal form. 10/5347 useless extension candidates. Maximal degree in co-relation 81474. Up to 4783 conditions per place. [2024-06-20 16:09:49,391 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 679 selfloop transitions, 103 changer transitions 0/787 dead transitions. [2024-06-20 16:09:49,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 787 transitions, 13801 flow [2024-06-20 16:09:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:09:49,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:09:49,392 INFO L175 Difference]: Start difference. First operand has 514 places, 766 transitions, 11633 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:09:49,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 787 transitions, 13801 flow [2024-06-20 16:09:59,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 787 transitions, 13640 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:59,047 INFO L231 Difference]: Finished difference. Result has 518 places, 770 transitions, 11886 flow [2024-06-20 16:09:59,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11472, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11886, PETRI_PLACES=518, PETRI_TRANSITIONS=770} [2024-06-20 16:09:59,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-20 16:09:59,047 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 770 transitions, 11886 flow [2024-06-20 16:09:59,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:59,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:59,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:59,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 16:09:59,048 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:59,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -970417796, now seen corresponding path program 25 times [2024-06-20 16:09:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816281977] [2024-06-20 16:09:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:00,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816281977] [2024-06-20 16:10:00,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816281977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:00,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373727248] [2024-06-20 16:10:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:00,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:00,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 770 transitions, 11886 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:00,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:00,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:00,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:02,384 INFO L124 PetriNetUnfolderBase]: 3363/5356 cut-off events. [2024-06-20 16:10:02,385 INFO L125 PetriNetUnfolderBase]: For 2369506/2369508 co-relation queries the response was YES. [2024-06-20 16:10:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82540 conditions, 5356 events. 3363/5356 cut-off events. For 2369506/2369508 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 32405 event pairs, 543 based on Foata normal form. 4/5359 useless extension candidates. Maximal degree in co-relation 82299. Up to 4663 conditions per place. [2024-06-20 16:10:02,486 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 661 selfloop transitions, 124 changer transitions 0/790 dead transitions. [2024-06-20 16:10:02,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 790 transitions, 13850 flow [2024-06-20 16:10:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:10:02,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:10:02,488 INFO L175 Difference]: Start difference. First operand has 518 places, 770 transitions, 11886 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:10:02,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 790 transitions, 13850 flow [2024-06-20 16:10:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 790 transitions, 13095 flow, removed 103 selfloop flow, removed 11 redundant places. [2024-06-20 16:10:13,676 INFO L231 Difference]: Finished difference. Result has 516 places, 774 transitions, 11726 flow [2024-06-20 16:10:13,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11131, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11726, PETRI_PLACES=516, PETRI_TRANSITIONS=774} [2024-06-20 16:10:13,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-20 16:10:13,676 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 774 transitions, 11726 flow [2024-06-20 16:10:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:13,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:13,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 16:10:13,677 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:13,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 844658480, now seen corresponding path program 26 times [2024-06-20 16:10:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148999334] [2024-06-20 16:10:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148999334] [2024-06-20 16:10:14,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148999334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:14,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:14,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669887607] [2024-06-20 16:10:14,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:15,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:15,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 774 transitions, 11726 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:15,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:15,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:15,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:17,115 INFO L124 PetriNetUnfolderBase]: 3376/5378 cut-off events. [2024-06-20 16:10:17,115 INFO L125 PetriNetUnfolderBase]: For 2385100/2385102 co-relation queries the response was YES. [2024-06-20 16:10:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82573 conditions, 5378 events. 3376/5378 cut-off events. For 2385100/2385102 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 32613 event pairs, 543 based on Foata normal form. 3/5380 useless extension candidates. Maximal degree in co-relation 82334. Up to 4603 conditions per place. [2024-06-20 16:10:17,217 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 616 selfloop transitions, 174 changer transitions 0/795 dead transitions. [2024-06-20 16:10:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 795 transitions, 14416 flow [2024-06-20 16:10:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:10:17,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:10:17,219 INFO L175 Difference]: Start difference. First operand has 516 places, 774 transitions, 11726 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:10:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 795 transitions, 14416 flow [2024-06-20 16:10:27,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 795 transitions, 13665 flow, removed 178 selfloop flow, removed 9 redundant places. [2024-06-20 16:10:27,568 INFO L231 Difference]: Finished difference. Result has 516 places, 780 transitions, 11735 flow [2024-06-20 16:10:27,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10983, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11735, PETRI_PLACES=516, PETRI_TRANSITIONS=780} [2024-06-20 16:10:27,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-20 16:10:27,568 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 780 transitions, 11735 flow [2024-06-20 16:10:27,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:27,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:27,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 16:10:27,569 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:27,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash 755506850, now seen corresponding path program 27 times [2024-06-20 16:10:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758758548] [2024-06-20 16:10:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:28,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758758548] [2024-06-20 16:10:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758758548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:28,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:28,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235567867] [2024-06-20 16:10:28,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:28,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:28,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 780 transitions, 11735 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:28,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:28,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:28,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:30,922 INFO L124 PetriNetUnfolderBase]: 3370/5372 cut-off events. [2024-06-20 16:10:30,922 INFO L125 PetriNetUnfolderBase]: For 2350436/2350438 co-relation queries the response was YES. [2024-06-20 16:10:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80445 conditions, 5372 events. 