./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.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/safe011_power.opt_pso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe011_power.opt_pso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe011_power.opt_pso.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-bcb38a6-m [2024-06-04 15:35:19,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:35:20,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:35:20,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:35:20,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:35:20,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:35:20,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:35:20,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:35:20,070 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:35:20,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:35:20,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:35:20,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:35:20,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:35:20,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:35:20,071 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:35:20,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:35:20,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:35:20,072 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:35:20,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:35:20,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:35:20,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:35:20,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:35:20,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:35:20,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:35:20,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:35:20,075 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:35:20,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:35:20,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:35:20,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:35:20,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:35:20,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:35:20,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:35:20,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:35:20,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:35:20,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:35:20,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:35:20,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:35:20,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:35:20,078 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:35:20,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:35:20,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:35:20,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:35:20,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:35:20,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:35:20,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:35:20,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:35:20,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:35:20,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:35:20,283 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:35:20,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-04 15:35:21,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:35:21,658 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:35:21,661 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-04 15:35:21,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c688f9746/ff3a29479e29443c98ee4c3613b50b6f/FLAG68a49f7b0 [2024-06-04 15:35:21,692 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c688f9746/ff3a29479e29443c98ee4c3613b50b6f [2024-06-04 15:35:21,694 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:35:21,695 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:35:21,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe011_power.opt_pso.opt.yml/witness.yml [2024-06-04 15:35:21,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:35:21,831 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:35:21,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:35:21,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:35:21,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:35:21,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:35:21" (1/2) ... [2024-06-04 15:35:21,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a80c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:21, skipping insertion in model container [2024-06-04 15:35:21,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:35:21" (1/2) ... [2024-06-04 15:35:21,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fc60f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:35:21, skipping insertion in model container [2024-06-04 15:35:21,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:21" (2/2) ... [2024-06-04 15:35:21,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a80c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:21, skipping insertion in model container [2024-06-04 15:35:21,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:21" (2/2) ... [2024-06-04 15:35:21,842 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:35:21,925 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:35:21,926 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-04 15:35:21,926 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-04 15:35:21,927 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-04 15:35:21,927 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:35:21,927 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-04 15:35:21,949 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:35:22,231 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:35:22,246 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:35:22,383 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:35:22,432 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:35:22,433 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22 WrapperNode [2024-06-04 15:35:22,433 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:35:22,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:35:22,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:35:22,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:35:22,439 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 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,475 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 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,501 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-04 15:35:22,502 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:35:22,503 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:35:22,503 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:35:22,503 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:35:22,511 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,514 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,525 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]. [2024-06-04 15:35:22,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:35:22,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:35:22,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:35:22,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:35:22,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (1/1) ... [2024-06-04 15:35:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:35:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:35:22,590 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) [2024-06-04 15:35:22,624 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 [2024-06-04 15:35:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:35:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:35:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:35:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:35:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:35:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:35:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:35:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:35:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:35:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:35:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:35:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:35:22,641 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:35:22,779 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:35:22,781 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:35:23,067 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:35:23,068 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:35:23,218 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:35:23,218 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:35:23,219 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:35:23 BoogieIcfgContainer [2024-06-04 15:35:23,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:35:23,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:35:23,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:35:23,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:35:23,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:35:21" (1/4) ... [2024-06-04 15:35:23,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25076d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:35:23, skipping insertion in model container [2024-06-04 15:35:23,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:35:21" (2/4) ... [2024-06-04 15:35:23,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25076d6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:35:23, skipping insertion in model container [2024-06-04 15:35:23,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:35:22" (3/4) ... [2024-06-04 15:35:23,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25076d6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:35:23, skipping insertion in model container [2024-06-04 15:35:23,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:35:23" (4/4) ... [2024-06-04 15:35:23,225 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_power.opt_pso.opt.i [2024-06-04 15:35:23,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:35:23,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:35:23,238 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:35:23,271 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:35:23,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:35:23,312 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 15:35:23,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:35:23,315 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 63 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. [2024-06-04 15:35:23,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 15:35:23,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 15:35:23,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:35:23,335 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;@75f10b93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:35:23,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:35:23,341 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:35:23,341 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:35:23,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:35:23,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:23,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:35:23,342 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)] === [2024-06-04 15:35:23,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-04 15:35:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:23,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757560093] [2024-06-04 15:35:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:24,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757560093] [2024-06-04 15:35:24,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757560093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:24,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:24,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:35:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177300730] [2024-06-04 15:35:24,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:24,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:35:24,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:35:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:35:24,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:24,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:24,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:24,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:24,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:24,769 INFO L124 PetriNetUnfolderBase]: 1407/2119 cut-off events. [2024-06-04 15:35:24,769 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 15:35:24,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4325 conditions, 2119 events. 1407/2119 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9669 event pairs, 989 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 4310. Up to 2105 conditions per place. [2024-06-04 15:35:24,783 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 15:35:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 175 flow [2024-06-04 15:35:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:35:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:35:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-04 15:35:24,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 15:35:24,795 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 68 transitions. [2024-06-04 15:35:24,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 175 flow [2024-06-04 15:35:24,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:24,800 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 15:35:24,801 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} [2024-06-04 15:35:24,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 15:35:24,804 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 15:35:24,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:24,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:24,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:24,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:35:24,805 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)] === [2024-06-04 15:35:24,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash 588573823, now seen corresponding path program 1 times [2024-06-04 15:35:24,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:24,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048191167] [2024-06-04 15:35:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:25,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:25,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048191167] [2024-06-04 15:35:25,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048191167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:25,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:35:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22964068] [2024-06-04 15:35:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:35:25,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:35:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:35:25,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:25,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:25,709 INFO L124 PetriNetUnfolderBase]: 1415/2130 cut-off events. [2024-06-04 15:35:25,710 INFO L125 PetriNetUnfolderBase]: For 400/408 co-relation queries the response was YES. [2024-06-04 15:35:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4915 conditions, 2130 events. 1415/2130 cut-off events. For 400/408 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9623 event pairs, 866 based on Foata normal form. 8/2135 useless extension candidates. Maximal degree in co-relation 4900. Up to 2072 conditions per place. [2024-06-04 15:35:25,719 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 45 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-04 15:35:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 280 flow [2024-06-04 15:35:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:35:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:35:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-04 15:35:25,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 15:35:25,721 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 93 transitions. [2024-06-04 15:35:25,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 280 flow [2024-06-04 15:35:25,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:25,723 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-04 15:35:25,723 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-04 15:35:25,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 15:35:25,724 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-04 15:35:25,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:25,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:25,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:35:25,725 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)] === [2024-06-04 15:35:25,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-04 15:35:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413496313] [2024-06-04 15:35:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:25,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:26,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:26,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413496313] [2024-06-04 15:35:26,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413496313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:26,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:26,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:35:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347146998] [2024-06-04 15:35:26,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:35:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:35:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:35:26,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:26,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:26,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:26,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:26,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:26,673 INFO L124 PetriNetUnfolderBase]: 1431/2152 cut-off events. [2024-06-04 15:35:26,674 INFO L125 PetriNetUnfolderBase]: For 1373/1390 co-relation queries the response was YES. [2024-06-04 15:35:26,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5809 conditions, 2152 events. 1431/2152 cut-off events. For 1373/1390 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9782 event pairs, 618 based on Foata normal form. 16/2165 useless extension candidates. Maximal degree in co-relation 5791. Up to 2012 conditions per place. [2024-06-04 15:35:26,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-04 15:35:26,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 418 flow [2024-06-04 15:35:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:35:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:35:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 15:35:26,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 15:35:26,685 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 117 transitions. [2024-06-04 15:35:26,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 418 flow [2024-06-04 15:35:26,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 414 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 15:35:26,688 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 251 flow [2024-06-04 15:35:26,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-04 15:35:26,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-04 15:35:26,689 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 251 flow [2024-06-04 15:35:26,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:26,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:26,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:26,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:35:26,690 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:26,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2146976690, now seen corresponding path program 1 times [2024-06-04 15:35:26,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:26,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077306384] [2024-06-04 15:35:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:26,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:27,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077306384] [2024-06-04 15:35:27,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077306384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:27,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:27,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:27,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413754903] [2024-06-04 15:35:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:27,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:27,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:27,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:27,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-04 15:35:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:27,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:27,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-04 15:35:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:28,044 INFO L124 PetriNetUnfolderBase]: 1482/2233 cut-off events. [2024-06-04 15:35:28,045 INFO L125 PetriNetUnfolderBase]: For 2719/2734 co-relation queries the response was YES. [2024-06-04 15:35:28,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6799 conditions, 2233 events. 1482/2233 cut-off events. For 2719/2734 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10266 event pairs, 484 based on Foata normal form. 24/2254 useless extension candidates. Maximal degree in co-relation 6778. Up to 1991 conditions per place. [2024-06-04 15:35:28,055 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-04 15:35:28,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 527 flow [2024-06-04 15:35:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 15:35:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 15:35:28,060 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 251 flow. Second operand 6 states and 137 transitions. [2024-06-04 15:35:28,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 527 flow [2024-06-04 15:35:28,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 511 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:28,065 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 293 flow [2024-06-04 15:35:28,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-04 15:35:28,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-04 15:35:28,067 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 293 flow [2024-06-04 15:35:28,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:28,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:28,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:35:28,068 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)] === [2024-06-04 15:35:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-04 15:35:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103646755] [2024-06-04 15:35:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:28,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103646755] [2024-06-04 15:35:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103646755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:35:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985009594] [2024-06-04 15:35:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:28,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:35:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:35:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:35:28,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:28,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:28,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:28,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:28,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:28,978 INFO L124 PetriNetUnfolderBase]: 1477/2226 cut-off events. [2024-06-04 15:35:28,978 INFO L125 PetriNetUnfolderBase]: For 3973/3988 co-relation queries the response was YES. [2024-06-04 15:35:28,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7279 conditions, 2226 events. 1477/2226 cut-off events. For 3973/3988 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10087 event pairs, 700 based on Foata normal form. 8/2231 useless extension candidates. Maximal degree in co-relation 7255. Up to 2203 conditions per place. [2024-06-04 15:35:28,991 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-04 15:35:28,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 474 flow [2024-06-04 15:35:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-04 15:35:28,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-04 15:35:28,993 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 293 flow. Second operand 6 states and 95 transitions. [2024-06-04 15:35:28,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 474 flow [2024-06-04 15:35:28,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 430 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:28,998 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 319 flow [2024-06-04 15:35:28,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-04 15:35:29,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 15:35:29,001 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 319 flow [2024-06-04 15:35:29,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:29,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:29,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:29,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:35:29,005 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)] === [2024-06-04 15:35:29,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-04 15:35:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:29,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180515146] [2024-06-04 15:35:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:29,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:29,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180515146] [2024-06-04 15:35:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180515146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:29,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:29,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:29,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034224116] [2024-06-04 15:35:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:29,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:29,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:29,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:29,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:29,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:30,131 INFO L124 PetriNetUnfolderBase]: 1704/2551 cut-off events. [2024-06-04 15:35:30,131 INFO L125 PetriNetUnfolderBase]: For 5472/5472 co-relation queries the response was YES. [2024-06-04 15:35:30,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2551 events. 1704/2551 cut-off events. For 5472/5472 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11697 event pairs, 828 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 8497. Up to 2520 conditions per place. [2024-06-04 15:35:30,147 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-04 15:35:30,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 560 flow [2024-06-04 15:35:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 15:35:30,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:35:30,149 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 319 flow. Second operand 6 states and 96 transitions. [2024-06-04 15:35:30,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 560 flow [2024-06-04 15:35:30,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 525 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:30,154 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 392 flow [2024-06-04 15:35:30,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-04 15:35:30,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 15:35:30,157 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 392 flow [2024-06-04 15:35:30,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:30,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:30,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:35:30,158 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)] === [2024-06-04 15:35:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 830700505, now seen corresponding path program 1 times [2024-06-04 15:35:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:30,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805961403] [2024-06-04 15:35:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:30,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:30,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805961403] [2024-06-04 15:35:30,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805961403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:30,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:30,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247331241] [2024-06-04 15:35:30,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:30,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:30,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:30,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:30,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:30,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:30,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:31,207 INFO L124 PetriNetUnfolderBase]: 1650/2482 cut-off events. [2024-06-04 15:35:31,208 INFO L125 PetriNetUnfolderBase]: For 7654/7703 co-relation queries the response was YES. [2024-06-04 15:35:31,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9095 conditions, 2482 events. 1650/2482 cut-off events. For 7654/7703 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11431 event pairs, 720 based on Foata normal form. 16/2487 useless extension candidates. Maximal degree in co-relation 9065. Up to 2412 conditions per place. [2024-06-04 15:35:31,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-04 15:35:31,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 696 flow [2024-06-04 15:35:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 15:35:31,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:35:31,230 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 392 flow. Second operand 6 states and 110 transitions. [2024-06-04 15:35:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 696 flow [2024-06-04 15:35:31,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 688 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-04 15:35:31,236 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 538 flow [2024-06-04 15:35:31,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-04 15:35:31,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-04 15:35:31,237 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 538 flow [2024-06-04 15:35:31,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:31,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:31,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:31,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:35:31,238 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)] === [2024-06-04 15:35:31,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash -807277655, now seen corresponding path program 2 times [2024-06-04 15:35:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931966567] [2024-06-04 15:35:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931966567] [2024-06-04 15:35:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931966567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:35:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571210965] [2024-06-04 15:35:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:31,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:35:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:35:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:35:31,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:31,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 538 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:31,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:31,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:31,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:32,379 INFO L124 PetriNetUnfolderBase]: 1704/2560 cut-off events. [2024-06-04 15:35:32,380 INFO L125 PetriNetUnfolderBase]: For 10263/10327 co-relation queries the response was YES. [2024-06-04 15:35:32,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 2560 events. 1704/2560 cut-off events. For 10263/10327 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11833 event pairs, 721 based on Foata normal form. 13/2562 useless extension candidates. Maximal degree in co-relation 10536. Up to 2428 conditions per place. [2024-06-04 15:35:32,394 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-04 15:35:32,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 878 flow [2024-06-04 15:35:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:35:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:35:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 15:35:32,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-04 15:35:32,398 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 538 flow. Second operand 6 states and 110 transitions. [2024-06-04 15:35:32,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 878 flow [2024-06-04 15:35:32,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 846 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:32,410 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 657 flow [2024-06-04 15:35:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=657, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-04 15:35:32,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 15:35:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 657 flow [2024-06-04 15:35:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:32,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:35:32,413 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)] === [2024-06-04 15:35:32,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2027764451, now seen corresponding path program 1 times [2024-06-04 15:35:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710611541] [2024-06-04 15:35:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:33,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:33,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710611541] [2024-06-04 15:35:33,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710611541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:33,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:33,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361519235] [2024-06-04 15:35:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:33,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:33,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:33,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:33,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 657 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:33,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:33,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:33,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:33,720 INFO L124 PetriNetUnfolderBase]: 1751/2618 cut-off events. [2024-06-04 15:35:33,720 INFO L125 PetriNetUnfolderBase]: For 12782/12782 co-relation queries the response was YES. [2024-06-04 15:35:33,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11277 conditions, 2618 events. 1751/2618 cut-off events. For 12782/12782 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11946 event pairs, 792 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 11239. Up to 2578 conditions per place. [2024-06-04 15:35:33,735 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-04 15:35:33,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 925 flow [2024-06-04 15:35:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 15:35:33,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-04 15:35:33,737 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 657 flow. Second operand 7 states and 110 transitions. [2024-06-04 15:35:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 925 flow [2024-06-04 15:35:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 880 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:33,749 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 674 flow [2024-06-04 15:35:33,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-04 15:35:33,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-04 15:35:33,750 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 674 flow [2024-06-04 15:35:33,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:33,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:33,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:35:33,751 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)] === [2024-06-04 15:35:33,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash -18206589, now seen corresponding path program 1 times [2024-06-04 15:35:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:33,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784392098] [2024-06-04 15:35:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784392098] [2024-06-04 15:35:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784392098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:34,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56550452] [2024-06-04 15:35:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:34,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:34,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 674 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:34,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:35,021 INFO L124 PetriNetUnfolderBase]: 1731/2602 cut-off events. [2024-06-04 15:35:35,021 INFO L125 PetriNetUnfolderBase]: For 17051/17088 co-relation queries the response was YES. [2024-06-04 15:35:35,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 2602 events. 1731/2602 cut-off events. For 17051/17088 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12168 event pairs, 572 based on Foata normal form. 27/2580 useless extension candidates. Maximal degree in co-relation 11940. Up to 2368 conditions per place. [2024-06-04 15:35:35,040 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 85 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-04 15:35:35,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1085 flow [2024-06-04 15:35:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 15:35:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-04 15:35:35,042 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 674 flow. Second operand 7 states and 137 transitions. [2024-06-04 15:35:35,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1085 flow [2024-06-04 15:35:35,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 1047 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:35,053 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 795 flow [2024-06-04 15:35:35,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-04 15:35:35,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-04 15:35:35,056 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 795 flow [2024-06-04 15:35:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:35,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:35,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:35,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:35:35,057 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)] === [2024-06-04 15:35:35,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash -18086433, now seen corresponding path program 1 times [2024-06-04 15:35:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:35,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642553782] [2024-06-04 15:35:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:35,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642553782] [2024-06-04 15:35:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642553782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091365952] [2024-06-04 15:35:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:35,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:35,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 795 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:35,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:35,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:35,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:36,333 INFO L124 PetriNetUnfolderBase]: 1829/2730 cut-off events. [2024-06-04 15:35:36,334 INFO L125 PetriNetUnfolderBase]: For 18220/18220 co-relation queries the response was YES. [2024-06-04 15:35:36,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13356 conditions, 2730 events. 1829/2730 cut-off events. For 18220/18220 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12442 event pairs, 617 based on Foata normal form. 2/2730 useless extension candidates. Maximal degree in co-relation 13314. Up to 2684 conditions per place. [2024-06-04 15:35:36,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2024-06-04 15:35:36,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1168 flow [2024-06-04 15:35:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:35:36,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-04 15:35:36,354 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 795 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:35:36,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1168 flow [2024-06-04 15:35:36,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1094 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:36,370 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 853 flow [2024-06-04 15:35:36,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=853, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-04 15:35:36,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 15:35:36,371 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 853 flow [2024-06-04 15:35:36,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:36,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:36,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:35:36,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:36,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash -18086619, now seen corresponding path program 2 times [2024-06-04 15:35:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542856955] [2024-06-04 15:35:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:37,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:37,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542856955] [2024-06-04 15:35:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542856955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:37,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870638366] [2024-06-04 15:35:37,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:37,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:37,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:37,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:37,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:37,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:37,564 INFO L124 PetriNetUnfolderBase]: 1844/2768 cut-off events. [2024-06-04 15:35:37,564 INFO L125 PetriNetUnfolderBase]: For 24742/24800 co-relation queries the response was YES. [2024-06-04 15:35:37,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14292 conditions, 2768 events. 1844/2768 cut-off events. For 24742/24800 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13008 event pairs, 545 based on Foata normal form. 34/2755 useless extension candidates. Maximal degree in co-relation 14247. Up to 2419 conditions per place. [2024-06-04 15:35:37,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 89 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-04 15:35:37,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 1401 flow [2024-06-04 15:35:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:35:37,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-04 15:35:37,585 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 853 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:35:37,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 1401 flow [2024-06-04 15:35:37,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 1374 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:37,600 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1061 flow [2024-06-04 15:35:37,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1061, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-04 15:35:37,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-04 15:35:37,601 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1061 flow [2024-06-04 15:35:37,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:37,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:37,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:37,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:35:37,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:37,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1564055973, now seen corresponding path program 3 times [2024-06-04 15:35:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765180527] [2024-06-04 15:35:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:38,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:38,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765180527] [2024-06-04 15:35:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765180527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:38,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:38,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:38,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701416985] [2024-06-04 15:35:38,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:38,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:38,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:38,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:38,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:38,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:38,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1061 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:38,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:38,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:38,747 INFO L124 PetriNetUnfolderBase]: 1886/2832 cut-off events. [2024-06-04 15:35:38,747 INFO L125 PetriNetUnfolderBase]: For 30982/31059 co-relation queries the response was YES. [2024-06-04 15:35:38,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15857 conditions, 2832 events. 1886/2832 cut-off events. For 30982/31059 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13386 event pairs, 560 based on Foata normal form. 37/2815 useless extension candidates. Maximal degree in co-relation 15809. Up to 2296 conditions per place. [2024-06-04 15:35:38,765 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 53 changer transitions 0/156 dead transitions. [2024-06-04 15:35:38,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 156 transitions, 1701 flow [2024-06-04 15:35:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:35:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-04 15:35:38,767 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1061 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:35:38,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 156 transitions, 1701 flow [2024-06-04 15:35:38,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1619 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:38,798 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1293 flow [2024-06-04 15:35:38,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1293, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-04 15:35:38,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-04 15:35:38,799 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1293 flow [2024-06-04 15:35:38,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:38,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:38,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:35:38,800 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)] === [2024-06-04 15:35:38,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 159045087, now seen corresponding path program 2 times [2024-06-04 15:35:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:38,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127987769] [2024-06-04 15:35:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127987769] [2024-06-04 15:35:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127987769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:39,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:39,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638908033] [2024-06-04 15:35:39,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:39,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:39,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:39,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:39,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:39,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:39,978 INFO L124 PetriNetUnfolderBase]: 1976/2941 cut-off events. [2024-06-04 15:35:39,978 INFO L125 PetriNetUnfolderBase]: For 32928/32942 co-relation queries the response was YES. [2024-06-04 15:35:39,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17277 conditions, 2941 events. 1976/2941 cut-off events. For 32928/32942 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13584 event pairs, 625 based on Foata normal form. 12/2950 useless extension candidates. Maximal degree in co-relation 17225. Up to 2846 conditions per place. [2024-06-04 15:35:39,994 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2024-06-04 15:35:39,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1774 flow [2024-06-04 15:35:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:35:39,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:35:39,996 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1293 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:35:39,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1774 flow [2024-06-04 15:35:40,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1688 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:40,024 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1355 flow [2024-06-04 15:35:40,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1355, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-06-04 15:35:40,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 15:35:40,025 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1355 flow [2024-06-04 15:35:40,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:40,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:40,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:35:40,025 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)] === [2024-06-04 15:35:40,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash 744204669, now seen corresponding path program 3 times [2024-06-04 15:35:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928670817] [2024-06-04 15:35:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:40,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:40,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928670817] [2024-06-04 15:35:40,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928670817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:40,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:35:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447426272] [2024-06-04 15:35:40,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:40,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:35:40,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:35:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:35:40,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:40,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1355 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:40,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:40,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:40,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:41,189 INFO L124 PetriNetUnfolderBase]: 1971/2934 cut-off events. [2024-06-04 15:35:41,190 INFO L125 PetriNetUnfolderBase]: For 34840/34854 co-relation queries the response was YES. [2024-06-04 15:35:41,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17535 conditions, 2934 events. 1971/2934 cut-off events. For 34840/34854 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13549 event pairs, 625 based on Foata normal form. 12/2943 useless extension candidates. Maximal degree in co-relation 17480. Up to 2841 conditions per place. [2024-06-04 15:35:41,209 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 27 changer transitions 0/153 dead transitions. [2024-06-04 15:35:41,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1716 flow [2024-06-04 15:35:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:35:41,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-04 15:35:41,211 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1355 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:35:41,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1716 flow [2024-06-04 15:35:41,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1627 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:41,244 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1339 flow [2024-06-04 15:35:41,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-04 15:35:41,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-04 15:35:41,245 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1339 flow [2024-06-04 15:35:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:41,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:41,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:35:41,245 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)] === [2024-06-04 15:35:41,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-04 15:35:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:41,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055637300] [2024-06-04 15:35:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:42,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:42,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055637300] [2024-06-04 15:35:42,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055637300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:42,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:42,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:42,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046019268] [2024-06-04 15:35:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:42,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:42,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:42,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:42,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:42,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:42,729 INFO L124 PetriNetUnfolderBase]: 1963/2920 cut-off events. [2024-06-04 15:35:42,729 INFO L125 PetriNetUnfolderBase]: For 36483/36483 co-relation queries the response was YES. [2024-06-04 15:35:42,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17413 conditions, 2920 events. 1963/2920 cut-off events. For 36483/36483 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13420 event pairs, 600 based on Foata normal form. 4/2922 useless extension candidates. Maximal degree in co-relation 17358. Up to 2862 conditions per place. [2024-06-04 15:35:42,747 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 17 changer transitions 0/159 dead transitions. [2024-06-04 15:35:42,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 159 transitions, 1729 flow [2024-06-04 15:35:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 15:35:42,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:35:42,749 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1339 flow. Second operand 8 states and 124 transitions. [2024-06-04 15:35:42,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 159 transitions, 1729 flow [2024-06-04 15:35:42,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1685 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:42,781 INFO L231 Difference]: Finished difference. Result has 113 places, 136 transitions, 1360 flow [2024-06-04 15:35:42,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=113, PETRI_TRANSITIONS=136} [2024-06-04 15:35:42,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 15:35:42,781 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 136 transitions, 1360 flow [2024-06-04 15:35:42,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:42,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:42,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:35:42,782 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)] === [2024-06-04 15:35:42,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 1 times [2024-06-04 15:35:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:42,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393987784] [2024-06-04 15:35:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:43,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393987784] [2024-06-04 15:35:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393987784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:43,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:43,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:43,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806551323] [2024-06-04 15:35:43,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:43,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:43,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:35:43,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 136 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:43,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:43,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:35:43,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:44,303 INFO L124 PetriNetUnfolderBase]: 1864/2795 cut-off events. [2024-06-04 15:35:44,304 INFO L125 PetriNetUnfolderBase]: For 40900/40960 co-relation queries the response was YES. [2024-06-04 15:35:44,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17159 conditions, 2795 events. 1864/2795 cut-off events. For 40900/40960 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13068 event pairs, 553 based on Foata normal form. 36/2803 useless extension candidates. Maximal degree in co-relation 17103. Up to 2513 conditions per place. [2024-06-04 15:35:44,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 116 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2024-06-04 15:35:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 1834 flow [2024-06-04 15:35:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:35:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:35:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:35:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-04 15:35:44,322 INFO L175 Difference]: Start difference. First operand has 113 places, 136 transitions, 1360 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:35:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 1834 flow [2024-06-04 15:35:44,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 1787 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:44,353 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1437 flow [2024-06-04 15:35:44,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-04 15:35:44,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-04 15:35:44,354 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1437 flow [2024-06-04 15:35:44,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:44,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:44,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:44,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:35:44,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:44,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -564402571, now seen corresponding path program 1 times [2024-06-04 15:35:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159631733] [2024-06-04 15:35:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:44,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159631733] [2024-06-04 15:35:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159631733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:45,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918376358] [2024-06-04 15:35:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:45,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:45,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:45,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:45,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1437 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:45,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:45,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:45,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:45,626 INFO L124 PetriNetUnfolderBase]: 1974/2938 cut-off events. [2024-06-04 15:35:45,627 INFO L125 PetriNetUnfolderBase]: For 43926/43926 co-relation queries the response was YES. [2024-06-04 15:35:45,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18160 conditions, 2938 events. 1974/2938 cut-off events. For 43926/43926 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13403 event pairs, 583 based on Foata normal form. 4/2940 useless extension candidates. Maximal degree in co-relation 18103. Up to 2839 conditions per place. [2024-06-04 15:35:45,646 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-04 15:35:45,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 1997 flow [2024-06-04 15:35:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:35:45,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:35:45,649 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1437 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:35:45,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 1997 flow [2024-06-04 15:35:45,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 180 transitions, 1901 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:35:45,690 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 1548 flow [2024-06-04 15:35:45,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1548, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2024-06-04 15:35:45,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 15:35:45,691 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 1548 flow [2024-06-04 15:35:45,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:45,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:45,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:45,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:35:45,691 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)] === [2024-06-04 15:35:45,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 273191529, now seen corresponding path program 2 times [2024-06-04 15:35:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041196457] [2024-06-04 15:35:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041196457] [2024-06-04 15:35:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041196457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:46,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:46,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:46,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062516839] [2024-06-04 15:35:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:46,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:46,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:46,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:46,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 1548 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:46,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:46,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:46,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:47,045 INFO L124 PetriNetUnfolderBase]: 2124/3154 cut-off events. [2024-06-04 15:35:47,045 INFO L125 PetriNetUnfolderBase]: For 51339/51339 co-relation queries the response was YES. [2024-06-04 15:35:47,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19884 conditions, 3154 events. 2124/3154 cut-off events. For 51339/51339 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14501 event pairs, 541 based on Foata normal form. 4/3156 useless extension candidates. Maximal degree in co-relation 19823. Up to 2855 conditions per place. [2024-06-04 15:35:47,070 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 35 changer transitions 0/198 dead transitions. [2024-06-04 15:35:47,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 2328 flow [2024-06-04 15:35:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:35:47,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-04 15:35:47,072 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 1548 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:35:47,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 2328 flow [2024-06-04 15:35:47,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 198 transitions, 2285 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:47,126 INFO L231 Difference]: Finished difference. Result has 128 places, 164 transitions, 1766 flow [2024-06-04 15:35:47,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1766, PETRI_PLACES=128, PETRI_TRANSITIONS=164} [2024-06-04 15:35:47,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-04 15:35:47,127 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 164 transitions, 1766 flow [2024-06-04 15:35:47,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:47,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:47,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:35:47,128 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)] === [2024-06-04 15:35:47,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -560677921, now seen corresponding path program 3 times [2024-06-04 15:35:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:47,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397453933] [2024-06-04 15:35:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:47,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397453933] [2024-06-04 15:35:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397453933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:47,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:47,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069359889] [2024-06-04 15:35:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:47,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:47,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:47,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 164 transitions, 1766 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:47,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:47,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:47,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:48,466 INFO L124 PetriNetUnfolderBase]: 2110/3136 cut-off events. [2024-06-04 15:35:48,466 INFO L125 PetriNetUnfolderBase]: For 57836/57836 co-relation queries the response was YES. [2024-06-04 15:35:48,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20890 conditions, 3136 events. 2110/3136 cut-off events. For 57836/57836 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14424 event pairs, 532 based on Foata normal form. 8/3142 useless extension candidates. Maximal degree in co-relation 20825. Up to 2851 conditions per place. [2024-06-04 15:35:48,485 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 38 changer transitions 0/198 dead transitions. [2024-06-04 15:35:48,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 198 transitions, 2366 flow [2024-06-04 15:35:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:35:48,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:35:48,488 INFO L175 Difference]: Start difference. First operand has 128 places, 164 transitions, 1766 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:35:48,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 198 transitions, 2366 flow [2024-06-04 15:35:48,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 198 transitions, 2284 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-04 15:35:48,549 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1824 flow [2024-06-04 15:35:48,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=134, PETRI_TRANSITIONS=167} [2024-06-04 15:35:48,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-04 15:35:48,555 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1824 flow [2024-06-04 15:35:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:48,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:48,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:35:48,557 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)] === [2024-06-04 15:35:48,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1451417638, now seen corresponding path program 1 times [2024-06-04 15:35:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578403184] [2024-06-04 15:35:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:49,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578403184] [2024-06-04 15:35:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578403184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:49,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645166277] [2024-06-04 15:35:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:49,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:49,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 167 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:49,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:49,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:49,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:50,354 INFO L124 PetriNetUnfolderBase]: 2099/3119 cut-off events. [2024-06-04 15:35:50,354 INFO L125 PetriNetUnfolderBase]: For 60320/60320 co-relation queries the response was YES. [2024-06-04 15:35:50,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20980 conditions, 3119 events. 2099/3119 cut-off events. For 60320/60320 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14355 event pairs, 576 based on Foata normal form. 2/3119 useless extension candidates. Maximal degree in co-relation 20912. Up to 3064 conditions per place. [2024-06-04 15:35:50,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-04 15:35:50,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 194 transitions, 2296 flow [2024-06-04 15:35:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:35:50,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:35:50,378 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1824 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:35:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 194 transitions, 2296 flow [2024-06-04 15:35:50,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 194 transitions, 2237 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:50,446 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1837 flow [2024-06-04 15:35:50,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1837, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-04 15:35:50,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 15:35:50,446 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1837 flow [2024-06-04 15:35:50,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:50,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:50,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:35:50,447 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)] === [2024-06-04 15:35:50,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1233735989, now seen corresponding path program 4 times [2024-06-04 15:35:50,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:50,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789713870] [2024-06-04 15:35:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:50,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:51,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789713870] [2024-06-04 15:35:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789713870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:51,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:51,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:51,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462297601] [2024-06-04 15:35:51,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:51,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:51,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:51,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:51,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1837 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:51,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:51,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:51,721 INFO L124 PetriNetUnfolderBase]: 2197/3265 cut-off events. [2024-06-04 15:35:51,721 INFO L125 PetriNetUnfolderBase]: For 68682/68684 co-relation queries the response was YES. [2024-06-04 15:35:51,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3265 events. 2197/3265 cut-off events. For 68682/68684 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15153 event pairs, 523 based on Foata normal form. 10/3273 useless extension candidates. Maximal degree in co-relation 21849. Up to 2741 conditions per place. [2024-06-04 15:35:51,747 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 61 changer transitions 0/216 dead transitions. [2024-06-04 15:35:51,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 216 transitions, 2689 flow [2024-06-04 15:35:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:35:51,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-04 15:35:51,748 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1837 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:35:51,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 216 transitions, 2689 flow [2024-06-04 15:35:51,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 216 transitions, 2641 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:51,812 INFO L231 Difference]: Finished difference. Result has 142 places, 183 transitions, 2108 flow [2024-06-04 15:35:51,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=142, PETRI_TRANSITIONS=183} [2024-06-04 15:35:51,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-04 15:35:51,813 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 183 transitions, 2108 flow [2024-06-04 15:35:51,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:51,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:51,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:51,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:35:51,813 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:51,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1233735772, now seen corresponding path program 2 times [2024-06-04 15:35:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:51,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486772602] [2024-06-04 15:35:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:52,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486772602] [2024-06-04 15:35:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486772602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:52,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:52,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:52,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048155473] [2024-06-04 15:35:52,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:52,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:52,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:52,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 183 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:52,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:52,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:52,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:53,307 INFO L124 PetriNetUnfolderBase]: 2198/3268 cut-off events. [2024-06-04 15:35:53,307 INFO L125 PetriNetUnfolderBase]: For 75473/75493 co-relation queries the response was YES. [2024-06-04 15:35:53,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23081 conditions, 3268 events. 2198/3268 cut-off events. For 75473/75493 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15160 event pairs, 526 based on Foata normal form. 13/3278 useless extension candidates. Maximal degree in co-relation 23009. Up to 2921 conditions per place. [2024-06-04 15:35:53,334 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-04 15:35:53,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 224 transitions, 2884 flow [2024-06-04 15:35:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:35:53,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-04 15:35:53,335 INFO L175 Difference]: Start difference. First operand has 142 places, 183 transitions, 2108 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:35:53,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 224 transitions, 2884 flow [2024-06-04 15:35:53,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 224 transitions, 2758 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-04 15:35:53,421 INFO L231 Difference]: Finished difference. Result has 150 places, 195 transitions, 2334 flow [2024-06-04 15:35:53,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=150, PETRI_TRANSITIONS=195} [2024-06-04 15:35:53,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-04 15:35:53,422 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 195 transitions, 2334 flow [2024-06-04 15:35:53,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:53,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:53,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:53,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:35:53,423 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:53,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1233468862, now seen corresponding path program 3 times [2024-06-04 15:35:53,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:53,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479776008] [2024-06-04 15:35:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:53,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479776008] [2024-06-04 15:35:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479776008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:54,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:54,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755052821] [2024-06-04 15:35:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:54,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:54,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:54,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:54,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 195 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:54,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:54,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:54,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:54,895 INFO L124 PetriNetUnfolderBase]: 2219/3297 cut-off events. [2024-06-04 15:35:54,895 INFO L125 PetriNetUnfolderBase]: For 79597/79617 co-relation queries the response was YES. [2024-06-04 15:35:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23546 conditions, 3297 events. 2219/3297 cut-off events. For 79597/79617 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15336 event pairs, 519 based on Foata normal form. 9/3303 useless extension candidates. Maximal degree in co-relation 23470. Up to 2823 conditions per place. [2024-06-04 15:35:54,923 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 74 changer transitions 0/229 dead transitions. [2024-06-04 15:35:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 3104 flow [2024-06-04 15:35:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:35:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:35:54,925 INFO L175 Difference]: Start difference. First operand has 150 places, 195 transitions, 2334 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:35:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 3104 flow [2024-06-04 15:35:55,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 229 transitions, 2998 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:55,020 INFO L231 Difference]: Finished difference. Result has 155 places, 199 transitions, 2472 flow [2024-06-04 15:35:55,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2472, PETRI_PLACES=155, PETRI_TRANSITIONS=199} [2024-06-04 15:35:55,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-04 15:35:55,021 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 199 transitions, 2472 flow [2024-06-04 15:35:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:55,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:55,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:55,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:35:55,022 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:55,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash 635426323, now seen corresponding path program 5 times [2024-06-04 15:35:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:55,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270977924] [2024-06-04 15:35:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:55,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270977924] [2024-06-04 15:35:55,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270977924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:55,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:55,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017240758] [2024-06-04 15:35:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:55,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:55,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 199 transitions, 2472 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:55,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:55,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:55,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:56,397 INFO L124 PetriNetUnfolderBase]: 2241/3329 cut-off events. [2024-06-04 15:35:56,398 INFO L125 PetriNetUnfolderBase]: For 87271/87291 co-relation queries the response was YES. [2024-06-04 15:35:56,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 3329 events. 2241/3329 cut-off events. For 87271/87291 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15465 event pairs, 531 based on Foata normal form. 11/3337 useless extension candidates. Maximal degree in co-relation 24266. Up to 2765 conditions per place. [2024-06-04 15:35:56,427 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 77 changer transitions 0/236 dead transitions. [2024-06-04 15:35:56,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 236 transitions, 3386 flow [2024-06-04 15:35:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 15:35:56,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-04 15:35:56,429 INFO L175 Difference]: Start difference. First operand has 155 places, 199 transitions, 2472 flow. Second operand 8 states and 146 transitions. [2024-06-04 15:35:56,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 236 transitions, 3386 flow [2024-06-04 15:35:56,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 236 transitions, 3216 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:56,538 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2538 flow [2024-06-04 15:35:56,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-06-04 15:35:56,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-04 15:35:56,539 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2538 flow [2024-06-04 15:35:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:56,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:56,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:35:56,540 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)] === [2024-06-04 15:35:56,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1595308168, now seen corresponding path program 4 times [2024-06-04 15:35:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:56,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208007087] [2024-06-04 15:35:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:57,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208007087] [2024-06-04 15:35:57,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208007087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:57,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:57,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695880439] [2024-06-04 15:35:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:57,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:57,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:57,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:57,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:57,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:58,109 INFO L124 PetriNetUnfolderBase]: 2236/3320 cut-off events. [2024-06-04 15:35:58,109 INFO L125 PetriNetUnfolderBase]: For 91255/91277 co-relation queries the response was YES. [2024-06-04 15:35:58,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24463 conditions, 3320 events. 2236/3320 cut-off events. For 91255/91277 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15429 event pairs, 561 based on Foata normal form. 18/3335 useless extension candidates. Maximal degree in co-relation 24384. Up to 3218 conditions per place. [2024-06-04 15:35:58,136 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 29 changer transitions 0/228 dead transitions. [2024-06-04 15:35:58,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 3074 flow [2024-06-04 15:35:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:35:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:35:58,139 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2538 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:35:58,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 3074 flow [2024-06-04 15:35:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 228 transitions, 2902 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 15:35:58,255 INFO L231 Difference]: Finished difference. Result has 161 places, 205 transitions, 2462 flow [2024-06-04 15:35:58,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2462, PETRI_PLACES=161, PETRI_TRANSITIONS=205} [2024-06-04 15:35:58,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 15:35:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 205 transitions, 2462 flow [2024-06-04 15:35:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:58,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:58,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:35:58,256 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:58,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1595307951, now seen corresponding path program 6 times [2024-06-04 15:35:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:58,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74670991] [2024-06-04 15:35:58,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:58,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:35:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:35:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:35:58,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74670991] [2024-06-04 15:35:58,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74670991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:35:58,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:35:58,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:35:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174048072] [2024-06-04 15:35:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:35:58,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:35:58,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:35:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:35:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:35:58,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:35:58,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 205 transitions, 2462 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:58,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:35:58,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:35:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:35:59,406 INFO L124 PetriNetUnfolderBase]: 2216/3294 cut-off events. [2024-06-04 15:35:59,407 INFO L125 PetriNetUnfolderBase]: For 94955/94975 co-relation queries the response was YES. [2024-06-04 15:35:59,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23789 conditions, 3294 events. 2216/3294 cut-off events. For 94955/94975 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15270 event pairs, 534 based on Foata normal form. 15/3306 useless extension candidates. Maximal degree in co-relation 23710. Up to 2750 conditions per place. [2024-06-04 15:35:59,433 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 159 selfloop transitions, 74 changer transitions 0/236 dead transitions. [2024-06-04 15:35:59,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 3220 flow [2024-06-04 15:35:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:35:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:35:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:35:59,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-04 15:35:59,435 INFO L175 Difference]: Start difference. First operand has 161 places, 205 transitions, 2462 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:35:59,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 3220 flow [2024-06-04 15:35:59,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 236 transitions, 3128 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:35:59,550 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 2530 flow [2024-06-04 15:35:59,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-06-04 15:35:59,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-04 15:35:59,551 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 2530 flow [2024-06-04 15:35:59,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:35:59,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:35:59,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:35:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:35:59,552 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:35:59,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:35:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash -924280083, now seen corresponding path program 1 times [2024-06-04 15:35:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:35:59,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844338691] [2024-06-04 15:35:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:35:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:35:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:00,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844338691] [2024-06-04 15:36:00,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844338691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:00,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:36:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059002224] [2024-06-04 15:36:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:36:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:00,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:36:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:36:00,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:00,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:00,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:00,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:00,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:00,828 INFO L124 PetriNetUnfolderBase]: 2152/3194 cut-off events. [2024-06-04 15:36:00,828 INFO L125 PetriNetUnfolderBase]: For 96428/96450 co-relation queries the response was YES. [2024-06-04 15:36:00,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23475 conditions, 3194 events. 2152/3194 cut-off events. For 96428/96450 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14772 event pairs, 546 based on Foata normal form. 20/3211 useless extension candidates. Maximal degree in co-relation 23395. Up to 3136 conditions per place. [2024-06-04 15:36:00,859 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 20 changer transitions 0/213 dead transitions. [2024-06-04 15:36:00,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2972 flow [2024-06-04 15:36:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:36:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:36:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-04 15:36:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-04 15:36:00,861 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 2530 flow. Second operand 5 states and 84 transitions. [2024-06-04 15:36:00,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2972 flow [2024-06-04 15:36:00,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 213 transitions, 2820 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:00,978 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 2429 flow [2024-06-04 15:36:00,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2429, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-06-04 15:36:00,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-04 15:36:00,984 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 2429 flow [2024-06-04 15:36:00,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:00,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:00,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:00,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:36:00,985 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)] === [2024-06-04 15:36:00,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -451885852, now seen corresponding path program 1 times [2024-06-04 15:36:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382358209] [2024-06-04 15:36:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382358209] [2024-06-04 15:36:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382358209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368141784] [2024-06-04 15:36:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:01,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:02,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:36:02,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 2429 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:02,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:02,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:36:02,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:02,776 INFO L124 PetriNetUnfolderBase]: 2172/3249 cut-off events. [2024-06-04 15:36:02,777 INFO L125 PetriNetUnfolderBase]: For 111922/111944 co-relation queries the response was YES. [2024-06-04 15:36:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3249 events. 2172/3249 cut-off events. For 111922/111944 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15405 event pairs, 361 based on Foata normal form. 22/3220 useless extension candidates. Maximal degree in co-relation 23875. Up to 2833 conditions per place. [2024-06-04 15:36:02,804 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 177 selfloop transitions, 39 changer transitions 0/253 dead transitions. [2024-06-04 15:36:02,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 253 transitions, 3155 flow [2024-06-04 15:36:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:36:02,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-04 15:36:02,806 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 2429 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:36:02,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 253 transitions, 3155 flow [2024-06-04 15:36:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 253 transitions, 3102 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:02,918 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 2535 flow [2024-06-04 15:36:02,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2024-06-04 15:36:02,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 15:36:02,920 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 2535 flow [2024-06-04 15:36:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:02,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:02,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:02,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:36:02,921 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)] === [2024-06-04 15:36:02,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1926003314, now seen corresponding path program 1 times [2024-06-04 15:36:02,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:02,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206925618] [2024-06-04 15:36:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:03,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:03,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206925618] [2024-06-04 15:36:03,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206925618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:03,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:03,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:03,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677593005] [2024-06-04 15:36:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:03,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:03,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 2535 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:03,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:03,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:03,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:04,616 INFO L124 PetriNetUnfolderBase]: 2244/3336 cut-off events. [2024-06-04 15:36:04,616 INFO L125 PetriNetUnfolderBase]: For 106291/106291 co-relation queries the response was YES. [2024-06-04 15:36:04,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24979 conditions, 3336 events. 2244/3336 cut-off events. For 106291/106291 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15662 event pairs, 532 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 24897. Up to 3219 conditions per place. [2024-06-04 15:36:04,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-04 15:36:04,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 240 transitions, 3097 flow [2024-06-04 15:36:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:36:04,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-04 15:36:04,649 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 2535 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:36:04,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 240 transitions, 3097 flow [2024-06-04 15:36:04,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 240 transitions, 2996 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:04,764 INFO L231 Difference]: Finished difference. Result has 171 places, 210 transitions, 2498 flow [2024-06-04 15:36:04,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2498, PETRI_PLACES=171, PETRI_TRANSITIONS=210} [2024-06-04 15:36:04,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-04 15:36:04,764 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 210 transitions, 2498 flow [2024-06-04 15:36:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:04,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:04,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:36:04,765 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:04,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash -319410268, now seen corresponding path program 2 times [2024-06-04 15:36:04,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994273413] [2024-06-04 15:36:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:05,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994273413] [2024-06-04 15:36:05,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994273413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:05,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:05,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:05,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887106651] [2024-06-04 15:36:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:05,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:05,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:05,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:36:05,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 210 transitions, 2498 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:05,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:05,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:36:05,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:06,680 INFO L124 PetriNetUnfolderBase]: 2221/3332 cut-off events. [2024-06-04 15:36:06,681 INFO L125 PetriNetUnfolderBase]: For 126512/126537 co-relation queries the response was YES. [2024-06-04 15:36:06,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25364 conditions, 3332 events. 2221/3332 cut-off events. For 126512/126537 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15992 event pairs, 489 based on Foata normal form. 20/3304 useless extension candidates. Maximal degree in co-relation 25281. Up to 2937 conditions per place. [2024-06-04 15:36:06,710 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 47 changer transitions 0/253 dead transitions. [2024-06-04 15:36:06,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 253 transitions, 3206 flow [2024-06-04 15:36:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 15:36:06,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-04 15:36:06,711 INFO L175 Difference]: Start difference. First operand has 171 places, 210 transitions, 2498 flow. Second operand 8 states and 156 transitions. [2024-06-04 15:36:06,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 253 transitions, 3206 flow [2024-06-04 15:36:06,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 253 transitions, 3158 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:06,827 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2600 flow [2024-06-04 15:36:06,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-04 15:36:06,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 15:36:06,832 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2600 flow [2024-06-04 15:36:06,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:06,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:06,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:36:06,834 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:06,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash -316608798, now seen corresponding path program 1 times [2024-06-04 15:36:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164559561] [2024-06-04 15:36:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:06,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:07,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164559561] [2024-06-04 15:36:07,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164559561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:07,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:07,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456368824] [2024-06-04 15:36:07,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:07,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:07,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:07,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2600 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:07,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:07,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:07,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:08,593 INFO L124 PetriNetUnfolderBase]: 2335/3475 cut-off events. [2024-06-04 15:36:08,593 INFO L125 PetriNetUnfolderBase]: For 122026/122026 co-relation queries the response was YES. [2024-06-04 15:36:08,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26395 conditions, 3475 events. 2335/3475 cut-off events. For 122026/122026 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16516 event pairs, 523 based on Foata normal form. 4/3477 useless extension candidates. Maximal degree in co-relation 26311. Up to 3353 conditions per place. [2024-06-04 15:36:08,624 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 223 selfloop transitions, 24 changer transitions 0/250 dead transitions. [2024-06-04 15:36:08,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 250 transitions, 3239 flow [2024-06-04 15:36:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:36:08,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-04 15:36:08,627 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2600 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:36:08,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 250 transitions, 3239 flow [2024-06-04 15:36:08,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 250 transitions, 3095 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:08,760 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2559 flow [2024-06-04 15:36:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2559, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-04 15:36:08,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-04 15:36:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2559 flow [2024-06-04 15:36:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:08,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:36:08,762 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -201144648, now seen corresponding path program 2 times [2024-06-04 15:36:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131001184] [2024-06-04 15:36:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:09,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131001184] [2024-06-04 15:36:09,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131001184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:09,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:09,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440108884] [2024-06-04 15:36:09,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:09,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:09,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:09,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2559 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:09,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:09,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:09,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:10,582 INFO L124 PetriNetUnfolderBase]: 2357/3507 cut-off events. [2024-06-04 15:36:10,583 INFO L125 PetriNetUnfolderBase]: For 126917/126917 co-relation queries the response was YES. [2024-06-04 15:36:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26620 conditions, 3507 events. 2357/3507 cut-off events. For 126917/126917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16700 event pairs, 516 based on Foata normal form. 4/3509 useless extension candidates. Maximal degree in co-relation 26535. Up to 3290 conditions per place. [2024-06-04 15:36:10,619 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 42 changer transitions 0/251 dead transitions. [2024-06-04 15:36:10,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3199 flow [2024-06-04 15:36:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:36:10,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-04 15:36:10,628 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2559 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:36:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3199 flow [2024-06-04 15:36:10,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3149 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:10,805 INFO L231 Difference]: Finished difference. Result has 181 places, 218 transitions, 2651 flow [2024-06-04 15:36:10,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2651, PETRI_PLACES=181, PETRI_TRANSITIONS=218} [2024-06-04 15:36:10,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-04 15:36:10,806 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 218 transitions, 2651 flow [2024-06-04 15:36:10,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:10,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:10,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:10,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:36:10,806 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:10,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -201137890, now seen corresponding path program 1 times [2024-06-04 15:36:10,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:10,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715034408] [2024-06-04 15:36:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:10,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:11,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:11,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715034408] [2024-06-04 15:36:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715034408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:11,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992078801] [2024-06-04 15:36:11,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:11,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:11,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:11,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 218 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:11,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:11,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:11,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:12,436 INFO L124 PetriNetUnfolderBase]: 2374/3534 cut-off events. [2024-06-04 15:36:12,436 INFO L125 PetriNetUnfolderBase]: For 134939/134939 co-relation queries the response was YES. [2024-06-04 15:36:12,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27116 conditions, 3534 events. 2374/3534 cut-off events. For 134939/134939 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16834 event pairs, 536 based on Foata normal form. 4/3536 useless extension candidates. Maximal degree in co-relation 27030. Up to 3461 conditions per place. [2024-06-04 15:36:12,466 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 20 changer transitions 0/250 dead transitions. [2024-06-04 15:36:12,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 3255 flow [2024-06-04 15:36:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 15:36:12,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-04 15:36:12,468 INFO L175 Difference]: Start difference. First operand has 181 places, 218 transitions, 2651 flow. Second operand 9 states and 141 transitions. [2024-06-04 15:36:12,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 3255 flow [2024-06-04 15:36:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 3159 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:12,667 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2638 flow [2024-06-04 15:36:12,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2638, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-04 15:36:12,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-04 15:36:12,667 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2638 flow [2024-06-04 15:36:12,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:12,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:12,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:12,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:36:12,668 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:12,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -201322588, now seen corresponding path program 3 times [2024-06-04 15:36:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135878517] [2024-06-04 15:36:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135878517] [2024-06-04 15:36:13,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135878517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:13,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:13,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:13,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390966966] [2024-06-04 15:36:13,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:13,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:13,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:13,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:13,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:13,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:36:13,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2638 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:36:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:14,289 INFO L124 PetriNetUnfolderBase]: 2355/3542 cut-off events. [2024-06-04 15:36:14,289 INFO L125 PetriNetUnfolderBase]: For 158858/158887 co-relation queries the response was YES. [2024-06-04 15:36:14,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27743 conditions, 3542 events. 