3370/5372 cut-off events. For 2350436/2350438 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 32616 event pairs, 545 based on Foata normal form. 4/5375 useless extension candidates. Maximal degree in co-relation 80207. Up to 4655 conditions per place. [2024-06-20 16:10:31,023 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 655 selfloop transitions, 135 changer transitions 0/795 dead transitions. [2024-06-20 16:10:31,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 795 transitions, 13371 flow [2024-06-20 16:10:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:10:31,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:10:31,024 INFO L175 Difference]: Start difference. First operand has 516 places, 780 transitions, 11735 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:10:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 795 transitions, 13371 flow [2024-06-20 16:10:42,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 795 transitions, 12767 flow, removed 231 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:42,262 INFO L231 Difference]: Finished difference. Result has 521 places, 780 transitions, 11408 flow [2024-06-20 16:10:42,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11131, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11408, PETRI_PLACES=521, PETRI_TRANSITIONS=780} [2024-06-20 16:10:42,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-20 16:10:42,263 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 780 transitions, 11408 flow [2024-06-20 16:10:42,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:42,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:42,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 16:10:42,264 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:42,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 844538510, now seen corresponding path program 28 times [2024-06-20 16:10:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388373537] [2024-06-20 16:10:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:43,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:43,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388373537] [2024-06-20 16:10:43,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388373537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:43,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144982527] [2024-06-20 16:10:43,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:43,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:43,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:43,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:43,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 780 transitions, 11408 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:43,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:43,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:43,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:45,681 INFO L124 PetriNetUnfolderBase]: 3367/5358 cut-off events. [2024-06-20 16:10:45,681 INFO L125 PetriNetUnfolderBase]: For 2332460/2332460 co-relation queries the response was YES. [2024-06-20 16:10:45,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80105 conditions, 5358 events. 3367/5358 cut-off events. For 2332460/2332460 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 32334 event pairs, 541 based on Foata normal form. 1/5358 useless extension candidates. Maximal degree in co-relation 79865. Up to 4926 conditions per place. [2024-06-20 16:10:45,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 730 selfloop transitions, 56 changer transitions 0/791 dead transitions. [2024-06-20 16:10:45,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 791 transitions, 13008 flow [2024-06-20 16:10:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:10:45,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:10:45,783 INFO L175 Difference]: Start difference. First operand has 521 places, 780 transitions, 11408 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:10:45,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 791 transitions, 13008 flow [2024-06-20 16:10:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 791 transitions, 12415 flow, removed 105 selfloop flow, removed 9 redundant places. [2024-06-20 16:10:55,353 INFO L231 Difference]: Finished difference. Result has 521 places, 780 transitions, 10933 flow [2024-06-20 16:10:55,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10933, PETRI_PLACES=521, PETRI_TRANSITIONS=780} [2024-06-20 16:10:55,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-20 16:10:55,354 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 780 transitions, 10933 flow [2024-06-20 16:10:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:55,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:55,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:55,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 16:10:55,355 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:55,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash 844658666, now seen corresponding path program 19 times [2024-06-20 16:10:55,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:55,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520101321] [2024-06-20 16:10:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:55,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:56,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:56,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520101321] [2024-06-20 16:10:56,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520101321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:56,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:56,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174005966] [2024-06-20 16:10:56,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:57,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:57,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 780 transitions, 10933 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:57,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:57,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:57,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:59,034 INFO L124 PetriNetUnfolderBase]: 3364/5360 cut-off events. [2024-06-20 16:10:59,034 INFO L125 PetriNetUnfolderBase]: For 2337052/2337060 co-relation queries the response was YES. [2024-06-20 16:10:59,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79404 conditions, 5360 events. 3364/5360 cut-off events. For 2337052/2337060 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 32478 event pairs, 513 based on Foata normal form. 9/5368 useless extension candidates. Maximal degree in co-relation 79163. Up to 4852 conditions per place. [2024-06-20 16:10:59,131 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 699 selfloop transitions, 90 changer transitions 0/794 dead transitions. [2024-06-20 16:10:59,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 794 transitions, 12611 flow [2024-06-20 16:10:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:10:59,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:10:59,132 INFO L175 Difference]: Start difference. First operand has 521 places, 780 transitions, 10933 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:10:59,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 794 transitions, 12611 flow