2355/3542 cut-off events. For 158858/158887 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17259 event pairs, 490 based on Foata normal form. 20/3512 useless extension candidates. Maximal degree in co-relation 27656. Up to 3073 conditions per place. [2024-06-04 15:36:14,327 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 59 changer transitions 0/263 dead transitions. [2024-06-04 15:36:14,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 3448 flow [2024-06-04 15:36:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 15:36:14,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-04 15:36:14,328 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2638 flow. Second operand 8 states and 157 transitions. [2024-06-04 15:36:14,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 3448 flow [2024-06-04 15:36:14,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 3383 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:14,493 INFO L231 Difference]: Finished difference. Result has 185 places, 222 transitions, 2748 flow [2024-06-04 15:36:14,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2748, PETRI_PLACES=185, PETRI_TRANSITIONS=222} [2024-06-04 15:36:14,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-04 15:36:14,494 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 222 transitions, 2748 flow [2024-06-04 15:36:14,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:14,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:14,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:36:14,494 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:14,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2044095830, now seen corresponding path program 3 times [2024-06-04 15:36:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:14,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458158148] [2024-06-04 15:36:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:15,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458158148] [2024-06-04 15:36:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458158148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:15,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:36:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279285359] [2024-06-04 15:36:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:36:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:36:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:36:15,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:15,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 222 transitions, 2748 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:15,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:15,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:15,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:16,072 INFO L124 PetriNetUnfolderBase]: 2446/3650 cut-off events. [2024-06-04 15:36:16,072 INFO L125 PetriNetUnfolderBase]: For 149679/149679 co-relation queries the response was YES. [2024-06-04 15:36:16,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 3650 events. 2446/3650 cut-off events. For 149679/149679 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17570 event pairs, 549 based on Foata normal form. 4/3652 useless extension candidates. Maximal degree in co-relation 28371. Up to 3373 conditions per place. [2024-06-04 15:36:16,110 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 50 changer transitions 0/250 dead transitions. [2024-06-04 15:36:16,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 250 transitions, 3326 flow [2024-06-04 15:36:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:36:16,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-04 15:36:16,112 INFO L175 Difference]: Start difference. First operand has 185 places, 222 transitions, 2748 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:36:16,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 250 transitions, 3326 flow [2024-06-04 15:36:16,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 3181 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:16,332 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2724 flow [2024-06-04 15:36:16,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2724, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-04 15:36:16,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 15:36:16,332 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2724 flow [2024-06-04 15:36:16,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:16,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:16,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:36:16,333 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:16,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1548537860, now seen corresponding path program 2 times [2024-06-04 15:36:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602209357] [2024-06-04 15:36:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:16,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:17,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602209357] [2024-06-04 15:36:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602209357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:17,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704764305] [2024-06-04 15:36:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:17,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:17,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:17,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2724 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:17,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:17,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:17,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:18,066 INFO L124 PetriNetUnfolderBase]: 2538/3805 cut-off events. [2024-06-04 15:36:18,067 INFO L125 PetriNetUnfolderBase]: For 169527/169529 co-relation queries the response was YES. [2024-06-04 15:36:18,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29133 conditions, 3805 events. 2538/3805 cut-off events. For 169527/169529 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18644 event pairs, 532 based on Foata normal form. 26/3829 useless extension candidates. Maximal degree in co-relation 29044. Up to 3316 conditions per place. [2024-06-04 15:36:18,106 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 65 changer transitions 0/260 dead transitions. [2024-06-04 15:36:18,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 260 transitions, 3398 flow [2024-06-04 15:36:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:36:18,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:36:18,108 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2724 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:36:18,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 260 transitions, 3398 flow [2024-06-04 15:36:18,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 260 transitions, 3247 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:18,306 INFO L231 Difference]: Finished difference. Result has 188 places, 224 transitions, 2751 flow [2024-06-04 15:36:18,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2751, PETRI_PLACES=188, PETRI_TRANSITIONS=224} [2024-06-04 15:36:18,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-04 15:36:18,307 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 224 transitions, 2751 flow [2024-06-04 15:36:18,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:18,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:18,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:18,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:36:18,308 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:18,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:18,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1540263650, now seen corresponding path program 3 times [2024-06-04 15:36:18,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008605482] [2024-06-04 15:36:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:19,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:19,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008605482] [2024-06-04 15:36:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008605482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:19,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:19,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32060584] [2024-06-04 15:36:19,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:19,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:19,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:19,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 224 transitions, 2751 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:19,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:19,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:19,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:20,134 INFO L124 PetriNetUnfolderBase]: 2555/3830 cut-off events. [2024-06-04 15:36:20,135 INFO L125 PetriNetUnfolderBase]: For 144789/144793 co-relation queries the response was YES. [2024-06-04 15:36:20,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29173 conditions, 3830 events. 2555/3830 cut-off events. For 144789/144793 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18809 event pairs, 580 based on Foata normal form. 8/3836 useless extension candidates. Maximal degree in co-relation 29083. Up to 3657 conditions per place. [2024-06-04 15:36:20,237 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2024-06-04 15:36:20,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 261 transitions, 3429 flow [2024-06-04 15:36:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-04 15:36:20,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-04 15:36:20,238 INFO L175 Difference]: Start difference. First operand has 188 places, 224 transitions, 2751 flow. Second operand 10 states and 156 transitions. [2024-06-04 15:36:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 261 transitions, 3429 flow [2024-06-04 15:36:20,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 261 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:20,413 INFO L231 Difference]: Finished difference. Result has 192 places, 229 transitions, 2787 flow [2024-06-04 15:36:20,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2787, PETRI_PLACES=192, PETRI_TRANSITIONS=229} [2024-06-04 15:36:20,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-04 15:36:20,413 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 229 transitions, 2787 flow [2024-06-04 15:36:20,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:20,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:20,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:36:20,414 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1539966980, now seen corresponding path program 4 times [2024-06-04 15:36:20,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10974080] [2024-06-04 15:36:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:21,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:21,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10974080] [2024-06-04 15:36:21,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10974080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:21,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:21,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809797615] [2024-06-04 15:36:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:21,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:21,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 229 transitions, 2787 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:21,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:21,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:21,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:22,385 INFO L124 PetriNetUnfolderBase]: 2572/3857 cut-off events. [2024-06-04 15:36:22,386 INFO L125 PetriNetUnfolderBase]: For 152462/152466 co-relation queries the response was YES. [2024-06-04 15:36:22,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29513 conditions, 3857 events. 2572/3857 cut-off events. For 152462/152466 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18992 event pairs, 545 based on Foata normal form. 8/3863 useless extension candidates. Maximal degree in co-relation 29421. Up to 3601 conditions per place. [2024-06-04 15:36:22,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 52 changer transitions 0/264 dead transitions. [2024-06-04 15:36:22,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 3613 flow [2024-06-04 15:36:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:36:22,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-04 15:36:22,425 INFO L175 Difference]: Start difference. First operand has 192 places, 229 transitions, 2787 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:36:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 3613 flow [2024-06-04 15:36:22,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 264 transitions, 3499 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:22,657 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2876 flow [2024-06-04 15:36:22,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2876, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-04 15:36:22,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 15:36:22,657 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2876 flow [2024-06-04 15:36:22,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:22,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:22,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:36:22,658 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:22,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1776439010, now seen corresponding path program 5 times [2024-06-04 15:36:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:22,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205228173] [2024-06-04 15:36:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:22,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205228173] [2024-06-04 15:36:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205228173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:23,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:23,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394537542] [2024-06-04 15:36:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:23,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:23,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2876 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:23,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:23,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:23,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:24,337 INFO L124 PetriNetUnfolderBase]: 2629/3958 cut-off events. [2024-06-04 15:36:24,337 INFO L125 PetriNetUnfolderBase]: For 170518/170520 co-relation queries the response was YES. [2024-06-04 15:36:24,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29887 conditions, 3958 events. 2629/3958 cut-off events. For 170518/170520 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19686 event pairs, 555 based on Foata normal form. 30/3986 useless extension candidates. Maximal degree in co-relation 29794. Up to 3459 conditions per place. [2024-06-04 15:36:24,373 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 64 changer transitions 0/270 dead transitions. [2024-06-04 15:36:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 270 transitions, 3552 flow [2024-06-04 15:36:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:36:24,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-04 15:36:24,375 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2876 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:36:24,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 270 transitions, 3552 flow [2024-06-04 15:36:24,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3426 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:24,589 INFO L231 Difference]: Finished difference. Result has 199 places, 234 transitions, 2921 flow [2024-06-04 15:36:24,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2921, PETRI_PLACES=199, PETRI_TRANSITIONS=234} [2024-06-04 15:36:24,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-04 15:36:24,590 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 234 transitions, 2921 flow [2024-06-04 15:36:24,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:24,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:24,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:36:24,590 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:24,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1776623708, now seen corresponding path program 4 times [2024-06-04 15:36:24,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:24,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251367378] [2024-06-04 15:36:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:24,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:25,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251367378] [2024-06-04 15:36:25,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251367378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:25,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674090280] [2024-06-04 15:36:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:25,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:25,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:25,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-04 15:36:25,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 234 transitions, 2921 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:25,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:25,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-04 15:36:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:26,391 INFO L124 PetriNetUnfolderBase]: 2559/3897 cut-off events. [2024-06-04 15:36:26,391 INFO L125 PetriNetUnfolderBase]: For 184498/184539 co-relation queries the response was YES. [2024-06-04 15:36:26,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30031 conditions, 3897 events. 2559/3897 cut-off events. For 184498/184539 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19827 event pairs, 535 based on Foata normal form. 20/3859 useless extension candidates. Maximal degree in co-relation 29935. Up to 3224 conditions per place. [2024-06-04 15:36:26,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 70 changer transitions 0/276 dead transitions. [2024-06-04 15:36:26,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 276 transitions, 3859 flow [2024-06-04 15:36:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:36:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:36:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:36:26,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-04 15:36:26,433 INFO L175 Difference]: Start difference. First operand has 199 places, 234 transitions, 2921 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:36:26,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 276 transitions, 3859 flow [2024-06-04 15:36:26,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 3603 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-04 15:36:26,622 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2872 flow [2024-06-04 15:36:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2872, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2024-06-04 15:36:26,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-04 15:36:26,623 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2872 flow [2024-06-04 15:36:26,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-04 15:36:26,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:26,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:26,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:36:26,624 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:26,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash -312270390, now seen corresponding path program 1 times [2024-06-04 15:36:26,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:26,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732656696] [2024-06-04 15:36:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:27,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:27,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732656696] [2024-06-04 15:36:27,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732656696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:27,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:27,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485329036] [2024-06-04 15:36:27,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:27,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:27,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:27,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:27,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2872 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:27,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:27,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:27,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:28,376 INFO L124 PetriNetUnfolderBase]: 2693/4059 cut-off events. [2024-06-04 15:36:28,377 INFO L125 PetriNetUnfolderBase]: For 165302/165302 co-relation queries the response was YES. [2024-06-04 15:36:28,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30830 conditions, 4059 events. 2693/4059 cut-off events. For 165302/165302 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20258 event pairs, 438 based on Foata normal form. 4/4061 useless extension candidates. Maximal degree in co-relation 30733. Up to 3925 conditions per place. [2024-06-04 15:36:28,419 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-04 15:36:28,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 277 transitions, 3616 flow [2024-06-04 15:36:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:36:28,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-04 15:36:28,421 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2872 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:36:28,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 277 transitions, 3616 flow [2024-06-04 15:36:28,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 277 transitions, 3453 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:28,634 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2874 flow [2024-06-04 15:36:28,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-04 15:36:28,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 15:36:28,635 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2874 flow [2024-06-04 15:36:28,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:28,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:28,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:28,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:36:28,636 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:28,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1311778308, now seen corresponding path program 2 times [2024-06-04 15:36:28,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:28,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572909222] [2024-06-04 15:36:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:28,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:29,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572909222] [2024-06-04 15:36:29,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572909222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:29,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:29,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:29,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182176580] [2024-06-04 15:36:29,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:29,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:29,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:29,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:29,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2874 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:29,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:29,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:29,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:30,776 INFO L124 PetriNetUnfolderBase]: 2710/4086 cut-off events. [2024-06-04 15:36:30,777 INFO L125 PetriNetUnfolderBase]: For 171165/171165 co-relation queries the response was YES. [2024-06-04 15:36:30,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30890 conditions, 4086 events. 2710/4086 cut-off events. For 171165/171165 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20544 event pairs, 552 based on Foata normal form. 4/4088 useless extension candidates. Maximal degree in co-relation 30790. Up to 3946 conditions per place. [2024-06-04 15:36:30,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 28 changer transitions 0/279 dead transitions. [2024-06-04 15:36:30,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 3568 flow [2024-06-04 15:36:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:36:30,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-04 15:36:30,825 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2874 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:36:30,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 3568 flow [2024-06-04 15:36:31,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 3466 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 15:36:31,137 INFO L231 Difference]: Finished difference. Result has 208 places, 244 transitions, 2882 flow [2024-06-04 15:36:31,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2882, PETRI_PLACES=208, PETRI_TRANSITIONS=244} [2024-06-04 15:36:31,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 15:36:31,139 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 244 transitions, 2882 flow [2024-06-04 15:36:31,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:31,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:31,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:31,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:36:31,139 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:31,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash -423441566, now seen corresponding path program 3 times [2024-06-04 15:36:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758556927] [2024-06-04 15:36:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:31,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758556927] [2024-06-04 15:36:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758556927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:32,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311313523] [2024-06-04 15:36:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:32,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:32,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:32,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 244 transitions, 2882 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:32,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:32,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:32,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:33,203 INFO L124 PetriNetUnfolderBase]: 2863/4323 cut-off events. [2024-06-04 15:36:33,203 INFO L125 PetriNetUnfolderBase]: For 184503/184503 co-relation queries the response was YES. [2024-06-04 15:36:33,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33004 conditions, 4323 events. 2863/4323 cut-off events. For 184503/184503 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21931 event pairs, 558 based on Foata normal form. 4/4322 useless extension candidates. Maximal degree in co-relation 32902. Up to 4104 conditions per place. [2024-06-04 15:36:33,249 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 39 changer transitions 0/306 dead transitions. [2024-06-04 15:36:33,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 306 transitions, 4145 flow [2024-06-04 15:36:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-04 15:36:33,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-04 15:36:33,251 INFO L175 Difference]: Start difference. First operand has 208 places, 244 transitions, 2882 flow. Second operand 10 states and 158 transitions. [2024-06-04 15:36:33,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 306 transitions, 4145 flow [2024-06-04 15:36:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 3973 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:33,562 INFO L231 Difference]: Finished difference. Result has 215 places, 270 transitions, 3342 flow [2024-06-04 15:36:33,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3342, PETRI_PLACES=215, PETRI_TRANSITIONS=270} [2024-06-04 15:36:33,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 15:36:33,563 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 270 transitions, 3342 flow [2024-06-04 15:36:33,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:33,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:33,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:33,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:36:33,564 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:33,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash -336595934, now seen corresponding path program 1 times [2024-06-04 15:36:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:33,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25378641] [2024-06-04 15:36:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:34,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:34,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25378641] [2024-06-04 15:36:34,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25378641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:34,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:34,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767928735] [2024-06-04 15:36:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:34,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:34,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 270 transitions, 3342 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:34,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:34,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:35,653 INFO L124 PetriNetUnfolderBase]: 2938/4446 cut-off events. [2024-06-04 15:36:35,653 INFO L125 PetriNetUnfolderBase]: For 207427/207443 co-relation queries the response was YES. [2024-06-04 15:36:35,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33869 conditions, 4446 events. 2938/4446 cut-off events. For 207427/207443 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22787 event pairs, 564 based on Foata normal form. 36/4480 useless extension candidates. Maximal degree in co-relation 33762. Up to 4122 conditions per place. [2024-06-04 15:36:35,705 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 272 selfloop transitions, 39 changer transitions 0/314 dead transitions. [2024-06-04 15:36:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 314 transitions, 4133 flow [2024-06-04 15:36:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 15:36:35,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:36:35,707 INFO L175 Difference]: Start difference. First operand has 215 places, 270 transitions, 3342 flow. Second operand 10 states and 165 transitions. [2024-06-04 15:36:35,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 314 transitions, 4133 flow [2024-06-04 15:36:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 314 transitions, 4057 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-04 15:36:36,045 INFO L231 Difference]: Finished difference. Result has 224 places, 271 transitions, 3379 flow [2024-06-04 15:36:36,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3379, PETRI_PLACES=224, PETRI_TRANSITIONS=271} [2024-06-04 15:36:36,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 15:36:36,048 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 271 transitions, 3379 flow [2024-06-04 15:36:36,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:36,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:36,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:36:36,048 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:36,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:36,049 INFO L85 PathProgramCache]: Analyzing trace with hash 544103400, now seen corresponding path program 4 times [2024-06-04 15:36:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:36,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207110655] [2024-06-04 15:36:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:36,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:37,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207110655] [2024-06-04 15:36:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207110655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:37,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:37,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:37,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118461107] [2024-06-04 15:36:37,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:37,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:37,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:37,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:37,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 271 transitions, 3379 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:37,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:37,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:37,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:38,041 INFO L124 PetriNetUnfolderBase]: 2955/4475 cut-off events. [2024-06-04 15:36:38,042 INFO L125 PetriNetUnfolderBase]: For 202529/202529 co-relation queries the response was YES. [2024-06-04 15:36:38,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34332 conditions, 4475 events. 2955/4475 cut-off events. For 202529/202529 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22976 event pairs, 580 based on Foata normal form. 4/4477 useless extension candidates. Maximal degree in co-relation 34222. Up to 4050 conditions per place. [2024-06-04 15:36:38,096 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 67 changer transitions 0/305 dead transitions. [2024-06-04 15:36:38,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 4127 flow [2024-06-04 15:36:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:36:38,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-04 15:36:38,098 INFO L175 Difference]: Start difference. First operand has 224 places, 271 transitions, 3379 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:36:38,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 4127 flow [2024-06-04 15:36:38,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 305 transitions, 4025 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 15:36:38,422 INFO L231 Difference]: Finished difference. Result has 224 places, 273 transitions, 3474 flow [2024-06-04 15:36:38,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3474, PETRI_PLACES=224, PETRI_TRANSITIONS=273} [2024-06-04 15:36:38,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 15:36:38,423 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 273 transitions, 3474 flow [2024-06-04 15:36:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:38,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:38,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:36:38,424 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1945877422, now seen corresponding path program 2 times [2024-06-04 15:36:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817740702] [2024-06-04 15:36:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817740702] [2024-06-04 15:36:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817740702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:39,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053505362] [2024-06-04 15:36:39,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:39,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:39,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 273 transitions, 3474 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:39,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:39,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:39,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:40,601 INFO L124 PetriNetUnfolderBase]: 3041/4616 cut-off events. [2024-06-04 15:36:40,601 INFO L125 PetriNetUnfolderBase]: For 227641/227641 co-relation queries the response was YES. [2024-06-04 15:36:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 4616 events. 3041/4616 cut-off events. For 227641/227641 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23995 event pairs, 590 based on Foata normal form. 20/4634 useless extension candidates. Maximal degree in co-relation 35254. Up to 4067 conditions per place. [2024-06-04 15:36:40,657 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 71 changer transitions 0/318 dead transitions. [2024-06-04 15:36:40,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 318 transitions, 4313 flow [2024-06-04 15:36:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:36:40,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:36:40,659 INFO L175 Difference]: Start difference. First operand has 224 places, 273 transitions, 3474 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:36:40,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 318 transitions, 4313 flow [2024-06-04 15:36:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 318 transitions, 4128 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:41,080 INFO L231 Difference]: Finished difference. Result has 227 places, 277 transitions, 3516 flow [2024-06-04 15:36:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3295, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3516, PETRI_PLACES=227, PETRI_TRANSITIONS=277} [2024-06-04 15:36:41,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-04 15:36:41,081 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 277 transitions, 3516 flow [2024-06-04 15:36:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:41,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:36:41,086 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:41,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1051965330, now seen corresponding path program 3 times [2024-06-04 15:36:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:41,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199128912] [2024-06-04 15:36:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:41,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199128912] [2024-06-04 15:36:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199128912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:41,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:36:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384170110] [2024-06-04 15:36:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:36:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:36:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:36:41,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:41,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 277 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:41,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:42,922 INFO L124 PetriNetUnfolderBase]: 3235/4934 cut-off events. [2024-06-04 15:36:42,922 INFO L125 PetriNetUnfolderBase]: For 260378/260378 co-relation queries the response was YES. [2024-06-04 15:36:42,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38391 conditions, 4934 events. 3235/4934 cut-off events. For 260378/260378 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26243 event pairs, 621 based on Foata normal form. 16/4948 useless extension candidates. Maximal degree in co-relation 38279. Up to 3850 conditions per place. [2024-06-04 15:36:42,982 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 75 changer transitions 0/321 dead transitions. [2024-06-04 15:36:42,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 321 transitions, 4558 flow [2024-06-04 15:36:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:36:42,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:36:42,983 INFO L175 Difference]: Start difference. First operand has 227 places, 277 transitions, 3516 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:36:42,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 321 transitions, 4558 flow [2024-06-04 15:36:43,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 321 transitions, 4427 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:36:43,345 INFO L231 Difference]: Finished difference. Result has 230 places, 279 transitions, 3607 flow [2024-06-04 15:36:43,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3607, PETRI_PLACES=230, PETRI_TRANSITIONS=279} [2024-06-04 15:36:43,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 15:36:43,345 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 279 transitions, 3607 flow [2024-06-04 15:36:43,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:43,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:43,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:43,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:36:43,346 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:43,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1940313232, now seen corresponding path program 4 times [2024-06-04 15:36:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:43,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501324139] [2024-06-04 15:36:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:44,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501324139] [2024-06-04 15:36:44,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501324139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:44,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:44,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498537649] [2024-06-04 15:36:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:44,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:44,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:44,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 279 transitions, 3607 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:44,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:44,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:44,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:45,407 INFO L124 PetriNetUnfolderBase]: 3302/5047 cut-off events. [2024-06-04 15:36:45,408 INFO L125 PetriNetUnfolderBase]: For 275930/275930 co-relation queries the response was YES. [2024-06-04 15:36:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38962 conditions, 5047 events. 3302/5047 cut-off events. For 275930/275930 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27162 event pairs, 652 based on Foata normal form. 24/5069 useless extension candidates. Maximal degree in co-relation 38849. Up to 4498 conditions per place. [2024-06-04 15:36:45,461 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 77 changer transitions 0/327 dead transitions. [2024-06-04 15:36:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 327 transitions, 4467 flow [2024-06-04 15:36:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:36:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:36:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 15:36:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057649667405765 [2024-06-04 15:36:45,463 INFO L175 Difference]: Start difference. First operand has 230 places, 279 transitions, 3607 flow. Second operand 11 states and 183 transitions. [2024-06-04 15:36:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 327 transitions, 4467 flow [2024-06-04 15:36:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 327 transitions, 4356 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:45,872 INFO L231 Difference]: Finished difference. Result has 236 places, 281 transitions, 3723 flow [2024-06-04 15:36:45,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3723, PETRI_PLACES=236, PETRI_TRANSITIONS=281} [2024-06-04 15:36:45,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 15:36:45,873 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 281 transitions, 3723 flow [2024-06-04 15:36:45,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:45,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:45,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:36:45,874 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:45,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1052174580, now seen corresponding path program 5 times [2024-06-04 15:36:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:45,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342259378] [2024-06-04 15:36:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:46,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:46,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342259378] [2024-06-04 15:36:46,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342259378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:46,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:46,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:46,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418254030] [2024-06-04 15:36:46,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:46,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:46,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:46,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:46,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 281 transitions, 3723 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:46,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:46,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:46,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:48,175 INFO L124 PetriNetUnfolderBase]: 3327/5094 cut-off events. [2024-06-04 15:36:48,175 INFO L125 PetriNetUnfolderBase]: For 274668/274668 co-relation queries the response was YES. [2024-06-04 15:36:48,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39246 conditions, 5094 events. 3327/5094 cut-off events. For 274668/274668 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27495 event pairs, 655 based on Foata normal form. 20/5112 useless extension candidates. Maximal degree in co-relation 39131. Up to 4313 conditions per place. [2024-06-04 15:36:48,227 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 77 changer transitions 0/323 dead transitions. [2024-06-04 15:36:48,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 323 transitions, 4533 flow [2024-06-04 15:36:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:36:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:36:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-04 15:36:48,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-04 15:36:48,236 INFO L175 Difference]: Start difference. First operand has 236 places, 281 transitions, 3723 flow. Second operand 10 states and 168 transitions. [2024-06-04 15:36:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 323 transitions, 4533 flow [2024-06-04 15:36:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 323 transitions, 4330 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-04 15:36:48,671 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3728 flow [2024-06-04 15:36:48,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3728, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-04 15:36:48,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 15:36:48,671 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3728 flow [2024-06-04 15:36:48,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:48,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:36:48,672 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:48,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1057690782, now seen corresponding path program 5 times [2024-06-04 15:36:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783703937] [2024-06-04 15:36:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:49,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783703937] [2024-06-04 15:36:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783703937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:49,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830712341] [2024-06-04 15:36:49,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:49,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:49,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3728 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:49,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:49,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:49,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:50,824 INFO L124 PetriNetUnfolderBase]: 3344/5121 cut-off events. [2024-06-04 15:36:50,824 INFO L125 PetriNetUnfolderBase]: For 265649/265649 co-relation queries the response was YES. [2024-06-04 15:36:50,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39424 conditions, 5121 events. 3344/5121 cut-off events. For 265649/265649 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27758 event pairs, 669 based on Foata normal form. 4/5123 useless extension candidates. Maximal degree in co-relation 39308. Up to 4513 conditions per place. [2024-06-04 15:36:50,878 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 75 changer transitions 0/322 dead transitions. [2024-06-04 15:36:50,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4592 flow [2024-06-04 15:36:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:36:50,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:36:50,879 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3728 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:36:50,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4592 flow [2024-06-04 15:36:51,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 4430 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 15:36:51,345 INFO L231 Difference]: Finished difference. Result has 239 places, 286 transitions, 3850 flow [2024-06-04 15:36:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3850, PETRI_PLACES=239, PETRI_TRANSITIONS=286} [2024-06-04 15:36:51,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 15:36:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 286 transitions, 3850 flow [2024-06-04 15:36:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:36:51,346 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 759245308, now seen corresponding path program 6 times [2024-06-04 15:36:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454966891] [2024-06-04 15:36:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:52,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:52,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454966891] [2024-06-04 15:36:52,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454966891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:52,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:52,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130757339] [2024-06-04 15:36:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:52,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:52,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:52,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:52,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 286 transitions, 3850 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:52,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:52,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:52,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:53,466 INFO L124 PetriNetUnfolderBase]: 3361/5150 cut-off events. [2024-06-04 15:36:53,466 INFO L125 PetriNetUnfolderBase]: For 277357/277359 co-relation queries the response was YES. [2024-06-04 15:36:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39948 conditions, 5150 events. 3361/5150 cut-off events. For 277357/277359 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27858 event pairs, 658 based on Foata normal form. 6/5152 useless extension candidates. Maximal degree in co-relation 39830. Up to 4464 conditions per place. [2024-06-04 15:36:53,522 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 208 selfloop transitions, 108 changer transitions 0/319 dead transitions. [2024-06-04 15:36:53,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 319 transitions, 4640 flow [2024-06-04 15:36:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:36:53,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-04 15:36:53,524 INFO L175 Difference]: Start difference. First operand has 239 places, 286 transitions, 3850 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:36:53,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 319 transitions, 4640 flow [2024-06-04 15:36:54,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 319 transitions, 4475 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:54,041 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3978 flow [2024-06-04 15:36:54,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3978, PETRI_PLACES=243, PETRI_TRANSITIONS=288} [2024-06-04 15:36:54,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 15:36:54,042 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3978 flow [2024-06-04 15:36:54,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:54,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:54,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:54,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:36:54,042 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:54,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:54,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1310226046, now seen corresponding path program 7 times [2024-06-04 15:36:54,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:54,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671574936] [2024-06-04 15:36:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:54,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:54,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671574936] [2024-06-04 15:36:54,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671574936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:54,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:54,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:54,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8141390] [2024-06-04 15:36:54,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:54,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:54,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:55,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:55,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 288 transitions, 3978 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:55,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:55,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:55,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:56,101 INFO L124 PetriNetUnfolderBase]: 3514/5397 cut-off events. [2024-06-04 15:36:56,101 INFO L125 PetriNetUnfolderBase]: For 321978/321980 co-relation queries the response was YES. [2024-06-04 15:36:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43393 conditions, 5397 events. 3514/5397 cut-off events. For 321978/321980 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29601 event pairs, 705 based on Foata normal form. 6/5399 useless extension candidates. Maximal degree in co-relation 43273. Up to 4460 conditions per place. [2024-06-04 15:36:56,165 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 112 changer transitions 0/330 dead transitions. [2024-06-04 15:36:56,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 330 transitions, 5100 flow [2024-06-04 15:36:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:36:56,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-04 15:36:56,184 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3978 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:36:56,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 330 transitions, 5100 flow [2024-06-04 15:36:56,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 330 transitions, 4825 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 15:36:56,671 INFO L231 Difference]: Finished difference. Result has 246 places, 293 transitions, 4107 flow [2024-06-04 15:36:56,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4107, PETRI_PLACES=246, PETRI_TRANSITIONS=293} [2024-06-04 15:36:56,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 15:36:56,672 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 293 transitions, 4107 flow [2024-06-04 15:36:56,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:56,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:56,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:56,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:36:56,672 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:56,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 764751838, now seen corresponding path program 8 times [2024-06-04 15:36:56,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:56,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002728406] [2024-06-04 15:36:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:36:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:36:57,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:36:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002728406] [2024-06-04 15:36:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002728406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:36:57,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:36:57,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:36:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083633779] [2024-06-04 15:36:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:36:57,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:36:57,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:36:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:36:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:36:57,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:36:57,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 293 transitions, 4107 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:57,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:36:57,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:36:57,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:36:59,069 INFO L124 PetriNetUnfolderBase]: 3606/5549 cut-off events. [2024-06-04 15:36:59,069 INFO L125 PetriNetUnfolderBase]: For 364561/364563 co-relation queries the response was YES. [2024-06-04 15:36:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44842 conditions, 5549 events. 3606/5549 cut-off events. For 364561/364563 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30694 event pairs, 722 based on Foata normal form. 26/5571 useless extension candidates. Maximal degree in co-relation 44720. Up to 4743 conditions per place. [2024-06-04 15:36:59,124 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 103 changer transitions 0/330 dead transitions. [2024-06-04 15:36:59,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 330 transitions, 4957 flow [2024-06-04 15:36:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:36:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:36:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:36:59,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-04 15:36:59,126 INFO L175 Difference]: Start difference. First operand has 246 places, 293 transitions, 4107 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:36:59,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 330 transitions, 4957 flow [2024-06-04 15:36:59,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 330 transitions, 4726 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-04 15:36:59,775 INFO L231 Difference]: Finished difference. Result has 250 places, 295 transitions, 4171 flow [2024-06-04 15:36:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4171, PETRI_PLACES=250, PETRI_TRANSITIONS=295} [2024-06-04 15:36:59,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 15:36:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 295 transitions, 4171 flow [2024-06-04 15:36:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:36:59,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:36:59,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:36:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:36:59,776 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:36:59,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:36:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 56649836, now seen corresponding path program 6 times [2024-06-04 15:36:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:36:59,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661967187] [2024-06-04 15:36:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:36:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:36:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:00,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661967187] [2024-06-04 15:37:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661967187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:00,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:00,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:37:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349532384] [2024-06-04 15:37:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:00,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:37:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:37:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:37:00,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:00,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 295 transitions, 4171 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:00,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:00,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:00,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:01,929 INFO L124 PetriNetUnfolderBase]: 3725/5750 cut-off events. [2024-06-04 15:37:01,929 INFO L125 PetriNetUnfolderBase]: For 378948/378950 co-relation queries the response was YES. [2024-06-04 15:37:01,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46535 conditions, 5750 events. 3725/5750 cut-off events. For 378948/378950 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32103 event pairs, 651 based on Foata normal form. 18/5764 useless extension candidates. Maximal degree in co-relation 46411. Up to 3287 conditions per place. [2024-06-04 15:37:01,997 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 137 changer transitions 0/343 dead transitions. [2024-06-04 15:37:01,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 343 transitions, 5318 flow [2024-06-04 15:37:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:37:01,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-04 15:37:01,998 INFO L175 Difference]: Start difference. First operand has 250 places, 295 transitions, 4171 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:37:01,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 343 transitions, 5318 flow [2024-06-04 15:37:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 343 transitions, 5075 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:02,662 INFO L231 Difference]: Finished difference. Result has 254 places, 298 transitions, 4376 flow [2024-06-04 15:37:02,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4376, PETRI_PLACES=254, PETRI_TRANSITIONS=298} [2024-06-04 15:37:02,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 15:37:02,663 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 298 transitions, 4376 flow [2024-06-04 15:37:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:02,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:02,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:02,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:37:02,663 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:02,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:02,664 INFO L85 PathProgramCache]: Analyzing trace with hash 764967040, now seen corresponding path program 7 times [2024-06-04 15:37:02,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:02,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832259368] [2024-06-04 15:37:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:02,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:03,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832259368] [2024-06-04 15:37:03,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832259368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:03,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:03,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239907730] [2024-06-04 15:37:03,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:03,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:03,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 298 transitions, 4376 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:03,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:03,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:03,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:04,888 INFO L124 PetriNetUnfolderBase]: 3844/5951 cut-off events. [2024-06-04 15:37:04,888 INFO L125 PetriNetUnfolderBase]: For 410907/410909 co-relation queries the response was YES. [2024-06-04 15:37:04,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49064 conditions, 5951 events. 3844/5951 cut-off events. For 410907/410909 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33784 event pairs, 809 based on Foata normal form. 18/5965 useless extension candidates. Maximal degree in co-relation 48938. Up to 4792 conditions per place. [2024-06-04 15:37:04,959 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 105 changer transitions 0/340 dead transitions. [2024-06-04 15:37:04,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 340 transitions, 5484 flow [2024-06-04 15:37:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:37:04,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:37:04,969 INFO L175 Difference]: Start difference. First operand has 254 places, 298 transitions, 4376 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:37:04,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 340 transitions, 5484 flow [2024-06-04 15:37:05,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 340 transitions, 5290 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:05,756 INFO L231 Difference]: Finished difference. Result has 256 places, 300 transitions, 4486 flow [2024-06-04 15:37:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=256, PETRI_TRANSITIONS=300} [2024-06-04 15:37:05,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-04 15:37:05,757 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 300 transitions, 4486 flow [2024-06-04 15:37:05,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:05,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:05,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:37:05,757 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:05,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 958691248, now seen corresponding path program 9 times [2024-06-04 15:37:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316708135] [2024-06-04 15:37:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:06,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316708135] [2024-06-04 15:37:06,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316708135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:06,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:06,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:37:06,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265108585] [2024-06-04 15:37:06,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:06,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:37:06,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:37:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:37:06,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:06,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 300 transitions, 4486 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:06,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:06,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:06,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:08,006 INFO L124 PetriNetUnfolderBase]: 3800/5883 cut-off events. [2024-06-04 15:37:08,007 INFO L125 PetriNetUnfolderBase]: For 399350/399352 co-relation queries the response was YES. [2024-06-04 15:37:08,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47457 conditions, 5883 events. 3800/5883 cut-off events. For 399350/399352 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33412 event pairs, 770 based on Foata normal form. 26/5905 useless extension candidates. Maximal degree in co-relation 47331. Up to 5077 conditions per place. [2024-06-04 15:37:08,078 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 108 changer transitions 0/335 dead transitions. [2024-06-04 15:37:08,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 335 transitions, 5270 flow [2024-06-04 15:37:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:37:08,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-04 15:37:08,079 INFO L175 Difference]: Start difference. First operand has 256 places, 300 transitions, 4486 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:37:08,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 335 transitions, 5270 flow [2024-06-04 15:37:08,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 335 transitions, 5063 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:08,919 INFO L231 Difference]: Finished difference. Result has 260 places, 300 transitions, 4504 flow [2024-06-04 15:37:08,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4504, PETRI_PLACES=260, PETRI_TRANSITIONS=300} [2024-06-04 15:37:08,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-04 15:37:08,919 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 300 transitions, 4504 flow [2024-06-04 15:37:08,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:08,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:08,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:37:08,920 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:08,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash -11030222, now seen corresponding path program 8 times [2024-06-04 15:37:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537267437] [2024-06-04 15:37:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:08,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537267437] [2024-06-04 15:37:09,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537267437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:09,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:09,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:09,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044020689] [2024-06-04 15:37:09,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:09,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:09,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:09,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:09,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 300 transitions, 4504 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:09,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:09,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:10,840 INFO L124 PetriNetUnfolderBase]: 3808/5903 cut-off events. [2024-06-04 15:37:10,841 INFO L125 PetriNetUnfolderBase]: For 385279/385281 co-relation queries the response was YES. [2024-06-04 15:37:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47189 conditions, 5903 events. 3808/5903 cut-off events. For 385279/385281 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33572 event pairs, 762 based on Foata normal form. 18/5917 useless extension candidates. Maximal degree in co-relation 47061. Up to 4744 conditions per place. [2024-06-04 15:37:10,915 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 110 changer transitions 0/341 dead transitions. [2024-06-04 15:37:10,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 341 transitions, 5577 flow [2024-06-04 15:37:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:37:10,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-04 15:37:10,921 INFO L175 Difference]: Start difference. First operand has 260 places, 300 transitions, 4504 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:37:10,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 341 transitions, 5577 flow [2024-06-04 15:37:11,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 341 transitions, 5358 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:11,692 INFO L231 Difference]: Finished difference. Result has 262 places, 301 transitions, 4553 flow [2024-06-04 15:37:11,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4553, PETRI_PLACES=262, PETRI_TRANSITIONS=301} [2024-06-04 15:37:11,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-04 15:37:11,693 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 301 transitions, 4553 flow [2024-06-04 15:37:11,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:11,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:11,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:11,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:37:11,693 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:11,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash -29093810, now seen corresponding path program 10 times [2024-06-04 15:37:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:11,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249725279] [2024-06-04 15:37:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:11,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249725279] [2024-06-04 15:37:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249725279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:12,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:12,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:37:12,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011515827] [2024-06-04 15:37:12,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:12,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:37:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:37:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:37:12,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:12,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 301 transitions, 4553 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:12,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:12,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:12,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:14,115 INFO L124 PetriNetUnfolderBase]: 4038/6247 cut-off events. [2024-06-04 15:37:14,115 INFO L125 PetriNetUnfolderBase]: For 386344/386360 co-relation queries the response was YES. [2024-06-04 15:37:14,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50487 conditions, 6247 events. 4038/6247 cut-off events. For 386344/386360 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35842 event pairs, 866 based on Foata normal form. 20/6265 useless extension candidates. Maximal degree in co-relation 50358. Up to 5931 conditions per place. [2024-06-04 15:37:14,197 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 315 selfloop transitions, 67 changer transitions 0/385 dead transitions. [2024-06-04 15:37:14,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 385 transitions, 6369 flow [2024-06-04 15:37:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:37:14,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:37:14,200 INFO L175 Difference]: Start difference. First operand has 262 places, 301 transitions, 4553 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:37:14,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 385 transitions, 6369 flow [2024-06-04 15:37:15,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 385 transitions, 5900 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:15,122 INFO L231 Difference]: Finished difference. Result has 267 places, 345 transitions, 5249 flow [2024-06-04 15:37:15,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5249, PETRI_PLACES=267, PETRI_TRANSITIONS=345} [2024-06-04 15:37:15,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-04 15:37:15,123 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 345 transitions, 5249 flow [2024-06-04 15:37:15,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:15,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:15,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:15,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:37:15,123 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:15,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash 780820738, now seen corresponding path program 11 times [2024-06-04 15:37:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:15,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229305758] [2024-06-04 15:37:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229305758] [2024-06-04 15:37:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229305758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:37:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078620830] [2024-06-04 15:37:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:37:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:37:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:37:16,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:16,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 345 transitions, 5249 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:16,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:16,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:16,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:17,628 INFO L124 PetriNetUnfolderBase]: 4215/6510 cut-off events. [2024-06-04 15:37:17,629 INFO L125 PetriNetUnfolderBase]: For 395224/395228 co-relation queries the response was YES. [2024-06-04 15:37:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52395 conditions, 6510 events. 4215/6510 cut-off events. For 395224/395228 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37456 event pairs, 876 based on Foata normal form. 8/6516 useless extension candidates. Maximal degree in co-relation 52263. Up to 6100 conditions per place. [2024-06-04 15:37:17,714 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 336 selfloop transitions, 97 changer transitions 0/436 dead transitions. [2024-06-04 15:37:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 436 transitions, 7465 flow [2024-06-04 15:37:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 15:37:17,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-04 15:37:17,715 INFO L175 Difference]: Start difference. First operand has 267 places, 345 transitions, 5249 flow. Second operand 10 states and 165 transitions. [2024-06-04 15:37:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 436 transitions, 7465 flow [2024-06-04 15:37:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 436 transitions, 7193 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:18,819 INFO L231 Difference]: Finished difference. Result has 277 places, 397 transitions, 6538 flow [2024-06-04 15:37:18,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6538, PETRI_PLACES=277, PETRI_TRANSITIONS=397} [2024-06-04 15:37:18,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-04 15:37:18,820 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 397 transitions, 6538 flow [2024-06-04 15:37:18,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:18,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:18,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:37:18,820 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)] === [2024-06-04 15:37:18,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 818418856, now seen corresponding path program 1 times [2024-06-04 15:37:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470641115] [2024-06-04 15:37:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:19,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:19,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470641115] [2024-06-04 15:37:19,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470641115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644546829] [2024-06-04 15:37:19,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:19,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:19,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:19,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 397 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:20,793 INFO L124 PetriNetUnfolderBase]: 4220/6523 cut-off events. [2024-06-04 15:37:20,793 INFO L125 PetriNetUnfolderBase]: For 405352/405352 co-relation queries the response was YES. [2024-06-04 15:37:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53350 conditions, 6523 events. 4220/6523 cut-off events. For 405352/405352 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37632 event pairs, 1076 based on Foata normal form. 1/6522 useless extension candidates. Maximal degree in co-relation 53212. Up to 6460 conditions per place. [2024-06-04 15:37:20,875 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 22 changer transitions 0/419 dead transitions. [2024-06-04 15:37:20,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 419 transitions, 7700 flow [2024-06-04 15:37:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 15:37:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-04 15:37:20,877 INFO L175 Difference]: Start difference. First operand has 277 places, 397 transitions, 6538 flow. Second operand 7 states and 110 transitions. [2024-06-04 15:37:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 419 transitions, 7700 flow [2024-06-04 15:37:21,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 419 transitions, 7580 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:21,916 INFO L231 Difference]: Finished difference. Result has 281 places, 403 transitions, 6638 flow [2024-06-04 15:37:21,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6418, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6638, PETRI_PLACES=281, PETRI_TRANSITIONS=403} [2024-06-04 15:37:21,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-04 15:37:21,916 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 403 transitions, 6638 flow [2024-06-04 15:37:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:21,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:21,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:21,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:37:21,917 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)] === [2024-06-04 15:37:21,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1924145346, now seen corresponding path program 2 times [2024-06-04 15:37:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:21,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910887023] [2024-06-04 15:37:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:21,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910887023] [2024-06-04 15:37:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910887023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:22,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:22,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363056126] [2024-06-04 15:37:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:22,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:22,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 403 transitions, 6638 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:23,987 INFO L124 PetriNetUnfolderBase]: 4230/6537 cut-off events. [2024-06-04 15:37:23,987 INFO L125 PetriNetUnfolderBase]: For 415736/415736 co-relation queries the response was YES. [2024-06-04 15:37:24,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53644 conditions, 6537 events. 4230/6537 cut-off events. For 415736/415736 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37691 event pairs, 1076 based on Foata normal form. 1/6536 useless extension candidates. Maximal degree in co-relation 53505. Up to 6486 conditions per place. [2024-06-04 15:37:24,073 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 20 changer transitions 0/421 dead transitions. [2024-06-04 15:37:24,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 421 transitions, 7636 flow [2024-06-04 15:37:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-04 15:37:24,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-04 15:37:24,074 INFO L175 Difference]: Start difference. First operand has 281 places, 403 transitions, 6638 flow. Second operand 7 states and 105 transitions. [2024-06-04 15:37:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 421 transitions, 7636 flow [2024-06-04 15:37:25,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 421 transitions, 7525 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:25,128 INFO L231 Difference]: Finished difference. Result has 285 places, 409 transitions, 6703 flow [2024-06-04 15:37:25,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6703, PETRI_PLACES=285, PETRI_TRANSITIONS=409} [2024-06-04 15:37:25,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-04 15:37:25,129 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 409 transitions, 6703 flow [2024-06-04 15:37:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:25,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:25,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:25,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:37:25,129 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)] === [2024-06-04 15:37:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:25,130 INFO L85 PathProgramCache]: Analyzing trace with hash -846854048, now seen corresponding path program 1 times [2024-06-04 15:37:25,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:25,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99463681] [2024-06-04 15:37:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99463681] [2024-06-04 15:37:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99463681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:25,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602882183] [2024-06-04 15:37:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:25,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:25,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 409 transitions, 6703 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:25,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:25,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:25,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:27,300 INFO L124 PetriNetUnfolderBase]: 4270/6591 cut-off events. [2024-06-04 15:37:27,300 INFO L125 PetriNetUnfolderBase]: For 431795/431803 co-relation queries the response was YES. [2024-06-04 15:37:27,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 6591 events. 4270/6591 cut-off events. For 431795/431803 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38007 event pairs, 987 based on Foata normal form. 12/6599 useless extension candidates. Maximal degree in co-relation 54010. Up to 6402 conditions per place. [2024-06-04 15:37:27,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 48 changer transitions 0/436 dead transitions. [2024-06-04 15:37:27,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 436 transitions, 7876 flow [2024-06-04 15:37:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:37:27,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:37:27,400 INFO L175 Difference]: Start difference. First operand has 285 places, 409 transitions, 6703 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:37:27,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 436 transitions, 7876 flow [2024-06-04 15:37:28,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 436 transitions, 7770 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:28,388 INFO L231 Difference]: Finished difference. Result has 289 places, 420 transitions, 6840 flow [2024-06-04 15:37:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6840, PETRI_PLACES=289, PETRI_TRANSITIONS=420} [2024-06-04 15:37:28,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-04 15:37:28,389 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 420 transitions, 6840 flow [2024-06-04 15:37:28,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:28,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:28,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:28,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:37:28,389 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)] === [2024-06-04 15:37:28,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash 388453792, now seen corresponding path program 2 times [2024-06-04 15:37:28,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:28,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530559154] [2024-06-04 15:37:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:29,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530559154] [2024-06-04 15:37:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530559154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:29,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924089368] [2024-06-04 15:37:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:29,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:29,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 420 transitions, 6840 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:29,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:30,409 INFO L124 PetriNetUnfolderBase]: 4290/6618 cut-off events. [2024-06-04 15:37:30,410 INFO L125 PetriNetUnfolderBase]: For 443026/443034 co-relation queries the response was YES. [2024-06-04 15:37:30,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54676 conditions, 6618 events. 4290/6618 cut-off events. For 443026/443034 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38125 event pairs, 1001 based on Foata normal form. 12/6627 useless extension candidates. Maximal degree in co-relation 54533. Up to 6418 conditions per place. [2024-06-04 15:37:30,506 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 52 changer transitions 0/438 dead transitions. [2024-06-04 15:37:30,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 438 transitions, 7941 flow [2024-06-04 15:37:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:37:30,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:37:30,508 INFO L175 Difference]: Start difference. First operand has 289 places, 420 transitions, 6840 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:37:30,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 438 transitions, 7941 flow [2024-06-04 15:37:31,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 438 transitions, 7865 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:31,554 INFO L231 Difference]: Finished difference. Result has 292 places, 424 transitions, 6939 flow [2024-06-04 15:37:31,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6939, PETRI_PLACES=292, PETRI_TRANSITIONS=424} [2024-06-04 15:37:31,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-04 15:37:31,555 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 424 transitions, 6939 flow [2024-06-04 15:37:31,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:31,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:31,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:37:31,556 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)] === [2024-06-04 15:37:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 388453606, now seen corresponding path program 3 times [2024-06-04 15:37:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798528064] [2024-06-04 15:37:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798528064] [2024-06-04 15:37:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798528064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583383861] [2024-06-04 15:37:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:32,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:32,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:32,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 424 transitions, 6939 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:32,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:32,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:32,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:33,786 INFO L124 PetriNetUnfolderBase]: 4287/6617 cut-off events. [2024-06-04 15:37:33,786 INFO L125 PetriNetUnfolderBase]: For 447893/447893 co-relation queries the response was YES. [2024-06-04 15:37:33,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54805 conditions, 6617 events. 4287/6617 cut-off events. For 447893/447893 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38143 event pairs, 1072 based on Foata normal form. 1/6616 useless extension candidates. Maximal degree in co-relation 54661. Up to 6560 conditions per place. [2024-06-04 15:37:33,888 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 20 changer transitions 0/438 dead transitions. [2024-06-04 15:37:33,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 438 transitions, 7857 flow [2024-06-04 15:37:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-04 15:37:33,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-04 15:37:33,890 INFO L175 Difference]: Start difference. First operand has 292 places, 424 transitions, 6939 flow. Second operand 6 states and 98 transitions. [2024-06-04 15:37:33,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 438 transitions, 7857 flow [2024-06-04 15:37:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 438 transitions, 7725 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 15:37:35,205 INFO L231 Difference]: Finished difference. Result has 295 places, 424 transitions, 6857 flow [2024-06-04 15:37:35,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6857, PETRI_PLACES=295, PETRI_TRANSITIONS=424} [2024-06-04 15:37:35,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-04 15:37:35,206 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 424 transitions, 6857 flow [2024-06-04 15:37:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:35,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:35,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:35,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:37:35,206 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)] === [2024-06-04 15:37:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2044137652, now seen corresponding path program 3 times [2024-06-04 15:37:35,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:35,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961022091] [2024-06-04 15:37:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:35,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:35,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961022091] [2024-06-04 15:37:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961022091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:35,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:37:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535690241] [2024-06-04 15:37:35,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:37:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:37:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:37:35,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:35,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 424 transitions, 6857 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:35,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:35,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:35,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:37,194 INFO L124 PetriNetUnfolderBase]: 4264/6581 cut-off events. [2024-06-04 15:37:37,194 INFO L125 PetriNetUnfolderBase]: For 444516/444524 co-relation queries the response was YES. [2024-06-04 15:37:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54165 conditions, 6581 events. 4264/6581 cut-off events. For 444516/444524 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37898 event pairs, 990 based on Foata normal form. 12/6590 useless extension candidates. Maximal degree in co-relation 54020. Up to 6499 conditions per place. [2024-06-04 15:37:37,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 24 changer transitions 0/433 dead transitions. [2024-06-04 15:37:37,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 433 transitions, 7751 flow [2024-06-04 15:37:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-04 15:37:37,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-04 15:37:37,299 INFO L175 Difference]: Start difference. First operand has 295 places, 424 transitions, 6857 flow. Second operand 6 states and 95 transitions. [2024-06-04 15:37:37,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 433 transitions, 7751 flow [2024-06-04 15:37:38,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 433 transitions, 7697 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 15:37:38,464 INFO L231 Difference]: Finished difference. Result has 296 places, 424 transitions, 6858 flow [2024-06-04 15:37:38,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6858, PETRI_PLACES=296, PETRI_TRANSITIONS=424} [2024-06-04 15:37:38,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 15:37:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 424 transitions, 6858 flow [2024-06-04 15:37:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:38,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:38,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:38,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:37:38,465 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)] === [2024-06-04 15:37:38,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2044146580, now seen corresponding path program 1 times [2024-06-04 15:37:38,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595181175] [2024-06-04 15:37:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:39,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:39,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595181175] [2024-06-04 15:37:39,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595181175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:39,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:39,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639487944] [2024-06-04 15:37:39,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:39,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:39,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:39,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:39,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 424 transitions, 6858 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:39,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:39,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:39,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:41,025 INFO L124 PetriNetUnfolderBase]: 4267/6586 cut-off events. [2024-06-04 15:37:41,025 INFO L125 PetriNetUnfolderBase]: For 453255/453263 co-relation queries the response was YES. [2024-06-04 15:37:41,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54319 conditions, 6586 events. 4267/6586 cut-off events. For 453255/453263 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37859 event pairs, 1016 based on Foata normal form. 12/6595 useless extension candidates. Maximal degree in co-relation 54173. Up to 6493 conditions per place. [2024-06-04 15:37:41,138 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 405 selfloop transitions, 28 changer transitions 0/436 dead transitions. [2024-06-04 15:37:41,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 436 transitions, 7808 flow [2024-06-04 15:37:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:37:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:37:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 15:37:41,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:37:41,139 INFO L175 Difference]: Start difference. First operand has 296 places, 424 transitions, 6858 flow. Second operand 6 states and 96 transitions. [2024-06-04 15:37:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 436 transitions, 7808 flow [2024-06-04 15:37:42,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 436 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:42,223 INFO L231 Difference]: Finished difference. Result has 296 places, 427 transitions, 6854 flow [2024-06-04 15:37:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6728, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6854, PETRI_PLACES=296, PETRI_TRANSITIONS=427} [2024-06-04 15:37:42,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 15:37:42,224 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 427 transitions, 6854 flow [2024-06-04 15:37:42,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:42,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:42,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:37:42,225 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:42,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 786336871, now seen corresponding path program 1 times [2024-06-04 15:37:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481209816] [2024-06-04 15:37:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481209816] [2024-06-04 15:37:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481209816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:43,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:43,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:37:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879680359] [2024-06-04 15:37:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:43,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:37:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:37:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:37:43,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:43,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 427 transitions, 6854 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:43,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:43,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:43,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:45,137 INFO L124 PetriNetUnfolderBase]: 4308/6660 cut-off events. [2024-06-04 15:37:45,137 INFO L125 PetriNetUnfolderBase]: For 481118/481122 co-relation queries the response was YES. [2024-06-04 15:37:45,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55067 conditions, 6660 events. 4308/6660 cut-off events. For 481118/481122 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38383 event pairs, 853 based on Foata normal form. 16/6674 useless extension candidates. Maximal degree in co-relation 54921. Up to 6350 conditions per place. [2024-06-04 15:37:45,226 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 411 selfloop transitions, 54 changer transitions 0/468 dead transitions. [2024-06-04 15:37:45,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 468 transitions, 7962 flow [2024-06-04 15:37:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:37:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:37:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-04 15:37:45,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:37:45,228 INFO L175 Difference]: Start difference. First operand has 296 places, 427 transitions, 6854 flow. Second operand 10 states and 160 transitions. [2024-06-04 15:37:45,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 468 transitions, 7962 flow [2024-06-04 15:37:46,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 468 transitions, 7858 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 15:37:46,454 INFO L231 Difference]: Finished difference. Result has 302 places, 428 transitions, 6912 flow [2024-06-04 15:37:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6912, PETRI_PLACES=302, PETRI_TRANSITIONS=428} [2024-06-04 15:37:46,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 15:37:46,455 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 428 transitions, 6912 flow [2024-06-04 15:37:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:37:46,456 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:46,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash 97252789, now seen corresponding path program 2 times [2024-06-04 15:37:46,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672944481] [2024-06-04 15:37:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:47,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672944481] [2024-06-04 15:37:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672944481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:47,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993357462] [2024-06-04 15:37:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:47,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:47,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:47,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:47,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 428 transitions, 6912 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:47,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:47,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:47,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:49,136 INFO L124 PetriNetUnfolderBase]: 4349/6727 cut-off events. [2024-06-04 15:37:49,136 INFO L125 PetriNetUnfolderBase]: For 495546/495546 co-relation queries the response was YES. [2024-06-04 15:37:49,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55764 conditions, 6727 events. 4349/6727 cut-off events. For 495546/495546 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38950 event pairs, 855 based on Foata normal form. 12/6737 useless extension candidates. Maximal degree in co-relation 55617. Up to 5708 conditions per place. [2024-06-04 15:37:49,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 159 changer transitions 0/464 dead transitions. [2024-06-04 15:37:49,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 464 transitions, 8013 flow [2024-06-04 15:37:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:37:49,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-04 15:37:49,220 INFO L175 Difference]: Start difference. First operand has 302 places, 428 transitions, 6912 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:37:49,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 464 transitions, 8013 flow [2024-06-04 15:37:50,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 464 transitions, 7867 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 15:37:50,563 INFO L231 Difference]: Finished difference. Result has 304 places, 430 transitions, 7220 flow [2024-06-04 15:37:50,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7220, PETRI_PLACES=304, PETRI_TRANSITIONS=430} [2024-06-04 15:37:50,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-04 15:37:50,564 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 430 transitions, 7220 flow [2024-06-04 15:37:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:50,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:50,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:50,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:37:50,564 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:37:50,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -427358589, now seen corresponding path program 3 times [2024-06-04 15:37:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:50,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410772150] [2024-06-04 15:37:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410772150] [2024-06-04 15:37:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410772150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:51,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:51,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:37:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014593336] [2024-06-04 15:37:51,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:51,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:37:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:37:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:37:51,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:51,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 430 transitions, 7220 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:51,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:51,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:51,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:53,262 INFO L124 PetriNetUnfolderBase]: 4329/6695 cut-off events. [2024-06-04 15:37:53,262 INFO L125 PetriNetUnfolderBase]: For 490491/490491 co-relation queries the response was YES. [2024-06-04 15:37:53,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55572 conditions, 6695 events. 4329/6695 cut-off events. For 490491/490491 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38791 event pairs, 850 based on Foata normal form. 12/6705 useless extension candidates. Maximal degree in co-relation 55423. Up to 5923 conditions per place. [2024-06-04 15:37:53,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 135 changer transitions 0/464 dead transitions. [2024-06-04 15:37:53,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 464 transitions, 8262 flow [2024-06-04 15:37:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:37:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:37:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:37:53,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-04 15:37:53,360 INFO L175 Difference]: Start difference. First operand has 304 places, 430 transitions, 7220 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:37:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 464 transitions, 8262 flow [2024-06-04 15:37:54,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 464 transitions, 7943 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:37:54,812 INFO L231 Difference]: Finished difference. Result has 307 places, 430 transitions, 7184 flow [2024-06-04 15:37:54,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6901, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7184, PETRI_PLACES=307, PETRI_TRANSITIONS=430} [2024-06-04 15:37:54,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-04 15:37:54,813 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 430 transitions, 7184 flow [2024-06-04 15:37:54,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:37:54,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:54,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:54,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:37:54,814 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)] === [2024-06-04 15:37:54,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash -730052620, now seen corresponding path program 1 times [2024-06-04 15:37:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037864819] [2024-06-04 15:37:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:55,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037864819] [2024-06-04 15:37:55,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037864819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:55,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:55,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:55,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596548629] [2024-06-04 15:37:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:55,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:55,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 430 transitions, 7184 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:37:55,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:55,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:55,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:37:56,921 INFO L124 PetriNetUnfolderBase]: 4359/6742 cut-off events. [2024-06-04 15:37:56,922 INFO L125 PetriNetUnfolderBase]: For 488742/488750 co-relation queries the response was YES. [2024-06-04 15:37:56,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55749 conditions, 6742 events. 4359/6742 cut-off events. For 488742/488750 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39178 event pairs, 998 based on Foata normal form. 12/6751 useless extension candidates. Maximal degree in co-relation 55599. Up to 6468 conditions per place. [2024-06-04 15:37:57,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 387 selfloop transitions, 68 changer transitions 0/458 dead transitions. [2024-06-04 15:37:57,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 458 transitions, 8394 flow [2024-06-04 15:37:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:37:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:37:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:37:57,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-04 15:37:57,014 INFO L175 Difference]: Start difference. First operand has 307 places, 430 transitions, 7184 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:37:57,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 458 transitions, 8394 flow [2024-06-04 15:37:58,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 458 transitions, 8105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 15:37:58,333 INFO L231 Difference]: Finished difference. Result has 308 places, 438 transitions, 7142 flow [2024-06-04 15:37:58,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7142, PETRI_PLACES=308, PETRI_TRANSITIONS=438} [2024-06-04 15:37:58,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 15:37:58,334 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 438 transitions, 7142 flow [2024-06-04 15:37:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:37:58,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:37:58,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:37:58,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:37:58,335 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)] === [2024-06-04 15:37:58,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:37:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1383597388, now seen corresponding path program 2 times [2024-06-04 15:37:58,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:37:58,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115206473] [2024-06-04 15:37:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:37:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:37:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:37:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:37:59,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:37:59,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115206473] [2024-06-04 15:37:59,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115206473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:37:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:37:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:37:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676657210] [2024-06-04 15:37:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:37:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:37:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:37:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:37:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:37:59,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:37:59,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 438 transitions, 7142 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:37:59,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:37:59,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:37:59,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:00,591 INFO L124 PetriNetUnfolderBase]: 4379/6768 cut-off events. [2024-06-04 15:38:00,591 INFO L125 PetriNetUnfolderBase]: For 496541/496543 co-relation queries the response was YES. [2024-06-04 15:38:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55621 conditions, 6768 events. 4379/6768 cut-off events. For 496541/496543 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39217 event pairs, 945 based on Foata normal form. 6/6769 useless extension candidates. Maximal degree in co-relation 55469. Up to 6484 conditions per place. [2024-06-04 15:38:00,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 59 changer transitions 0/456 dead transitions. [2024-06-04 15:38:00,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 456 transitions, 8287 flow [2024-06-04 15:38:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 15:38:00,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:38:00,690 INFO L175 Difference]: Start difference. First operand has 308 places, 438 transitions, 7142 flow. Second operand 6 states and 102 transitions. [2024-06-04 15:38:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 456 transitions, 8287 flow [2024-06-04 15:38:02,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 456 transitions, 8199 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:02,396 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 7210 flow [2024-06-04 15:38:02,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7061, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7210, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-04 15:38:02,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 15:38:02,397 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 7210 flow [2024-06-04 15:38:02,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:02,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:02,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:38:02,401 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)] === [2024-06-04 15:38:02,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1383586228, now seen corresponding path program 3 times [2024-06-04 15:38:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:02,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31356523] [2024-06-04 15:38:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31356523] [2024-06-04 15:38:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31356523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:03,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:03,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648237984] [2024-06-04 15:38:03,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:03,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:03,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:03,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:03,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 7210 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:03,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:03,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:03,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:04,551 INFO L124 PetriNetUnfolderBase]: 4367/6754 cut-off events. [2024-06-04 15:38:04,552 INFO L125 PetriNetUnfolderBase]: For 501193/501201 co-relation queries the response was YES. [2024-06-04 15:38:04,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55433 conditions, 6754 events. 4367/6754 cut-off events. For 501193/501201 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39237 event pairs, 984 based on Foata normal form. 12/6763 useless extension candidates. Maximal degree in co-relation 55280. Up to 6476 conditions per place. [2024-06-04 15:38:04,645 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 394 selfloop transitions, 61 changer transitions 0/458 dead transitions. [2024-06-04 15:38:04,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 458 transitions, 8194 flow [2024-06-04 15:38:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:38:04,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-04 15:38:04,646 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 7210 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:38:04,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 458 transitions, 8194 flow [2024-06-04 15:38:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 458 transitions, 8071 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:06,302 INFO L231 Difference]: Finished difference. Result has 313 places, 441 transitions, 7221 flow [2024-06-04 15:38:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7221, PETRI_PLACES=313, PETRI_TRANSITIONS=441} [2024-06-04 15:38:06,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-04 15:38:06,303 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 441 transitions, 7221 flow [2024-06-04 15:38:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:06,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:06,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:38:06,303 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:06,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2102794285, now seen corresponding path program 4 times [2024-06-04 15:38:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976821540] [2024-06-04 15:38:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:07,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976821540] [2024-06-04 15:38:07,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976821540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:07,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:07,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757056257] [2024-06-04 15:38:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:07,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:07,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:07,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 441 transitions, 7221 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:07,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:07,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:07,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:08,917 INFO L124 PetriNetUnfolderBase]: 4347/6720 cut-off events. [2024-06-04 15:38:08,917 INFO L125 PetriNetUnfolderBase]: For 500923/500925 co-relation queries the response was YES. [2024-06-04 15:38:08,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54707 conditions, 6720 events. 4347/6720 cut-off events. For 500923/500925 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38957 event pairs, 788 based on Foata normal form. 14/6729 useless extension candidates. Maximal degree in co-relation 54554. Up to 6007 conditions per place. [2024-06-04 15:38:09,012 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 142 changer transitions 0/475 dead transitions. [2024-06-04 15:38:09,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 475 transitions, 8299 flow [2024-06-04 15:38:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:38:09,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-04 15:38:09,013 INFO L175 Difference]: Start difference. First operand has 313 places, 441 transitions, 7221 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:38:09,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 475 transitions, 8299 flow [2024-06-04 15:38:10,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 475 transitions, 8145 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:10,638 INFO L231 Difference]: Finished difference. Result has 317 places, 442 transitions, 7376 flow [2024-06-04 15:38:10,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7067, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7376, PETRI_PLACES=317, PETRI_TRANSITIONS=442} [2024-06-04 15:38:10,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-04 15:38:10,639 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 442 transitions, 7376 flow [2024-06-04 15:38:10,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:10,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:10,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:38:10,640 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:10,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2062495079, now seen corresponding path program 5 times [2024-06-04 15:38:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:10,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934041791] [2024-06-04 15:38:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934041791] [2024-06-04 15:38:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934041791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501129493] [2024-06-04 15:38:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:11,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:11,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 442 transitions, 7376 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:11,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:11,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:11,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:13,320 INFO L124 PetriNetUnfolderBase]: 4327/6688 cut-off events. [2024-06-04 15:38:13,321 INFO L125 PetriNetUnfolderBase]: For 479114/479116 co-relation queries the response was YES. [2024-06-04 15:38:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54128 conditions, 6688 events. 4327/6688 cut-off events. For 479114/479116 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38694 event pairs, 827 based on Foata normal form. 14/6697 useless extension candidates. Maximal degree in co-relation 53974. Up to 5947 conditions per place. [2024-06-04 15:38:13,419 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 140 changer transitions 0/476 dead transitions. [2024-06-04 15:38:13,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 476 transitions, 8456 flow [2024-06-04 15:38:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:38:13,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-04 15:38:13,420 INFO L175 Difference]: Start difference. First operand has 317 places, 442 transitions, 7376 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:38:13,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 476 transitions, 8456 flow [2024-06-04 15:38:15,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 476 transitions, 8132 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:15,108 INFO L231 Difference]: Finished difference. Result has 320 places, 443 transitions, 7361 flow [2024-06-04 15:38:15,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7361, PETRI_PLACES=320, PETRI_TRANSITIONS=443} [2024-06-04 15:38:15,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-04 15:38:15,108 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 443 transitions, 7361 flow [2024-06-04 15:38:15,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:15,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:15,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:15,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:38:15,109 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:38:15,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2061654467, now seen corresponding path program 6 times [2024-06-04 15:38:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972489043] [2024-06-04 15:38:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:16,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:16,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972489043] [2024-06-04 15:38:16,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972489043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:16,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:16,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:38:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869281582] [2024-06-04 15:38:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:38:16,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:38:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:38:16,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:16,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 443 transitions, 7361 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:16,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:16,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:17,827 INFO L124 PetriNetUnfolderBase]: 4307/6656 cut-off events. [2024-06-04 15:38:17,827 INFO L125 PetriNetUnfolderBase]: For 464593/464595 co-relation queries the response was YES. [2024-06-04 15:38:17,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53092 conditions, 6656 events. 4307/6656 cut-off events. For 464593/464595 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38435 event pairs, 801 based on Foata normal form. 14/6665 useless extension candidates. Maximal degree in co-relation 52936. Up to 5866 conditions per place. [2024-06-04 15:38:17,922 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 144 changer transitions 0/475 dead transitions. [2024-06-04 15:38:17,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 475 transitions, 8297 flow [2024-06-04 15:38:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:38:17,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-04 15:38:17,923 INFO L175 Difference]: Start difference. First operand has 320 places, 443 transitions, 7361 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:38:17,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 475 transitions, 8297 flow [2024-06-04 15:38:19,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 475 transitions, 7998 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:19,578 INFO L231 Difference]: Finished difference. Result has 321 places, 442 transitions, 7230 flow [2024-06-04 15:38:19,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6938, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7230, PETRI_PLACES=321, PETRI_TRANSITIONS=442} [2024-06-04 15:38:19,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-04 15:38:19,579 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 442 transitions, 7230 flow [2024-06-04 15:38:19,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:38:19,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:19,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:19,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:38:19,580 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)] === [2024-06-04 15:38:19,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash 477227837, now seen corresponding path program 1 times [2024-06-04 15:38:19,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:19,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585373161] [2024-06-04 15:38:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:19,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585373161] [2024-06-04 15:38:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585373161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:20,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657125566] [2024-06-04 15:38:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:20,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:20,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:20,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:20,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 442 transitions, 7230 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:20,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:20,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:20,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:22,117 INFO L124 PetriNetUnfolderBase]: 4312/6664 cut-off events. [2024-06-04 15:38:22,118 INFO L125 PetriNetUnfolderBase]: For 453349/453349 co-relation queries the response was YES. [2024-06-04 15:38:22,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53275 conditions, 6664 events. 4312/6664 cut-off events. For 453349/453349 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38573 event pairs, 1057 based on Foata normal form. 1/6663 useless extension candidates. Maximal degree in co-relation 53118. Up to 6578 conditions per place. [2024-06-04 15:38:22,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 36 changer transitions 0/468 dead transitions. [2024-06-04 15:38:22,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 8484 flow [2024-06-04 15:38:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 15:38:22,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:38:22,229 INFO L175 Difference]: Start difference. First operand has 321 places, 442 transitions, 7230 flow. Second operand 8 states and 124 transitions. [2024-06-04 15:38:22,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 8484 flow [2024-06-04 15:38:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 468 transitions, 7933 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-04 15:38:24,167 INFO L231 Difference]: Finished difference. Result has 319 places, 448 transitions, 6879 flow [2024-06-04 15:38:24,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6879, PETRI_PLACES=319, PETRI_TRANSITIONS=448} [2024-06-04 15:38:24,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 15:38:24,168 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 448 transitions, 6879 flow [2024-06-04 15:38:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:24,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:24,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:38:24,168 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)] === [2024-06-04 15:38:24,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 477318202, now seen corresponding path program 1 times [2024-06-04 15:38:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547568426] [2024-06-04 15:38:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:24,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:24,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547568426] [2024-06-04 15:38:24,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547568426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:24,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783556225] [2024-06-04 15:38:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:24,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:24,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 448 transitions, 6879 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:24,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:24,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:24,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:26,549 INFO L124 PetriNetUnfolderBase]: 4376/6750 cut-off events. [2024-06-04 15:38:26,549 INFO L125 PetriNetUnfolderBase]: For 483727/483735 co-relation queries the response was YES. [2024-06-04 15:38:26,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53690 conditions, 6750 events. 4376/6750 cut-off events. For 483727/483735 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39042 event pairs, 963 based on Foata normal form. 12/6759 useless extension candidates. Maximal degree in co-relation 53535. Up to 6402 conditions per place. [2024-06-04 15:38:26,627 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 410 selfloop transitions, 70 changer transitions 0/483 dead transitions. [2024-06-04 15:38:26,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 483 transitions, 8593 flow [2024-06-04 15:38:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:38:26,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:38:26,628 INFO L175 Difference]: Start difference. First operand has 319 places, 448 transitions, 6879 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:38:26,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 483 transitions, 8593 flow [2024-06-04 15:38:28,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 483 transitions, 8492 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 15:38:28,099 INFO L231 Difference]: Finished difference. Result has 324 places, 459 transitions, 7265 flow [2024-06-04 15:38:28,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7265, PETRI_PLACES=324, PETRI_TRANSITIONS=459} [2024-06-04 15:38:28,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-04 15:38:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 459 transitions, 7265 flow [2024-06-04 15:38:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:28,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:28,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:28,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:38:28,101 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)] === [2024-06-04 15:38:28,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash -486395849, now seen corresponding path program 2 times [2024-06-04 15:38:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667774429] [2024-06-04 15:38:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667774429] [2024-06-04 15:38:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667774429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:28,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:28,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:28,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474715472] [2024-06-04 15:38:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:28,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:29,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:29,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 459 transitions, 7265 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:29,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:29,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:29,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:30,435 INFO L124 PetriNetUnfolderBase]: 4381/6760 cut-off events. [2024-06-04 15:38:30,435 INFO L125 PetriNetUnfolderBase]: For 481178/481178 co-relation queries the response was YES. [2024-06-04 15:38:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54426 conditions, 6760 events. 4381/6760 cut-off events. For 481178/481178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39100 event pairs, 1064 based on Foata normal form. 1/6759 useless extension candidates. Maximal degree in co-relation 54268. Up to 6691 conditions per place. [2024-06-04 15:38:30,524 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 444 selfloop transitions, 31 changer transitions 0/478 dead transitions. [2024-06-04 15:38:30,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 478 transitions, 8321 flow [2024-06-04 15:38:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 15:38:30,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-04 15:38:30,526 INFO L175 Difference]: Start difference. First operand has 324 places, 459 transitions, 7265 flow. Second operand 8 states and 119 transitions. [2024-06-04 15:38:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 478 transitions, 8321 flow [2024-06-04 15:38:32,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 478 transitions, 8109 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-04 15:38:32,277 INFO L231 Difference]: Finished difference. Result has 329 places, 462 transitions, 7181 flow [2024-06-04 15:38:32,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7181, PETRI_PLACES=329, PETRI_TRANSITIONS=462} [2024-06-04 15:38:32,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-04 15:38:32,278 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 462 transitions, 7181 flow [2024-06-04 15:38:32,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:32,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:32,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:32,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:38:32,279 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)] === [2024-06-04 15:38:32,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash 481042852, now seen corresponding path program 2 times [2024-06-04 15:38:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865884670] [2024-06-04 15:38:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:32,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:32,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865884670] [2024-06-04 15:38:32,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865884670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:32,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:32,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706627398] [2024-06-04 15:38:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:32,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:32,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 462 transitions, 7181 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:32,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:32,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:32,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:34,485 INFO L124 PetriNetUnfolderBase]: 4457/6862 cut-off events. [2024-06-04 15:38:34,485 INFO L125 PetriNetUnfolderBase]: For 516181/516189 co-relation queries the response was YES. [2024-06-04 15:38:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55666 conditions, 6862 events. 4457/6862 cut-off events. For 516181/516189 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39702 event pairs, 967 based on Foata normal form. 12/6871 useless extension candidates. Maximal degree in co-relation 55506. Up to 6604 conditions per place. [2024-06-04 15:38:34,582 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 429 selfloop transitions, 65 changer transitions 0/497 dead transitions. [2024-06-04 15:38:34,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 497 transitions, 8869 flow [2024-06-04 15:38:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:38:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:38:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-04 15:38:34,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-04 15:38:34,583 INFO L175 Difference]: Start difference. First operand has 329 places, 462 transitions, 7181 flow. Second operand 10 states and 156 transitions. [2024-06-04 15:38:34,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 497 transitions, 8869 flow [2024-06-04 15:38:36,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 497 transitions, 8769 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:36,379 INFO L231 Difference]: Finished difference. Result has 334 places, 474 transitions, 7539 flow [2024-06-04 15:38:36,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7081, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7539, PETRI_PLACES=334, PETRI_TRANSITIONS=474} [2024-06-04 15:38:36,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 15:38:36,380 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 474 transitions, 7539 flow [2024-06-04 15:38:36,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:36,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:36,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:38:36,380 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)] === [2024-06-04 15:38:36,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash 481037117, now seen corresponding path program 3 times [2024-06-04 15:38:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:36,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352532215] [2024-06-04 15:38:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352532215] [2024-06-04 15:38:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352532215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499554774] [2024-06-04 15:38:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:37,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:37,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:37,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:37,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 474 transitions, 7539 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:37,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:39,090 INFO L124 PetriNetUnfolderBase]: 4462/6872 cut-off events. [2024-06-04 15:38:39,091 INFO L125 PetriNetUnfolderBase]: For 523221/523221 co-relation queries the response was YES. [2024-06-04 15:38:39,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56272 conditions, 6872 events. 4462/6872 cut-off events. For 523221/523221 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39835 event pairs, 1076 based on Foata normal form. 1/6871 useless extension candidates. Maximal degree in co-relation 56110. Up to 6818 conditions per place. [2024-06-04 15:38:39,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 23 changer transitions 0/490 dead transitions. [2024-06-04 15:38:39,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 490 transitions, 8613 flow [2024-06-04 15:38:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-04 15:38:39,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-04 15:38:39,195 INFO L175 Difference]: Start difference. First operand has 334 places, 474 transitions, 7539 flow. Second operand 8 states and 115 transitions. [2024-06-04 15:38:39,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 490 transitions, 8613 flow [2024-06-04 15:38:40,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 490 transitions, 8423 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:40,993 INFO L231 Difference]: Finished difference. Result has 337 places, 477 transitions, 7467 flow [2024-06-04 15:38:40,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7349, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7467, PETRI_PLACES=337, PETRI_TRANSITIONS=477} [2024-06-04 15:38:40,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-04 15:38:40,994 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 477 transitions, 7467 flow [2024-06-04 15:38:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:40,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:40,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:38:40,995 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)] === [2024-06-04 15:38:40,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 481037272, now seen corresponding path program 3 times [2024-06-04 15:38:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:40,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563543354] [2024-06-04 15:38:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:41,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:41,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563543354] [2024-06-04 15:38:41,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563543354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:41,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:41,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:41,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496581142] [2024-06-04 15:38:41,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:41,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:41,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 477 transitions, 7467 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:41,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:41,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:41,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:43,213 INFO L124 PetriNetUnfolderBase]: 4454/6859 cut-off events. [2024-06-04 15:38:43,214 INFO L125 PetriNetUnfolderBase]: For 528982/528990 co-relation queries the response was YES. [2024-06-04 15:38:43,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55705 conditions, 6859 events. 4454/6859 cut-off events. For 528982/528990 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39680 event pairs, 967 based on Foata normal form. 12/6868 useless extension candidates. Maximal degree in co-relation 55541. Up to 6608 conditions per place. [2024-06-04 15:38:43,313 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 432 selfloop transitions, 60 changer transitions 0/495 dead transitions. [2024-06-04 15:38:43,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 495 transitions, 8683 flow [2024-06-04 15:38:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:38:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:38:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:38:43,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:38:43,315 INFO L175 Difference]: Start difference. First operand has 337 places, 477 transitions, 7467 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:38:43,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 495 transitions, 8683 flow [2024-06-04 15:38:45,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 495 transitions, 8535 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:45,245 INFO L231 Difference]: Finished difference. Result has 339 places, 477 transitions, 7447 flow [2024-06-04 15:38:45,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7319, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7447, PETRI_PLACES=339, PETRI_TRANSITIONS=477} [2024-06-04 15:38:45,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-04 15:38:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 477 transitions, 7447 flow [2024-06-04 15:38:45,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:45,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:45,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:38:45,246 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)] === [2024-06-04 15:38:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1063593210, now seen corresponding path program 4 times [2024-06-04 15:38:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362604349] [2024-06-04 15:38:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:45,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362604349] [2024-06-04 15:38:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362604349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:45,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475174783] [2024-06-04 15:38:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:46,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:46,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 477 transitions, 7447 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:46,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:46,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:46,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:47,683 INFO L124 PetriNetUnfolderBase]: 4506/6931 cut-off events. [2024-06-04 15:38:47,683 INFO L125 PetriNetUnfolderBase]: For 557107/557115 co-relation queries the response was YES. [2024-06-04 15:38:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56994 conditions, 6931 events. 4506/6931 cut-off events. For 557107/557115 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40111 event pairs, 990 based on Foata normal form. 12/6940 useless extension candidates. Maximal degree in co-relation 56829. Up to 6716 conditions per place. [2024-06-04 15:38:47,773 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 449 selfloop transitions, 50 changer transitions 0/502 dead transitions. [2024-06-04 15:38:47,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 9083 flow [2024-06-04 15:38:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:38:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:38:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-04 15:38:47,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-04 15:38:47,775 INFO L175 Difference]: Start difference. First operand has 339 places, 477 transitions, 7447 flow. Second operand 9 states and 133 transitions. [2024-06-04 15:38:47,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 9083 flow [2024-06-04 15:38:49,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 502 transitions, 8963 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:38:49,835 INFO L231 Difference]: Finished difference. Result has 343 places, 486 transitions, 7720 flow [2024-06-04 15:38:49,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7720, PETRI_PLACES=343, PETRI_TRANSITIONS=486} [2024-06-04 15:38:49,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-04 15:38:49,836 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 486 transitions, 7720 flow [2024-06-04 15:38:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:49,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:49,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:49,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:38:49,836 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)] === [2024-06-04 15:38:49,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2061671921, now seen corresponding path program 1 times [2024-06-04 15:38:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471950637] [2024-06-04 15:38:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:50,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:50,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471950637] [2024-06-04 15:38:50,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471950637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:50,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:50,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:50,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002906592] [2024-06-04 15:38:50,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:50,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:50,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 486 transitions, 7720 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:50,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:50,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:50,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:52,795 INFO L124 PetriNetUnfolderBase]: 4500/6923 cut-off events. [2024-06-04 15:38:52,796 INFO L125 PetriNetUnfolderBase]: For 560711/560719 co-relation queries the response was YES. [2024-06-04 15:38:52,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57221 conditions, 6923 events. 4500/6923 cut-off events. For 560711/560719 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40092 event pairs, 993 based on Foata normal form. 10/6930 useless extension candidates. Maximal degree in co-relation 57053. Up to 6824 conditions per place. [2024-06-04 15:38:52,899 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 462 selfloop transitions, 33 changer transitions 0/498 dead transitions. [2024-06-04 15:38:52,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 8806 flow [2024-06-04 15:38:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:38:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:38:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 15:38:52,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:38:52,901 INFO L175 Difference]: Start difference. First operand has 343 places, 486 transitions, 7720 flow. Second operand 6 states and 96 transitions. [2024-06-04 15:38:52,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 8806 flow [2024-06-04 15:38:54,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 8568 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-04 15:38:54,791 INFO L231 Difference]: Finished difference. Result has 343 places, 489 transitions, 7628 flow [2024-06-04 15:38:54,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7628, PETRI_PLACES=343, PETRI_TRANSITIONS=489} [2024-06-04 15:38:54,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-04 15:38:54,792 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 489 transitions, 7628 flow [2024-06-04 15:38:54,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:54,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:54,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:54,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:38:54,793 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)] === [2024-06-04 15:38:54,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:54,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1056241560, now seen corresponding path program 5 times [2024-06-04 15:38:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:54,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76354052] [2024-06-04 15:38:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:38:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:38:55,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:38:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76354052] [2024-06-04 15:38:55,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76354052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:38:55,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:38:55,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:38:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558622096] [2024-06-04 15:38:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:38:55,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:38:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:38:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:38:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:38:55,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:38:55,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 489 transitions, 7628 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:55,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:38:55,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:38:55,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:38:57,249 INFO L124 PetriNetUnfolderBase]: 4504/6930 cut-off events. [2024-06-04 15:38:57,250 INFO L125 PetriNetUnfolderBase]: For 571012/571020 co-relation queries the response was YES. [2024-06-04 15:38:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56770 conditions, 6930 events. 4504/6930 cut-off events. For 571012/571020 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40153 event pairs, 969 based on Foata normal form. 12/6938 useless extension candidates. Maximal degree in co-relation 56604. Up to 6831 conditions per place. [2024-06-04 15:38:57,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 473 selfloop transitions, 28 changer transitions 0/504 dead transitions. [2024-06-04 15:38:57,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 504 transitions, 8778 flow [2024-06-04 15:38:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:38:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:38:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-04 15:38:57,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-04 15:38:57,361 INFO L175 Difference]: Start difference. First operand has 343 places, 489 transitions, 7628 flow. Second operand 7 states and 107 transitions. [2024-06-04 15:38:57,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 504 transitions, 8778 flow [2024-06-04 15:38:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 504 transitions, 8665 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 15:38:59,591 INFO L231 Difference]: Finished difference. Result has 345 places, 493 transitions, 7688 flow [2024-06-04 15:38:59,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7688, PETRI_PLACES=345, PETRI_TRANSITIONS=493} [2024-06-04 15:38:59,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-04 15:38:59,592 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 493 transitions, 7688 flow [2024-06-04 15:38:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:38:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:38:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:38:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:38:59,593 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)] === [2024-06-04 15:38:59,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:38:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598945, now seen corresponding path program 4 times [2024-06-04 15:38:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:38:59,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427916094] [2024-06-04 15:38:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:38:59,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:38:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427916094] [2024-06-04 15:39:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427916094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857759338] [2024-06-04 15:39:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:00,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:00,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:00,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:00,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 493 transitions, 7688 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:00,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:00,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:00,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:02,194 INFO L124 PetriNetUnfolderBase]: 4501/6928 cut-off events. [2024-06-04 15:39:02,195 INFO L125 PetriNetUnfolderBase]: For 559880/559880 co-relation queries the response was YES. [2024-06-04 15:39:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56672 conditions, 6928 events. 4501/6928 cut-off events. For 559880/559880 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40206 event pairs, 1056 based on Foata normal form. 1/6927 useless extension candidates. Maximal degree in co-relation 56506. Up to 6859 conditions per place. [2024-06-04 15:39:02,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 26 changer transitions 0/511 dead transitions. [2024-06-04 15:39:02,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 511 transitions, 8766 flow [2024-06-04 15:39:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:39:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:39:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:39:02,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:39:02,299 INFO L175 Difference]: Start difference. First operand has 345 places, 493 transitions, 7688 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:39:02,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 511 transitions, 8766 flow [2024-06-04 15:39:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 511 transitions, 8595 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:04,268 INFO L231 Difference]: Finished difference. Result has 347 places, 493 transitions, 7579 flow [2024-06-04 15:39:04,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7517, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7579, PETRI_PLACES=347, PETRI_TRANSITIONS=493} [2024-06-04 15:39:04,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-04 15:39:04,269 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 493 transitions, 7579 flow [2024-06-04 15:39:04,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:04,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:04,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:39:04,270 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)] === [2024-06-04 15:39:04,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598790, now seen corresponding path program 6 times [2024-06-04 15:39:04,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:04,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659262140] [2024-06-04 15:39:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:04,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:04,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659262140] [2024-06-04 15:39:04,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659262140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:04,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:04,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066270301] [2024-06-04 15:39:04,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:05,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 493 transitions, 7579 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:05,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:05,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:05,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:06,667 INFO L124 PetriNetUnfolderBase]: 4493/6915 cut-off events. [2024-06-04 15:39:06,667 INFO L125 PetriNetUnfolderBase]: For 564973/564981 co-relation queries the response was YES. [2024-06-04 15:39:06,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 6915 events. 4493/6915 cut-off events. For 564973/564981 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40057 event pairs, 965 based on Foata normal form. 12/6924 useless extension candidates. Maximal degree in co-relation 55992. Up to 6637 conditions per place. [2024-06-04 15:39:06,776 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 444 selfloop transitions, 65 changer transitions 0/512 dead transitions. [2024-06-04 15:39:06,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 512 transitions, 8837 flow [2024-06-04 15:39:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:39:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:39:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 15:39:06,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:39:06,777 INFO L175 Difference]: Start difference. First operand has 347 places, 493 transitions, 7579 flow. Second operand 7 states and 119 transitions. [2024-06-04 15:39:06,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 512 transitions, 8837 flow [2024-06-04 15:39:09,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 512 transitions, 8707 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 15:39:09,279 INFO L231 Difference]: Finished difference. Result has 348 places, 493 transitions, 7587 flow [2024-06-04 15:39:09,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7587, PETRI_PLACES=348, PETRI_TRANSITIONS=493} [2024-06-04 15:39:09,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-04 15:39:09,280 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 493 transitions, 7587 flow [2024-06-04 15:39:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:09,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:09,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:09,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:39:09,281 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)] === [2024-06-04 15:39:09,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash 268414877, now seen corresponding path program 1 times [2024-06-04 15:39:09,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:09,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233015770] [2024-06-04 15:39:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:09,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233015770] [2024-06-04 15:39:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233015770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:09,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577347888] [2024-06-04 15:39:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:09,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:09,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:09,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:09,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:09,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 493 transitions, 7587 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:09,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:09,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:09,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:11,715 INFO L124 PetriNetUnfolderBase]: 4530/6965 cut-off events. [2024-06-04 15:39:11,716 INFO L125 PetriNetUnfolderBase]: For 583536/583540 co-relation queries the response was YES. [2024-06-04 15:39:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57329 conditions, 6965 events. 4530/6965 cut-off events. For 583536/583540 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40299 event pairs, 968 based on Foata normal form. 5/6968 useless extension candidates. Maximal degree in co-relation 57161. Up to 6836 conditions per place. [2024-06-04 15:39:11,819 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 480 selfloop transitions, 44 changer transitions 0/527 dead transitions. [2024-06-04 15:39:11,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 527 transitions, 9192 flow [2024-06-04 15:39:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:39:11,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:39:11,821 INFO L175 Difference]: Start difference. First operand has 348 places, 493 transitions, 7587 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:39:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 527 transitions, 9192 flow [2024-06-04 15:39:13,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 527 transitions, 9016 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:13,961 INFO L231 Difference]: Finished difference. Result has 352 places, 503 transitions, 7843 flow [2024-06-04 15:39:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7843, PETRI_PLACES=352, PETRI_TRANSITIONS=503} [2024-06-04 15:39:13,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-04 15:39:13,962 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 503 transitions, 7843 flow [2024-06-04 15:39:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:13,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:13,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:13,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:39:13,962 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)] === [2024-06-04 15:39:13,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925825, now seen corresponding path program 2 times [2024-06-04 15:39:13,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131741175] [2024-06-04 15:39:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:14,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131741175] [2024-06-04 15:39:14,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131741175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:14,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:14,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611294306] [2024-06-04 15:39:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:14,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:14,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 503 transitions, 7843 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:14,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:14,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:14,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:16,474 INFO L124 PetriNetUnfolderBase]: 4527/6961 cut-off events. [2024-06-04 15:39:16,474 INFO L125 PetriNetUnfolderBase]: For 593283/593287 co-relation queries the response was YES. [2024-06-04 15:39:16,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 6961 events. 4527/6961 cut-off events. For 593283/593287 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40238 event pairs, 989 based on Foata normal form. 5/6964 useless extension candidates. Maximal degree in co-relation 57066. Up to 6860 conditions per place. [2024-06-04 15:39:16,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 484 selfloop transitions, 35 changer transitions 0/522 dead transitions. [2024-06-04 15:39:16,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 522 transitions, 8949 flow [2024-06-04 15:39:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:39:16,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:39:16,573 INFO L175 Difference]: Start difference. First operand has 352 places, 503 transitions, 7843 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:39:16,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 522 transitions, 8949 flow [2024-06-04 15:39:19,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 522 transitions, 8794 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:19,101 INFO L231 Difference]: Finished difference. Result has 355 places, 503 transitions, 7764 flow [2024-06-04 15:39:19,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7764, PETRI_PLACES=355, PETRI_TRANSITIONS=503} [2024-06-04 15:39:19,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-04 15:39:19,102 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 503 transitions, 7764 flow [2024-06-04 15:39:19,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:19,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:19,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:19,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:39:19,102 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)] === [2024-06-04 15:39:19,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash -206006213, now seen corresponding path program 3 times [2024-06-04 15:39:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403944244] [2024-06-04 15:39:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403944244] [2024-06-04 15:39:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403944244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:19,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634620072] [2024-06-04 15:39:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:19,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:19,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 503 transitions, 7764 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:19,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:19,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:21,499 INFO L124 PetriNetUnfolderBase]: 4542/6982 cut-off events. [2024-06-04 15:39:21,500 INFO L125 PetriNetUnfolderBase]: For 605798/605802 co-relation queries the response was YES. [2024-06-04 15:39:21,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57528 conditions, 6982 events. 4542/6982 cut-off events. For 605798/605802 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40364 event pairs, 993 based on Foata normal form. 5/6985 useless extension candidates. Maximal degree in co-relation 57357. Up to 6904 conditions per place. [2024-06-04 15:39:21,591 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 34 changer transitions 0/527 dead transitions. [2024-06-04 15:39:21,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 527 transitions, 9065 flow [2024-06-04 15:39:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 15:39:21,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-04 15:39:21,592 INFO L175 Difference]: Start difference. First operand has 355 places, 503 transitions, 7764 flow. Second operand 8 states and 121 transitions. [2024-06-04 15:39:21,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 527 transitions, 9065 flow [2024-06-04 15:39:23,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 527 transitions, 8923 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:23,967 INFO L231 Difference]: Finished difference. Result has 359 places, 512 transitions, 7919 flow [2024-06-04 15:39:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7634, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7919, PETRI_PLACES=359, PETRI_TRANSITIONS=512} [2024-06-04 15:39:23,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-04 15:39:23,968 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 512 transitions, 7919 flow [2024-06-04 15:39:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:23,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:23,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:39:23,968 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)] === [2024-06-04 15:39:23,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1900521531, now seen corresponding path program 4 times [2024-06-04 15:39:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:23,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740162216] [2024-06-04 15:39:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740162216] [2024-06-04 15:39:24,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740162216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:24,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:24,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309690981] [2024-06-04 15:39:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:24,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:24,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:24,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 512 transitions, 7919 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:24,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:24,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:24,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:26,538 INFO L124 PetriNetUnfolderBase]: 4603/7067 cut-off events. [2024-06-04 15:39:26,538 INFO L125 PetriNetUnfolderBase]: For 647583/647591 co-relation queries the response was YES. [2024-06-04 15:39:26,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59315 conditions, 7067 events. 4603/7067 cut-off events. For 647583/647591 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40923 event pairs, 947 based on Foata normal form. 9/7073 useless extension candidates. Maximal degree in co-relation 59142. Up to 6595 conditions per place. [2024-06-04 15:39:26,636 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 119 changer transitions 0/550 dead transitions. [2024-06-04 15:39:26,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 550 transitions, 9854 flow [2024-06-04 15:39:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:39:26,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-04 15:39:26,637 INFO L175 Difference]: Start difference. First operand has 359 places, 512 transitions, 7919 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:39:26,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 550 transitions, 9854 flow [2024-06-04 15:39:29,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 550 transitions, 9726 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:29,302 INFO L231 Difference]: Finished difference. Result has 364 places, 526 transitions, 8477 flow [2024-06-04 15:39:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7791, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8477, PETRI_PLACES=364, PETRI_TRANSITIONS=526} [2024-06-04 15:39:29,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-04 15:39:29,303 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 526 transitions, 8477 flow [2024-06-04 15:39:29,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:29,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:29,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:39:29,303 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)] === [2024-06-04 15:39:29,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1911949371, now seen corresponding path program 5 times [2024-06-04 15:39:29,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:29,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487067036] [2024-06-04 15:39:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:30,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487067036] [2024-06-04 15:39:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487067036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:30,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:30,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526837119] [2024-06-04 15:39:30,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:30,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:30,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 526 transitions, 8477 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:30,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:30,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:30,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:31,726 INFO L124 PetriNetUnfolderBase]: 4594/7056 cut-off events. [2024-06-04 15:39:31,726 INFO L125 PetriNetUnfolderBase]: For 658599/658607 co-relation queries the response was YES. [2024-06-04 15:39:31,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59565 conditions, 7056 events. 4594/7056 cut-off events. For 658599/658607 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40864 event pairs, 947 based on Foata normal form. 11/7063 useless extension candidates. Maximal degree in co-relation 59390. Up to 6588 conditions per place. [2024-06-04 15:39:31,823 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 111 changer transitions 0/548 dead transitions. [2024-06-04 15:39:31,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 548 transitions, 9999 flow [2024-06-04 15:39:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:39:31,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-04 15:39:31,824 INFO L175 Difference]: Start difference. First operand has 364 places, 526 transitions, 8477 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:39:31,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 548 transitions, 9999 flow [2024-06-04 15:39:34,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 548 transitions, 9750 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-04 15:39:34,291 INFO L231 Difference]: Finished difference. Result has 368 places, 526 transitions, 8458 flow [2024-06-04 15:39:34,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8228, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8458, PETRI_PLACES=368, PETRI_TRANSITIONS=526} [2024-06-04 15:39:34,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-04 15:39:34,291 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 526 transitions, 8458 flow [2024-06-04 15:39:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:34,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:34,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:39:34,292 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)] === [2024-06-04 15:39:34,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1862260677, now seen corresponding path program 6 times [2024-06-04 15:39:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:34,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096233053] [2024-06-04 15:39:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:35,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:35,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096233053] [2024-06-04 15:39:35,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096233053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:35,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:35,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:35,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348344698] [2024-06-04 15:39:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:35,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:35,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:35,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 526 transitions, 8458 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:35,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:35,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:35,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:36,765 INFO L124 PetriNetUnfolderBase]: 4587/7046 cut-off events. [2024-06-04 15:39:36,765 INFO L125 PetriNetUnfolderBase]: For 661477/661485 co-relation queries the response was YES. [2024-06-04 15:39:36,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59495 conditions, 7046 events. 4587/7046 cut-off events. For 661477/661485 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40725 event pairs, 972 based on Foata normal form. 9/7051 useless extension candidates. Maximal degree in co-relation 59319. Up to 6581 conditions per place. [2024-06-04 15:39:36,862 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 120 changer transitions 0/551 dead transitions. [2024-06-04 15:39:36,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 551 transitions, 10164 flow [2024-06-04 15:39:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:39:36,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:39:36,864 INFO L175 Difference]: Start difference. First operand has 368 places, 526 transitions, 8458 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:39:36,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 551 transitions, 10164 flow [2024-06-04 15:39:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 551 transitions, 9823 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:39,092 INFO L231 Difference]: Finished difference. Result has 371 places, 526 transitions, 8363 flow [2024-06-04 15:39:39,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8117, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8363, PETRI_PLACES=371, PETRI_TRANSITIONS=526} [2024-06-04 15:39:39,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-04 15:39:39,093 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 526 transitions, 8363 flow [2024-06-04 15:39:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:39,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:39:39,094 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)] === [2024-06-04 15:39:39,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:39,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380647, now seen corresponding path program 7 times [2024-06-04 15:39:39,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:39,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110208405] [2024-06-04 15:39:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:39,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110208405] [2024-06-04 15:39:39,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110208405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:39,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:39,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:39,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480573170] [2024-06-04 15:39:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:39,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:39,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 526 transitions, 8363 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:39,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:39,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:39,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:41,612 INFO L124 PetriNetUnfolderBase]: 4597/7060 cut-off events. [2024-06-04 15:39:41,612 INFO L125 PetriNetUnfolderBase]: For 674163/674171 co-relation queries the response was YES. [2024-06-04 15:39:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59640 conditions, 7060 events. 4597/7060 cut-off events. For 674163/674171 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40903 event pairs, 959 based on Foata normal form. 9/7065 useless extension candidates. Maximal degree in co-relation 59463. Up to 6854 conditions per place. [2024-06-04 15:39:41,716 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 484 selfloop transitions, 63 changer transitions 0/550 dead transitions. [2024-06-04 15:39:41,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 550 transitions, 9678 flow [2024-06-04 15:39:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:39:41,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:39:41,725 INFO L175 Difference]: Start difference. First operand has 371 places, 526 transitions, 8363 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:39:41,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 550 transitions, 9678 flow [2024-06-04 15:39:44,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 550 transitions, 9238 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-04 15:39:44,254 INFO L231 Difference]: Finished difference. Result has 369 places, 532 transitions, 8210 flow [2024-06-04 15:39:44,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8210, PETRI_PLACES=369, PETRI_TRANSITIONS=532} [2024-06-04 15:39:44,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-04 15:39:44,255 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 532 transitions, 8210 flow [2024-06-04 15:39:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:44,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:44,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:44,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:39:44,255 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)] === [2024-06-04 15:39:44,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2078086459, now seen corresponding path program 8 times [2024-06-04 15:39:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:44,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640267494] [2024-06-04 15:39:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:44,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640267494] [2024-06-04 15:39:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640267494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:44,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522044253] [2024-06-04 15:39:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:44,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:44,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:45,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:45,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 532 transitions, 8210 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:45,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:45,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:45,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:46,739 INFO L124 PetriNetUnfolderBase]: 4588/7048 cut-off events. [2024-06-04 15:39:46,739 INFO L125 PetriNetUnfolderBase]: For 682732/682740 co-relation queries the response was YES. [2024-06-04 15:39:46,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58843 conditions, 7048 events. 4588/7048 cut-off events. For 682732/682740 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40814 event pairs, 963 based on Foata normal form. 11/7055 useless extension candidates. Maximal degree in co-relation 58667. Up to 6770 conditions per place. [2024-06-04 15:39:46,839 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 473 selfloop transitions, 74 changer transitions 0/550 dead transitions. [2024-06-04 15:39:46,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 550 transitions, 9560 flow [2024-06-04 15:39:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:39:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:39:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:39:46,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-04 15:39:46,841 INFO L175 Difference]: Start difference. First operand has 369 places, 532 transitions, 8210 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:39:46,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 550 transitions, 9560 flow [2024-06-04 15:39:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 550 transitions, 9374 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:50,232 INFO L231 Difference]: Finished difference. Result has 372 places, 532 transitions, 8181 flow [2024-06-04 15:39:50,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8024, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8181, PETRI_PLACES=372, PETRI_TRANSITIONS=532} [2024-06-04 15:39:50,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-04 15:39:50,232 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 532 transitions, 8181 flow [2024-06-04 15:39:50,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:50,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:50,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:50,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:39:50,233 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)] === [2024-06-04 15:39:50,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1682917341, now seen corresponding path program 9 times [2024-06-04 15:39:50,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:50,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950032143] [2024-06-04 15:39:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:50,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:50,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:50,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950032143] [2024-06-04 15:39:50,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950032143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:50,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:50,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:50,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659057024] [2024-06-04 15:39:50,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:50,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:51,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 532 transitions, 8181 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:52,667 INFO L124 PetriNetUnfolderBase]: 4575/7030 cut-off events. [2024-06-04 15:39:52,667 INFO L125 PetriNetUnfolderBase]: For 684975/684983 co-relation queries the response was YES. [2024-06-04 15:39:52,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58586 conditions, 7030 events. 4575/7030 cut-off events. For 684975/684983 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40663 event pairs, 961 based on Foata normal form. 11/7037 useless extension candidates. Maximal degree in co-relation 58409. Up to 6758 conditions per place. [2024-06-04 15:39:52,768 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 472 selfloop transitions, 78 changer transitions 0/553 dead transitions. [2024-06-04 15:39:52,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 553 transitions, 9385 flow [2024-06-04 15:39:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:39:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:39:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-04 15:39:52,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-04 15:39:52,770 INFO L175 Difference]: Start difference. First operand has 372 places, 532 transitions, 8181 flow. Second operand 10 states and 154 transitions. [2024-06-04 15:39:52,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 553 transitions, 9385 flow [2024-06-04 15:39:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 553 transitions, 9127 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-04 15:39:55,681 INFO L231 Difference]: Finished difference. Result has 377 places, 532 transitions, 8086 flow [2024-06-04 15:39:55,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7923, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8086, PETRI_PLACES=377, PETRI_TRANSITIONS=532} [2024-06-04 15:39:55,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-04 15:39:55,682 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 532 transitions, 8086 flow [2024-06-04 15:39:55,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:55,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:39:55,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:39:55,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:39:55,683 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)] === [2024-06-04 15:39:55,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:39:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash -390440769, now seen corresponding path program 10 times [2024-06-04 15:39:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:39:55,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795748110] [2024-06-04 15:39:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:39:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:39:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:39:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:39:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:39:56,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795748110] [2024-06-04 15:39:56,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795748110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:39:56,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:39:56,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:39:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019742378] [2024-06-04 15:39:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:39:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:39:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:39:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:39:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:39:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:39:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 532 transitions, 8086 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:39:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:39:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:39:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:39:58,225 INFO L124 PetriNetUnfolderBase]: 4566/7016 cut-off events. [2024-06-04 15:39:58,225 INFO L125 PetriNetUnfolderBase]: For 684462/684466 co-relation queries the response was YES. [2024-06-04 15:39:58,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58102 conditions, 7016 events. 4566/7016 cut-off events. For 684462/684466 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40597 event pairs, 991 based on Foata normal form. 7/7021 useless extension candidates. Maximal degree in co-relation 57924. Up to 6892 conditions per place. [2024-06-04 15:39:58,344 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 45 changer transitions 0/554 dead transitions. [2024-06-04 15:39:58,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 554 transitions, 9276 flow [2024-06-04 15:39:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:39:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:39:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:39:58,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-04 15:39:58,345 INFO L175 Difference]: Start difference. First operand has 377 places, 532 transitions, 8086 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:39:58,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 554 transitions, 9276 flow [2024-06-04 15:40:01,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 554 transitions, 8992 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-04 15:40:01,454 INFO L231 Difference]: Finished difference. Result has 374 places, 532 transitions, 7907 flow [2024-06-04 15:40:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7802, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7907, PETRI_PLACES=374, PETRI_TRANSITIONS=532} [2024-06-04 15:40:01,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-04 15:40:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 532 transitions, 7907 flow [2024-06-04 15:40:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:40:01,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:01,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:40:01,455 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)] === [2024-06-04 15:40:01,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1387925725, now seen corresponding path program 11 times [2024-06-04 15:40:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916808194] [2024-06-04 15:40:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:02,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:02,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916808194] [2024-06-04 15:40:02,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916808194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:02,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:02,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279268738] [2024-06-04 15:40:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:02,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:02,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 532 transitions, 7907 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:40:02,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:02,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:03,824 INFO L124 PetriNetUnfolderBase]: 4557/7006 cut-off events. [2024-06-04 15:40:03,824 INFO L125 PetriNetUnfolderBase]: For 685684/685692 co-relation queries the response was YES. [2024-06-04 15:40:03,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57548 conditions, 7006 events. 4557/7006 cut-off events. For 685684/685692 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40528 event pairs, 993 based on Foata normal form. 11/7013 useless extension candidates. Maximal degree in co-relation 57369. Up to 6700 conditions per place. [2024-06-04 15:40:03,927 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 472 selfloop transitions, 79 changer transitions 0/554 dead transitions. [2024-06-04 15:40:03,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 554 transitions, 9283 flow [2024-06-04 15:40:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:40:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:40:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:40:03,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-04 15:40:03,929 INFO L175 Difference]: Start difference. First operand has 374 places, 532 transitions, 7907 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:40:03,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 554 transitions, 9283 flow [2024-06-04 15:40:06,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 554 transitions, 9109 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:06,278 INFO L231 Difference]: Finished difference. Result has 375 places, 532 transitions, 7904 flow [2024-06-04 15:40:06,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7904, PETRI_PLACES=375, PETRI_TRANSITIONS=532} [2024-06-04 15:40:06,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-04 15:40:06,279 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 532 transitions, 7904 flow [2024-06-04 15:40:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:40:06,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:06,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:06,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:40:06,280 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)] === [2024-06-04 15:40:06,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -385792629, now seen corresponding path program 12 times [2024-06-04 15:40:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704204351] [2024-06-04 15:40:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:07,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:07,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704204351] [2024-06-04 15:40:07,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704204351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:07,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:07,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:40:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969239684] [2024-06-04 15:40:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:07,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:40:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:40:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:40:07,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:07,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 532 transitions, 7904 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:40:07,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:07,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:07,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:08,723 INFO L124 PetriNetUnfolderBase]: 4544/6988 cut-off events. [2024-06-04 15:40:08,724 INFO L125 PetriNetUnfolderBase]: For 672812/672820 co-relation queries the response was YES. [2024-06-04 15:40:08,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57139 conditions, 6988 events. 4544/6988 cut-off events. For 672812/672820 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40477 event pairs, 985 based on Foata normal form. 11/6995 useless extension candidates. Maximal degree in co-relation 56959. Up to 6688 conditions per place. [2024-06-04 15:40:08,843 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 80 changer transitions 0/553 dead transitions. [2024-06-04 15:40:08,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 553 transitions, 9096 flow [2024-06-04 15:40:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:40:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:40:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:40:08,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-04 15:40:08,844 INFO L175 Difference]: Start difference. First operand has 375 places, 532 transitions, 7904 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:40:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 553 transitions, 9096 flow [2024-06-04 15:40:11,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 553 transitions, 8866 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 15:40:11,697 INFO L231 Difference]: Finished difference. Result has 376 places, 532 transitions, 7848 flow [2024-06-04 15:40:11,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7848, PETRI_PLACES=376, PETRI_TRANSITIONS=532} [2024-06-04 15:40:11,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 15:40:11,706 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 532 transitions, 7848 flow [2024-06-04 15:40:11,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-04 15:40:11,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:11,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:11,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:40:11,706 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)] === [2024-06-04 15:40:11,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1222658959, now seen corresponding path program 1 times [2024-06-04 15:40:11,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:11,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849361069] [2024-06-04 15:40:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:11,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:12,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:12,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849361069] [2024-06-04 15:40:12,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849361069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:12,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:12,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273057434] [2024-06-04 15:40:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:12,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:12,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:12,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 532 transitions, 7848 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:12,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:12,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:12,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:14,365 INFO L124 PetriNetUnfolderBase]: 4552/6998 cut-off events. [2024-06-04 15:40:14,366 INFO L125 PetriNetUnfolderBase]: For 666955/666959 co-relation queries the response was YES. [2024-06-04 15:40:14,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57128 conditions, 6998 events. 4552/6998 cut-off events. For 666955/666959 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40519 event pairs, 973 based on Foata normal form. 6/7002 useless extension candidates. Maximal degree in co-relation 56948. Up to 6909 conditions per place. [2024-06-04 15:40:14,470 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 513 selfloop transitions, 32 changer transitions 0/548 dead transitions. [2024-06-04 15:40:14,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 548 transitions, 9028 flow [2024-06-04 15:40:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:40:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:40:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-04 15:40:14,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-04 15:40:14,471 INFO L175 Difference]: Start difference. First operand has 376 places, 532 transitions, 7848 flow. Second operand 6 states and 101 transitions. [2024-06-04 15:40:14,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 548 transitions, 9028 flow [2024-06-04 15:40:17,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 548 transitions, 8805 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 15:40:17,335 INFO L231 Difference]: Finished difference. Result has 374 places, 534 transitions, 7744 flow [2024-06-04 15:40:17,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7744, PETRI_PLACES=374, PETRI_TRANSITIONS=534} [2024-06-04 15:40:17,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-04 15:40:17,336 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 534 transitions, 7744 flow [2024-06-04 15:40:17,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:17,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:17,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:17,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:40:17,336 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)] === [2024-06-04 15:40:17,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1624822579, now seen corresponding path program 2 times [2024-06-04 15:40:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:17,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151408091] [2024-06-04 15:40:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:18,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:18,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151408091] [2024-06-04 15:40:18,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151408091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:18,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:18,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611398811] [2024-06-04 15:40:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:18,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:18,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 534 transitions, 7744 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:18,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:18,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:18,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:19,952 INFO L124 PetriNetUnfolderBase]: 4547/6992 cut-off events. [2024-06-04 15:40:19,952 INFO L125 PetriNetUnfolderBase]: For 660184/660192 co-relation queries the response was YES. [2024-06-04 15:40:20,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56705 conditions, 6992 events. 4547/6992 cut-off events. For 660184/660192 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40482 event pairs, 979 based on Foata normal form. 10/6999 useless extension candidates. Maximal degree in co-relation 56525. Up to 6882 conditions per place. [2024-06-04 15:40:20,061 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 513 selfloop transitions, 30 changer transitions 0/546 dead transitions. [2024-06-04 15:40:20,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 546 transitions, 8908 flow [2024-06-04 15:40:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:40:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:40:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-04 15:40:20,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-04 15:40:20,064 INFO L175 Difference]: Start difference. First operand has 374 places, 534 transitions, 7744 flow. Second operand 6 states and 93 transitions. [2024-06-04 15:40:20,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 546 transitions, 8908 flow [2024-06-04 15:40:23,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 546 transitions, 8805 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:40:23,146 INFO L231 Difference]: Finished difference. Result has 376 places, 536 transitions, 7760 flow [2024-06-04 15:40:23,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7760, PETRI_PLACES=376, PETRI_TRANSITIONS=536} [2024-06-04 15:40:23,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 15:40:23,147 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 536 transitions, 7760 flow [2024-06-04 15:40:23,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:23,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:23,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:23,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:40:23,147 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)] === [2024-06-04 15:40:23,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:23,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1909101339, now seen corresponding path program 1 times [2024-06-04 15:40:23,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:23,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866282953] [2024-06-04 15:40:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866282953] [2024-06-04 15:40:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866282953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:24,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:24,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:24,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558239133] [2024-06-04 15:40:24,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:24,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:24,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 536 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:24,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:24,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:24,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:26,156 INFO L124 PetriNetUnfolderBase]: 4555/7007 cut-off events. [2024-06-04 15:40:26,156 INFO L125 PetriNetUnfolderBase]: For 675293/675293 co-relation queries the response was YES. [2024-06-04 15:40:26,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57046 conditions, 7007 events. 4555/7007 cut-off events. For 675293/675293 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40653 event pairs, 1011 based on Foata normal form. 2/7007 useless extension candidates. Maximal degree in co-relation 56865. Up to 6879 conditions per place. [2024-06-04 15:40:26,271 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 47 changer transitions 0/566 dead transitions. [2024-06-04 15:40:26,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 566 transitions, 9296 flow [2024-06-04 15:40:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-04 15:40:26,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-04 15:40:26,273 INFO L175 Difference]: Start difference. First operand has 376 places, 536 transitions, 7760 flow. Second operand 9 states and 139 transitions. [2024-06-04 15:40:26,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 566 transitions, 9296 flow [2024-06-04 15:40:29,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 566 transitions, 9193 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 15:40:29,359 INFO L231 Difference]: Finished difference. Result has 381 places, 540 transitions, 7904 flow [2024-06-04 15:40:29,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7657, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7904, PETRI_PLACES=381, PETRI_TRANSITIONS=540} [2024-06-04 15:40:29,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-04 15:40:29,359 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 540 transitions, 7904 flow [2024-06-04 15:40:29,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:29,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:29,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:29,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:40:29,360 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)] === [2024-06-04 15:40:29,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2098802085, now seen corresponding path program 2 times [2024-06-04 15:40:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:29,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248180705] [2024-06-04 15:40:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:29,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248180705] [2024-06-04 15:40:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248180705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025406575] [2024-06-04 15:40:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:30,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:30,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 540 transitions, 7904 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:30,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:30,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:30,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:31,859 INFO L124 PetriNetUnfolderBase]: 4563/7019 cut-off events. [2024-06-04 15:40:31,859 INFO L125 PetriNetUnfolderBase]: For 690554/690554 co-relation queries the response was YES. [2024-06-04 15:40:31,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57426 conditions, 7019 events. 4563/7019 cut-off events. For 690554/690554 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40720 event pairs, 1050 based on Foata normal form. 2/7019 useless extension candidates. Maximal degree in co-relation 57244. Up to 6926 conditions per place. [2024-06-04 15:40:31,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 44 changer transitions 0/563 dead transitions. [2024-06-04 15:40:31,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 563 transitions, 9168 flow [2024-06-04 15:40:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-04 15:40:31,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-04 15:40:31,967 INFO L175 Difference]: Start difference. First operand has 381 places, 540 transitions, 7904 flow. Second operand 9 states and 134 transitions. [2024-06-04 15:40:31,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 563 transitions, 9168 flow [2024-06-04 15:40:35,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 563 transitions, 9001 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:35,508 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 7910 flow [2024-06-04 15:40:35,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7910, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-04 15:40:35,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-04 15:40:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 7910 flow [2024-06-04 15:40:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:35,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:40:35,510 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)] === [2024-06-04 15:40:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2098802209, now seen corresponding path program 1 times [2024-06-04 15:40:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825074909] [2024-06-04 15:40:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:36,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825074909] [2024-06-04 15:40:36,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825074909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:36,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11746354] [2024-06-04 15:40:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:36,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:36,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:36,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 7910 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:36,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:36,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:38,315 INFO L124 PetriNetUnfolderBase]: 4703/7213 cut-off events. [2024-06-04 15:40:38,315 INFO L125 PetriNetUnfolderBase]: For 773509/773511 co-relation queries the response was YES. [2024-06-04 15:40:38,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60022 conditions, 7213 events. 4703/7213 cut-off events. For 773509/773511 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41880 event pairs, 781 based on Foata normal form. 10/7218 useless extension candidates. Maximal degree in co-relation 59838. Up to 5145 conditions per place. [2024-06-04 15:40:38,433 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 363 selfloop transitions, 234 changer transitions 0/600 dead transitions. [2024-06-04 15:40:38,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 600 transitions, 10588 flow [2024-06-04 15:40:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:40:38,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-04 15:40:38,435 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 7910 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:40:38,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 600 transitions, 10588 flow [2024-06-04 15:40:41,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 600 transitions, 10459 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 15:40:41,938 INFO L231 Difference]: Finished difference. Result has 389 places, 560 transitions, 8811 flow [2024-06-04 15:40:41,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7781, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8811, PETRI_PLACES=389, PETRI_TRANSITIONS=560} [2024-06-04 15:40:41,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 15:40:41,939 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 560 transitions, 8811 flow [2024-06-04 15:40:41,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:41,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:41,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:41,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:40:41,940 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)] === [2024-06-04 15:40:41,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1911963073, now seen corresponding path program 2 times [2024-06-04 15:40:41,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:41,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515477345] [2024-06-04 15:40:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:41,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515477345] [2024-06-04 15:40:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515477345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:42,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:42,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702374414] [2024-06-04 15:40:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:42,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:42,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:42,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:42,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 560 transitions, 8811 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:42,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:42,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:44,668 INFO L124 PetriNetUnfolderBase]: 4831/7392 cut-off events. [2024-06-04 15:40:44,669 INFO L125 PetriNetUnfolderBase]: For 847789/847791 co-relation queries the response was YES. [2024-06-04 15:40:44,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65254 conditions, 7392 events. 4831/7392 cut-off events. For 847789/847791 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42904 event pairs, 789 based on Foata normal form. 10/7396 useless extension candidates. Maximal degree in co-relation 65067. Up to 5752 conditions per place. [2024-06-04 15:40:44,800 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 382 selfloop transitions, 222 changer transitions 0/607 dead transitions. [2024-06-04 15:40:44,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 607 transitions, 11333 flow [2024-06-04 15:40:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:40:44,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-04 15:40:44,802 INFO L175 Difference]: Start difference. First operand has 389 places, 560 transitions, 8811 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:40:44,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 607 transitions, 11333 flow [2024-06-04 15:40:49,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 607 transitions, 10856 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-04 15:40:49,318 INFO L231 Difference]: Finished difference. Result has 394 places, 572 transitions, 9160 flow [2024-06-04 15:40:49,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9160, PETRI_PLACES=394, PETRI_TRANSITIONS=572} [2024-06-04 15:40:49,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-04 15:40:49,319 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 572 transitions, 9160 flow [2024-06-04 15:40:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:49,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:49,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:40:49,319 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)] === [2024-06-04 15:40:49,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2101598719, now seen corresponding path program 3 times [2024-06-04 15:40:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:49,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961191852] [2024-06-04 15:40:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961191852] [2024-06-04 15:40:50,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961191852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:50,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:50,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:50,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718448963] [2024-06-04 15:40:50,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:50,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:50,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:50,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 572 transitions, 9160 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:50,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:50,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:52,504 INFO L124 PetriNetUnfolderBase]: 4879/7457 cut-off events. [2024-06-04 15:40:52,505 INFO L125 PetriNetUnfolderBase]: For 863410/863418 co-relation queries the response was YES. [2024-06-04 15:40:52,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66280 conditions, 7457 events. 4879/7457 cut-off events. For 863410/863418 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43295 event pairs, 980 based on Foata normal form. 12/7465 useless extension candidates. Maximal degree in co-relation 66092. Up to 6947 conditions per place. [2024-06-04 15:40:52,607 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 472 selfloop transitions, 132 changer transitions 0/607 dead transitions. [2024-06-04 15:40:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 607 transitions, 10898 flow [2024-06-04 15:40:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:40:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:40:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-04 15:40:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:40:52,609 INFO L175 Difference]: Start difference. First operand has 394 places, 572 transitions, 9160 flow. Second operand 10 states and 160 transitions. [2024-06-04 15:40:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 607 transitions, 10898 flow [2024-06-04 15:40:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 607 transitions, 10495 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-04 15:40:56,309 INFO L231 Difference]: Finished difference. Result has 401 places, 582 transitions, 9283 flow [2024-06-04 15:40:56,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9283, PETRI_PLACES=401, PETRI_TRANSITIONS=582} [2024-06-04 15:40:56,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-04 15:40:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 582 transitions, 9283 flow [2024-06-04 15:40:56,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:56,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:40:56,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:40:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:40:56,310 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)] === [2024-06-04 15:40:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:40:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2101598595, now seen corresponding path program 3 times [2024-06-04 15:40:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:40:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960832746] [2024-06-04 15:40:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:40:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:40:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:40:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:40:57,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:40:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960832746] [2024-06-04 15:40:57,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960832746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:40:57,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:40:57,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:40:57,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327346751] [2024-06-04 15:40:57,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:40:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:40:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:40:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:40:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:40:57,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:40:57,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 582 transitions, 9283 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:40:57,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:40:57,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:40:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:40:59,297 INFO L124 PetriNetUnfolderBase]: 4887/7471 cut-off events. [2024-06-04 15:40:59,298 INFO L125 PetriNetUnfolderBase]: For 868648/868648 co-relation queries the response was YES. [2024-06-04 15:40:59,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66116 conditions, 7471 events. 4887/7471 cut-off events. For 868648/868648 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43296 event pairs, 1125 based on Foata normal form. 2/7471 useless extension candidates. Maximal degree in co-relation 65926. Up to 7396 conditions per place. [2024-06-04 15:40:59,427 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 33 changer transitions 0/602 dead transitions. [2024-06-04 15:40:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 602 transitions, 10593 flow [2024-06-04 15:40:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:40:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:40:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-04 15:40:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-04 15:40:59,428 INFO L175 Difference]: Start difference. First operand has 401 places, 582 transitions, 9283 flow. Second operand 9 states and 130 transitions. [2024-06-04 15:40:59,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 602 transitions, 10593 flow [2024-06-04 15:41:03,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 602 transitions, 10346 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:03,863 INFO L231 Difference]: Finished difference. Result has 404 places, 584 transitions, 9167 flow [2024-06-04 15:41:03,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9167, PETRI_PLACES=404, PETRI_TRANSITIONS=584} [2024-06-04 15:41:03,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-04 15:41:03,863 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 584 transitions, 9167 flow [2024-06-04 15:41:03,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:03,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:03,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:03,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:41:03,864 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)] === [2024-06-04 15:41:03,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2027427223, now seen corresponding path program 4 times [2024-06-04 15:41:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:03,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559376315] [2024-06-04 15:41:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:03,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:04,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559376315] [2024-06-04 15:41:04,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559376315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:04,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:04,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:04,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060646409] [2024-06-04 15:41:04,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:05,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:05,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 584 transitions, 9167 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:05,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:05,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:05,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:07,087 INFO L124 PetriNetUnfolderBase]: 4907/7496 cut-off events. [2024-06-04 15:41:07,087 INFO L125 PetriNetUnfolderBase]: For 894500/894508 co-relation queries the response was YES. [2024-06-04 15:41:07,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66301 conditions, 7496 events. 4907/7496 cut-off events. For 894500/894508 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43532 event pairs, 991 based on Foata normal form. 12/7505 useless extension candidates. Maximal degree in co-relation 66109. Up to 7209 conditions per place. [2024-06-04 15:41:07,239 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 522 selfloop transitions, 86 changer transitions 0/611 dead transitions. [2024-06-04 15:41:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 611 transitions, 10601 flow [2024-06-04 15:41:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:41:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:41:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-04 15:41:07,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37028824833702884 [2024-06-04 15:41:07,240 INFO L175 Difference]: Start difference. First operand has 404 places, 584 transitions, 9167 flow. Second operand 11 states and 167 transitions. [2024-06-04 15:41:07,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 611 transitions, 10601 flow [2024-06-04 15:41:12,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 611 transitions, 10490 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:12,767 INFO L231 Difference]: Finished difference. Result has 408 places, 588 transitions, 9345 flow [2024-06-04 15:41:12,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9056, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9345, PETRI_PLACES=408, PETRI_TRANSITIONS=588} [2024-06-04 15:41:12,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 15:41:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 588 transitions, 9345 flow [2024-06-04 15:41:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:12,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:12,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:41:12,768 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)] === [2024-06-04 15:41:12,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254243, now seen corresponding path program 5 times [2024-06-04 15:41:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761763341] [2024-06-04 15:41:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:13,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:13,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761763341] [2024-06-04 15:41:13,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761763341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:13,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:13,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689651501] [2024-06-04 15:41:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:13,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:13,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 588 transitions, 9345 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:13,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:13,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:13,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:15,638 INFO L124 PetriNetUnfolderBase]: 4927/7525 cut-off events. [2024-06-04 15:41:15,639 INFO L125 PetriNetUnfolderBase]: For 913068/913076 co-relation queries the response was YES. [2024-06-04 15:41:15,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67044 conditions, 7525 events. 4927/7525 cut-off events. For 913068/913076 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43695 event pairs, 1012 based on Foata normal form. 12/7533 useless extension candidates. Maximal degree in co-relation 66851. Up to 7237 conditions per place. [2024-06-04 15:41:15,773 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 528 selfloop transitions, 80 changer transitions 0/611 dead transitions. [2024-06-04 15:41:15,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 611 transitions, 10763 flow [2024-06-04 15:41:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 15:41:15,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-04 15:41:15,775 INFO L175 Difference]: Start difference. First operand has 408 places, 588 transitions, 9345 flow. Second operand 9 states and 141 transitions. [2024-06-04 15:41:15,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 611 transitions, 10763 flow [2024-06-04 15:41:20,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 611 transitions, 10508 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-04 15:41:20,981 INFO L231 Difference]: Finished difference. Result has 408 places, 592 transitions, 9375 flow [2024-06-04 15:41:20,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9375, PETRI_PLACES=408, PETRI_TRANSITIONS=592} [2024-06-04 15:41:20,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 15:41:20,982 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 592 transitions, 9375 flow [2024-06-04 15:41:20,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:20,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:20,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:20,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:41:20,983 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)] === [2024-06-04 15:41:20,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249593, now seen corresponding path program 6 times [2024-06-04 15:41:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255645775] [2024-06-04 15:41:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:21,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255645775] [2024-06-04 15:41:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255645775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:21,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:21,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515180668] [2024-06-04 15:41:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:21,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:22,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 592 transitions, 9375 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:22,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:22,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:24,287 INFO L124 PetriNetUnfolderBase]: 5186/7887 cut-off events. [2024-06-04 15:41:24,287 INFO L125 PetriNetUnfolderBase]: For 1039444/1039446 co-relation queries the response was YES. [2024-06-04 15:41:24,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72202 conditions, 7887 events. 5186/7887 cut-off events. For 1039444/1039446 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45874 event pairs, 857 based on Foata normal form. 10/7891 useless extension candidates. Maximal degree in co-relation 72008. Up to 6704 conditions per place. [2024-06-04 15:41:24,404 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 479 selfloop transitions, 170 changer transitions 0/652 dead transitions. [2024-06-04 15:41:24,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 652 transitions, 12184 flow [2024-06-04 15:41:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:41:24,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-04 15:41:24,405 INFO L175 Difference]: Start difference. First operand has 408 places, 592 transitions, 9375 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:41:24,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 652 transitions, 12184 flow [2024-06-04 15:41:28,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 652 transitions, 11933 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:28,872 INFO L231 Difference]: Finished difference. Result has 412 places, 617 transitions, 10037 flow [2024-06-04 15:41:28,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9124, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10037, PETRI_PLACES=412, PETRI_TRANSITIONS=617} [2024-06-04 15:41:28,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-04 15:41:28,873 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 617 transitions, 10037 flow [2024-06-04 15:41:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:28,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:28,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:28,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:41:28,873 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)] === [2024-06-04 15:41:28,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2027434167, now seen corresponding path program 1 times [2024-06-04 15:41:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220901063] [2024-06-04 15:41:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:29,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:29,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220901063] [2024-06-04 15:41:29,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220901063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:29,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:29,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815590968] [2024-06-04 15:41:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:29,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:29,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:29,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 617 transitions, 10037 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:29,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:29,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:31,920 INFO L124 PetriNetUnfolderBase]: 5202/7909 cut-off events. [2024-06-04 15:41:31,921 INFO L125 PetriNetUnfolderBase]: For 1049054/1049062 co-relation queries the response was YES. [2024-06-04 15:41:32,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73523 conditions, 7909 events. 5202/7909 cut-off events. For 1049054/1049062 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45960 event pairs, 1015 based on Foata normal form. 12/7917 useless extension candidates. Maximal degree in co-relation 73326. Up to 7694 conditions per place. [2024-06-04 15:41:32,069 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 573 selfloop transitions, 61 changer transitions 0/637 dead transitions. [2024-06-04 15:41:32,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 637 transitions, 11475 flow [2024-06-04 15:41:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:41:32,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-04 15:41:32,071 INFO L175 Difference]: Start difference. First operand has 412 places, 617 transitions, 10037 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:41:32,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 637 transitions, 11475 flow [2024-06-04 15:41:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 637 transitions, 11252 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-04 15:41:36,279 INFO L231 Difference]: Finished difference. Result has 418 places, 620 transitions, 10046 flow [2024-06-04 15:41:36,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9814, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10046, PETRI_PLACES=418, PETRI_TRANSITIONS=620} [2024-06-04 15:41:36,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-04 15:41:36,279 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 620 transitions, 10046 flow [2024-06-04 15:41:36,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:36,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:36,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:36,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:41:36,280 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)] === [2024-06-04 15:41:36,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249469, now seen corresponding path program 4 times [2024-06-04 15:41:36,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:36,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939838627] [2024-06-04 15:41:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:36,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939838627] [2024-06-04 15:41:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939838627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043896439] [2024-06-04 15:41:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:37,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:37,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 620 transitions, 10046 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:37,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:37,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:37,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:39,338 INFO L124 PetriNetUnfolderBase]: 5210/7923 cut-off events. [2024-06-04 15:41:39,339 INFO L125 PetriNetUnfolderBase]: For 1054476/1054476 co-relation queries the response was YES. [2024-06-04 15:41:39,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73520 conditions, 7923 events. 5210/7923 cut-off events. For 1054476/1054476 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46082 event pairs, 1144 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 73321. Up to 7863 conditions per place. [2024-06-04 15:41:39,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 609 selfloop transitions, 25 changer transitions 0/637 dead transitions. [2024-06-04 15:41:39,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 637 transitions, 11418 flow [2024-06-04 15:41:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-04 15:41:39,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-04 15:41:39,484 INFO L175 Difference]: Start difference. First operand has 418 places, 620 transitions, 10046 flow. Second operand 9 states and 126 transitions. [2024-06-04 15:41:39,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 637 transitions, 11418 flow [2024-06-04 15:41:43,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 637 transitions, 11208 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:43,866 INFO L231 Difference]: Finished difference. Result has 421 places, 622 transitions, 9955 flow [2024-06-04 15:41:43,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9836, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9955, PETRI_PLACES=421, PETRI_TRANSITIONS=622} [2024-06-04 15:41:43,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-04 15:41:43,867 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 622 transitions, 9955 flow [2024-06-04 15:41:43,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:43,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:43,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:43,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:41:43,868 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)] === [2024-06-04 15:41:43,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -351776179, now seen corresponding path program 2 times [2024-06-04 15:41:43,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:43,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105288944] [2024-06-04 15:41:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:43,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:44,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:44,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105288944] [2024-06-04 15:41:44,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105288944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:44,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095823009] [2024-06-04 15:41:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 622 transitions, 9955 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:44,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:47,268 INFO L124 PetriNetUnfolderBase]: 5226/7944 cut-off events. [2024-06-04 15:41:47,268 INFO L125 PetriNetUnfolderBase]: For 1080997/1081005 co-relation queries the response was YES. [2024-06-04 15:41:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73635 conditions, 7944 events. 5226/7944 cut-off events. For 1080997/1081005 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46200 event pairs, 1050 based on Foata normal form. 12/7953 useless extension candidates. Maximal degree in co-relation 73435. Up to 7847 conditions per place. [2024-06-04 15:41:47,400 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 598 selfloop transitions, 36 changer transitions 0/637 dead transitions. [2024-06-04 15:41:47,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 637 transitions, 11367 flow [2024-06-04 15:41:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-04 15:41:47,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-04 15:41:47,402 INFO L175 Difference]: Start difference. First operand has 421 places, 622 transitions, 9955 flow. Second operand 9 states and 126 transitions. [2024-06-04 15:41:47,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 637 transitions, 11367 flow [2024-06-04 15:41:51,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 637 transitions, 11268 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:51,554 INFO L231 Difference]: Finished difference. Result has 423 places, 625 transitions, 10044 flow [2024-06-04 15:41:51,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9856, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10044, PETRI_PLACES=423, PETRI_TRANSITIONS=625} [2024-06-04 15:41:51,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-04 15:41:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 625 transitions, 10044 flow [2024-06-04 15:41:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:51,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:51,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:51,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:41:51,556 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)] === [2024-06-04 15:41:51,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1649222547, now seen corresponding path program 3 times [2024-06-04 15:41:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:51,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016089464] [2024-06-04 15:41:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:52,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:52,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016089464] [2024-06-04 15:41:52,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016089464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:52,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:52,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559503919] [2024-06-04 15:41:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:52,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:52,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:41:52,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 625 transitions, 10044 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:52,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:52,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:41:52,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:54,788 INFO L124 PetriNetUnfolderBase]: 5242/7969 cut-off events. [2024-06-04 15:41:54,788 INFO L125 PetriNetUnfolderBase]: For 1104653/1104661 co-relation queries the response was YES. [2024-06-04 15:41:54,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74246 conditions, 7969 events. 5242/7969 cut-off events. For 1104653/1104661 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46344 event pairs, 1059 based on Foata normal form. 12/7977 useless extension candidates. Maximal degree in co-relation 74045. Up to 7842 conditions per place. [2024-06-04 15:41:54,937 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 594 selfloop transitions, 42 changer transitions 0/639 dead transitions. [2024-06-04 15:41:54,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 639 transitions, 11464 flow [2024-06-04 15:41:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 15:41:54,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-04 15:41:54,938 INFO L175 Difference]: Start difference. First operand has 423 places, 625 transitions, 10044 flow. Second operand 7 states and 108 transitions. [2024-06-04 15:41:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 639 transitions, 11464 flow [2024-06-04 15:41:59,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 639 transitions, 11299 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:59,075 INFO L231 Difference]: Finished difference. Result has 423 places, 628 transitions, 10089 flow [2024-06-04 15:41:59,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9879, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10089, PETRI_PLACES=423, PETRI_TRANSITIONS=628} [2024-06-04 15:41:59,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-04 15:41:59,076 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 628 transitions, 10089 flow [2024-06-04 15:41:59,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:59,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:59,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:59,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:41:59,076 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)] === [2024-06-04 15:41:59,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1624531613, now seen corresponding path program 1 times [2024-06-04 15:41:59,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769139838] [2024-06-04 15:41:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:59,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:59,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769139838] [2024-06-04 15:41:59,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769139838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:59,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:59,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109640784] [2024-06-04 15:41:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:59,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:00,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:00,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 628 transitions, 10089 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:00,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:00,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:00,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:02,065 INFO L124 PetriNetUnfolderBase]: 5244/7972 cut-off events. [2024-06-04 15:42:02,065 INFO L125 PetriNetUnfolderBase]: For 1110943/1110951 co-relation queries the response was YES. [2024-06-04 15:42:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74347 conditions, 7972 events. 5244/7972 cut-off events. For 1110943/1110951 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46356 event pairs, 1090 based on Foata normal form. 10/7978 useless extension candidates. Maximal degree in co-relation 74145. Up to 7847 conditions per place. [2024-06-04 15:42:02,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 596 selfloop transitions, 44 changer transitions 0/643 dead transitions. [2024-06-04 15:42:02,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 643 transitions, 11557 flow [2024-06-04 15:42:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 15:42:02,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-04 15:42:02,214 INFO L175 Difference]: Start difference. First operand has 423 places, 628 transitions, 10089 flow. Second operand 7 states and 109 transitions. [2024-06-04 15:42:02,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 643 transitions, 11557 flow [2024-06-04 15:42:05,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 643 transitions, 11373 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:05,686 INFO L231 Difference]: Finished difference. Result has 425 places, 632 transitions, 10155 flow [2024-06-04 15:42:05,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9907, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10155, PETRI_PLACES=425, PETRI_TRANSITIONS=632} [2024-06-04 15:42:05,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-04 15:42:05,687 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 632 transitions, 10155 flow [2024-06-04 15:42:05,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:05,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:05,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:05,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:42:05,688 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)] === [2024-06-04 15:42:05,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1193024257, now seen corresponding path program 4 times [2024-06-04 15:42:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342435946] [2024-06-04 15:42:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342435946] [2024-06-04 15:42:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342435946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:06,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:06,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154586745] [2024-06-04 15:42:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:06,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:06,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 632 transitions, 10155 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:06,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:06,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:08,759 INFO L124 PetriNetUnfolderBase]: 5260/7996 cut-off events. [2024-06-04 15:42:08,759 INFO L125 PetriNetUnfolderBase]: For 1120760/1120768 co-relation queries the response was YES. [2024-06-04 15:42:08,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74391 conditions, 7996 events. 5260/7996 cut-off events. For 1120760/1120768 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46526 event pairs, 1077 based on Foata normal form. 12/8004 useless extension candidates. Maximal degree in co-relation 74188. Up to 7852 conditions per place. [2024-06-04 15:42:08,913 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 48 changer transitions 0/648 dead transitions. [2024-06-04 15:42:08,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 648 transitions, 11607 flow [2024-06-04 15:42:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-04 15:42:08,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34688346883468835 [2024-06-04 15:42:08,915 INFO L175 Difference]: Start difference. First operand has 425 places, 632 transitions, 10155 flow. Second operand 9 states and 128 transitions. [2024-06-04 15:42:08,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 648 transitions, 11607 flow [2024-06-04 15:42:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 648 transitions, 11413 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:13,711 INFO L231 Difference]: Finished difference. Result has 429 places, 635 transitions, 10181 flow [2024-06-04 15:42:13,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9961, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10181, PETRI_PLACES=429, PETRI_TRANSITIONS=635} [2024-06-04 15:42:13,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-04 15:42:13,711 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 635 transitions, 10181 flow [2024-06-04 15:42:13,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:13,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:13,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:13,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:42:13,714 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)] === [2024-06-04 15:42:13,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash 680027253, now seen corresponding path program 7 times [2024-06-04 15:42:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068541746] [2024-06-04 15:42:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068541746] [2024-06-04 15:42:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068541746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:14,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:14,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170207807] [2024-06-04 15:42:14,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:14,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:14,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:14,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 635 transitions, 10181 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:14,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:14,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:14,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:17,084 INFO L124 PetriNetUnfolderBase]: 5280/8024 cut-off events. [2024-06-04 15:42:17,085 INFO L125 PetriNetUnfolderBase]: For 1143479/1143487 co-relation queries the response was YES. [2024-06-04 15:42:17,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74975 conditions, 8024 events. 5280/8024 cut-off events. For 1143479/1143487 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46687 event pairs, 1079 based on Foata normal form. 12/8032 useless extension candidates. Maximal degree in co-relation 74771. Up to 7906 conditions per place. [2024-06-04 15:42:17,202 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 614 selfloop transitions, 35 changer transitions 0/652 dead transitions. [2024-06-04 15:42:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 11671 flow [2024-06-04 15:42:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-04 15:42:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-04 15:42:17,203 INFO L175 Difference]: Start difference. First operand has 429 places, 635 transitions, 10181 flow. Second operand 8 states and 120 transitions. [2024-06-04 15:42:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 11671 flow [2024-06-04 15:42:20,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 652 transitions, 11416 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-04 15:42:20,016 INFO L231 Difference]: Finished difference. Result has 427 places, 639 transitions, 10145 flow [2024-06-04 15:42:20,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10145, PETRI_PLACES=427, PETRI_TRANSITIONS=639} [2024-06-04 15:42:20,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 15:42:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 639 transitions, 10145 flow [2024-06-04 15:42:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:20,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:20,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:42:20,017 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)] === [2024-06-04 15:42:20,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1624828531, now seen corresponding path program 5 times [2024-06-04 15:42:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779244738] [2024-06-04 15:42:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:20,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779244738] [2024-06-04 15:42:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779244738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:20,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:20,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:20,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419027480] [2024-06-04 15:42:20,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:20,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:21,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:21,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 639 transitions, 10145 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:21,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:21,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:21,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:23,105 INFO L124 PetriNetUnfolderBase]: 5283/8029 cut-off events. [2024-06-04 15:42:23,106 INFO L125 PetriNetUnfolderBase]: For 1151601/1151609 co-relation queries the response was YES. [2024-06-04 15:42:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74733 conditions, 8029 events. 5283/8029 cut-off events. For 1151601/1151609 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46686 event pairs, 1092 based on Foata normal form. 12/8037 useless extension candidates. Maximal degree in co-relation 74530. Up to 7916 conditions per place. [2024-06-04 15:42:23,246 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 616 selfloop transitions, 34 changer transitions 0/653 dead transitions. [2024-06-04 15:42:23,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 653 transitions, 11595 flow [2024-06-04 15:42:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-04 15:42:23,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-04 15:42:23,247 INFO L175 Difference]: Start difference. First operand has 427 places, 639 transitions, 10145 flow. Second operand 7 states and 107 transitions. [2024-06-04 15:42:23,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 653 transitions, 11595 flow [2024-06-04 15:42:28,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 653 transitions, 11410 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:28,414 INFO L231 Difference]: Finished difference. Result has 428 places, 642 transitions, 10160 flow [2024-06-04 15:42:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9960, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10160, PETRI_PLACES=428, PETRI_TRANSITIONS=642} [2024-06-04 15:42:28,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-04 15:42:28,414 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 642 transitions, 10160 flow [2024-06-04 15:42:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:28,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:42:28,415 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)] === [2024-06-04 15:42:28,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1388176577, now seen corresponding path program 8 times [2024-06-04 15:42:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796509115] [2024-06-04 15:42:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796509115] [2024-06-04 15:42:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796509115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:29,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:29,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164653841] [2024-06-04 15:42:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:29,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:29,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 642 transitions, 10160 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:29,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:29,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:29,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:31,508 INFO L124 PetriNetUnfolderBase]: 5363/8143 cut-off events. [2024-06-04 15:42:31,509 INFO L125 PetriNetUnfolderBase]: For 1216402/1216404 co-relation queries the response was YES. [2024-06-04 15:42:31,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76421 conditions, 8143 events. 5363/8143 cut-off events. For 1216402/1216404 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 47464 event pairs, 877 based on Foata normal form. 10/8147 useless extension candidates. Maximal degree in co-relation 76217. Up to 6835 conditions per place. [2024-06-04 15:42:31,656 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 469 selfloop transitions, 212 changer transitions 0/684 dead transitions. [2024-06-04 15:42:31,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 684 transitions, 12617 flow [2024-06-04 15:42:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 15:42:31,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-04 15:42:31,657 INFO L175 Difference]: Start difference. First operand has 428 places, 642 transitions, 10160 flow. Second operand 8 states and 145 transitions. [2024-06-04 15:42:31,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 684 transitions, 12617 flow [2024-06-04 15:42:36,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 684 transitions, 12439 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:36,293 INFO L231 Difference]: Finished difference. Result has 432 places, 651 transitions, 10819 flow [2024-06-04 15:42:36,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9982, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10819, PETRI_PLACES=432, PETRI_TRANSITIONS=651} [2024-06-04 15:42:36,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-04 15:42:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 651 transitions, 10819 flow [2024-06-04 15:42:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:36,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:36,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:36,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:42:36,294 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)] === [2024-06-04 15:42:36,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1388171927, now seen corresponding path program 9 times [2024-06-04 15:42:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557485588] [2024-06-04 15:42:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:36,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557485588] [2024-06-04 15:42:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557485588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:37,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:37,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:37,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329535172] [2024-06-04 15:42:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:37,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:37,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:37,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:37,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 651 transitions, 10819 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:37,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:37,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:37,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:39,661 INFO L124 PetriNetUnfolderBase]: 5403/8197 cut-off events. [2024-06-04 15:42:39,662 INFO L125 PetriNetUnfolderBase]: For 1242905/1242913 co-relation queries the response was YES. [2024-06-04 15:42:39,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78946 conditions, 8197 events. 5403/8197 cut-off events. For 1242905/1242913 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47851 event pairs, 1063 based on Foata normal form. 12/8205 useless extension candidates. Maximal degree in co-relation 78740. Up to 7739 conditions per place. [2024-06-04 15:42:39,800 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 579 selfloop transitions, 104 changer transitions 0/686 dead transitions. [2024-06-04 15:42:39,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 686 transitions, 12911 flow [2024-06-04 15:42:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:42:39,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:42:39,801 INFO L175 Difference]: Start difference. First operand has 432 places, 651 transitions, 10819 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:42:39,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 686 transitions, 12911 flow [2024-06-04 15:42:44,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 686 transitions, 12240 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:44,313 INFO L231 Difference]: Finished difference. Result has 435 places, 661 transitions, 10761 flow [2024-06-04 15:42:44,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10186, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10761, PETRI_PLACES=435, PETRI_TRANSITIONS=661} [2024-06-04 15:42:44,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-04 15:42:44,313 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 661 transitions, 10761 flow [2024-06-04 15:42:44,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:44,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:44,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:44,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:42:44,314 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)] === [2024-06-04 15:42:44,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:44,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1193208955, now seen corresponding path program 5 times [2024-06-04 15:42:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:44,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992592393] [2024-06-04 15:42:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992592393] [2024-06-04 15:42:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992592393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:45,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491711630] [2024-06-04 15:42:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:45,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:45,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 661 transitions, 10761 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:45,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:45,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:45,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:47,561 INFO L124 PetriNetUnfolderBase]: 5398/8192 cut-off events. [2024-06-04 15:42:47,561 INFO L125 PetriNetUnfolderBase]: For 1234569/1234569 co-relation queries the response was YES. [2024-06-04 15:42:47,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 8192 events. 5398/8192 cut-off events. For 1234569/1234569 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47700 event pairs, 1150 based on Foata normal form. 2/8192 useless extension candidates. Maximal degree in co-relation 77570. Up to 8099 conditions per place. [2024-06-04 15:42:47,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 30 changer transitions 0/684 dead transitions. [2024-06-04 15:42:47,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 684 transitions, 12201 flow [2024-06-04 15:42:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:42:47,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:42:47,681 INFO L175 Difference]: Start difference. First operand has 435 places, 661 transitions, 10761 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:42:47,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 684 transitions, 12201 flow [2024-06-04 15:42:52,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 684 transitions, 11899 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:52,137 INFO L231 Difference]: Finished difference. Result has 439 places, 661 transitions, 10527 flow [2024-06-04 15:42:52,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10527, PETRI_PLACES=439, PETRI_TRANSITIONS=661} [2024-06-04 15:42:52,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-04 15:42:52,137 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 661 transitions, 10527 flow [2024-06-04 15:42:52,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:52,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:52,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:52,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:42:52,139 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)] === [2024-06-04 15:42:52,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1193031201, now seen corresponding path program 10 times [2024-06-04 15:42:52,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:52,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589062209] [2024-06-04 15:42:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:52,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589062209] [2024-06-04 15:42:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589062209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:53,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536375447] [2024-06-04 15:42:53,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:53,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:53,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:42:53,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 661 transitions, 10527 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:53,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:53,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:42:53,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:55,446 INFO L124 PetriNetUnfolderBase]: 5402/8195 cut-off events. [2024-06-04 15:42:55,460 INFO L125 PetriNetUnfolderBase]: For 1250379/1250387 co-relation queries the response was YES. [2024-06-04 15:42:55,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77301 conditions, 8195 events. 5402/8195 cut-off events. For 1250379/1250387 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47840 event pairs, 1069 based on Foata normal form. 12/8204 useless extension candidates. Maximal degree in co-relation 77092. Up to 7880 conditions per place. [2024-06-04 15:42:55,604 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 82 changer transitions 0/682 dead transitions. [2024-06-04 15:42:55,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 682 transitions, 12114 flow [2024-06-04 15:42:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:42:55,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-04 15:42:55,605 INFO L175 Difference]: Start difference. First operand has 439 places, 661 transitions, 10527 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:42:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 682 transitions, 12114 flow [2024-06-04 15:42:59,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 682 transitions, 12027 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:59,848 INFO L231 Difference]: Finished difference. Result has 440 places, 665 transitions, 10768 flow [2024-06-04 15:42:59,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10768, PETRI_PLACES=440, PETRI_TRANSITIONS=665} [2024-06-04 15:42:59,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-04 15:42:59,848 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 665 transitions, 10768 flow [2024-06-04 15:42:59,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:59,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:59,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:59,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:42:59,849 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)] === [2024-06-04 15:42:59,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1899851323, now seen corresponding path program 1 times [2024-06-04 15:42:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239294504] [2024-06-04 15:42:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:00,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239294504] [2024-06-04 15:43:00,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239294504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:00,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:00,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:00,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920511581] [2024-06-04 15:43:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:00,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:00,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:00,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:00,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 665 transitions, 10768 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:00,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:00,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:00,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:02,879 INFO L124 PetriNetUnfolderBase]: 5476/8295 cut-off events. [2024-06-04 15:43:02,880 INFO L125 PetriNetUnfolderBase]: For 1288215/1288219 co-relation queries the response was YES. [2024-06-04 15:43:02,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79706 conditions, 8295 events. 5476/8295 cut-off events. For 1288215/1288219 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48364 event pairs, 951 based on Foata normal form. 6/8299 useless extension candidates. Maximal degree in co-relation 79496. Up to 7696 conditions per place. [2024-06-04 15:43:03,022 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 600 selfloop transitions, 112 changer transitions 0/715 dead transitions. [2024-06-04 15:43:03,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 715 transitions, 12908 flow [2024-06-04 15:43:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:43:03,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:43:03,023 INFO L175 Difference]: Start difference. First operand has 440 places, 665 transitions, 10768 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:43:03,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 715 transitions, 12908 flow [2024-06-04 15:43:06,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 715 transitions, 12625 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:06,987 INFO L231 Difference]: Finished difference. Result has 444 places, 675 transitions, 11074 flow [2024-06-04 15:43:06,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10485, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11074, PETRI_PLACES=444, PETRI_TRANSITIONS=675} [2024-06-04 15:43:06,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-04 15:43:06,987 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 675 transitions, 11074 flow [2024-06-04 15:43:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:06,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:06,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:43:06,988 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)] === [2024-06-04 15:43:06,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1678247819, now seen corresponding path program 1 times [2024-06-04 15:43:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:06,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923925556] [2024-06-04 15:43:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:07,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:07,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923925556] [2024-06-04 15:43:07,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923925556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:07,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:07,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207991772] [2024-06-04 15:43:07,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:07,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:07,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:07,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 675 transitions, 11074 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:07,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:07,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:07,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:09,979 INFO L124 PetriNetUnfolderBase]: 5533/8382 cut-off events. [2024-06-04 15:43:09,979 INFO L125 PetriNetUnfolderBase]: For 1353604/1353614 co-relation queries the response was YES. [2024-06-04 15:43:10,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81271 conditions, 8382 events. 5533/8382 cut-off events. For 1353604/1353614 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48965 event pairs, 965 based on Foata normal form. 14/8392 useless extension candidates. Maximal degree in co-relation 81059. Up to 7910 conditions per place. [2024-06-04 15:43:10,136 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 621 selfloop transitions, 93 changer transitions 0/717 dead transitions. [2024-06-04 15:43:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 717 transitions, 13044 flow [2024-06-04 15:43:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 15:43:10,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:43:10,137 INFO L175 Difference]: Start difference. First operand has 444 places, 675 transitions, 11074 flow. Second operand 8 states and 136 transitions. [2024-06-04 15:43:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 717 transitions, 13044 flow [2024-06-04 15:43:15,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 717 transitions, 12731 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:15,507 INFO L231 Difference]: Finished difference. Result has 449 places, 688 transitions, 11215 flow [2024-06-04 15:43:15,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10771, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11215, PETRI_PLACES=449, PETRI_TRANSITIONS=688} [2024-06-04 15:43:15,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-04 15:43:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 688 transitions, 11215 flow [2024-06-04 15:43:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:15,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:15,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:43:15,509 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)] === [2024-06-04 15:43:15,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 446327163, now seen corresponding path program 2 times [2024-06-04 15:43:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828628048] [2024-06-04 15:43:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828628048] [2024-06-04 15:43:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828628048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:16,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885388529] [2024-06-04 15:43:16,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:16,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 688 transitions, 11215 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:16,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:18,606 INFO L124 PetriNetUnfolderBase]: 5527/8372 cut-off events. [2024-06-04 15:43:18,606 INFO L125 PetriNetUnfolderBase]: For 1351011/1351015 co-relation queries the response was YES. [2024-06-04 15:43:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81952 conditions, 8372 events. 5527/8372 cut-off events. For 1351011/1351015 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48916 event pairs, 939 based on Foata normal form. 6/8376 useless extension candidates. Maximal degree in co-relation 81736. Up to 7942 conditions per place. [2024-06-04 15:43:18,750 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 622 selfloop transitions, 98 changer transitions 0/723 dead transitions. [2024-06-04 15:43:18,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 723 transitions, 12837 flow [2024-06-04 15:43:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:43:18,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-04 15:43:18,751 INFO L175 Difference]: Start difference. First operand has 449 places, 688 transitions, 11215 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:43:18,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 723 transitions, 12837 flow [2024-06-04 15:43:23,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 723 transitions, 12717 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-04 15:43:23,431 INFO L231 Difference]: Finished difference. Result has 456 places, 688 transitions, 11313 flow [2024-06-04 15:43:23,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11111, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11313, PETRI_PLACES=456, PETRI_TRANSITIONS=688} [2024-06-04 15:43:23,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 15:43:23,431 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 688 transitions, 11313 flow [2024-06-04 15:43:23,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:23,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:23,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:43:23,432 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)] === [2024-06-04 15:43:23,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1245806955, now seen corresponding path program 2 times [2024-06-04 15:43:23,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:23,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130840324] [2024-06-04 15:43:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:23,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:24,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130840324] [2024-06-04 15:43:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130840324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640754756] [2024-06-04 15:43:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:24,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:24,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 688 transitions, 11313 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:24,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:24,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:24,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:26,438 INFO L124 PetriNetUnfolderBase]: 5547/8399 cut-off events. [2024-06-04 15:43:26,438 INFO L125 PetriNetUnfolderBase]: For 1391251/1391261 co-relation queries the response was YES. [2024-06-04 15:43:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81611 conditions, 8399 events. 5547/8399 cut-off events. For 1391251/1391261 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48992 event pairs, 1066 based on Foata normal form. 14/8409 useless extension candidates. Maximal degree in co-relation 81393. Up to 8100 conditions per place. [2024-06-04 15:43:26,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 632 selfloop transitions, 81 changer transitions 0/716 dead transitions. [2024-06-04 15:43:26,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 716 transitions, 12926 flow [2024-06-04 15:43:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 15:43:26,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-04 15:43:26,592 INFO L175 Difference]: Start difference. First operand has 456 places, 688 transitions, 11313 flow. Second operand 8 states and 127 transitions. [2024-06-04 15:43:26,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 716 transitions, 12926 flow [2024-06-04 15:43:32,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 716 transitions, 12664 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:32,890 INFO L231 Difference]: Finished difference. Result has 456 places, 694 transitions, 11306 flow [2024-06-04 15:43:32,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11306, PETRI_PLACES=456, PETRI_TRANSITIONS=694} [2024-06-04 15:43:32,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 15:43:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 694 transitions, 11306 flow [2024-06-04 15:43:32,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:32,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:32,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:32,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:43:32,891 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)] === [2024-06-04 15:43:32,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash 623458683, now seen corresponding path program 3 times [2024-06-04 15:43:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:32,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074937547] [2024-06-04 15:43:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:33,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:33,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074937547] [2024-06-04 15:43:33,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074937547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:33,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:33,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300814150] [2024-06-04 15:43:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:33,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:33,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:33,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 694 transitions, 11306 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:33,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:33,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:33,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:36,049 INFO L124 PetriNetUnfolderBase]: 5567/8425 cut-off events. [2024-06-04 15:43:36,049 INFO L125 PetriNetUnfolderBase]: For 1400729/1400733 co-relation queries the response was YES. [2024-06-04 15:43:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81902 conditions, 8425 events. 5567/8425 cut-off events. For 1400729/1400733 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49174 event pairs, 1029 based on Foata normal form. 6/8429 useless extension candidates. Maximal degree in co-relation 81684. Up to 8128 conditions per place. [2024-06-04 15:43:36,202 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 639 selfloop transitions, 88 changer transitions 0/730 dead transitions. [2024-06-04 15:43:36,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 730 transitions, 13038 flow [2024-06-04 15:43:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:43:36,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-04 15:43:36,203 INFO L175 Difference]: Start difference. First operand has 456 places, 694 transitions, 11306 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:43:36,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 730 transitions, 13038 flow [2024-06-04 15:43:41,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 730 transitions, 12864 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 15:43:41,777 INFO L231 Difference]: Finished difference. Result has 462 places, 700 transitions, 11470 flow [2024-06-04 15:43:41,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11470, PETRI_PLACES=462, PETRI_TRANSITIONS=700} [2024-06-04 15:43:41,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-04 15:43:41,777 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 700 transitions, 11470 flow [2024-06-04 15:43:41,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:41,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:41,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:43:41,778 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)] === [2024-06-04 15:43:41,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1501116299, now seen corresponding path program 3 times [2024-06-04 15:43:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:41,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947564885] [2024-06-04 15:43:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:42,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:42,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947564885] [2024-06-04 15:43:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947564885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:42,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:42,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:43:42,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685783623] [2024-06-04 15:43:42,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:42,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:43:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:43:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:43:42,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:42,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 700 transitions, 11470 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:42,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:42,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:42,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:44,795 INFO L124 PetriNetUnfolderBase]: 5587/8456 cut-off events. [2024-06-04 15:43:44,796 INFO L125 PetriNetUnfolderBase]: For 1438754/1438764 co-relation queries the response was YES. [2024-06-04 15:43:44,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82385 conditions, 8456 events. 5587/8456 cut-off events. For 1438754/1438764 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49354 event pairs, 1037 based on Foata normal form. 14/8465 useless extension candidates. Maximal degree in co-relation 82165. Up to 8134 conditions per place. [2024-06-04 15:43:44,955 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 638 selfloop transitions, 86 changer transitions 0/727 dead transitions. [2024-06-04 15:43:44,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 727 transitions, 13101 flow [2024-06-04 15:43:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:43:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:43:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:43:44,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-04 15:43:44,959 INFO L175 Difference]: Start difference. First operand has 462 places, 700 transitions, 11470 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:43:44,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 727 transitions, 13101 flow [2024-06-04 15:43:51,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 727 transitions, 12866 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:51,239 INFO L231 Difference]: Finished difference. Result has 464 places, 703 transitions, 11480 flow [2024-06-04 15:43:51,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11235, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11480, PETRI_PLACES=464, PETRI_TRANSITIONS=703} [2024-06-04 15:43:51,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-04 15:43:51,240 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 703 transitions, 11480 flow [2024-06-04 15:43:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:43:51,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:51,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:43:51,241 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)] === [2024-06-04 15:43:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash -274733833, now seen corresponding path program 4 times [2024-06-04 15:43:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719882262] [2024-06-04 15:43:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719882262] [2024-06-04 15:43:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719882262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983236550] [2024-06-04 15:43:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:52,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:52,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:52,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:52,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:43:52,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 703 transitions, 11480 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:52,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:52,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:43:52,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:54,596 INFO L124 PetriNetUnfolderBase]: 5981/8993 cut-off events. [2024-06-04 15:43:54,596 INFO L125 PetriNetUnfolderBase]: For 1779115/1779115 co-relation queries the response was YES. [2024-06-04 15:43:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94611 conditions, 8993 events. 5981/8993 cut-off events. For 1779115/1779115 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 52426 event pairs, 991 based on Foata normal form. 2/8993 useless extension candidates. Maximal degree in co-relation 94390. Up to 7530 conditions per place. [2024-06-04 15:43:54,779 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 588 selfloop transitions, 204 changer transitions 0/795 dead transitions. [2024-06-04 15:43:54,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 795 transitions, 15487 flow [2024-06-04 15:43:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:43:54,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-04 15:43:54,780 INFO L175 Difference]: Start difference. First operand has 464 places, 703 transitions, 11480 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:43:54,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 795 transitions, 15487 flow [2024-06-04 15:44:01,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 795 transitions, 15291 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:01,946 INFO L231 Difference]: Finished difference. Result has 470 places, 753 transitions, 13377 flow [2024-06-04 15:44:01,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11284, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13377, PETRI_PLACES=470, PETRI_TRANSITIONS=753} [2024-06-04 15:44:01,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-04 15:44:01,947 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 753 transitions, 13377 flow [2024-06-04 15:44:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:01,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:01,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:44:01,948 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)] === [2024-06-04 15:44:01,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1895778451, now seen corresponding path program 4 times [2024-06-04 15:44:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309799632] [2024-06-04 15:44:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:02,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309799632] [2024-06-04 15:44:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309799632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:02,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:02,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:02,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895865380] [2024-06-04 15:44:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:02,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:02,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:02,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:44:02,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 753 transitions, 13377 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:44:02,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:02,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:44:02,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:05,382 INFO L124 PetriNetUnfolderBase]: 6061/9108 cut-off events. [2024-06-04 15:44:05,382 INFO L125 PetriNetUnfolderBase]: For 1871039/1871041 co-relation queries the response was YES. [2024-06-04 15:44:05,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98602 conditions, 9108 events. 6061/9108 cut-off events. For 1871039/1871041 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 53209 event pairs, 923 based on Foata normal form. 6/9108 useless extension candidates. Maximal degree in co-relation 98377. Up to 8124 conditions per place. [2024-06-04 15:44:05,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 622 selfloop transitions, 170 changer transitions 0/795 dead transitions. [2024-06-04 15:44:05,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 795 transitions, 15793 flow [2024-06-04 15:44:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:44:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:44:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:44:05,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-04 15:44:05,567 INFO L175 Difference]: Start difference. First operand has 470 places, 753 transitions, 13377 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:44:05,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 795 transitions, 15793 flow [2024-06-04 15:44:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 795 transitions, 15458 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:14,717 INFO L231 Difference]: Finished difference. Result has 476 places, 768 transitions, 13639 flow [2024-06-04 15:44:14,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13042, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13639, PETRI_PLACES=476, PETRI_TRANSITIONS=768} [2024-06-04 15:44:14,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-04 15:44:14,718 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 768 transitions, 13639 flow [2024-06-04 15:44:14,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:44:14,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:14,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:44:14,719 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)] === [2024-06-04 15:44:14,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -274613863, now seen corresponding path program 5 times [2024-06-04 15:44:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54748450] [2024-06-04 15:44:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:15,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:15,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54748450] [2024-06-04 15:44:15,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54748450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:15,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:15,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:15,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081269602] [2024-06-04 15:44:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:15,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:44:15,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 768 transitions, 13639 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:15,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:15,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:44:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:18,406 INFO L124 PetriNetUnfolderBase]: 6071/9118 cut-off events. [2024-06-04 15:44:18,406 INFO L125 PetriNetUnfolderBase]: For 1879946/1879946 co-relation queries the response was YES. [2024-06-04 15:44:18,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99060 conditions, 9118 events. 6071/9118 cut-off events. For 1879946/1879946 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 53178 event pairs, 973 based on Foata normal form. 2/9118 useless extension candidates. Maximal degree in co-relation 98832. Up to 8520 conditions per place. [2024-06-04 15:44:18,584 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 676 selfloop transitions, 125 changer transitions 0/804 dead transitions. [2024-06-04 15:44:18,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 804 transitions, 15714 flow [2024-06-04 15:44:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:44:18,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-04 15:44:18,586 INFO L175 Difference]: Start difference. First operand has 476 places, 768 transitions, 13639 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:44:18,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 804 transitions, 15714 flow [2024-06-04 15:44:26,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 804 transitions, 15494 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 15:44:26,367 INFO L231 Difference]: Finished difference. Result has 482 places, 771 transitions, 13768 flow [2024-06-04 15:44:26,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13419, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13768, PETRI_PLACES=482, PETRI_TRANSITIONS=771} [2024-06-04 15:44:26,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-04 15:44:26,368 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 771 transitions, 13768 flow [2024-06-04 15:44:26,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:26,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:26,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:26,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:44:26,369 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)] === [2024-06-04 15:44:26,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:26,369 INFO L85 PathProgramCache]: Analyzing trace with hash -655042538, now seen corresponding path program 1 times [2024-06-04 15:44:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:26,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190262562] [2024-06-04 15:44:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:27,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190262562] [2024-06-04 15:44:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190262562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:27,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:27,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591030737] [2024-06-04 15:44:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:27,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:27,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:27,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:44:27,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 771 transitions, 13768 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:27,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:27,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:44:27,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:30,266 INFO L124 PetriNetUnfolderBase]: 6068/9114 cut-off events. [2024-06-04 15:44:30,266 INFO L125 PetriNetUnfolderBase]: For 1903585/1903589 co-relation queries the response was YES. [2024-06-04 15:44:30,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98922 conditions, 9114 events. 6068/9114 cut-off events. For 1903585/1903589 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53157 event pairs, 1221 based on Foata normal form. 5/9117 useless extension candidates. Maximal degree in co-relation 98693. Up to 8944 conditions per place. [2024-06-04 15:44:30,442 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 733 selfloop transitions, 68 changer transitions 0/804 dead transitions. [2024-06-04 15:44:30,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 804 transitions, 15822 flow [2024-06-04 15:44:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:44:30,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-04 15:44:30,443 INFO L175 Difference]: Start difference. First operand has 482 places, 771 transitions, 13768 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:44:30,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 804 transitions, 15822 flow [2024-06-04 15:44:37,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 804 transitions, 15583 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:37,879 INFO L231 Difference]: Finished difference. Result has 487 places, 775 transitions, 13795 flow [2024-06-04 15:44:37,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13529, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13795, PETRI_PLACES=487, PETRI_TRANSITIONS=775} [2024-06-04 15:44:37,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-04 15:44:37,880 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 775 transitions, 13795 flow [2024-06-04 15:44:37,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:37,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:37,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:44:37,880 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)] === [2024-06-04 15:44:37,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1901020675, now seen corresponding path program 6 times [2024-06-04 15:44:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773307096] [2024-06-04 15:44:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:38,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:38,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773307096] [2024-06-04 15:44:38,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773307096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:38,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:38,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605202291] [2024-06-04 15:44:38,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:38,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:38,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:38,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:38,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:44:38,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 775 transitions, 13795 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:38,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:38,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:44:38,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:41,687 INFO L124 PetriNetUnfolderBase]: 6088/9142 cut-off events. [2024-06-04 15:44:41,687 INFO L125 PetriNetUnfolderBase]: For 1951074/1951074 co-relation queries the response was YES. [2024-06-04 15:44:41,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99243 conditions, 9142 events. 6088/9142 cut-off events. For 1951074/1951074 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53390 event pairs, 938 based on Foata normal form. 4/9144 useless extension candidates. Maximal degree in co-relation 99012. Up to 7653 conditions per place. [2024-06-04 15:44:42,102 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 223 changer transitions 0/823 dead transitions. [2024-06-04 15:44:42,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 823 transitions, 16631 flow [2024-06-04 15:44:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:44:42,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-04 15:44:42,113 INFO L175 Difference]: Start difference. First operand has 487 places, 775 transitions, 13795 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:44:42,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 823 transitions, 16631 flow [2024-06-04 15:44:49,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 823 transitions, 16471 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:49,409 INFO L231 Difference]: Finished difference. Result has 490 places, 781 transitions, 14249 flow [2024-06-04 15:44:49,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13635, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14249, PETRI_PLACES=490, PETRI_TRANSITIONS=781} [2024-06-04 15:44:49,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-04 15:44:49,410 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 781 transitions, 14249 flow [2024-06-04 15:44:49,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:49,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:49,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:49,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:44:49,411 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)] === [2024-06-04 15:44:49,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -654952545, now seen corresponding path program 7 times [2024-06-04 15:44:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913399955] [2024-06-04 15:44:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:50,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913399955] [2024-06-04 15:44:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913399955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:50,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889261766] [2024-06-04 15:44:50,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:50,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:50,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:44:50,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 781 transitions, 14249 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:50,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:50,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:44:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:53,868 INFO L124 PetriNetUnfolderBase]: 6112/9176 cut-off events. [2024-06-04 15:44:53,868 INFO L125 PetriNetUnfolderBase]: For 1986418/1986418 co-relation queries the response was YES. [2024-06-04 15:44:53,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100786 conditions, 9176 events. 6112/9176 cut-off events. For 1986418/1986418 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 53580 event pairs, 936 based on Foata normal form. 4/9178 useless extension candidates. Maximal degree in co-relation 100554. Up to 7680 conditions per place. [2024-06-04 15:44:54,028 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 235 changer transitions 0/825 dead transitions. [2024-06-04 15:44:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 825 transitions, 17093 flow [2024-06-04 15:44:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:44:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-04 15:44:54,030 INFO L175 Difference]: Start difference. First operand has 490 places, 781 transitions, 14249 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:44:54,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 825 transitions, 17093 flow [2024-06-04 15:45:02,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 825 transitions, 16591 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-04 15:45:02,651 INFO L231 Difference]: Finished difference. Result has 493 places, 787 transitions, 14406 flow [2024-06-04 15:45:02,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13766, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14406, PETRI_PLACES=493, PETRI_TRANSITIONS=787} [2024-06-04 15:45:02,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-04 15:45:02,652 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 787 transitions, 14406 flow [2024-06-04 15:45:02,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:02,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:02,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:02,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:45:02,652 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)] === [2024-06-04 15:45:02,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1735915036, now seen corresponding path program 2 times [2024-06-04 15:45:02,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:02,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245330744] [2024-06-04 15:45:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245330744] [2024-06-04 15:45:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245330744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:03,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547027926] [2024-06-04 15:45:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:03,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:45:03,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 787 transitions, 14406 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:03,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:03,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:45:03,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:07,438 INFO L124 PetriNetUnfolderBase]: 6511/9737 cut-off events. [2024-06-04 15:45:07,438 INFO L125 PetriNetUnfolderBase]: For 2125079/2125079 co-relation queries the response was YES. [2024-06-04 15:45:07,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108723 conditions, 9737 events. 6511/9737 cut-off events. For 2125079/2125079 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 56945 event pairs, 1011 based on Foata normal form. 3/9735 useless extension candidates. Maximal degree in co-relation 108490. Up to 8815 conditions per place. [2024-06-04 15:45:07,622 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 730 selfloop transitions, 209 changer transitions 0/942 dead transitions. [2024-06-04 15:45:07,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 942 transitions, 19994 flow [2024-06-04 15:45:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:45:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:45:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:45:07,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-04 15:45:07,623 INFO L175 Difference]: Start difference. First operand has 493 places, 787 transitions, 14406 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:45:07,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 942 transitions, 19994 flow [2024-06-04 15:45:16,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 942 transitions, 19346 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:16,018 INFO L231 Difference]: Finished difference. Result has 502 places, 895 transitions, 17189 flow [2024-06-04 15:45:16,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13964, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17189, PETRI_PLACES=502, PETRI_TRANSITIONS=895} [2024-06-04 15:45:16,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-04 15:45:16,019 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 895 transitions, 17189 flow [2024-06-04 15:45:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:16,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:16,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:16,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:45:16,020 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)] === [2024-06-04 15:45:16,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1905044041, now seen corresponding path program 5 times [2024-06-04 15:45:16,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:16,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428810397] [2024-06-04 15:45:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:16,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428810397] [2024-06-04 15:45:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428810397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:16,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825243290] [2024-06-04 15:45:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:16,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:45:16,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 895 transitions, 17189 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:45:16,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:16,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:45:16,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:20,318 INFO L124 PetriNetUnfolderBase]: 6531/9768 cut-off events. [2024-06-04 15:45:20,318 INFO L125 PetriNetUnfolderBase]: For 2162974/2162976 co-relation queries the response was YES. [2024-06-04 15:45:20,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109760 conditions, 9768 events. 6531/9768 cut-off events. For 2162974/2162976 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 57173 event pairs, 920 based on Foata normal form. 6/9769 useless extension candidates. Maximal degree in co-relation 109522. Up to 8650 conditions per place. [2024-06-04 15:45:20,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 706 selfloop transitions, 219 changer transitions 0/928 dead transitions. [2024-06-04 15:45:20,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 928 transitions, 19767 flow [2024-06-04 15:45:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:45:20,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-04 15:45:20,519 INFO L175 Difference]: Start difference. First operand has 502 places, 895 transitions, 17189 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:45:20,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 928 transitions, 19767 flow [2024-06-04 15:45:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 928 transitions, 19491 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-04 15:45:29,233 INFO L231 Difference]: Finished difference. Result has 508 places, 903 transitions, 17539 flow [2024-06-04 15:45:29,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16915, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17539, PETRI_PLACES=508, PETRI_TRANSITIONS=903} [2024-06-04 15:45:29,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-04 15:45:29,234 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 903 transitions, 17539 flow [2024-06-04 15:45:29,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:45:29,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:29,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:29,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:45:29,235 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)] === [2024-06-04 15:45:29,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash 664227414, now seen corresponding path program 3 times [2024-06-04 15:45:29,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:29,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302383764] [2024-06-04 15:45:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:29,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:30,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:30,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302383764] [2024-06-04 15:45:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302383764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:30,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433575527] [2024-06-04 15:45:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:30,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:45:30,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 903 transitions, 17539 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:30,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:30,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:45:30,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:34,067 INFO L124 PetriNetUnfolderBase]: 6526/9759 cut-off events. [2024-06-04 15:45:34,067 INFO L125 PetriNetUnfolderBase]: For 2171630/2171630 co-relation queries the response was YES. [2024-06-04 15:45:34,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109890 conditions, 9759 events. 6526/9759 cut-off events. For 2171630/2171630 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 57130 event pairs, 976 based on Foata normal form. 3/9760 useless extension candidates. Maximal degree in co-relation 109650. Up to 8936 conditions per place. [2024-06-04 15:45:34,243 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 716 selfloop transitions, 217 changer transitions 0/936 dead transitions. [2024-06-04 15:45:34,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 936 transitions, 20164 flow [2024-06-04 15:45:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:45:34,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-04 15:45:34,244 INFO L175 Difference]: Start difference. First operand has 508 places, 903 transitions, 17539 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:45:34,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 936 transitions, 20164 flow [2024-06-04 15:45:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 936 transitions, 19718 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:43,642 INFO L231 Difference]: Finished difference. Result has 513 places, 906 transitions, 17730 flow [2024-06-04 15:45:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17093, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17730, PETRI_PLACES=513, PETRI_TRANSITIONS=906} [2024-06-04 15:45:43,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-04 15:45:43,642 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 906 transitions, 17730 flow [2024-06-04 15:45:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:43,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:45:43,643 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)] === [2024-06-04 15:45:43,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034601, now seen corresponding path program 8 times [2024-06-04 15:45:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:43,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366396574] [2024-06-04 15:45:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:44,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366396574] [2024-06-04 15:45:44,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366396574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:44,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101672502] [2024-06-04 15:45:44,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:44,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:44,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:44,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:45:44,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 906 transitions, 17730 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:44,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:44,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:45:44,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:48,047 INFO L124 PetriNetUnfolderBase]: 6524/9757 cut-off events. [2024-06-04 15:45:48,047 INFO L125 PetriNetUnfolderBase]: For 2196144/2196144 co-relation queries the response was YES. [2024-06-04 15:45:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109522 conditions, 9757 events. 6524/9757 cut-off events. For 2196144/2196144 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 57057 event pairs, 980 based on Foata normal form. 6/9761 useless extension candidates. Maximal degree in co-relation 109280. Up to 8938 conditions per place. [2024-06-04 15:45:48,237 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 725 selfloop transitions, 211 changer transitions 0/939 dead transitions. [2024-06-04 15:45:48,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 939 transitions, 20296 flow [2024-06-04 15:45:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:45:48,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-04 15:45:48,239 INFO L175 Difference]: Start difference. First operand has 513 places, 906 transitions, 17730 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:45:48,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 939 transitions, 20296 flow [2024-06-04 15:45:56,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 939 transitions, 19935 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-04 15:45:56,323 INFO L231 Difference]: Finished difference. Result has 518 places, 909 transitions, 17874 flow [2024-06-04 15:45:56,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17369, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17874, PETRI_PLACES=518, PETRI_TRANSITIONS=909} [2024-06-04 15:45:56,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-04 15:45:56,328 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 909 transitions, 17874 flow [2024-06-04 15:45:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:56,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:56,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:56,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:45:56,329 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)] === [2024-06-04 15:45:56,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1540040181, now seen corresponding path program 9 times [2024-06-04 15:45:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:56,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084374699] [2024-06-04 15:45:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:57,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084374699] [2024-06-04 15:45:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084374699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:57,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:57,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433232508] [2024-06-04 15:45:57,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:57,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:45:57,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 909 transitions, 17874 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:57,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:57,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:45:57,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:00,789 INFO L124 PetriNetUnfolderBase]: 6510/9738 cut-off events. [2024-06-04 15:46:00,789 INFO L125 PetriNetUnfolderBase]: For 2183155/2183155 co-relation queries the response was YES. [2024-06-04 15:46:00,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109066 conditions, 9738 events. 6510/9738 cut-off events. For 2183155/2183155 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 56960 event pairs, 972 based on Foata normal form. 4/9740 useless extension candidates. Maximal degree in co-relation 108823. Up to 8930 conditions per place. [2024-06-04 15:46:00,979 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 726 selfloop transitions, 214 changer transitions 0/943 dead transitions. [2024-06-04 15:46:00,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 943 transitions, 20404 flow [2024-06-04 15:46:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:46:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:46:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-04 15:46:00,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-04 15:46:00,981 INFO L175 Difference]: Start difference. First operand has 518 places, 909 transitions, 17874 flow. Second operand 11 states and 179 transitions. [2024-06-04 15:46:00,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 943 transitions, 20404 flow [2024-06-04 15:46:11,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 943 transitions, 19876 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:11,364 INFO L231 Difference]: Finished difference. Result has 523 places, 909 transitions, 17784 flow [2024-06-04 15:46:11,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17346, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17784, PETRI_PLACES=523, PETRI_TRANSITIONS=909} [2024-06-04 15:46:11,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-04 15:46:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 909 transitions, 17784 flow [2024-06-04 15:46:11,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:11,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:11,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:46:11,365 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)] === [2024-06-04 15:46:11,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1905032881, now seen corresponding path program 6 times [2024-06-04 15:46:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624387112] [2024-06-04 15:46:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624387112] [2024-06-04 15:46:12,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624387112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:12,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:12,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:12,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449258] [2024-06-04 15:46:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:12,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:12,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:12,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:46:12,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 909 transitions, 17784 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:46:12,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:12,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:46:12,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:15,845 INFO L124 PetriNetUnfolderBase]: 6498/9725 cut-off events. [2024-06-04 15:46:15,845 INFO L125 PetriNetUnfolderBase]: For 2182734/2182736 co-relation queries the response was YES. [2024-06-04 15:46:15,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108493 conditions, 9725 events. 6498/9725 cut-off events. For 2182734/2182736 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 57017 event pairs, 913 based on Foata normal form. 6/9726 useless extension candidates. Maximal degree in co-relation 108249. Up to 8615 conditions per place. [2024-06-04 15:46:16,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 720 selfloop transitions, 212 changer transitions 0/935 dead transitions. [2024-06-04 15:46:16,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 935 transitions, 20293 flow [2024-06-04 15:46:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:46:16,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-04 15:46:16,024 INFO L175 Difference]: Start difference. First operand has 523 places, 909 transitions, 17784 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:46:16,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 935 transitions, 20293 flow [2024-06-04 15:46:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 935 transitions, 19743 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-04 15:46:25,345 INFO L231 Difference]: Finished difference. Result has 524 places, 909 transitions, 17666 flow [2024-06-04 15:46:25,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17234, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17666, PETRI_PLACES=524, PETRI_TRANSITIONS=909} [2024-06-04 15:46:25,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-04 15:46:25,345 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 909 transitions, 17666 flow [2024-06-04 15:46:25,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:46:25,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:25,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:25,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:46:25,346 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)] === [2024-06-04 15:46:25,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1802632499, now seen corresponding path program 7 times [2024-06-04 15:46:25,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:25,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108925586] [2024-06-04 15:46:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:25,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:26,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108925586] [2024-06-04 15:46:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108925586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:26,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:26,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482301344] [2024-06-04 15:46:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:26,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:26,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:46:26,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 909 transitions, 17666 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:46:26,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:26,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:46:26,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:29,597 INFO L124 PetriNetUnfolderBase]: 6566/9819 cut-off events. [2024-06-04 15:46:29,598 INFO L125 PetriNetUnfolderBase]: For 2265011/2265013 co-relation queries the response was YES. [2024-06-04 15:46:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110321 conditions, 9819 events. 6566/9819 cut-off events. For 2265011/2265013 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 57546 event pairs, 1156 based on Foata normal form. 6/9820 useless extension candidates. Maximal degree in co-relation 110076. Up to 9408 conditions per place. [2024-06-04 15:46:29,773 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 838 selfloop transitions, 95 changer transitions 0/936 dead transitions. [2024-06-04 15:46:29,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 936 transitions, 20082 flow [2024-06-04 15:46:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:46:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:46:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:46:29,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-04 15:46:29,774 INFO L175 Difference]: Start difference. First operand has 524 places, 909 transitions, 17666 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:46:29,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 936 transitions, 20082 flow [2024-06-04 15:46:39,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 936 transitions, 19685 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:46:39,663 INFO L231 Difference]: Finished difference. Result has 527 places, 918 transitions, 17711 flow [2024-06-04 15:46:39,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17287, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17711, PETRI_PLACES=527, PETRI_TRANSITIONS=918} [2024-06-04 15:46:39,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-04 15:46:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 918 transitions, 17711 flow [2024-06-04 15:46:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-04 15:46:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:39,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:39,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:46:39,665 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)] === [2024-06-04 15:46:39,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1809989698, now seen corresponding path program 4 times [2024-06-04 15:46:39,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:39,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422681049] [2024-06-04 15:46:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:39,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:40,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:40,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422681049] [2024-06-04 15:46:40,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422681049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:40,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:40,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:40,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081248169] [2024-06-04 15:46:40,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:40,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:40,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:40,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:40,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-04 15:46:40,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 918 transitions, 17711 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:40,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:40,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-04 15:46:40,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand