./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.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/mix042.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix042.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:30:16,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:30:16,939 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:30:16,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:30:16,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:30:16,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:30:16,988 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:30:16,988 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:30:16,989 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:30:16,992 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:30:16,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:30:16,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:30:16,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:30:16,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:30:16,994 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:30:16,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:30:16,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:30:16,995 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:30:16,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:30:16,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:30:16,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:30:16,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:30:16,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:30:16,997 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:30:16,997 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:30:16,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:30:16,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:30:16,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:30:16,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:30:16,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:30:16,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:30:16,999 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:30:16,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:30:16,999 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:30:17,000 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:30:17,000 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:30:17,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:30:17,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:30:17,002 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:30:17,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:30:17,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:30:17,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:30:17,267 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:30:17,268 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:30:17,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix042.opt.yml/witness.yml [2024-06-14 12:30:17,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:30:17,436 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:30:17,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-14 12:30:18,531 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:30:18,817 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:30:18,822 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-14 12:30:18,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924bbfa96/20944d00d36b435f8729da9c3e3708f1/FLAG06ec5cb0b [2024-06-14 12:30:18,855 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924bbfa96/20944d00d36b435f8729da9c3e3708f1 [2024-06-14 12:30:18,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:30:18,857 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:30:18,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:30:18,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:30:18,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:30:18,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:30:17" (1/2) ... [2024-06-14 12:30:18,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751c25c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:30:18, skipping insertion in model container [2024-06-14 12:30:18,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:30:17" (1/2) ... [2024-06-14 12:30:18,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32600512 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:30:18, skipping insertion in model container [2024-06-14 12:30:18,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:30:18" (2/2) ... [2024-06-14 12:30:18,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751c25c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:18, skipping insertion in model container [2024-06-14 12:30:18,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:30:18" (2/2) ... [2024-06-14 12:30:18,870 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:30:18,947 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:30:18,948 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-14 12:30:18,949 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-14 12:30:18,949 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) [2024-06-14 12:30:18,949 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:30:18,949 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-14 12:30:18,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:30:19,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:30:19,340 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:30:19,461 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:30:19,492 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:30:19,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19 WrapperNode [2024-06-14 12:30:19,493 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:30:19,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:30:19,494 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:30:19,494 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:30:19,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,548 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-14 12:30:19,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:30:19,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:30:19,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:30:19,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:30:19,562 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,582 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:30:19,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:30:19,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:30:19,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:30:19,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:30:19,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (1/1) ... [2024-06-14 12:30:19,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:30:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:30:19,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:30:19,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:30:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:30:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:30:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:30:19,671 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:30:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:30:19,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:30:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:30:19,672 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:30:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:30:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:30:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:30:19,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:30:19,674 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:30:19,805 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:30:19,807 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:30:20,226 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:30:20,226 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:30:20,365 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:30:20,365 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:30:20,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:30:20 BoogieIcfgContainer [2024-06-14 12:30:20,366 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:30:20,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:30:20,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:30:20,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:30:20,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:30:17" (1/4) ... [2024-06-14 12:30:20,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5118e9bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:30:20, skipping insertion in model container [2024-06-14 12:30:20,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:30:18" (2/4) ... [2024-06-14 12:30:20,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5118e9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:30:20, skipping insertion in model container [2024-06-14 12:30:20,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:30:19" (3/4) ... [2024-06-14 12:30:20,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5118e9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:30:20, skipping insertion in model container [2024-06-14 12:30:20,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:30:20" (4/4) ... [2024-06-14 12:30:20,374 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.opt.i [2024-06-14 12:30:20,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:30:20,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:30:20,387 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:30:20,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:30:20,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:30:20,477 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:30:20,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:30:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 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. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:30:20,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:30:20,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:30:20,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:30:20,514 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;@23fb43b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:30:20,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:30:20,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:30:20,518 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:30:20,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:30:20,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:20,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:30:20,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:20,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1396276895, now seen corresponding path program 1 times [2024-06-14 12:30:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666417118] [2024-06-14 12:30:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666417118] [2024-06-14 12:30:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666417118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:21,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:21,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:30:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472050176] [2024-06-14 12:30:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:21,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:30:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:30:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:30:21,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:30:21,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:21,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:21,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:30:21,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:22,198 INFO L124 PetriNetUnfolderBase]: 1059/1718 cut-off events. [2024-06-14 12:30:22,199 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-06-14 12:30:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 1718 events. 1059/1718 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8808 event pairs, 698 based on Foata normal form. 1/1665 useless extension candidates. Maximal degree in co-relation 3369. Up to 1593 conditions per place. [2024-06-14 12:30:22,213 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:30:22,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-14 12:30:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:30:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:30:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-14 12:30:22,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-06-14 12:30:22,226 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 76 transitions. [2024-06-14 12:30:22,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-14 12:30:22,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:22,232 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:30:22,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:30:22,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:30:22,237 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:30:22,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:22,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:22,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:22,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:30:22,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:22,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1792274688, now seen corresponding path program 1 times [2024-06-14 12:30:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:22,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288954176] [2024-06-14 12:30:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:22,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288954176] [2024-06-14 12:30:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288954176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:22,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:22,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:30:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063655458] [2024-06-14 12:30:22,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:22,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:30:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:30:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:30:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:23,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:23,277 INFO L124 PetriNetUnfolderBase]: 1215/1895 cut-off events. [2024-06-14 12:30:23,277 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-14 12:30:23,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4308 conditions, 1895 events. 1215/1895 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9500 event pairs, 648 based on Foata normal form. 3/1873 useless extension candidates. Maximal degree in co-relation 4293. Up to 1803 conditions per place. [2024-06-14 12:30:23,285 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:30:23,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-14 12:30:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:30:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:30:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-14 12:30:23,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-06-14 12:30:23,287 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 95 transitions. [2024-06-14 12:30:23,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-14 12:30:23,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:30:23,289 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:30:23,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:30:23,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:30:23,290 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:30:23,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:23,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:23,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:23,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:30:23,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:23,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1379032779, now seen corresponding path program 1 times [2024-06-14 12:30:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:23,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852757771] [2024-06-14 12:30:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:24,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852757771] [2024-06-14 12:30:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852757771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:24,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:30:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951406027] [2024-06-14 12:30:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:30:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:30:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:30:24,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:24,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:24,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:24,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:24,523 INFO L124 PetriNetUnfolderBase]: 1545/2374 cut-off events. [2024-06-14 12:30:24,523 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-14 12:30:24,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 2374 events. 1545/2374 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11598 event pairs, 575 based on Foata normal form. 6/2349 useless extension candidates. Maximal degree in co-relation 5931. Up to 2233 conditions per place. [2024-06-14 12:30:24,534 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-14 12:30:24,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 358 flow [2024-06-14 12:30:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 12:30:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 12:30:24,536 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-14 12:30:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 358 flow [2024-06-14 12:30:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 338 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:30:24,538 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 12:30:24,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 12:30:24,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 12:30:24,539 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 12:30:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:24,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:30:24,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:24,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1024671786, now seen corresponding path program 1 times [2024-06-14 12:30:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662308469] [2024-06-14 12:30:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662308469] [2024-06-14 12:30:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662308469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:25,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:25,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:30:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475759928] [2024-06-14 12:30:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:25,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:30:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:30:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:30:25,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:25,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:25,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:25,788 INFO L124 PetriNetUnfolderBase]: 1333/2130 cut-off events. [2024-06-14 12:30:25,789 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-06-14 12:30:25,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5785 conditions, 2130 events. 1333/2130 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10670 event pairs, 592 based on Foata normal form. 2/2101 useless extension candidates. Maximal degree in co-relation 5766. Up to 1980 conditions per place. [2024-06-14 12:30:25,804 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-14 12:30:25,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 329 flow [2024-06-14 12:30:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:30:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:30:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-14 12:30:25,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:30:25,809 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 96 transitions. [2024-06-14 12:30:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 329 flow [2024-06-14 12:30:25,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 302 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:25,813 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-14 12:30:25,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 12:30:25,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 12:30:25,814 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-14 12:30:25,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:25,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:25,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:30:25,815 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)] === [2024-06-14 12:30:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1723293024, now seen corresponding path program 1 times [2024-06-14 12:30:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:25,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882150121] [2024-06-14 12:30:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:26,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882150121] [2024-06-14 12:30:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882150121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:26,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:26,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:26,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619453617] [2024-06-14 12:30:26,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:26,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:26,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:26,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:26,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:26,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:26,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:27,150 INFO L124 PetriNetUnfolderBase]: 1323/2160 cut-off events. [2024-06-14 12:30:27,151 INFO L125 PetriNetUnfolderBase]: For 3045/3045 co-relation queries the response was YES. [2024-06-14 12:30:27,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 2160 events. 1323/2160 cut-off events. For 3045/3045 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11089 event pairs, 556 based on Foata normal form. 4/2155 useless extension candidates. Maximal degree in co-relation 6209. Up to 1948 conditions per place. [2024-06-14 12:30:27,161 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 12:30:27,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 378 flow [2024-06-14 12:30:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:30:27,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:30:27,163 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:30:27,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 378 flow [2024-06-14 12:30:27,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:27,166 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-14 12:30:27,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-14 12:30:27,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-14 12:30:27,167 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-14 12:30:27,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:27,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:27,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:27,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:30:27,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:27,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1156409737, now seen corresponding path program 1 times [2024-06-14 12:30:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:27,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624764707] [2024-06-14 12:30:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:27,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:27,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624764707] [2024-06-14 12:30:27,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624764707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:27,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:27,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968064114] [2024-06-14 12:30:27,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:28,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:28,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:28,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:28,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:28,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:28,534 INFO L124 PetriNetUnfolderBase]: 1541/2391 cut-off events. [2024-06-14 12:30:28,534 INFO L125 PetriNetUnfolderBase]: For 5054/5058 co-relation queries the response was YES. [2024-06-14 12:30:28,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 2391 events. 1541/2391 cut-off events. For 5054/5058 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11728 event pairs, 656 based on Foata normal form. 6/2387 useless extension candidates. Maximal degree in co-relation 7589. Up to 2244 conditions per place. [2024-06-14 12:30:28,546 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 12:30:28,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 486 flow [2024-06-14 12:30:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:30:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 12:30:28,548 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:30:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 486 flow [2024-06-14 12:30:28,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 456 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:28,552 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-14 12:30:28,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 12:30:28,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:30:28,554 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-14 12:30:28,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:28,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:28,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:30:28,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1906600747, now seen corresponding path program 2 times [2024-06-14 12:30:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525336631] [2024-06-14 12:30:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:29,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:29,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525336631] [2024-06-14 12:30:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525336631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:29,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198562106] [2024-06-14 12:30:29,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:29,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:29,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:29,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:29,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:29,882 INFO L124 PetriNetUnfolderBase]: 1536/2385 cut-off events. [2024-06-14 12:30:29,883 INFO L125 PetriNetUnfolderBase]: For 6787/6791 co-relation queries the response was YES. [2024-06-14 12:30:29,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8108 conditions, 2385 events. 1536/2385 cut-off events. For 6787/6791 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11704 event pairs, 659 based on Foata normal form. 6/2381 useless extension candidates. Maximal degree in co-relation 8085. Up to 2239 conditions per place. [2024-06-14 12:30:29,902 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-14 12:30:29,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 460 flow [2024-06-14 12:30:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:30:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:30:29,904 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:30:29,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 460 flow [2024-06-14 12:30:29,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 426 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 12:30:29,910 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 296 flow [2024-06-14 12:30:29,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 12:30:29,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:30:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 296 flow [2024-06-14 12:30:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:29,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:30:29,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1015185, now seen corresponding path program 1 times [2024-06-14 12:30:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387794043] [2024-06-14 12:30:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387794043] [2024-06-14 12:30:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387794043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001008157] [2024-06-14 12:30:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:30,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:30,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:30,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:30,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:30,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:31,260 INFO L124 PetriNetUnfolderBase]: 1583/2463 cut-off events. [2024-06-14 12:30:31,260 INFO L125 PetriNetUnfolderBase]: For 8075/8077 co-relation queries the response was YES. [2024-06-14 12:30:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8512 conditions, 2463 events. 1583/2463 cut-off events. For 8075/8077 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12103 event pairs, 652 based on Foata normal form. 4/2457 useless extension candidates. Maximal degree in co-relation 8487. Up to 2291 conditions per place. [2024-06-14 12:30:31,271 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 67 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-06-14 12:30:31,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 632 flow [2024-06-14 12:30:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:30:31,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:30:31,273 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 296 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:30:31,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 632 flow [2024-06-14 12:30:31,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 576 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:31,283 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 408 flow [2024-06-14 12:30:31,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-14 12:30:31,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-14 12:30:31,285 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 408 flow [2024-06-14 12:30:31,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:31,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:31,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:31,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:30:31,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:31,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:31,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1488845073, now seen corresponding path program 2 times [2024-06-14 12:30:31,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:31,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487681433] [2024-06-14 12:30:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:32,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:32,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487681433] [2024-06-14 12:30:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487681433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:32,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:32,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:32,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394661932] [2024-06-14 12:30:32,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:32,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:32,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:32,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:32,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:32,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:32,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:32,792 INFO L124 PetriNetUnfolderBase]: 1594/2483 cut-off events. [2024-06-14 12:30:32,792 INFO L125 PetriNetUnfolderBase]: For 10452/10456 co-relation queries the response was YES. [2024-06-14 12:30:32,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 2483 events. 1594/2483 cut-off events. For 10452/10456 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12259 event pairs, 631 based on Foata normal form. 6/2478 useless extension candidates. Maximal degree in co-relation 9190. Up to 2293 conditions per place. [2024-06-14 12:30:32,804 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-14 12:30:32,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 706 flow [2024-06-14 12:30:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:30:32,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 12:30:32,806 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 408 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:30:32,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 706 flow [2024-06-14 12:30:32,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 664 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:32,814 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 467 flow [2024-06-14 12:30:32,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-14 12:30:32,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 12:30:32,815 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 467 flow [2024-06-14 12:30:32,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:32,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:32,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:32,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:30:32,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:32,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1488965229, now seen corresponding path program 1 times [2024-06-14 12:30:32,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392736654] [2024-06-14 12:30:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:33,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392736654] [2024-06-14 12:30:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392736654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508216852] [2024-06-14 12:30:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:33,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:33,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:33,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:33,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:33,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:33,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:34,375 INFO L124 PetriNetUnfolderBase]: 1616/2515 cut-off events. [2024-06-14 12:30:34,375 INFO L125 PetriNetUnfolderBase]: For 13720/13724 co-relation queries the response was YES. [2024-06-14 12:30:34,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 2515 events. 1616/2515 cut-off events. For 13720/13724 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12348 event pairs, 585 based on Foata normal form. 8/2509 useless extension candidates. Maximal degree in co-relation 9882. Up to 2277 conditions per place. [2024-06-14 12:30:34,388 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2024-06-14 12:30:34,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 845 flow [2024-06-14 12:30:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:30:34,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 12:30:34,389 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 467 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:30:34,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 845 flow [2024-06-14 12:30:34,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 766 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:34,399 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 510 flow [2024-06-14 12:30:34,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-14 12:30:34,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 12:30:34,400 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 510 flow [2024-06-14 12:30:34,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:34,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:34,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:34,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:30:34,400 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:34,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1488965043, now seen corresponding path program 3 times [2024-06-14 12:30:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753878505] [2024-06-14 12:30:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753878505] [2024-06-14 12:30:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753878505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426186651] [2024-06-14 12:30:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:35,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:35,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 510 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:35,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:35,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:35,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:35,850 INFO L124 PetriNetUnfolderBase]: 1627/2533 cut-off events. [2024-06-14 12:30:35,851 INFO L125 PetriNetUnfolderBase]: For 13545/13549 co-relation queries the response was YES. [2024-06-14 12:30:35,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9986 conditions, 2533 events. 1627/2533 cut-off events. For 13545/13549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12482 event pairs, 617 based on Foata normal form. 4/2524 useless extension candidates. Maximal degree in co-relation 9957. Up to 2289 conditions per place. [2024-06-14 12:30:35,864 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 37 changer transitions 0/108 dead transitions. [2024-06-14 12:30:35,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 884 flow [2024-06-14 12:30:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:30:35,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:30:35,865 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 510 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:30:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 884 flow [2024-06-14 12:30:35,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 851 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:35,878 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 629 flow [2024-06-14 12:30:35,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=629, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-14 12:30:35,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 12:30:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 629 flow [2024-06-14 12:30:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:35,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:30:35,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:35,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1024917423, now seen corresponding path program 4 times [2024-06-14 12:30:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797268856] [2024-06-14 12:30:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797268856] [2024-06-14 12:30:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797268856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414958300] [2024-06-14 12:30:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:36,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:36,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 629 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:36,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:36,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:36,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:37,425 INFO L124 PetriNetUnfolderBase]: 1622/2526 cut-off events. [2024-06-14 12:30:37,426 INFO L125 PetriNetUnfolderBase]: For 16834/16838 co-relation queries the response was YES. [2024-06-14 12:30:37,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10555 conditions, 2526 events. 1622/2526 cut-off events. For 16834/16838 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12442 event pairs, 623 based on Foata normal form. 2/2514 useless extension candidates. Maximal degree in co-relation 10524. Up to 2284 conditions per place. [2024-06-14 12:30:37,438 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2024-06-14 12:30:37,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 885 flow [2024-06-14 12:30:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:30:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:30:37,439 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 629 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:30:37,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 885 flow [2024-06-14 12:30:37,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 821 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:37,451 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 647 flow [2024-06-14 12:30:37,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-14 12:30:37,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 12:30:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 647 flow [2024-06-14 12:30:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:37,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:37,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:37,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:30:37,453 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:37,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1772969247, now seen corresponding path program 2 times [2024-06-14 12:30:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:37,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61977894] [2024-06-14 12:30:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61977894] [2024-06-14 12:30:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61977894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:38,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750754026] [2024-06-14 12:30:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:38,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:38,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 647 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:38,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:38,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:38,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:39,000 INFO L124 PetriNetUnfolderBase]: 1644/2561 cut-off events. [2024-06-14 12:30:39,000 INFO L125 PetriNetUnfolderBase]: For 19376/19384 co-relation queries the response was YES. [2024-06-14 12:30:39,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10974 conditions, 2561 events. 1644/2561 cut-off events. For 19376/19384 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12564 event pairs, 576 based on Foata normal form. 12/2560 useless extension candidates. Maximal degree in co-relation 10941. Up to 2305 conditions per place. [2024-06-14 12:30:39,013 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-14 12:30:39,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 1019 flow [2024-06-14 12:30:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:30:39,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:30:39,014 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 647 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:30:39,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 1019 flow [2024-06-14 12:30:39,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 114 transitions, 919 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:39,027 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 643 flow [2024-06-14 12:30:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=643, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-06-14 12:30:39,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 12:30:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 643 flow [2024-06-14 12:30:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:39,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:30:39,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:39,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1450748893, now seen corresponding path program 3 times [2024-06-14 12:30:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139140624] [2024-06-14 12:30:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:39,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139140624] [2024-06-14 12:30:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139140624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:39,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:39,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836616444] [2024-06-14 12:30:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:39,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:39,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:39,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 643 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:39,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:39,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:39,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:40,594 INFO L124 PetriNetUnfolderBase]: 1634/2547 cut-off events. [2024-06-14 12:30:40,595 INFO L125 PetriNetUnfolderBase]: For 21283/21291 co-relation queries the response was YES. [2024-06-14 12:30:40,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 2547 events. 1634/2547 cut-off events. For 21283/21291 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12556 event pairs, 576 based on Foata normal form. 12/2546 useless extension candidates. Maximal degree in co-relation 11048. Up to 2297 conditions per place. [2024-06-14 12:30:40,612 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-14 12:30:40,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 929 flow [2024-06-14 12:30:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:30:40,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:30:40,614 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 643 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:30:40,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 929 flow [2024-06-14 12:30:40,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 834 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:40,637 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 616 flow [2024-06-14 12:30:40,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-14 12:30:40,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:30:40,638 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 616 flow [2024-06-14 12:30:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:40,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:40,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:30:40,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:40,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1772723169, now seen corresponding path program 1 times [2024-06-14 12:30:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899725067] [2024-06-14 12:30:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:41,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:41,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899725067] [2024-06-14 12:30:41,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899725067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:41,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:41,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446142995] [2024-06-14 12:30:41,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:41,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:41,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:42,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:42,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 616 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:42,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:42,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:42,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:42,575 INFO L124 PetriNetUnfolderBase]: 1419/2309 cut-off events. [2024-06-14 12:30:42,575 INFO L125 PetriNetUnfolderBase]: For 20048/20050 co-relation queries the response was YES. [2024-06-14 12:30:42,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9950 conditions, 2309 events. 1419/2309 cut-off events. For 20048/20050 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11766 event pairs, 487 based on Foata normal form. 4/2298 useless extension candidates. Maximal degree in co-relation 9915. Up to 2072 conditions per place. [2024-06-14 12:30:42,589 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-14 12:30:42,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 916 flow [2024-06-14 12:30:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:30:42,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:30:42,591 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 616 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:30:42,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 916 flow [2024-06-14 12:30:42,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 848 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:42,605 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 613 flow [2024-06-14 12:30:42,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-06-14 12:30:42,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 12:30:42,606 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 613 flow [2024-06-14 12:30:42,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:42,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:42,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:30:42,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:42,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 451051778, now seen corresponding path program 1 times [2024-06-14 12:30:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:42,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044379127] [2024-06-14 12:30:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044379127] [2024-06-14 12:30:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044379127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:43,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:30:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476107530] [2024-06-14 12:30:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:30:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:30:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:30:43,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:43,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 613 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:43,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:43,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:43,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:43,672 INFO L124 PetriNetUnfolderBase]: 1303/2186 cut-off events. [2024-06-14 12:30:43,673 INFO L125 PetriNetUnfolderBase]: For 21946/21956 co-relation queries the response was YES. [2024-06-14 12:30:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9635 conditions, 2186 events. 1303/2186 cut-off events. For 21946/21956 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11569 event pairs, 517 based on Foata normal form. 9/2178 useless extension candidates. Maximal degree in co-relation 9599. Up to 1934 conditions per place. [2024-06-14 12:30:43,685 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 79 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2024-06-14 12:30:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 831 flow [2024-06-14 12:30:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:30:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:30:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-14 12:30:43,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:30:43,686 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 613 flow. Second operand 5 states and 96 transitions. [2024-06-14 12:30:43,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 831 flow [2024-06-14 12:30:43,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 101 transitions, 784 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:43,702 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 614 flow [2024-06-14 12:30:43,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=614, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-14 12:30:43,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 12:30:43,703 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 614 flow [2024-06-14 12:30:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:43,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:43,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:43,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:30:43,704 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:43,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 670699651, now seen corresponding path program 1 times [2024-06-14 12:30:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933427110] [2024-06-14 12:30:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:44,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:44,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933427110] [2024-06-14 12:30:44,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933427110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:44,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:44,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:44,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938479317] [2024-06-14 12:30:44,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:44,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:44,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 614 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:44,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:44,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:44,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:45,308 INFO L124 PetriNetUnfolderBase]: 1645/2565 cut-off events. [2024-06-14 12:30:45,308 INFO L125 PetriNetUnfolderBase]: For 29517/29521 co-relation queries the response was YES. [2024-06-14 12:30:45,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11928 conditions, 2565 events. 1645/2565 cut-off events. For 29517/29521 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12597 event pairs, 600 based on Foata normal form. 8/2572 useless extension candidates. Maximal degree in co-relation 11891. Up to 2345 conditions per place. [2024-06-14 12:30:45,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 29 changer transitions 0/126 dead transitions. [2024-06-14 12:30:45,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 988 flow [2024-06-14 12:30:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:30:45,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:30:45,324 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 614 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:30:45,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 988 flow [2024-06-14 12:30:45,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 962 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:45,339 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 697 flow [2024-06-14 12:30:45,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-06-14 12:30:45,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-14 12:30:45,340 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 697 flow [2024-06-14 12:30:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:45,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:45,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:30:45,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1023550647, now seen corresponding path program 2 times [2024-06-14 12:30:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791829752] [2024-06-14 12:30:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:45,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:46,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791829752] [2024-06-14 12:30:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791829752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:46,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742049383] [2024-06-14 12:30:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:46,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:46,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 697 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:46,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:46,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:46,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:47,137 INFO L124 PetriNetUnfolderBase]: 1699/2655 cut-off events. [2024-06-14 12:30:47,137 INFO L125 PetriNetUnfolderBase]: For 34881/34883 co-relation queries the response was YES. [2024-06-14 12:30:47,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13032 conditions, 2655 events. 1699/2655 cut-off events. For 34881/34883 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13187 event pairs, 542 based on Foata normal form. 4/2657 useless extension candidates. Maximal degree in co-relation 12994. Up to 2205 conditions per place. [2024-06-14 12:30:47,155 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 55 changer transitions 0/138 dead transitions. [2024-06-14 12:30:47,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 1305 flow [2024-06-14 12:30:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:30:47,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:30:47,157 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 697 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:30:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 1305 flow [2024-06-14 12:30:47,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1222 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:47,180 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 864 flow [2024-06-14 12:30:47,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-14 12:30:47,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 12:30:47,181 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 864 flow [2024-06-14 12:30:47,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:47,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:47,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:47,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:30:47,182 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:47,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:47,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1023545067, now seen corresponding path program 3 times [2024-06-14 12:30:47,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:47,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802298363] [2024-06-14 12:30:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:47,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:48,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:48,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802298363] [2024-06-14 12:30:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802298363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:48,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:48,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614795916] [2024-06-14 12:30:48,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:48,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:48,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:48,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:48,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 864 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:48,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:48,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:48,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:48,876 INFO L124 PetriNetUnfolderBase]: 1689/2641 cut-off events. [2024-06-14 12:30:48,877 INFO L125 PetriNetUnfolderBase]: For 39363/39365 co-relation queries the response was YES. [2024-06-14 12:30:48,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13464 conditions, 2641 events. 1689/2641 cut-off events. For 39363/39365 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13087 event pairs, 547 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 13425. Up to 2197 conditions per place. [2024-06-14 12:30:48,892 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 53 changer transitions 0/137 dead transitions. [2024-06-14 12:30:48,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 1284 flow [2024-06-14 12:30:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:30:48,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:30:48,894 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 864 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:30:48,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 1284 flow [2024-06-14 12:30:48,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1196 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:48,929 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 890 flow [2024-06-14 12:30:48,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=890, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-06-14 12:30:48,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 12:30:48,930 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 890 flow [2024-06-14 12:30:48,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:48,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:48,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:48,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:30:48,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:48,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:48,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1707661711, now seen corresponding path program 4 times [2024-06-14 12:30:48,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:48,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147817044] [2024-06-14 12:30:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147817044] [2024-06-14 12:30:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147817044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:49,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708379136] [2024-06-14 12:30:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:50,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:50,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:50,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:50,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:50,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:50,739 INFO L124 PetriNetUnfolderBase]: 1743/2728 cut-off events. [2024-06-14 12:30:50,739 INFO L125 PetriNetUnfolderBase]: For 44728/44732 co-relation queries the response was YES. [2024-06-14 12:30:50,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14336 conditions, 2728 events. 1743/2728 cut-off events. For 44728/44732 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13587 event pairs, 545 based on Foata normal form. 4/2730 useless extension candidates. Maximal degree in co-relation 14295. Up to 2243 conditions per place. [2024-06-14 12:30:50,756 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 59 changer transitions 0/142 dead transitions. [2024-06-14 12:30:50,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1498 flow [2024-06-14 12:30:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:30:50,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:30:50,758 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 890 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:30:50,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1498 flow [2024-06-14 12:30:50,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 1361 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:50,780 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 987 flow [2024-06-14 12:30:50,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-14 12:30:50,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 12:30:50,780 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 987 flow [2024-06-14 12:30:50,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:50,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:50,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:50,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:30:50,782 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:50,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash 116744881, now seen corresponding path program 5 times [2024-06-14 12:30:50,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:50,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975197040] [2024-06-14 12:30:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:50,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:51,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:51,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975197040] [2024-06-14 12:30:51,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975197040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:51,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:51,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880533664] [2024-06-14 12:30:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:51,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:51,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:51,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:51,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 987 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:51,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:51,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:51,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:52,631 INFO L124 PetriNetUnfolderBase]: 1733/2714 cut-off events. [2024-06-14 12:30:52,631 INFO L125 PetriNetUnfolderBase]: For 47714/47718 co-relation queries the response was YES. [2024-06-14 12:30:52,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14363 conditions, 2714 events. 1733/2714 cut-off events. For 47714/47718 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13502 event pairs, 550 based on Foata normal form. 4/2716 useless extension candidates. Maximal degree in co-relation 14321. Up to 2235 conditions per place. [2024-06-14 12:30:52,645 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 63 changer transitions 0/139 dead transitions. [2024-06-14 12:30:52,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1409 flow [2024-06-14 12:30:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:30:52,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:30:52,647 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 987 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:30:52,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1409 flow [2024-06-14 12:30:52,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 139 transitions, 1215 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:52,675 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 927 flow [2024-06-14 12:30:52,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-14 12:30:52,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:30:52,675 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 927 flow [2024-06-14 12:30:52,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:52,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:52,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:52,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:30:52,676 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:52,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 109387651, now seen corresponding path program 6 times [2024-06-14 12:30:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:52,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436933305] [2024-06-14 12:30:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:53,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436933305] [2024-06-14 12:30:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436933305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:53,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:53,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876916239] [2024-06-14 12:30:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:53,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:53,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 927 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:53,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:53,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:53,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:54,289 INFO L124 PetriNetUnfolderBase]: 1723/2700 cut-off events. [2024-06-14 12:30:54,289 INFO L125 PetriNetUnfolderBase]: For 49676/49680 co-relation queries the response was YES. [2024-06-14 12:30:54,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14271 conditions, 2700 events. 1723/2700 cut-off events. For 49676/49680 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13431 event pairs, 543 based on Foata normal form. 4/2702 useless extension candidates. Maximal degree in co-relation 14228. Up to 2227 conditions per place. [2024-06-14 12:30:54,306 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 60 changer transitions 0/138 dead transitions. [2024-06-14 12:30:54,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1271 flow [2024-06-14 12:30:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:30:54,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:30:54,308 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 927 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:30:54,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1271 flow [2024-06-14 12:30:54,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1101 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:54,340 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 885 flow [2024-06-14 12:30:54,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=885, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-14 12:30:54,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 12:30:54,340 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 885 flow [2024-06-14 12:30:54,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:54,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:54,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:30:54,341 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:54,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1097704296, now seen corresponding path program 1 times [2024-06-14 12:30:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068693977] [2024-06-14 12:30:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068693977] [2024-06-14 12:30:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068693977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269585910] [2024-06-14 12:30:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:55,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:55,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:55,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:55,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:55,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:55,539 INFO L124 PetriNetUnfolderBase]: 1560/2525 cut-off events. [2024-06-14 12:30:55,539 INFO L125 PetriNetUnfolderBase]: For 52418/52438 co-relation queries the response was YES. [2024-06-14 12:30:55,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13648 conditions, 2525 events. 1560/2525 cut-off events. For 52418/52438 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13103 event pairs, 585 based on Foata normal form. 9/2517 useless extension candidates. Maximal degree in co-relation 13604. Up to 2313 conditions per place. [2024-06-14 12:30:55,555 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 99 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-14 12:30:55,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 123 transitions, 1155 flow [2024-06-14 12:30:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:30:55,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:30:55,557 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 885 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:30:55,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 123 transitions, 1155 flow [2024-06-14 12:30:55,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 123 transitions, 1027 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:55,586 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 815 flow [2024-06-14 12:30:55,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-14 12:30:55,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:30:55,587 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 815 flow [2024-06-14 12:30:55,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:55,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:55,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:30:55,588 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:55,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash 553199696, now seen corresponding path program 1 times [2024-06-14 12:30:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:55,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685419887] [2024-06-14 12:30:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:56,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685419887] [2024-06-14 12:30:56,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685419887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:56,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434752593] [2024-06-14 12:30:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:56,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:56,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:56,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:56,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:57,387 INFO L124 PetriNetUnfolderBase]: 1825/2842 cut-off events. [2024-06-14 12:30:57,387 INFO L125 PetriNetUnfolderBase]: For 67507/67511 co-relation queries the response was YES. [2024-06-14 12:30:57,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15971 conditions, 2842 events. 1825/2842 cut-off events. For 67507/67511 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14213 event pairs, 446 based on Foata normal form. 8/2849 useless extension candidates. Maximal degree in co-relation 15926. Up to 2514 conditions per place. [2024-06-14 12:30:57,405 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 117 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-14 12:30:57,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 1383 flow [2024-06-14 12:30:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:30:57,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:30:57,407 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 815 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:30:57,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 1383 flow [2024-06-14 12:30:57,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1347 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:57,440 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 926 flow [2024-06-14 12:30:57,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=926, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2024-06-14 12:30:57,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 12:30:57,441 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 926 flow [2024-06-14 12:30:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:57,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:57,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:30:57,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:57,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash 556056656, now seen corresponding path program 2 times [2024-06-14 12:30:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:57,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272016256] [2024-06-14 12:30:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:58,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272016256] [2024-06-14 12:30:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272016256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561626508] [2024-06-14 12:30:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:58,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:58,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:58,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:58,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:59,104 INFO L124 PetriNetUnfolderBase]: 1817/2830 cut-off events. [2024-06-14 12:30:59,104 INFO L125 PetriNetUnfolderBase]: For 72856/72860 co-relation queries the response was YES. [2024-06-14 12:30:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16327 conditions, 2830 events. 1817/2830 cut-off events. For 72856/72860 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14115 event pairs, 585 based on Foata normal form. 8/2837 useless extension candidates. Maximal degree in co-relation 16281. Up to 2573 conditions per place. [2024-06-14 12:30:59,121 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 114 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-14 12:30:59,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1306 flow [2024-06-14 12:30:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:30:59,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:30:59,123 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 926 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:30:59,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1306 flow [2024-06-14 12:30:59,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1211 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:59,164 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 895 flow [2024-06-14 12:30:59,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-14 12:30:59,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 12:30:59,165 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 895 flow [2024-06-14 12:30:59,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:59,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:59,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:30:59,165 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:59,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1665122826, now seen corresponding path program 3 times [2024-06-14 12:30:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:59,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516195101] [2024-06-14 12:30:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:59,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:59,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516195101] [2024-06-14 12:30:59,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516195101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:59,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:59,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181921123] [2024-06-14 12:30:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:59,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:00,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:00,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 895 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:00,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:00,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:00,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:00,701 INFO L124 PetriNetUnfolderBase]: 1834/2856 cut-off events. [2024-06-14 12:31:00,702 INFO L125 PetriNetUnfolderBase]: For 78964/78968 co-relation queries the response was YES. [2024-06-14 12:31:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16653 conditions, 2856 events. 1834/2856 cut-off events. For 78964/78968 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14292 event pairs, 593 based on Foata normal form. 6/2861 useless extension candidates. Maximal degree in co-relation 16605. Up to 2555 conditions per place. [2024-06-14 12:31:00,719 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 101 selfloop transitions, 39 changer transitions 0/146 dead transitions. [2024-06-14 12:31:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 146 transitions, 1293 flow [2024-06-14 12:31:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:31:00,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:31:00,721 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 895 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:31:00,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 146 transitions, 1293 flow [2024-06-14 12:31:00,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1230 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:00,761 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 961 flow [2024-06-14 12:31:00,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2024-06-14 12:31:00,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:31:00,762 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 961 flow [2024-06-14 12:31:00,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:00,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:00,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:31:00,763 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:00,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1665307524, now seen corresponding path program 1 times [2024-06-14 12:31:00,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:00,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220560548] [2024-06-14 12:31:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220560548] [2024-06-14 12:31:02,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220560548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:02,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:02,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:02,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978798810] [2024-06-14 12:31:02,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:02,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:02,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:02,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:02,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:02,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:02,819 INFO L124 PetriNetUnfolderBase]: 1851/2886 cut-off events. [2024-06-14 12:31:02,820 INFO L125 PetriNetUnfolderBase]: For 86133/86137 co-relation queries the response was YES. [2024-06-14 12:31:02,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17201 conditions, 2886 events. 1851/2886 cut-off events. For 86133/86137 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14460 event pairs, 537 based on Foata normal form. 8/2892 useless extension candidates. Maximal degree in co-relation 17152. Up to 2577 conditions per place. [2024-06-14 12:31:02,836 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-14 12:31:02,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1387 flow [2024-06-14 12:31:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:31:02,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:31:02,839 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 961 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:31:02,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1387 flow [2024-06-14 12:31:02,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1276 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:02,884 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 959 flow [2024-06-14 12:31:02,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2024-06-14 12:31:02,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 12:31:02,885 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 959 flow [2024-06-14 12:31:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:02,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:02,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:31:02,886 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)] === [2024-06-14 12:31:02,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -342345823, now seen corresponding path program 1 times [2024-06-14 12:31:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191802188] [2024-06-14 12:31:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191802188] [2024-06-14 12:31:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191802188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:03,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:03,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379774975] [2024-06-14 12:31:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:03,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:03,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:03,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 959 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:03,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:03,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:03,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:04,360 INFO L124 PetriNetUnfolderBase]: 1736/2747 cut-off events. [2024-06-14 12:31:04,360 INFO L125 PetriNetUnfolderBase]: For 90518/90538 co-relation queries the response was YES. [2024-06-14 12:31:04,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16901 conditions, 2747 events. 1736/2747 cut-off events. For 90518/90538 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14077 event pairs, 574 based on Foata normal form. 10/2740 useless extension candidates. Maximal degree in co-relation 16851. Up to 2468 conditions per place. [2024-06-14 12:31:04,381 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 103 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-14 12:31:04,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 1277 flow [2024-06-14 12:31:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 12:31:04,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:31:04,383 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 959 flow. Second operand 6 states and 112 transitions. [2024-06-14 12:31:04,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 1277 flow [2024-06-14 12:31:04,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 139 transitions, 1186 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:04,435 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 954 flow [2024-06-14 12:31:04,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=954, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-14 12:31:04,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 12:31:04,436 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 954 flow [2024-06-14 12:31:04,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:04,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:04,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:04,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:31:04,437 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:04,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1278442470, now seen corresponding path program 4 times [2024-06-14 12:31:04,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:04,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651513121] [2024-06-14 12:31:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651513121] [2024-06-14 12:31:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651513121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:05,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96754172] [2024-06-14 12:31:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:05,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:05,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 954 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:05,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:06,162 INFO L124 PetriNetUnfolderBase]: 1878/2912 cut-off events. [2024-06-14 12:31:06,163 INFO L125 PetriNetUnfolderBase]: For 96546/96550 co-relation queries the response was YES. [2024-06-14 12:31:06,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17932 conditions, 2912 events. 1878/2912 cut-off events. For 96546/96550 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14475 event pairs, 601 based on Foata normal form. 4/2914 useless extension candidates. Maximal degree in co-relation 17881. Up to 2609 conditions per place. [2024-06-14 12:31:06,188 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 106 selfloop transitions, 39 changer transitions 0/151 dead transitions. [2024-06-14 12:31:06,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 151 transitions, 1362 flow [2024-06-14 12:31:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:31:06,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:31:06,190 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 954 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:31:06,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 151 transitions, 1362 flow [2024-06-14 12:31:06,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 1306 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:06,244 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1033 flow [2024-06-14 12:31:06,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1033, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2024-06-14 12:31:06,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:31:06,245 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1033 flow [2024-06-14 12:31:06,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:06,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:06,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:06,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:31:06,246 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:06,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:06,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1278627168, now seen corresponding path program 2 times [2024-06-14 12:31:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:06,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473348031] [2024-06-14 12:31:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:07,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:07,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473348031] [2024-06-14 12:31:07,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473348031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:07,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:07,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388789379] [2024-06-14 12:31:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:07,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:07,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1033 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:07,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:07,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:07,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:08,520 INFO L124 PetriNetUnfolderBase]: 1895/2942 cut-off events. [2024-06-14 12:31:08,520 INFO L125 PetriNetUnfolderBase]: For 104246/104252 co-relation queries the response was YES. [2024-06-14 12:31:08,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18518 conditions, 2942 events. 1895/2942 cut-off events. For 104246/104252 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14615 event pairs, 534 based on Foata normal form. 10/2951 useless extension candidates. Maximal degree in co-relation 18466. Up to 2631 conditions per place. [2024-06-14 12:31:08,542 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-14 12:31:08,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1489 flow [2024-06-14 12:31:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:31:08,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:31:08,544 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1033 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:31:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1489 flow [2024-06-14 12:31:08,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1372 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:08,593 INFO L231 Difference]: Finished difference. Result has 119 places, 132 transitions, 1063 flow [2024-06-14 12:31:08,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1063, PETRI_PLACES=119, PETRI_TRANSITIONS=132} [2024-06-14 12:31:08,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 12:31:08,594 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 132 transitions, 1063 flow [2024-06-14 12:31:08,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:08,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:08,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:08,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:31:08,595 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:08,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:08,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1514802528, now seen corresponding path program 3 times [2024-06-14 12:31:08,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:08,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970425066] [2024-06-14 12:31:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:08,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970425066] [2024-06-14 12:31:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970425066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215048249] [2024-06-14 12:31:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:09,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:09,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 132 transitions, 1063 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:09,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:09,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:09,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:10,668 INFO L124 PetriNetUnfolderBase]: 1912/2969 cut-off events. [2024-06-14 12:31:10,668 INFO L125 PetriNetUnfolderBase]: For 111369/111375 co-relation queries the response was YES. [2024-06-14 12:31:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18990 conditions, 2969 events. 1912/2969 cut-off events. For 111369/111375 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14805 event pairs, 539 based on Foata normal form. 10/2978 useless extension candidates. Maximal degree in co-relation 18936. Up to 2658 conditions per place. [2024-06-14 12:31:10,689 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 121 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-14 12:31:10,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 160 transitions, 1495 flow [2024-06-14 12:31:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:31:10,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:31:10,691 INFO L175 Difference]: Start difference. First operand has 119 places, 132 transitions, 1063 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:31:10,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 160 transitions, 1495 flow [2024-06-14 12:31:10,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1404 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:10,757 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1095 flow [2024-06-14 12:31:10,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-14 12:31:10,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 12:31:10,758 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1095 flow [2024-06-14 12:31:10,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:10,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:10,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:10,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:31:10,758 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:10,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash -667296566, now seen corresponding path program 4 times [2024-06-14 12:31:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:10,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746774555] [2024-06-14 12:31:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:10,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:11,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:11,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746774555] [2024-06-14 12:31:11,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746774555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:11,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884479997] [2024-06-14 12:31:11,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:11,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:11,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:11,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:12,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:12,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1095 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:12,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:12,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:12,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:12,714 INFO L124 PetriNetUnfolderBase]: 1904/2957 cut-off events. [2024-06-14 12:31:12,715 INFO L125 PetriNetUnfolderBase]: For 116885/116891 co-relation queries the response was YES. [2024-06-14 12:31:12,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19124 conditions, 2957 events. 1904/2957 cut-off events. For 116885/116891 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14749 event pairs, 499 based on Foata normal form. 10/2966 useless extension candidates. Maximal degree in co-relation 19068. Up to 2569 conditions per place. [2024-06-14 12:31:12,735 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 40 changer transitions 0/162 dead transitions. [2024-06-14 12:31:12,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1535 flow [2024-06-14 12:31:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:31:12,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:31:12,754 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1095 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:31:12,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1535 flow [2024-06-14 12:31:12,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 162 transitions, 1430 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:12,809 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1131 flow [2024-06-14 12:31:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1131, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2024-06-14 12:31:12,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 12:31:12,810 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1131 flow [2024-06-14 12:31:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:12,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:31:12,810 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:12,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash -330917983, now seen corresponding path program 2 times [2024-06-14 12:31:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928969068] [2024-06-14 12:31:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928969068] [2024-06-14 12:31:13,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928969068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:13,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:13,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:13,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905845504] [2024-06-14 12:31:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:13,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:13,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:13,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:13,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:13,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1131 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:13,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:13,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:14,055 INFO L124 PetriNetUnfolderBase]: 1738/2751 cut-off events. [2024-06-14 12:31:14,055 INFO L125 PetriNetUnfolderBase]: For 120569/120587 co-relation queries the response was YES. [2024-06-14 12:31:14,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18210 conditions, 2751 events. 1738/2751 cut-off events. For 120569/120587 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14158 event pairs, 579 based on Foata normal form. 9/2737 useless extension candidates. Maximal degree in co-relation 18153. Up to 2469 conditions per place. [2024-06-14 12:31:14,077 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 102 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-14 12:31:14,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 147 transitions, 1443 flow [2024-06-14 12:31:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:31:14,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:31:14,078 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1131 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:31:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 147 transitions, 1443 flow [2024-06-14 12:31:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 1320 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:14,144 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1106 flow [2024-06-14 12:31:14,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-14 12:31:14,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 12:31:14,144 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1106 flow [2024-06-14 12:31:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:14,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:14,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:31:14,145 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:14,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1578555395, now seen corresponding path program 1 times [2024-06-14 12:31:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:14,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525773033] [2024-06-14 12:31:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:14,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525773033] [2024-06-14 12:31:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525773033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:14,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251668537] [2024-06-14 12:31:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:14,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:14,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1106 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:14,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:14,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:14,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:15,423 INFO L124 PetriNetUnfolderBase]: 1696/2726 cut-off events. [2024-06-14 12:31:15,423 INFO L125 PetriNetUnfolderBase]: For 110261/110261 co-relation queries the response was YES. [2024-06-14 12:31:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17595 conditions, 2726 events. 1696/2726 cut-off events. For 110261/110261 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14019 event pairs, 511 based on Foata normal form. 1/2726 useless extension candidates. Maximal degree in co-relation 17537. Up to 2483 conditions per place. [2024-06-14 12:31:15,445 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-06-14 12:31:15,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1468 flow [2024-06-14 12:31:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:31:15,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 12:31:15,446 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1106 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:31:15,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1468 flow [2024-06-14 12:31:15,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 153 transitions, 1392 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:15,494 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1102 flow [2024-06-14 12:31:15,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1102, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2024-06-14 12:31:15,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 12:31:15,494 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1102 flow [2024-06-14 12:31:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:15,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:15,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:31:15,495 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:15,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash 583373759, now seen corresponding path program 2 times [2024-06-14 12:31:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358875543] [2024-06-14 12:31:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:16,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:16,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358875543] [2024-06-14 12:31:16,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358875543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:16,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:16,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:31:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368870811] [2024-06-14 12:31:16,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:16,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:31:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:31:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:31:16,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:16,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1102 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:16,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:16,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:16,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:16,677 INFO L124 PetriNetUnfolderBase]: 1693/2723 cut-off events. [2024-06-14 12:31:16,678 INFO L125 PetriNetUnfolderBase]: For 115622/115624 co-relation queries the response was YES. [2024-06-14 12:31:16,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17895 conditions, 2723 events. 1693/2723 cut-off events. For 115622/115624 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14034 event pairs, 515 based on Foata normal form. 3/2725 useless extension candidates. Maximal degree in co-relation 17836. Up to 2473 conditions per place. [2024-06-14 12:31:16,705 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 130 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-14 12:31:16,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 153 transitions, 1460 flow [2024-06-14 12:31:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:31:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:31:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:31:16,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:31:16,706 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1102 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:31:16,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 153 transitions, 1460 flow [2024-06-14 12:31:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 153 transitions, 1410 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:16,776 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 1140 flow [2024-06-14 12:31:16,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1140, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2024-06-14 12:31:16,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 12:31:16,777 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 1140 flow [2024-06-14 12:31:16,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:16,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:16,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:16,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:31:16,778 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:16,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 583381695, now seen corresponding path program 1 times [2024-06-14 12:31:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46069758] [2024-06-14 12:31:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46069758] [2024-06-14 12:31:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46069758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:17,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740905684] [2024-06-14 12:31:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:17,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:17,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 1140 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:17,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:17,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:17,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:18,177 INFO L124 PetriNetUnfolderBase]: 1660/2662 cut-off events. [2024-06-14 12:31:18,177 INFO L125 PetriNetUnfolderBase]: For 119551/119569 co-relation queries the response was YES. [2024-06-14 12:31:18,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17921 conditions, 2662 events. 1660/2662 cut-off events. For 119551/119569 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13758 event pairs, 538 based on Foata normal form. 9/2654 useless extension candidates. Maximal degree in co-relation 17861. Up to 2421 conditions per place. [2024-06-14 12:31:18,194 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 125 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-14 12:31:18,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 1478 flow [2024-06-14 12:31:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:31:18,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:31:18,196 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 1140 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:31:18,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 1478 flow [2024-06-14 12:31:18,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 157 transitions, 1412 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:18,258 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1150 flow [2024-06-14 12:31:18,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1150, PETRI_PLACES=131, PETRI_TRANSITIONS=148} [2024-06-14 12:31:18,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 12:31:18,259 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1150 flow [2024-06-14 12:31:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:18,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:31:18,260 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:18,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -30676858, now seen corresponding path program 1 times [2024-06-14 12:31:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:18,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421224948] [2024-06-14 12:31:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:19,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421224948] [2024-06-14 12:31:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421224948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:19,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247516808] [2024-06-14 12:31:19,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:19,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:19,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 148 transitions, 1150 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:19,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:19,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:19,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:19,840 INFO L124 PetriNetUnfolderBase]: 2076/3222 cut-off events. [2024-06-14 12:31:19,841 INFO L125 PetriNetUnfolderBase]: For 173152/173156 co-relation queries the response was YES. [2024-06-14 12:31:19,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23230 conditions, 3222 events. 2076/3222 cut-off events. For 173152/173156 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16461 event pairs, 511 based on Foata normal form. 20/3235 useless extension candidates. Maximal degree in co-relation 23169. Up to 2619 conditions per place. [2024-06-14 12:31:19,872 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 35 changer transitions 0/198 dead transitions. [2024-06-14 12:31:19,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 198 transitions, 1904 flow [2024-06-14 12:31:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:31:19,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 12:31:19,874 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1150 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:31:19,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 198 transitions, 1904 flow [2024-06-14 12:31:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 198 transitions, 1850 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:19,957 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1254 flow [2024-06-14 12:31:19,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-14 12:31:19,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 12:31:19,958 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1254 flow [2024-06-14 12:31:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:19,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:19,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:31:19,958 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:19,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1711974660, now seen corresponding path program 2 times [2024-06-14 12:31:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687213789] [2024-06-14 12:31:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:20,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:20,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687213789] [2024-06-14 12:31:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687213789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:20,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385316426] [2024-06-14 12:31:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:20,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:21,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:21,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:21,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:21,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:21,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:21,890 INFO L124 PetriNetUnfolderBase]: 2134/3328 cut-off events. [2024-06-14 12:31:21,890 INFO L125 PetriNetUnfolderBase]: For 184544/184548 co-relation queries the response was YES. [2024-06-14 12:31:21,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24216 conditions, 3328 events. 2134/3328 cut-off events. For 184544/184548 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17151 event pairs, 648 based on Foata normal form. 20/3345 useless extension candidates. Maximal degree in co-relation 24154. Up to 2792 conditions per place. [2024-06-14 12:31:21,917 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-14 12:31:21,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 1952 flow [2024-06-14 12:31:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:31:21,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:31:21,919 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1254 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:31:21,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 1952 flow [2024-06-14 12:31:22,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1879 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:22,034 INFO L231 Difference]: Finished difference. Result has 139 places, 151 transitions, 1293 flow [2024-06-14 12:31:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=139, PETRI_TRANSITIONS=151} [2024-06-14 12:31:22,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 12:31:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 151 transitions, 1293 flow [2024-06-14 12:31:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:22,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:31:22,036 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1461541426, now seen corresponding path program 3 times [2024-06-14 12:31:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148002904] [2024-06-14 12:31:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:23,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148002904] [2024-06-14 12:31:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148002904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:23,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008819434] [2024-06-14 12:31:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:23,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:23,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:23,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 151 transitions, 1293 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:23,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:24,008 INFO L124 PetriNetUnfolderBase]: 2098/3272 cut-off events. [2024-06-14 12:31:24,009 INFO L125 PetriNetUnfolderBase]: For 184193/184197 co-relation queries the response was YES. [2024-06-14 12:31:24,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23295 conditions, 3272 events. 2098/3272 cut-off events. For 184193/184197 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16774 event pairs, 650 based on Foata normal form. 24/3293 useless extension candidates. Maximal degree in co-relation 23231. Up to 2897 conditions per place. [2024-06-14 12:31:24,034 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 31 changer transitions 0/188 dead transitions. [2024-06-14 12:31:24,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 188 transitions, 1787 flow [2024-06-14 12:31:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:31:24,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:31:24,036 INFO L175 Difference]: Start difference. First operand has 139 places, 151 transitions, 1293 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:31:24,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 188 transitions, 1787 flow [2024-06-14 12:31:24,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 188 transitions, 1672 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:24,172 INFO L231 Difference]: Finished difference. Result has 141 places, 151 transitions, 1247 flow [2024-06-14 12:31:24,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1247, PETRI_PLACES=141, PETRI_TRANSITIONS=151} [2024-06-14 12:31:24,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 12:31:24,172 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 151 transitions, 1247 flow [2024-06-14 12:31:24,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:24,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:24,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:31:24,173 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:24,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 84712054, now seen corresponding path program 4 times [2024-06-14 12:31:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:24,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132387521] [2024-06-14 12:31:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:24,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:25,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:25,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132387521] [2024-06-14 12:31:25,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132387521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:25,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:25,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215411942] [2024-06-14 12:31:25,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:25,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:25,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 151 transitions, 1247 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:25,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:25,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:25,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:26,101 INFO L124 PetriNetUnfolderBase]: 2173/3411 cut-off events. [2024-06-14 12:31:26,101 INFO L125 PetriNetUnfolderBase]: For 191634/191634 co-relation queries the response was YES. [2024-06-14 12:31:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23893 conditions, 3411 events. 2173/3411 cut-off events. For 191634/191634 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17755 event pairs, 582 based on Foata normal form. 20/3429 useless extension candidates. Maximal degree in co-relation 23828. Up to 2790 conditions per place. [2024-06-14 12:31:26,131 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 121 selfloop transitions, 62 changer transitions 0/189 dead transitions. [2024-06-14 12:31:26,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 189 transitions, 1779 flow [2024-06-14 12:31:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:31:26,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:31:26,133 INFO L175 Difference]: Start difference. First operand has 141 places, 151 transitions, 1247 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:31:26,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 189 transitions, 1779 flow [2024-06-14 12:31:26,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 189 transitions, 1711 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:26,275 INFO L231 Difference]: Finished difference. Result has 142 places, 152 transitions, 1354 flow [2024-06-14 12:31:26,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1354, PETRI_PLACES=142, PETRI_TRANSITIONS=152} [2024-06-14 12:31:26,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 12:31:26,275 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 152 transitions, 1354 flow [2024-06-14 12:31:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:26,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:26,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:26,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:31:26,276 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:26,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash 79349674, now seen corresponding path program 5 times [2024-06-14 12:31:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:26,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125104035] [2024-06-14 12:31:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125104035] [2024-06-14 12:31:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125104035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:27,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:27,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306962397] [2024-06-14 12:31:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:27,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:27,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 152 transitions, 1354 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:28,165 INFO L124 PetriNetUnfolderBase]: 2248/3536 cut-off events. [2024-06-14 12:31:28,165 INFO L125 PetriNetUnfolderBase]: For 206241/206241 co-relation queries the response was YES. [2024-06-14 12:31:28,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25114 conditions, 3536 events. 2248/3536 cut-off events. For 206241/206241 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18639 event pairs, 606 based on Foata normal form. 20/3554 useless extension candidates. Maximal degree in co-relation 25048. Up to 2915 conditions per place. [2024-06-14 12:31:28,194 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 125 selfloop transitions, 60 changer transitions 0/191 dead transitions. [2024-06-14 12:31:28,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 191 transitions, 1894 flow [2024-06-14 12:31:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:31:28,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 12:31:28,196 INFO L175 Difference]: Start difference. First operand has 142 places, 152 transitions, 1354 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:31:28,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 191 transitions, 1894 flow [2024-06-14 12:31:28,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 1747 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:28,345 INFO L231 Difference]: Finished difference. Result has 144 places, 153 transitions, 1380 flow [2024-06-14 12:31:28,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1380, PETRI_PLACES=144, PETRI_TRANSITIONS=153} [2024-06-14 12:31:28,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 12:31:28,346 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 153 transitions, 1380 flow [2024-06-14 12:31:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:28,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:28,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:28,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:31:28,347 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:28,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 79201804, now seen corresponding path program 6 times [2024-06-14 12:31:28,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815242629] [2024-06-14 12:31:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:28,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:29,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:29,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815242629] [2024-06-14 12:31:29,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815242629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:29,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:29,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:29,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218997307] [2024-06-14 12:31:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:29,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:29,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:29,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:29,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 153 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:29,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:29,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:29,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:30,219 INFO L124 PetriNetUnfolderBase]: 2306/3634 cut-off events. [2024-06-14 12:31:30,220 INFO L125 PetriNetUnfolderBase]: For 213467/213467 co-relation queries the response was YES. [2024-06-14 12:31:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25745 conditions, 3634 events. 2306/3634 cut-off events. For 213467/213467 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19360 event pairs, 592 based on Foata normal form. 16/3648 useless extension candidates. Maximal degree in co-relation 25678. Up to 2783 conditions per place. [2024-06-14 12:31:30,248 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 126 selfloop transitions, 63 changer transitions 0/195 dead transitions. [2024-06-14 12:31:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 195 transitions, 1944 flow [2024-06-14 12:31:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:31:30,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:31:30,250 INFO L175 Difference]: Start difference. First operand has 144 places, 153 transitions, 1380 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:31:30,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 195 transitions, 1944 flow [2024-06-14 12:31:30,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 195 transitions, 1799 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:30,426 INFO L231 Difference]: Finished difference. Result has 146 places, 154 transitions, 1415 flow [2024-06-14 12:31:30,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1415, PETRI_PLACES=146, PETRI_TRANSITIONS=154} [2024-06-14 12:31:30,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 12:31:30,426 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 154 transitions, 1415 flow [2024-06-14 12:31:30,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:30,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:30,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:30,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:31:30,427 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:30,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash 84927256, now seen corresponding path program 1 times [2024-06-14 12:31:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:30,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885746886] [2024-06-14 12:31:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:30,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:31,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:31,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885746886] [2024-06-14 12:31:31,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885746886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:31,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:31,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:31,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683009753] [2024-06-14 12:31:31,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:31,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:31,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:31,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:31,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 154 transitions, 1415 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:31,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:31,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:31,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:32,660 INFO L124 PetriNetUnfolderBase]: 2347/3700 cut-off events. [2024-06-14 12:31:32,661 INFO L125 PetriNetUnfolderBase]: For 220571/220571 co-relation queries the response was YES. [2024-06-14 12:31:32,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26296 conditions, 3700 events. 2347/3700 cut-off events. For 220571/220571 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19854 event pairs, 608 based on Foata normal form. 12/3710 useless extension candidates. Maximal degree in co-relation 26228. Up to 2757 conditions per place. [2024-06-14 12:31:32,693 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 122 selfloop transitions, 66 changer transitions 0/194 dead transitions. [2024-06-14 12:31:32,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 194 transitions, 1981 flow [2024-06-14 12:31:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:31:32,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:31:32,695 INFO L175 Difference]: Start difference. First operand has 146 places, 154 transitions, 1415 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:31:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 194 transitions, 1981 flow [2024-06-14 12:31:32,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 194 transitions, 1821 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:32,848 INFO L231 Difference]: Finished difference. Result has 148 places, 155 transitions, 1443 flow [2024-06-14 12:31:32,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1443, PETRI_PLACES=148, PETRI_TRANSITIONS=155} [2024-06-14 12:31:32,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 12:31:32,849 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 155 transitions, 1443 flow [2024-06-14 12:31:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:32,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:32,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:32,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:31:32,850 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:32,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2022784855, now seen corresponding path program 1 times [2024-06-14 12:31:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:32,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88156407] [2024-06-14 12:31:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:32,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88156407] [2024-06-14 12:31:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88156407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:33,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:33,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:33,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157284875] [2024-06-14 12:31:33,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:33,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:33,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 155 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:33,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:33,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:33,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:34,276 INFO L124 PetriNetUnfolderBase]: 2283/3609 cut-off events. [2024-06-14 12:31:34,276 INFO L125 PetriNetUnfolderBase]: For 218044/218062 co-relation queries the response was YES. [2024-06-14 12:31:34,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25797 conditions, 3609 events. 2283/3609 cut-off events. For 218044/218062 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19553 event pairs, 737 based on Foata normal form. 10/3595 useless extension candidates. Maximal degree in co-relation 25728. Up to 3394 conditions per place. [2024-06-14 12:31:34,353 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 131 selfloop transitions, 24 changer transitions 0/172 dead transitions. [2024-06-14 12:31:34,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 172 transitions, 1831 flow [2024-06-14 12:31:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:31:34,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 12:31:34,355 INFO L175 Difference]: Start difference. First operand has 148 places, 155 transitions, 1443 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:31:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 172 transitions, 1831 flow [2024-06-14 12:31:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 172 transitions, 1665 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:34,472 INFO L231 Difference]: Finished difference. Result has 148 places, 158 transitions, 1375 flow [2024-06-14 12:31:34,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1375, PETRI_PLACES=148, PETRI_TRANSITIONS=158} [2024-06-14 12:31:34,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 12:31:34,473 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 158 transitions, 1375 flow [2024-06-14 12:31:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:31:34,473 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)] === [2024-06-14 12:31:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1188013620, now seen corresponding path program 7 times [2024-06-14 12:31:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099226467] [2024-06-14 12:31:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:35,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099226467] [2024-06-14 12:31:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099226467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:35,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:35,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297113372] [2024-06-14 12:31:35,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:35,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:35,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:35,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:35,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 158 transitions, 1375 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:36,404 INFO L124 PetriNetUnfolderBase]: 2442/3866 cut-off events. [2024-06-14 12:31:36,405 INFO L125 PetriNetUnfolderBase]: For 245329/245329 co-relation queries the response was YES. [2024-06-14 12:31:36,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27479 conditions, 3866 events. 2442/3866 cut-off events. For 245329/245329 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21073 event pairs, 634 based on Foata normal form. 20/3885 useless extension candidates. Maximal degree in co-relation 27409. Up to 3231 conditions per place. [2024-06-14 12:31:36,451 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 60 changer transitions 0/194 dead transitions. [2024-06-14 12:31:36,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 194 transitions, 1919 flow [2024-06-14 12:31:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:31:36,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:31:36,455 INFO L175 Difference]: Start difference. First operand has 148 places, 158 transitions, 1375 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:31:36,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 194 transitions, 1919 flow [2024-06-14 12:31:36,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 194 transitions, 1843 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:36,622 INFO L231 Difference]: Finished difference. Result has 152 places, 159 transitions, 1478 flow [2024-06-14 12:31:36,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1478, PETRI_PLACES=152, PETRI_TRANSITIONS=159} [2024-06-14 12:31:36,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 12:31:36,624 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 159 transitions, 1478 flow [2024-06-14 12:31:36,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:36,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:36,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:36,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:31:36,625 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:36,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2042368578, now seen corresponding path program 8 times [2024-06-14 12:31:36,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326543293] [2024-06-14 12:31:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:37,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:37,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326543293] [2024-06-14 12:31:37,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326543293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:37,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:37,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481523912] [2024-06-14 12:31:37,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:37,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:37,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 159 transitions, 1478 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:37,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:37,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:38,599 INFO L124 PetriNetUnfolderBase]: 2517/3991 cut-off events. [2024-06-14 12:31:38,599 INFO L125 PetriNetUnfolderBase]: For 263524/263524 co-relation queries the response was YES. [2024-06-14 12:31:38,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 3991 events. 2517/3991 cut-off events. For 263524/263524 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21980 event pairs, 658 based on Foata normal form. 20/4010 useless extension candidates. Maximal degree in co-relation 28747. Up to 3356 conditions per place. [2024-06-14 12:31:38,629 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 61 changer transitions 0/195 dead transitions. [2024-06-14 12:31:38,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 195 transitions, 2026 flow [2024-06-14 12:31:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:31:38,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:31:38,632 INFO L175 Difference]: Start difference. First operand has 152 places, 159 transitions, 1478 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:31:38,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 195 transitions, 2026 flow [2024-06-14 12:31:38,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 1875 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:38,815 INFO L231 Difference]: Finished difference. Result has 154 places, 160 transitions, 1510 flow [2024-06-14 12:31:38,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1510, PETRI_PLACES=154, PETRI_TRANSITIONS=160} [2024-06-14 12:31:38,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 12:31:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 160 transitions, 1510 flow [2024-06-14 12:31:38,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:38,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:38,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:31:38,816 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 977012656, now seen corresponding path program 9 times [2024-06-14 12:31:38,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:38,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852635387] [2024-06-14 12:31:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:39,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852635387] [2024-06-14 12:31:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852635387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:39,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:39,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132253058] [2024-06-14 12:31:39,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:39,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:39,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:39,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 160 transitions, 1510 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:39,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:39,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:39,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:40,782 INFO L124 PetriNetUnfolderBase]: 2636/4192 cut-off events. [2024-06-14 12:31:40,782 INFO L125 PetriNetUnfolderBase]: For 285189/285189 co-relation queries the response was YES. [2024-06-14 12:31:40,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30749 conditions, 4192 events. 2636/4192 cut-off events. For 285189/285189 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23514 event pairs, 668 based on Foata normal form. 16/4207 useless extension candidates. Maximal degree in co-relation 30677. Up to 3161 conditions per place. [2024-06-14 12:31:40,823 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 130 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-14 12:31:40,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 202 transitions, 2310 flow [2024-06-14 12:31:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:31:40,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:31:40,826 INFO L175 Difference]: Start difference. First operand has 154 places, 160 transitions, 1510 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:31:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 202 transitions, 2310 flow [2024-06-14 12:31:41,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 202 transitions, 2155 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:41,097 INFO L231 Difference]: Finished difference. Result has 156 places, 162 transitions, 1601 flow [2024-06-14 12:31:41,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1601, PETRI_PLACES=156, PETRI_TRANSITIONS=162} [2024-06-14 12:31:41,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:31:41,098 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 162 transitions, 1601 flow [2024-06-14 12:31:41,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:41,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:41,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:31:41,102 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:41,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -542476036, now seen corresponding path program 10 times [2024-06-14 12:31:41,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:41,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078758169] [2024-06-14 12:31:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:41,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:42,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078758169] [2024-06-14 12:31:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078758169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:42,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:42,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887906536] [2024-06-14 12:31:42,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:42,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:42,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 162 transitions, 1601 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:42,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:42,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:42,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:43,289 INFO L124 PetriNetUnfolderBase]: 2600/4136 cut-off events. [2024-06-14 12:31:43,289 INFO L125 PetriNetUnfolderBase]: For 277400/277400 co-relation queries the response was YES. [2024-06-14 12:31:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29479 conditions, 4136 events. 2600/4136 cut-off events. For 277400/277400 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23130 event pairs, 675 based on Foata normal form. 20/4155 useless extension candidates. Maximal degree in co-relation 29406. Up to 3501 conditions per place. [2024-06-14 12:31:43,321 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 125 selfloop transitions, 64 changer transitions 0/196 dead transitions. [2024-06-14 12:31:43,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 196 transitions, 2097 flow [2024-06-14 12:31:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:31:43,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:31:43,323 INFO L175 Difference]: Start difference. First operand has 156 places, 162 transitions, 1601 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:31:43,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 196 transitions, 2097 flow [2024-06-14 12:31:43,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 1950 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:43,610 INFO L231 Difference]: Finished difference. Result has 160 places, 162 transitions, 1589 flow [2024-06-14 12:31:43,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=160, PETRI_TRANSITIONS=162} [2024-06-14 12:31:43,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:31:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 162 transitions, 1589 flow [2024-06-14 12:31:43,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:31:43,612 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:43,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 982738108, now seen corresponding path program 2 times [2024-06-14 12:31:43,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:43,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773761526] [2024-06-14 12:31:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:44,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773761526] [2024-06-14 12:31:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773761526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:44,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873574258] [2024-06-14 12:31:44,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:44,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:44,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 162 transitions, 1589 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:44,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:44,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:44,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:45,897 INFO L124 PetriNetUnfolderBase]: 2641/4217 cut-off events. [2024-06-14 12:31:45,897 INFO L125 PetriNetUnfolderBase]: For 273466/273466 co-relation queries the response was YES. [2024-06-14 12:31:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29869 conditions, 4217 events. 2641/4217 cut-off events. For 273466/273466 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23834 event pairs, 675 based on Foata normal form. 12/4228 useless extension candidates. Maximal degree in co-relation 29794. Up to 3365 conditions per place. [2024-06-14 12:31:45,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 130 selfloop transitions, 63 changer transitions 0/200 dead transitions. [2024-06-14 12:31:45,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 200 transitions, 2171 flow [2024-06-14 12:31:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:31:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:31:45,933 INFO L175 Difference]: Start difference. First operand has 160 places, 162 transitions, 1589 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:31:45,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 200 transitions, 2171 flow [2024-06-14 12:31:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 200 transitions, 2028 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:46,270 INFO L231 Difference]: Finished difference. Result has 161 places, 163 transitions, 1636 flow [2024-06-14 12:31:46,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1636, PETRI_PLACES=161, PETRI_TRANSITIONS=163} [2024-06-14 12:31:46,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:31:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 163 transitions, 1636 flow [2024-06-14 12:31:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:46,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:31:46,272 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:46,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 530097058, now seen corresponding path program 3 times [2024-06-14 12:31:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:46,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127521926] [2024-06-14 12:31:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:47,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127521926] [2024-06-14 12:31:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127521926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:47,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918001341] [2024-06-14 12:31:47,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:47,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:47,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:47,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:47,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 163 transitions, 1636 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:47,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:47,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:47,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:48,596 INFO L124 PetriNetUnfolderBase]: 2682/4298 cut-off events. [2024-06-14 12:31:48,596 INFO L125 PetriNetUnfolderBase]: For 288478/288478 co-relation queries the response was YES. [2024-06-14 12:31:48,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30622 conditions, 4298 events. 2682/4298 cut-off events. For 288478/288478 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24557 event pairs, 690 based on Foata normal form. 12/4309 useless extension candidates. Maximal degree in co-relation 30546. Up to 3556 conditions per place. [2024-06-14 12:31:48,632 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 66 changer transitions 0/200 dead transitions. [2024-06-14 12:31:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 200 transitions, 2218 flow [2024-06-14 12:31:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:31:48,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:31:48,634 INFO L175 Difference]: Start difference. First operand has 161 places, 163 transitions, 1636 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:31:48,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 200 transitions, 2218 flow [2024-06-14 12:31:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 200 transitions, 2050 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:48,919 INFO L231 Difference]: Finished difference. Result has 163 places, 164 transitions, 1666 flow [2024-06-14 12:31:48,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=163, PETRI_TRANSITIONS=164} [2024-06-14 12:31:48,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 12:31:48,920 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 164 transitions, 1666 flow [2024-06-14 12:31:48,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:48,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:48,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:31:48,920 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:48,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 788644498, now seen corresponding path program 4 times [2024-06-14 12:31:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344217035] [2024-06-14 12:31:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344217035] [2024-06-14 12:31:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344217035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062652953] [2024-06-14 12:31:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:50,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 164 transitions, 1666 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:50,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:51,123 INFO L124 PetriNetUnfolderBase]: 2662/4266 cut-off events. [2024-06-14 12:31:51,123 INFO L125 PetriNetUnfolderBase]: For 283917/283917 co-relation queries the response was YES. [2024-06-14 12:31:51,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29804 conditions, 4266 events. 2662/4266 cut-off events. For 283917/283917 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24301 event pairs, 624 based on Foata normal form. 12/4277 useless extension candidates. Maximal degree in co-relation 29727. Up to 2640 conditions per place. [2024-06-14 12:31:51,155 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 78 changer transitions 0/199 dead transitions. [2024-06-14 12:31:51,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 199 transitions, 2104 flow [2024-06-14 12:31:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:31:51,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:31:51,173 INFO L175 Difference]: Start difference. First operand has 163 places, 164 transitions, 1666 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:31:51,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 199 transitions, 2104 flow [2024-06-14 12:31:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 199 transitions, 1928 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:51,475 INFO L231 Difference]: Finished difference. Result has 164 places, 163 transitions, 1566 flow [2024-06-14 12:31:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1566, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2024-06-14 12:31:51,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 12:31:51,476 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 1566 flow [2024-06-14 12:31:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:51,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:51,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:31:51,482 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:51,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1668106105, now seen corresponding path program 2 times [2024-06-14 12:31:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:51,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259332867] [2024-06-14 12:31:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259332867] [2024-06-14 12:31:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259332867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:52,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:52,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559908392] [2024-06-14 12:31:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:52,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:52,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 1566 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:52,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:52,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:52,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:52,959 INFO L124 PetriNetUnfolderBase]: 2552/4093 cut-off events. [2024-06-14 12:31:52,959 INFO L125 PetriNetUnfolderBase]: For 279152/279180 co-relation queries the response was YES. [2024-06-14 12:31:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 4093 events. 2552/4093 cut-off events. For 279152/279180 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23425 event pairs, 810 based on Foata normal form. 13/4061 useless extension candidates. Maximal degree in co-relation 29015. Up to 3848 conditions per place. [2024-06-14 12:31:52,992 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 125 selfloop transitions, 37 changer transitions 0/179 dead transitions. [2024-06-14 12:31:52,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 179 transitions, 2104 flow [2024-06-14 12:31:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:31:53,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:31:53,010 INFO L175 Difference]: Start difference. First operand has 164 places, 163 transitions, 1566 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:31:53,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 179 transitions, 2104 flow [2024-06-14 12:31:53,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 179 transitions, 1838 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 12:31:53,219 INFO L231 Difference]: Finished difference. Result has 162 places, 169 transitions, 1474 flow [2024-06-14 12:31:53,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1474, PETRI_PLACES=162, PETRI_TRANSITIONS=169} [2024-06-14 12:31:53,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 12:31:53,220 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 169 transitions, 1474 flow [2024-06-14 12:31:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:53,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:53,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:31:53,220 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:53,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1668521815, now seen corresponding path program 3 times [2024-06-14 12:31:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696766805] [2024-06-14 12:31:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696766805] [2024-06-14 12:31:53,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696766805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:53,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:53,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578198338] [2024-06-14 12:31:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:53,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:53,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 169 transitions, 1474 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:53,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:53,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:53,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:54,540 INFO L124 PetriNetUnfolderBase]: 2548/4086 cut-off events. [2024-06-14 12:31:54,540 INFO L125 PetriNetUnfolderBase]: For 283198/283226 co-relation queries the response was YES. [2024-06-14 12:31:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28542 conditions, 4086 events. 2548/4086 cut-off events. For 283198/283226 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23352 event pairs, 809 based on Foata normal form. 12/4054 useless extension candidates. Maximal degree in co-relation 28465. Up to 3845 conditions per place. [2024-06-14 12:31:54,575 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 125 selfloop transitions, 36 changer transitions 0/178 dead transitions. [2024-06-14 12:31:54,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 178 transitions, 1820 flow [2024-06-14 12:31:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:31:54,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:31:54,577 INFO L175 Difference]: Start difference. First operand has 162 places, 169 transitions, 1474 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:31:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 178 transitions, 1820 flow [2024-06-14 12:31:54,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 178 transitions, 1722 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 12:31:54,791 INFO L231 Difference]: Finished difference. Result has 166 places, 169 transitions, 1454 flow [2024-06-14 12:31:54,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1454, PETRI_PLACES=166, PETRI_TRANSITIONS=169} [2024-06-14 12:31:54,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:31:54,792 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 169 transitions, 1454 flow [2024-06-14 12:31:54,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:54,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:54,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:54,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:31:54,793 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:54,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1845588979, now seen corresponding path program 1 times [2024-06-14 12:31:54,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:54,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987825287] [2024-06-14 12:31:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:55,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:55,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987825287] [2024-06-14 12:31:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987825287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:55,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:55,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:55,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361544820] [2024-06-14 12:31:55,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:55,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:55,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:55,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 169 transitions, 1454 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:55,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:56,240 INFO L124 PetriNetUnfolderBase]: 2472/4052 cut-off events. [2024-06-14 12:31:56,241 INFO L125 PetriNetUnfolderBase]: For 252953/252953 co-relation queries the response was YES. [2024-06-14 12:31:56,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27002 conditions, 4052 events. 2472/4052 cut-off events. For 252953/252953 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23646 event pairs, 692 based on Foata normal form. 2/4053 useless extension candidates. Maximal degree in co-relation 26923. Up to 3752 conditions per place. [2024-06-14 12:31:56,277 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 164 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2024-06-14 12:31:56,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 191 transitions, 1918 flow [2024-06-14 12:31:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:31:56,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:31:56,278 INFO L175 Difference]: Start difference. First operand has 166 places, 169 transitions, 1454 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:31:56,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 191 transitions, 1918 flow [2024-06-14 12:31:56,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 191 transitions, 1828 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:56,613 INFO L231 Difference]: Finished difference. Result has 168 places, 175 transitions, 1472 flow [2024-06-14 12:31:56,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=168, PETRI_TRANSITIONS=175} [2024-06-14 12:31:56,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-14 12:31:56,614 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 175 transitions, 1472 flow [2024-06-14 12:31:56,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:56,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:56,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:56,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:31:56,615 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:56,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 898289135, now seen corresponding path program 2 times [2024-06-14 12:31:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265613582] [2024-06-14 12:31:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:57,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265613582] [2024-06-14 12:31:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265613582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:57,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387739637] [2024-06-14 12:31:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:57,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:57,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:57,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 175 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:57,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:57,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:57,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:58,156 INFO L124 PetriNetUnfolderBase]: 2490/4077 cut-off events. [2024-06-14 12:31:58,157 INFO L125 PetriNetUnfolderBase]: For 264132/264132 co-relation queries the response was YES. [2024-06-14 12:31:58,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27942 conditions, 4077 events. 2490/4077 cut-off events. For 264132/264132 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23816 event pairs, 707 based on Foata normal form. 2/4078 useless extension candidates. Maximal degree in co-relation 27861. Up to 3764 conditions per place. [2024-06-14 12:31:58,191 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-14 12:31:58,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 196 transitions, 2090 flow [2024-06-14 12:31:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:31:58,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:31:58,200 INFO L175 Difference]: Start difference. First operand has 168 places, 175 transitions, 1472 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:31:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 196 transitions, 2090 flow [2024-06-14 12:31:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 196 transitions, 2036 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:31:58,516 INFO L231 Difference]: Finished difference. Result has 172 places, 181 transitions, 1574 flow [2024-06-14 12:31:58,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1574, PETRI_PLACES=172, PETRI_TRANSITIONS=181} [2024-06-14 12:31:58,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 12:31:58,517 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 181 transitions, 1574 flow [2024-06-14 12:31:58,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:58,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:58,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:31:58,518 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:58,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1845468823, now seen corresponding path program 1 times [2024-06-14 12:31:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025667361] [2024-06-14 12:31:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:59,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:59,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025667361] [2024-06-14 12:31:59,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025667361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:59,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:59,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:59,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721423388] [2024-06-14 12:31:59,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:59,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:59,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:59,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:31:59,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 181 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:31:59,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:59,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:31:59,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:59,998 INFO L124 PetriNetUnfolderBase]: 2591/4180 cut-off events. [2024-06-14 12:31:59,998 INFO L125 PetriNetUnfolderBase]: For 273199/273199 co-relation queries the response was YES. [2024-06-14 12:32:00,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 4180 events. 2591/4180 cut-off events. For 273199/273199 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23962 event pairs, 741 based on Foata normal form. 1/4180 useless extension candidates. Maximal degree in co-relation 28947. Up to 3991 conditions per place. [2024-06-14 12:32:00,035 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2024-06-14 12:32:00,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 196 transitions, 2042 flow [2024-06-14 12:32:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:32:00,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:32:00,036 INFO L175 Difference]: Start difference. First operand has 172 places, 181 transitions, 1574 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:32:00,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 196 transitions, 2042 flow [2024-06-14 12:32:00,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 196 transitions, 1982 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:00,303 INFO L231 Difference]: Finished difference. Result has 176 places, 184 transitions, 1606 flow [2024-06-14 12:32:00,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1606, PETRI_PLACES=176, PETRI_TRANSITIONS=184} [2024-06-14 12:32:00,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-14 12:32:00,304 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 184 transitions, 1606 flow [2024-06-14 12:32:00,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:00,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:00,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:32:00,305 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:00,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1668100153, now seen corresponding path program 2 times [2024-06-14 12:32:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97198877] [2024-06-14 12:32:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97198877] [2024-06-14 12:32:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97198877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193759546] [2024-06-14 12:32:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:01,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:01,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 184 transitions, 1606 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:01,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:01,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:01,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:01,803 INFO L124 PetriNetUnfolderBase]: 2596/4188 cut-off events. [2024-06-14 12:32:01,803 INFO L125 PetriNetUnfolderBase]: For 282462/282466 co-relation queries the response was YES. [2024-06-14 12:32:01,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29495 conditions, 4188 events. 2596/4188 cut-off events. For 282462/282466 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23978 event pairs, 745 based on Foata normal form. 5/4192 useless extension candidates. Maximal degree in co-relation 29411. Up to 3982 conditions per place. [2024-06-14 12:32:01,841 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 168 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2024-06-14 12:32:01,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 2248 flow [2024-06-14 12:32:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:32:01,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:32:01,842 INFO L175 Difference]: Start difference. First operand has 176 places, 184 transitions, 1606 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:32:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 2248 flow [2024-06-14 12:32:02,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 200 transitions, 2178 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:02,170 INFO L231 Difference]: Finished difference. Result has 178 places, 190 transitions, 1718 flow [2024-06-14 12:32:02,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1718, PETRI_PLACES=178, PETRI_TRANSITIONS=190} [2024-06-14 12:32:02,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-14 12:32:02,171 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 190 transitions, 1718 flow [2024-06-14 12:32:02,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:02,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:02,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:02,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:32:02,172 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:02,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1685462007, now seen corresponding path program 3 times [2024-06-14 12:32:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:02,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121607550] [2024-06-14 12:32:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:02,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121607550] [2024-06-14 12:32:02,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121607550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:02,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:02,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:02,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221890481] [2024-06-14 12:32:02,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:03,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:03,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 190 transitions, 1718 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:03,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:03,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:03,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:03,696 INFO L124 PetriNetUnfolderBase]: 2504/4095 cut-off events. [2024-06-14 12:32:03,696 INFO L125 PetriNetUnfolderBase]: For 293518/293520 co-relation queries the response was YES. [2024-06-14 12:32:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29323 conditions, 4095 events. 2504/4095 cut-off events. For 293518/293520 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23885 event pairs, 717 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 29238. Up to 3764 conditions per place. [2024-06-14 12:32:03,736 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 161 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-06-14 12:32:03,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 205 transitions, 2306 flow [2024-06-14 12:32:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:32:03,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:32:03,737 INFO L175 Difference]: Start difference. First operand has 178 places, 190 transitions, 1718 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:32:03,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 205 transitions, 2306 flow [2024-06-14 12:32:04,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 205 transitions, 2228 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:04,007 INFO L231 Difference]: Finished difference. Result has 182 places, 193 transitions, 1772 flow [2024-06-14 12:32:04,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1772, PETRI_PLACES=182, PETRI_TRANSITIONS=193} [2024-06-14 12:32:04,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:32:04,008 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 193 transitions, 1772 flow [2024-06-14 12:32:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:04,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:04,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:04,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:32:04,008 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:04,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1668337303, now seen corresponding path program 3 times [2024-06-14 12:32:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:04,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249984689] [2024-06-14 12:32:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:04,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:04,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249984689] [2024-06-14 12:32:04,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249984689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:04,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:04,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132562854] [2024-06-14 12:32:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:04,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:04,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 193 transitions, 1772 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:04,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:04,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:04,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:05,520 INFO L124 PetriNetUnfolderBase]: 2587/4176 cut-off events. [2024-06-14 12:32:05,520 INFO L125 PetriNetUnfolderBase]: For 297489/297493 co-relation queries the response was YES. [2024-06-14 12:32:05,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30199 conditions, 4176 events. 2587/4176 cut-off events. For 297489/297493 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23947 event pairs, 744 based on Foata normal form. 5/4180 useless extension candidates. Maximal degree in co-relation 30112. Up to 3971 conditions per place. [2024-06-14 12:32:05,558 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 171 selfloop transitions, 26 changer transitions 0/202 dead transitions. [2024-06-14 12:32:05,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 202 transitions, 2190 flow [2024-06-14 12:32:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:32:05,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:32:05,559 INFO L175 Difference]: Start difference. First operand has 182 places, 193 transitions, 1772 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:32:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 202 transitions, 2190 flow [2024-06-14 12:32:05,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 202 transitions, 2048 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:05,905 INFO L231 Difference]: Finished difference. Result has 184 places, 193 transitions, 1688 flow [2024-06-14 12:32:05,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1688, PETRI_PLACES=184, PETRI_TRANSITIONS=193} [2024-06-14 12:32:05,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:32:05,906 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 193 transitions, 1688 flow [2024-06-14 12:32:05,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:05,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:05,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:05,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:32:05,907 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:05,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 657569732, now seen corresponding path program 1 times [2024-06-14 12:32:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:05,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593775094] [2024-06-14 12:32:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593775094] [2024-06-14 12:32:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593775094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:06,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351179475] [2024-06-14 12:32:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:06,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:06,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 193 transitions, 1688 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:06,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:06,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:06,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:07,506 INFO L124 PetriNetUnfolderBase]: 2710/4331 cut-off events. [2024-06-14 12:32:07,507 INFO L125 PetriNetUnfolderBase]: For 363771/363779 co-relation queries the response was YES. [2024-06-14 12:32:07,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32961 conditions, 4331 events. 2710/4331 cut-off events. For 363771/363779 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24681 event pairs, 782 based on Foata normal form. 9/4339 useless extension candidates. Maximal degree in co-relation 32873. Up to 4064 conditions per place. [2024-06-14 12:32:07,548 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 179 selfloop transitions, 23 changer transitions 0/214 dead transitions. [2024-06-14 12:32:07,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 214 transitions, 2204 flow [2024-06-14 12:32:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:32:07,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:32:07,549 INFO L175 Difference]: Start difference. First operand has 184 places, 193 transitions, 1688 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:32:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 214 transitions, 2204 flow [2024-06-14 12:32:07,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 214 transitions, 2132 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:07,870 INFO L231 Difference]: Finished difference. Result has 185 places, 196 transitions, 1730 flow [2024-06-14 12:32:07,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1730, PETRI_PLACES=185, PETRI_TRANSITIONS=196} [2024-06-14 12:32:07,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 12:32:07,872 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 196 transitions, 1730 flow [2024-06-14 12:32:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:07,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:32:07,873 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)] === [2024-06-14 12:32:07,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1718172096, now seen corresponding path program 2 times [2024-06-14 12:32:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252823600] [2024-06-14 12:32:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:08,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:08,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252823600] [2024-06-14 12:32:08,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252823600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:08,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:08,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047868646] [2024-06-14 12:32:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:08,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:08,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 196 transitions, 1730 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:09,484 INFO L124 PetriNetUnfolderBase]: 2751/4391 cut-off events. [2024-06-14 12:32:09,485 INFO L125 PetriNetUnfolderBase]: For 378376/378380 co-relation queries the response was YES. [2024-06-14 12:32:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33982 conditions, 4391 events. 2751/4391 cut-off events. For 378376/378380 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25001 event pairs, 787 based on Foata normal form. 5/4395 useless extension candidates. Maximal degree in co-relation 33893. Up to 4101 conditions per place. [2024-06-14 12:32:09,529 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 181 selfloop transitions, 36 changer transitions 0/229 dead transitions. [2024-06-14 12:32:09,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 229 transitions, 2612 flow [2024-06-14 12:32:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:32:09,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:32:09,531 INFO L175 Difference]: Start difference. First operand has 185 places, 196 transitions, 1730 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:32:09,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 229 transitions, 2612 flow [2024-06-14 12:32:09,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 229 transitions, 2454 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:09,930 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 1965 flow [2024-06-14 12:32:09,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1965, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-14 12:32:09,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 12:32:09,931 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 1965 flow [2024-06-14 12:32:09,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:09,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:09,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:32:09,932 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)] === [2024-06-14 12:32:09,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1718180032, now seen corresponding path program 1 times [2024-06-14 12:32:09,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:09,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017990992] [2024-06-14 12:32:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017990992] [2024-06-14 12:32:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017990992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:10,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845824888] [2024-06-14 12:32:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:10,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:10,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 1965 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:10,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:10,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:11,618 INFO L124 PetriNetUnfolderBase]: 2657/4231 cut-off events. [2024-06-14 12:32:11,618 INFO L125 PetriNetUnfolderBase]: For 387335/387369 co-relation queries the response was YES. [2024-06-14 12:32:11,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33642 conditions, 4231 events. 2657/4231 cut-off events. For 387335/387369 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23973 event pairs, 774 based on Foata normal form. 17/4202 useless extension candidates. Maximal degree in co-relation 33550. Up to 3947 conditions per place. [2024-06-14 12:32:11,663 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 177 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-14 12:32:11,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 231 transitions, 2467 flow [2024-06-14 12:32:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:32:11,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:32:11,665 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 1965 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:32:11,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 231 transitions, 2467 flow [2024-06-14 12:32:12,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 231 transitions, 2367 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:12,251 INFO L231 Difference]: Finished difference. Result has 195 places, 216 transitions, 1983 flow [2024-06-14 12:32:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1983, PETRI_PLACES=195, PETRI_TRANSITIONS=216} [2024-06-14 12:32:12,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-14 12:32:12,252 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 216 transitions, 1983 flow [2024-06-14 12:32:12,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:12,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:12,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:12,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:32:12,253 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)] === [2024-06-14 12:32:12,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 867913412, now seen corresponding path program 3 times [2024-06-14 12:32:12,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:12,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899477876] [2024-06-14 12:32:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899477876] [2024-06-14 12:32:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899477876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:13,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:13,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:13,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792214900] [2024-06-14 12:32:13,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:13,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:13,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:13,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:13,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 216 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:13,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:13,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:13,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:13,909 INFO L124 PetriNetUnfolderBase]: 2758/4403 cut-off events. [2024-06-14 12:32:13,909 INFO L125 PetriNetUnfolderBase]: For 398032/398034 co-relation queries the response was YES. [2024-06-14 12:32:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34813 conditions, 4403 events. 2758/4403 cut-off events. For 398032/398034 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25030 event pairs, 782 based on Foata normal form. 3/4405 useless extension candidates. Maximal degree in co-relation 34720. Up to 4123 conditions per place. [2024-06-14 12:32:13,957 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 193 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-14 12:32:13,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 233 transitions, 2490 flow [2024-06-14 12:32:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:32:13,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:32:13,958 INFO L175 Difference]: Start difference. First operand has 195 places, 216 transitions, 1983 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:32:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 233 transitions, 2490 flow [2024-06-14 12:32:14,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 233 transitions, 2352 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:14,452 INFO L231 Difference]: Finished difference. Result has 196 places, 217 transitions, 1924 flow [2024-06-14 12:32:14,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=196, PETRI_TRANSITIONS=217} [2024-06-14 12:32:14,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 12:32:14,453 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 217 transitions, 1924 flow [2024-06-14 12:32:14,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:32:14,453 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)] === [2024-06-14 12:32:14,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -503039082, now seen corresponding path program 4 times [2024-06-14 12:32:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030835874] [2024-06-14 12:32:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030835874] [2024-06-14 12:32:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030835874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147624320] [2024-06-14 12:32:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:15,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:15,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 217 transitions, 1924 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:15,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:15,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:15,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:16,105 INFO L124 PetriNetUnfolderBase]: 2763/4410 cut-off events. [2024-06-14 12:32:16,106 INFO L125 PetriNetUnfolderBase]: For 409786/409788 co-relation queries the response was YES. [2024-06-14 12:32:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34985 conditions, 4410 events. 2763/4410 cut-off events. For 409786/409788 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25110 event pairs, 782 based on Foata normal form. 3/4412 useless extension candidates. Maximal degree in co-relation 34891. Up to 4118 conditions per place. [2024-06-14 12:32:16,155 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 182 selfloop transitions, 39 changer transitions 0/233 dead transitions. [2024-06-14 12:32:16,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 233 transitions, 2470 flow [2024-06-14 12:32:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:32:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:32:16,157 INFO L175 Difference]: Start difference. First operand has 196 places, 217 transitions, 1924 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:32:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 233 transitions, 2470 flow [2024-06-14 12:32:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 233 transitions, 2410 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:16,798 INFO L231 Difference]: Finished difference. Result has 198 places, 220 transitions, 2018 flow [2024-06-14 12:32:16,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2018, PETRI_PLACES=198, PETRI_TRANSITIONS=220} [2024-06-14 12:32:16,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-14 12:32:16,798 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 220 transitions, 2018 flow [2024-06-14 12:32:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:16,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:16,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:16,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:32:16,799 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)] === [2024-06-14 12:32:16,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -709721690, now seen corresponding path program 5 times [2024-06-14 12:32:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586144248] [2024-06-14 12:32:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:17,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586144248] [2024-06-14 12:32:17,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586144248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:17,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838967116] [2024-06-14 12:32:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:17,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:17,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 220 transitions, 2018 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:17,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:17,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:17,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:18,449 INFO L124 PetriNetUnfolderBase]: 2768/4421 cut-off events. [2024-06-14 12:32:18,449 INFO L125 PetriNetUnfolderBase]: For 423292/423298 co-relation queries the response was YES. [2024-06-14 12:32:18,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35577 conditions, 4421 events. 2768/4421 cut-off events. For 423292/423298 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25210 event pairs, 796 based on Foata normal form. 7/4427 useless extension candidates. Maximal degree in co-relation 35482. Up to 4096 conditions per place. [2024-06-14 12:32:18,496 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 173 selfloop transitions, 57 changer transitions 0/242 dead transitions. [2024-06-14 12:32:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 242 transitions, 2820 flow [2024-06-14 12:32:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:32:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:32:18,498 INFO L175 Difference]: Start difference. First operand has 198 places, 220 transitions, 2018 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:32:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 242 transitions, 2820 flow [2024-06-14 12:32:18,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 242 transitions, 2688 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:18,988 INFO L231 Difference]: Finished difference. Result has 201 places, 231 transitions, 2236 flow [2024-06-14 12:32:18,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2236, PETRI_PLACES=201, PETRI_TRANSITIONS=231} [2024-06-14 12:32:18,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 12:32:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 231 transitions, 2236 flow [2024-06-14 12:32:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:18,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:18,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:18,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:32:18,990 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)] === [2024-06-14 12:32:18,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 665933078, now seen corresponding path program 6 times [2024-06-14 12:32:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484995164] [2024-06-14 12:32:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:19,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484995164] [2024-06-14 12:32:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484995164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641851683] [2024-06-14 12:32:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:19,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:19,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 231 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:19,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:19,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:19,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:20,603 INFO L124 PetriNetUnfolderBase]: 2769/4422 cut-off events. [2024-06-14 12:32:20,603 INFO L125 PetriNetUnfolderBase]: For 438514/438520 co-relation queries the response was YES. [2024-06-14 12:32:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36149 conditions, 4422 events. 2769/4422 cut-off events. For 438514/438520 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25229 event pairs, 795 based on Foata normal form. 7/4428 useless extension candidates. Maximal degree in co-relation 36052. Up to 4098 conditions per place. [2024-06-14 12:32:20,648 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 174 selfloop transitions, 60 changer transitions 0/246 dead transitions. [2024-06-14 12:32:20,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 246 transitions, 2961 flow [2024-06-14 12:32:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:32:20,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:32:20,650 INFO L175 Difference]: Start difference. First operand has 201 places, 231 transitions, 2236 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:32:20,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 246 transitions, 2961 flow [2024-06-14 12:32:21,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 2829 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-14 12:32:21,258 INFO L231 Difference]: Finished difference. Result has 206 places, 235 transitions, 2327 flow [2024-06-14 12:32:21,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2327, PETRI_PLACES=206, PETRI_TRANSITIONS=235} [2024-06-14 12:32:21,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 12:32:21,259 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 235 transitions, 2327 flow [2024-06-14 12:32:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:21,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:21,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:32:21,260 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)] === [2024-06-14 12:32:21,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash -184567616, now seen corresponding path program 2 times [2024-06-14 12:32:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:21,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57737102] [2024-06-14 12:32:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:22,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57737102] [2024-06-14 12:32:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57737102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:22,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202947021] [2024-06-14 12:32:22,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:22,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:22,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:22,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:22,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 2327 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:22,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:22,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:23,094 INFO L124 PetriNetUnfolderBase]: 2678/4255 cut-off events. [2024-06-14 12:32:23,095 INFO L125 PetriNetUnfolderBase]: For 446250/446294 co-relation queries the response was YES. [2024-06-14 12:32:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35258 conditions, 4255 events. 2678/4255 cut-off events. For 446250/446294 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24102 event pairs, 779 based on Foata normal form. 19/4222 useless extension candidates. Maximal degree in co-relation 35159. Up to 3940 conditions per place. [2024-06-14 12:32:23,143 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 175 selfloop transitions, 50 changer transitions 0/255 dead transitions. [2024-06-14 12:32:23,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 255 transitions, 3047 flow [2024-06-14 12:32:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:32:23,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:32:23,144 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 2327 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:32:23,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 255 transitions, 3047 flow [2024-06-14 12:32:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 255 transitions, 2918 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:23,628 INFO L231 Difference]: Finished difference. Result has 212 places, 244 transitions, 2449 flow [2024-06-14 12:32:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=212, PETRI_TRANSITIONS=244} [2024-06-14 12:32:23,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 12:32:23,628 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 244 transitions, 2449 flow [2024-06-14 12:32:23,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:23,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:23,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:23,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:32:23,629 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:23,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2010886626, now seen corresponding path program 3 times [2024-06-14 12:32:23,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:23,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155814265] [2024-06-14 12:32:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155814265] [2024-06-14 12:32:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155814265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:24,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:24,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210826521] [2024-06-14 12:32:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:24,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:24,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:24,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 244 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:24,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:24,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:24,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:25,260 INFO L124 PetriNetUnfolderBase]: 2681/4261 cut-off events. [2024-06-14 12:32:25,261 INFO L125 PetriNetUnfolderBase]: For 462120/462168 co-relation queries the response was YES. [2024-06-14 12:32:25,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35904 conditions, 4261 events. 2681/4261 cut-off events. For 462120/462168 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24170 event pairs, 779 based on Foata normal form. 24/4232 useless extension candidates. Maximal degree in co-relation 35803. Up to 3944 conditions per place. [2024-06-14 12:32:25,314 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 170 selfloop transitions, 58 changer transitions 0/258 dead transitions. [2024-06-14 12:32:25,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 258 transitions, 3121 flow [2024-06-14 12:32:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:32:25,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:32:25,316 INFO L175 Difference]: Start difference. First operand has 212 places, 244 transitions, 2449 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:32:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 258 transitions, 3121 flow [2024-06-14 12:32:25,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 258 transitions, 3045 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:25,901 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 2551 flow [2024-06-14 12:32:25,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2024-06-14 12:32:25,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 12:32:25,902 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 2551 flow [2024-06-14 12:32:25,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:25,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:25,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:25,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:32:25,902 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:25,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 666315804, now seen corresponding path program 4 times [2024-06-14 12:32:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:25,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207626637] [2024-06-14 12:32:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207626637] [2024-06-14 12:32:26,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207626637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:26,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:26,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494230537] [2024-06-14 12:32:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:26,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:26,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:26,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:26,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 2551 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:26,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:26,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:27,559 INFO L124 PetriNetUnfolderBase]: 2677/4254 cut-off events. [2024-06-14 12:32:27,559 INFO L125 PetriNetUnfolderBase]: For 470678/470726 co-relation queries the response was YES. [2024-06-14 12:32:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 4254 events. 2677/4254 cut-off events. For 470678/470726 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24132 event pairs, 778 based on Foata normal form. 19/4221 useless extension candidates. Maximal degree in co-relation 35936. Up to 3941 conditions per place. [2024-06-14 12:32:27,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 56 changer transitions 0/257 dead transitions. [2024-06-14 12:32:27,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 257 transitions, 3031 flow [2024-06-14 12:32:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:32:27,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:32:27,607 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 2551 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:32:27,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 257 transitions, 3031 flow [2024-06-14 12:32:28,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 257 transitions, 2855 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:28,129 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 2493 flow [2024-06-14 12:32:28,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2493, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-14 12:32:28,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 12:32:28,130 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 2493 flow [2024-06-14 12:32:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:28,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:28,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:32:28,131 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:28,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1844752960, now seen corresponding path program 7 times [2024-06-14 12:32:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:28,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455684633] [2024-06-14 12:32:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455684633] [2024-06-14 12:32:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455684633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:28,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403762936] [2024-06-14 12:32:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:29,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:29,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 2493 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:29,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:29,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:29,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:29,913 INFO L124 PetriNetUnfolderBase]: 2812/4482 cut-off events. [2024-06-14 12:32:29,914 INFO L125 PetriNetUnfolderBase]: For 482803/482807 co-relation queries the response was YES. [2024-06-14 12:32:29,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37320 conditions, 4482 events. 2812/4482 cut-off events. For 482803/482807 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25520 event pairs, 782 based on Foata normal form. 5/4478 useless extension candidates. Maximal degree in co-relation 37216. Up to 4178 conditions per place. [2024-06-14 12:32:29,964 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 54 changer transitions 0/285 dead transitions. [2024-06-14 12:32:29,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 285 transitions, 3306 flow [2024-06-14 12:32:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:32:29,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:32:29,965 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 2493 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:32:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 285 transitions, 3306 flow [2024-06-14 12:32:30,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3154 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:30,593 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 2737 flow [2024-06-14 12:32:30,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2737, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-14 12:32:30,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-14 12:32:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 2737 flow [2024-06-14 12:32:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 12:32:30,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:30,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:30,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:32:30,594 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)] === [2024-06-14 12:32:30,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash -119565056, now seen corresponding path program 1 times [2024-06-14 12:32:30,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:30,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342354010] [2024-06-14 12:32:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:30,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342354010] [2024-06-14 12:32:31,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342354010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:31,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:31,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027665898] [2024-06-14 12:32:31,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:31,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:31,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:31,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 2737 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:31,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:31,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:31,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:32,565 INFO L124 PetriNetUnfolderBase]: 2699/4365 cut-off events. [2024-06-14 12:32:32,565 INFO L125 PetriNetUnfolderBase]: For 493426/493426 co-relation queries the response was YES. [2024-06-14 12:32:32,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36855 conditions, 4365 events. 2699/4365 cut-off events. For 493426/493426 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25299 event pairs, 757 based on Foata normal form. 1/4361 useless extension candidates. Maximal degree in co-relation 36748. Up to 4021 conditions per place. [2024-06-14 12:32:32,607 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 245 selfloop transitions, 20 changer transitions 0/283 dead transitions. [2024-06-14 12:32:32,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 283 transitions, 3321 flow [2024-06-14 12:32:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:32:32,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:32:32,609 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 2737 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:32:32,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 283 transitions, 3321 flow [2024-06-14 12:32:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 283 transitions, 3168 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:33,170 INFO L231 Difference]: Finished difference. Result has 226 places, 267 transitions, 2634 flow [2024-06-14 12:32:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2634, PETRI_PLACES=226, PETRI_TRANSITIONS=267} [2024-06-14 12:32:33,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 12:32:33,173 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 267 transitions, 2634 flow [2024-06-14 12:32:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:33,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:32:33,173 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)] === [2024-06-14 12:32:33,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 864588383, now seen corresponding path program 1 times [2024-06-14 12:32:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254964417] [2024-06-14 12:32:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:34,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254964417] [2024-06-14 12:32:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254964417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11868275] [2024-06-14 12:32:34,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:34,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:34,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:34,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:34,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:34,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 267 transitions, 2634 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:34,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:34,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:35,128 INFO L124 PetriNetUnfolderBase]: 2805/4479 cut-off events. [2024-06-14 12:32:35,129 INFO L125 PetriNetUnfolderBase]: For 508084/508084 co-relation queries the response was YES. [2024-06-14 12:32:35,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37589 conditions, 4479 events. 2805/4479 cut-off events. For 508084/508084 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25552 event pairs, 794 based on Foata normal form. 2/4480 useless extension candidates. Maximal degree in co-relation 37481. Up to 4220 conditions per place. [2024-06-14 12:32:35,196 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 21 changer transitions 0/288 dead transitions. [2024-06-14 12:32:35,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 288 transitions, 3308 flow [2024-06-14 12:32:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:32:35,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:32:35,198 INFO L175 Difference]: Start difference. First operand has 226 places, 267 transitions, 2634 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:32:35,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 288 transitions, 3308 flow [2024-06-14 12:32:36,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 288 transitions, 3248 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:32:36,065 INFO L231 Difference]: Finished difference. Result has 227 places, 270 transitions, 2686 flow [2024-06-14 12:32:36,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2686, PETRI_PLACES=227, PETRI_TRANSITIONS=270} [2024-06-14 12:32:36,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:32:36,066 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 270 transitions, 2686 flow [2024-06-14 12:32:36,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:36,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:36,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:36,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:32:36,067 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)] === [2024-06-14 12:32:36,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1374957568, now seen corresponding path program 1 times [2024-06-14 12:32:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507505574] [2024-06-14 12:32:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:36,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:37,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507505574] [2024-06-14 12:32:37,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507505574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:37,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:37,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519885046] [2024-06-14 12:32:37,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:37,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:37,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:37,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:37,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 270 transitions, 2686 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:37,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:37,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:37,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:37,975 INFO L124 PetriNetUnfolderBase]: 2810/4488 cut-off events. [2024-06-14 12:32:37,975 INFO L125 PetriNetUnfolderBase]: For 522752/522752 co-relation queries the response was YES. [2024-06-14 12:32:38,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38203 conditions, 4488 events. 2810/4488 cut-off events. For 522752/522752 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25666 event pairs, 795 based on Foata normal form. 2/4489 useless extension candidates. Maximal degree in co-relation 38095. Up to 4250 conditions per place. [2024-06-14 12:32:38,024 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 258 selfloop transitions, 18 changer transitions 0/286 dead transitions. [2024-06-14 12:32:38,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 286 transitions, 3342 flow [2024-06-14 12:32:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:32:38,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:32:38,025 INFO L175 Difference]: Start difference. First operand has 227 places, 270 transitions, 2686 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:32:38,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 286 transitions, 3342 flow [2024-06-14 12:32:38,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 286 transitions, 3252 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:38,783 INFO L231 Difference]: Finished difference. Result has 229 places, 273 transitions, 2708 flow [2024-06-14 12:32:38,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=229, PETRI_TRANSITIONS=273} [2024-06-14 12:32:38,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 12:32:38,783 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 273 transitions, 2708 flow [2024-06-14 12:32:38,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:38,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:38,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:32:38,784 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:38,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1374963365, now seen corresponding path program 2 times [2024-06-14 12:32:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434645235] [2024-06-14 12:32:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:39,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:39,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434645235] [2024-06-14 12:32:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434645235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:39,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:39,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784415258] [2024-06-14 12:32:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:39,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:39,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 273 transitions, 2708 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:39,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:39,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:39,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:40,760 INFO L124 PetriNetUnfolderBase]: 2844/4535 cut-off events. [2024-06-14 12:32:40,761 INFO L125 PetriNetUnfolderBase]: For 545235/545235 co-relation queries the response was YES. [2024-06-14 12:32:40,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39223 conditions, 4535 events. 2844/4535 cut-off events. For 545235/545235 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25872 event pairs, 781 based on Foata normal form. 2/4536 useless extension candidates. Maximal degree in co-relation 39114. Up to 4238 conditions per place. [2024-06-14 12:32:40,807 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 253 selfloop transitions, 37 changer transitions 0/300 dead transitions. [2024-06-14 12:32:40,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 300 transitions, 3830 flow [2024-06-14 12:32:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:32:40,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:32:40,809 INFO L175 Difference]: Start difference. First operand has 229 places, 273 transitions, 2708 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:32:40,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 300 transitions, 3830 flow [2024-06-14 12:32:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 300 transitions, 3740 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:41,851 INFO L231 Difference]: Finished difference. Result has 231 places, 282 transitions, 2902 flow [2024-06-14 12:32:41,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2902, PETRI_PLACES=231, PETRI_TRANSITIONS=282} [2024-06-14 12:32:41,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:32:41,851 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 282 transitions, 2902 flow [2024-06-14 12:32:41,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:41,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:41,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:41,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:32:41,852 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:41,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1374957785, now seen corresponding path program 3 times [2024-06-14 12:32:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:41,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983925892] [2024-06-14 12:32:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:42,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:42,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983925892] [2024-06-14 12:32:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983925892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:42,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:42,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:42,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122703691] [2024-06-14 12:32:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:42,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:42,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:42,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 282 transitions, 2902 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:42,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:42,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:42,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:43,695 INFO L124 PetriNetUnfolderBase]: 2838/4527 cut-off events. [2024-06-14 12:32:43,695 INFO L125 PetriNetUnfolderBase]: For 556883/556883 co-relation queries the response was YES. [2024-06-14 12:32:43,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39588 conditions, 4527 events. 2838/4527 cut-off events. For 556883/556883 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25838 event pairs, 778 based on Foata normal form. 2/4528 useless extension candidates. Maximal degree in co-relation 39478. Up to 4233 conditions per place. [2024-06-14 12:32:43,739 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 250 selfloop transitions, 39 changer transitions 0/299 dead transitions. [2024-06-14 12:32:43,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 299 transitions, 3680 flow [2024-06-14 12:32:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:32:43,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:32:43,741 INFO L175 Difference]: Start difference. First operand has 231 places, 282 transitions, 2902 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:32:43,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 299 transitions, 3680 flow [2024-06-14 12:32:44,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 299 transitions, 3543 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:44,462 INFO L231 Difference]: Finished difference. Result has 236 places, 282 transitions, 2849 flow [2024-06-14 12:32:44,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2849, PETRI_PLACES=236, PETRI_TRANSITIONS=282} [2024-06-14 12:32:44,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 12:32:44,463 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 282 transitions, 2849 flow [2024-06-14 12:32:44,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:44,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:44,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:44,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:32:44,463 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:44,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -171229184, now seen corresponding path program 2 times [2024-06-14 12:32:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957802741] [2024-06-14 12:32:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957802741] [2024-06-14 12:32:45,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957802741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:45,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:45,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:45,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427382901] [2024-06-14 12:32:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:45,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:45,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 282 transitions, 2849 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:45,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:45,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:45,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:46,225 INFO L124 PetriNetUnfolderBase]: 2843/4537 cut-off events. [2024-06-14 12:32:46,225 INFO L125 PetriNetUnfolderBase]: For 570500/570504 co-relation queries the response was YES. [2024-06-14 12:32:46,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39783 conditions, 4537 events. 2843/4537 cut-off events. For 570500/570504 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25890 event pairs, 787 based on Foata normal form. 6/4542 useless extension candidates. Maximal degree in co-relation 39671. Up to 4266 conditions per place. [2024-06-14 12:32:46,273 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 248 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-14 12:32:46,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 3749 flow [2024-06-14 12:32:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:32:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:32:46,274 INFO L175 Difference]: Start difference. First operand has 236 places, 282 transitions, 2849 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:32:46,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 3749 flow [2024-06-14 12:32:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 299 transitions, 3675 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:47,213 INFO L231 Difference]: Finished difference. Result has 238 places, 288 transitions, 3014 flow [2024-06-14 12:32:47,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=238, PETRI_TRANSITIONS=288} [2024-06-14 12:32:47,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:32:47,214 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 288 transitions, 3014 flow [2024-06-14 12:32:47,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:47,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:47,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:47,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:32:47,215 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)] === [2024-06-14 12:32:47,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash -171496311, now seen corresponding path program 4 times [2024-06-14 12:32:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136710576] [2024-06-14 12:32:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:47,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136710576] [2024-06-14 12:32:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136710576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:48,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:48,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732535217] [2024-06-14 12:32:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:48,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:48,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 288 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:48,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:48,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:48,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:49,076 INFO L124 PetriNetUnfolderBase]: 2853/4552 cut-off events. [2024-06-14 12:32:49,077 INFO L125 PetriNetUnfolderBase]: For 587575/587577 co-relation queries the response was YES. [2024-06-14 12:32:49,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40364 conditions, 4552 events. 2853/4552 cut-off events. For 587575/587577 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25969 event pairs, 790 based on Foata normal form. 2/4553 useless extension candidates. Maximal degree in co-relation 40251. Up to 4214 conditions per place. [2024-06-14 12:32:49,127 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 240 selfloop transitions, 58 changer transitions 0/308 dead transitions. [2024-06-14 12:32:49,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 308 transitions, 3950 flow [2024-06-14 12:32:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:32:49,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:32:49,128 INFO L175 Difference]: Start difference. First operand has 238 places, 288 transitions, 3014 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:32:49,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 308 transitions, 3950 flow [2024-06-14 12:32:49,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 308 transitions, 3837 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:49,942 INFO L231 Difference]: Finished difference. Result has 242 places, 294 transitions, 3177 flow [2024-06-14 12:32:49,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3177, PETRI_PLACES=242, PETRI_TRANSITIONS=294} [2024-06-14 12:32:49,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 12:32:49,943 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 294 transitions, 3177 flow [2024-06-14 12:32:49,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:49,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:49,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:49,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:32:49,944 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)] === [2024-06-14 12:32:49,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:49,944 INFO L85 PathProgramCache]: Analyzing trace with hash -171496094, now seen corresponding path program 3 times [2024-06-14 12:32:49,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525897765] [2024-06-14 12:32:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:49,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:50,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:50,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525897765] [2024-06-14 12:32:50,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525897765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:50,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:50,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484705621] [2024-06-14 12:32:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:50,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:50,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 294 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:50,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:50,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:50,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:51,829 INFO L124 PetriNetUnfolderBase]: 2858/4560 cut-off events. [2024-06-14 12:32:51,830 INFO L125 PetriNetUnfolderBase]: For 604953/604957 co-relation queries the response was YES. [2024-06-14 12:32:51,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41056 conditions, 4560 events. 2858/4560 cut-off events. For 604953/604957 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26063 event pairs, 804 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 40941. Up to 4286 conditions per place. [2024-06-14 12:32:51,887 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 256 selfloop transitions, 42 changer transitions 0/308 dead transitions. [2024-06-14 12:32:51,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 308 transitions, 4019 flow [2024-06-14 12:32:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:32:51,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:32:51,889 INFO L175 Difference]: Start difference. First operand has 242 places, 294 transitions, 3177 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:32:51,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 308 transitions, 4019 flow [2024-06-14 12:32:52,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 308 transitions, 3898 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:52,874 INFO L231 Difference]: Finished difference. Result has 246 places, 297 transitions, 3210 flow [2024-06-14 12:32:52,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3210, PETRI_PLACES=246, PETRI_TRANSITIONS=297} [2024-06-14 12:32:52,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 12:32:52,875 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 297 transitions, 3210 flow [2024-06-14 12:32:52,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:52,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:52,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:52,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:32:52,875 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)] === [2024-06-14 12:32:52,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -178853541, now seen corresponding path program 5 times [2024-06-14 12:32:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132016780] [2024-06-14 12:32:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132016780] [2024-06-14 12:32:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132016780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:53,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:53,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:53,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792072657] [2024-06-14 12:32:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:53,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:53,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 297 transitions, 3210 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:53,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:53,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:53,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:54,724 INFO L124 PetriNetUnfolderBase]: 2873/4580 cut-off events. [2024-06-14 12:32:54,724 INFO L125 PetriNetUnfolderBase]: For 616674/616676 co-relation queries the response was YES. [2024-06-14 12:32:54,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41040 conditions, 4580 events. 2873/4580 cut-off events. For 616674/616676 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26157 event pairs, 794 based on Foata normal form. 2/4581 useless extension candidates. Maximal degree in co-relation 40923. Up to 4236 conditions per place. [2024-06-14 12:32:54,787 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 247 selfloop transitions, 58 changer transitions 0/315 dead transitions. [2024-06-14 12:32:54,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 315 transitions, 4244 flow [2024-06-14 12:32:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:32:54,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:32:54,789 INFO L175 Difference]: Start difference. First operand has 246 places, 297 transitions, 3210 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:32:54,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 315 transitions, 4244 flow [2024-06-14 12:32:55,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 315 transitions, 4132 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:55,935 INFO L231 Difference]: Finished difference. Result has 249 places, 300 transitions, 3292 flow [2024-06-14 12:32:55,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3292, PETRI_PLACES=249, PETRI_TRANSITIONS=300} [2024-06-14 12:32:55,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:32:55,936 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 300 transitions, 3292 flow [2024-06-14 12:32:55,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:55,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:55,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:32:55,936 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)] === [2024-06-14 12:32:55,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -178847961, now seen corresponding path program 6 times [2024-06-14 12:32:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:55,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665869644] [2024-06-14 12:32:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665869644] [2024-06-14 12:32:56,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665869644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:56,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:56,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625177525] [2024-06-14 12:32:56,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:56,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:56,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:56,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 300 transitions, 3292 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:56,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:56,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:56,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:57,753 INFO L124 PetriNetUnfolderBase]: 2867/4572 cut-off events. [2024-06-14 12:32:57,753 INFO L125 PetriNetUnfolderBase]: For 625622/625624 co-relation queries the response was YES. [2024-06-14 12:32:57,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41035 conditions, 4572 events. 2867/4572 cut-off events. For 625622/625624 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26114 event pairs, 808 based on Foata normal form. 2/4573 useless extension candidates. Maximal degree in co-relation 40917. Up to 4231 conditions per place. [2024-06-14 12:32:57,810 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 248 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2024-06-14 12:32:57,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 315 transitions, 4104 flow [2024-06-14 12:32:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:32:57,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:32:57,811 INFO L175 Difference]: Start difference. First operand has 249 places, 300 transitions, 3292 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:32:57,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 315 transitions, 4104 flow [2024-06-14 12:32:59,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 315 transitions, 3859 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:59,111 INFO L231 Difference]: Finished difference. Result has 251 places, 300 transitions, 3167 flow [2024-06-14 12:32:59,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3167, PETRI_PLACES=251, PETRI_TRANSITIONS=300} [2024-06-14 12:32:59,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 12:32:59,112 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 300 transitions, 3167 flow [2024-06-14 12:32:59,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:59,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:59,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:59,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:32:59,112 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)] === [2024-06-14 12:32:59,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash -178847744, now seen corresponding path program 4 times [2024-06-14 12:32:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772336752] [2024-06-14 12:32:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:59,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:59,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772336752] [2024-06-14 12:32:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772336752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:59,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:59,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927347680] [2024-06-14 12:32:59,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:59,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:59,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:59,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:00,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:00,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 300 transitions, 3167 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:00,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:00,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:00,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:00,904 INFO L124 PetriNetUnfolderBase]: 2861/4563 cut-off events. [2024-06-14 12:33:00,904 INFO L125 PetriNetUnfolderBase]: For 632962/632966 co-relation queries the response was YES. [2024-06-14 12:33:00,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40715 conditions, 4563 events. 2861/4563 cut-off events. For 632962/632966 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26089 event pairs, 802 based on Foata normal form. 6/4568 useless extension candidates. Maximal degree in co-relation 40597. Up to 4291 conditions per place. [2024-06-14 12:33:00,965 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 259 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-14 12:33:00,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 310 transitions, 3795 flow [2024-06-14 12:33:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:33:00,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:33:00,966 INFO L175 Difference]: Start difference. First operand has 251 places, 300 transitions, 3167 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:33:00,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 310 transitions, 3795 flow [2024-06-14 12:33:02,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 310 transitions, 3595 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:02,010 INFO L231 Difference]: Finished difference. Result has 251 places, 300 transitions, 3055 flow [2024-06-14 12:33:02,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3055, PETRI_PLACES=251, PETRI_TRANSITIONS=300} [2024-06-14 12:33:02,011 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 12:33:02,011 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 300 transitions, 3055 flow [2024-06-14 12:33:02,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:02,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:02,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:02,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:33:02,012 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)] === [2024-06-14 12:33:02,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -171219264, now seen corresponding path program 1 times [2024-06-14 12:33:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:02,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327803044] [2024-06-14 12:33:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:03,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:03,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327803044] [2024-06-14 12:33:03,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327803044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:03,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:03,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807815715] [2024-06-14 12:33:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:03,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:03,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 300 transitions, 3055 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:03,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:03,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:03,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:04,125 INFO L124 PetriNetUnfolderBase]: 2761/4402 cut-off events. [2024-06-14 12:33:04,126 INFO L125 PetriNetUnfolderBase]: For 641002/641035 co-relation queries the response was YES. [2024-06-14 12:33:04,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39958 conditions, 4402 events. 2761/4402 cut-off events. For 641002/641035 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 25190 event pairs, 778 based on Foata normal form. 16/4379 useless extension candidates. Maximal degree in co-relation 39839. Up to 4147 conditions per place. [2024-06-14 12:33:04,182 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 21 changer transitions 0/314 dead transitions. [2024-06-14 12:33:04,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 314 transitions, 3707 flow [2024-06-14 12:33:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 12:33:04,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-14 12:33:04,184 INFO L175 Difference]: Start difference. First operand has 251 places, 300 transitions, 3055 flow. Second operand 9 states and 139 transitions. [2024-06-14 12:33:04,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 314 transitions, 3707 flow [2024-06-14 12:33:05,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 314 transitions, 3581 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:05,132 INFO L231 Difference]: Finished difference. Result has 252 places, 303 transitions, 3049 flow [2024-06-14 12:33:05,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3049, PETRI_PLACES=252, PETRI_TRANSITIONS=303} [2024-06-14 12:33:05,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:33:05,133 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 303 transitions, 3049 flow [2024-06-14 12:33:05,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:05,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:05,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:05,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:33:05,134 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)] === [2024-06-14 12:33:05,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1431006898, now seen corresponding path program 1 times [2024-06-14 12:33:05,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291066938] [2024-06-14 12:33:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:05,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291066938] [2024-06-14 12:33:05,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291066938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:05,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:05,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656789741] [2024-06-14 12:33:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:05,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:06,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:06,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 303 transitions, 3049 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:06,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:06,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:06,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:07,102 INFO L124 PetriNetUnfolderBase]: 2889/4588 cut-off events. [2024-06-14 12:33:07,102 INFO L125 PetriNetUnfolderBase]: For 659736/659736 co-relation queries the response was YES. [2024-06-14 12:33:07,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41477 conditions, 4588 events. 2889/4588 cut-off events. For 659736/659736 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26114 event pairs, 765 based on Foata normal form. 1/4580 useless extension candidates. Maximal degree in co-relation 41357. Up to 4273 conditions per place. [2024-06-14 12:33:07,161 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 277 selfloop transitions, 33 changer transitions 0/329 dead transitions. [2024-06-14 12:33:07,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 329 transitions, 3825 flow [2024-06-14 12:33:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:33:07,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:33:07,162 INFO L175 Difference]: Start difference. First operand has 252 places, 303 transitions, 3049 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:33:07,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 329 transitions, 3825 flow [2024-06-14 12:33:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 329 transitions, 3637 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-14 12:33:08,171 INFO L231 Difference]: Finished difference. Result has 250 places, 306 transitions, 3020 flow [2024-06-14 12:33:08,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3020, PETRI_PLACES=250, PETRI_TRANSITIONS=306} [2024-06-14 12:33:08,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 12:33:08,172 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 306 transitions, 3020 flow [2024-06-14 12:33:08,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:08,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:08,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:08,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:33:08,173 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)] === [2024-06-14 12:33:08,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1436720818, now seen corresponding path program 2 times [2024-06-14 12:33:08,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:08,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100222717] [2024-06-14 12:33:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:08,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:09,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:09,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100222717] [2024-06-14 12:33:09,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100222717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:09,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:09,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:09,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468599964] [2024-06-14 12:33:09,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:09,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:09,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:09,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 306 transitions, 3020 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:09,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:09,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:10,163 INFO L124 PetriNetUnfolderBase]: 2899/4604 cut-off events. [2024-06-14 12:33:10,164 INFO L125 PetriNetUnfolderBase]: For 677004/677004 co-relation queries the response was YES. [2024-06-14 12:33:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42117 conditions, 4604 events. 2899/4604 cut-off events. For 677004/677004 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26206 event pairs, 765 based on Foata normal form. 1/4596 useless extension candidates. Maximal degree in co-relation 41997. Up to 4277 conditions per place. [2024-06-14 12:33:10,211 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 39 changer transitions 0/336 dead transitions. [2024-06-14 12:33:10,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 336 transitions, 3840 flow [2024-06-14 12:33:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:33:10,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:33:10,212 INFO L175 Difference]: Start difference. First operand has 250 places, 306 transitions, 3020 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:33:10,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 336 transitions, 3840 flow [2024-06-14 12:33:11,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 336 transitions, 3705 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:11,132 INFO L231 Difference]: Finished difference. Result has 254 places, 312 transitions, 3100 flow [2024-06-14 12:33:11,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3100, PETRI_PLACES=254, PETRI_TRANSITIONS=312} [2024-06-14 12:33:11,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:33:11,133 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 312 transitions, 3100 flow [2024-06-14 12:33:11,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:11,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:11,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:33:11,134 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)] === [2024-06-14 12:33:11,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1546476814, now seen corresponding path program 1 times [2024-06-14 12:33:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:11,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601558489] [2024-06-14 12:33:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:12,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601558489] [2024-06-14 12:33:12,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601558489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:12,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:12,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:12,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405361757] [2024-06-14 12:33:12,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:12,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:12,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:12,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:12,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:12,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 312 transitions, 3100 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:12,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:12,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:12,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:13,147 INFO L124 PetriNetUnfolderBase]: 2909/4620 cut-off events. [2024-06-14 12:33:13,148 INFO L125 PetriNetUnfolderBase]: For 699441/699443 co-relation queries the response was YES. [2024-06-14 12:33:13,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42786 conditions, 4620 events. 2909/4620 cut-off events. For 699441/699443 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26330 event pairs, 725 based on Foata normal form. 2/4613 useless extension candidates. Maximal degree in co-relation 42664. Up to 4226 conditions per place. [2024-06-14 12:33:13,207 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 274 selfloop transitions, 49 changer transitions 0/342 dead transitions. [2024-06-14 12:33:13,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 342 transitions, 3914 flow [2024-06-14 12:33:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:33:13,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:33:13,209 INFO L175 Difference]: Start difference. First operand has 254 places, 312 transitions, 3100 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:33:13,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 342 transitions, 3914 flow [2024-06-14 12:33:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 342 transitions, 3767 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:14,304 INFO L231 Difference]: Finished difference. Result has 257 places, 318 transitions, 3154 flow [2024-06-14 12:33:14,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3154, PETRI_PLACES=257, PETRI_TRANSITIONS=318} [2024-06-14 12:33:14,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 12:33:14,304 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 318 transitions, 3154 flow [2024-06-14 12:33:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:14,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:14,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:14,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:33:14,305 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)] === [2024-06-14 12:33:14,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1546298068, now seen corresponding path program 3 times [2024-06-14 12:33:14,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:14,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787317889] [2024-06-14 12:33:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787317889] [2024-06-14 12:33:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787317889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:15,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640797930] [2024-06-14 12:33:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:15,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:15,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 318 transitions, 3154 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:15,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:15,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:15,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:16,101 INFO L124 PetriNetUnfolderBase]: 2914/4626 cut-off events. [2024-06-14 12:33:16,102 INFO L125 PetriNetUnfolderBase]: For 713575/713579 co-relation queries the response was YES. [2024-06-14 12:33:16,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43713 conditions, 4626 events. 2914/4626 cut-off events. For 713575/713579 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26426 event pairs, 751 based on Foata normal form. 5/4622 useless extension candidates. Maximal degree in co-relation 43589. Up to 4238 conditions per place. [2024-06-14 12:33:16,162 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 274 selfloop transitions, 50 changer transitions 0/343 dead transitions. [2024-06-14 12:33:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 343 transitions, 3973 flow [2024-06-14 12:33:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:33:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:33:16,165 INFO L175 Difference]: Start difference. First operand has 257 places, 318 transitions, 3154 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:33:16,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 343 transitions, 3973 flow [2024-06-14 12:33:17,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 343 transitions, 3838 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:17,419 INFO L231 Difference]: Finished difference. Result has 261 places, 321 transitions, 3225 flow [2024-06-14 12:33:17,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3225, PETRI_PLACES=261, PETRI_TRANSITIONS=321} [2024-06-14 12:33:17,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 12:33:17,420 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 321 transitions, 3225 flow [2024-06-14 12:33:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:17,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:17,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:33:17,421 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)] === [2024-06-14 12:33:17,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1546596970, now seen corresponding path program 1 times [2024-06-14 12:33:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168991743] [2024-06-14 12:33:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:18,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:18,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168991743] [2024-06-14 12:33:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168991743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:18,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499292507] [2024-06-14 12:33:18,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:18,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 321 transitions, 3225 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:18,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:18,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:18,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:19,205 INFO L124 PetriNetUnfolderBase]: 3009/4729 cut-off events. [2024-06-14 12:33:19,205 INFO L125 PetriNetUnfolderBase]: For 730827/730831 co-relation queries the response was YES. [2024-06-14 12:33:19,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44774 conditions, 4729 events. 3009/4729 cut-off events. For 730827/730831 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26588 event pairs, 763 based on Foata normal form. 5/4733 useless extension candidates. Maximal degree in co-relation 44649. Up to 4521 conditions per place. [2024-06-14 12:33:19,264 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 295 selfloop transitions, 44 changer transitions 0/343 dead transitions. [2024-06-14 12:33:19,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 343 transitions, 4042 flow [2024-06-14 12:33:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:33:19,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:33:19,265 INFO L175 Difference]: Start difference. First operand has 261 places, 321 transitions, 3225 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:33:19,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 343 transitions, 4042 flow [2024-06-14 12:33:20,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 343 transitions, 3858 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:20,162 INFO L231 Difference]: Finished difference. Result has 263 places, 324 transitions, 3217 flow [2024-06-14 12:33:20,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=263, PETRI_TRANSITIONS=324} [2024-06-14 12:33:20,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 12:33:20,163 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 324 transitions, 3217 flow [2024-06-14 12:33:20,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:20,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:20,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:33:20,163 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)] === [2024-06-14 12:33:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1546596784, now seen corresponding path program 2 times [2024-06-14 12:33:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449961006] [2024-06-14 12:33:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:20,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:20,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449961006] [2024-06-14 12:33:20,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449961006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:20,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513209406] [2024-06-14 12:33:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:20,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:20,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 324 transitions, 3217 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:21,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:22,106 INFO L124 PetriNetUnfolderBase]: 2947/4671 cut-off events. [2024-06-14 12:33:22,107 INFO L125 PetriNetUnfolderBase]: For 757608/757610 co-relation queries the response was YES. [2024-06-14 12:33:22,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45113 conditions, 4671 events. 2947/4671 cut-off events. For 757608/757610 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26617 event pairs, 724 based on Foata normal form. 2/4664 useless extension candidates. Maximal degree in co-relation 44987. Up to 4250 conditions per place. [2024-06-14 12:33:22,166 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 60 changer transitions 0/353 dead transitions. [2024-06-14 12:33:22,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 353 transitions, 4292 flow [2024-06-14 12:33:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:33:22,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:33:22,167 INFO L175 Difference]: Start difference. First operand has 263 places, 324 transitions, 3217 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:33:22,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 353 transitions, 4292 flow [2024-06-14 12:33:23,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 353 transitions, 4142 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:23,505 INFO L231 Difference]: Finished difference. Result has 265 places, 330 transitions, 3353 flow [2024-06-14 12:33:23,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3353, PETRI_PLACES=265, PETRI_TRANSITIONS=330} [2024-06-14 12:33:23,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 12:33:23,506 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 330 transitions, 3353 flow [2024-06-14 12:33:23,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:23,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:23,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:23,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:33:23,506 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)] === [2024-06-14 12:33:23,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash -551755318, now seen corresponding path program 4 times [2024-06-14 12:33:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:23,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938266872] [2024-06-14 12:33:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:24,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938266872] [2024-06-14 12:33:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938266872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:24,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560336788] [2024-06-14 12:33:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:24,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:24,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 330 transitions, 3353 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:24,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:24,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:24,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:25,413 INFO L124 PetriNetUnfolderBase]: 2952/4672 cut-off events. [2024-06-14 12:33:25,413 INFO L125 PetriNetUnfolderBase]: For 774673/774677 co-relation queries the response was YES. [2024-06-14 12:33:25,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45823 conditions, 4672 events. 2952/4672 cut-off events. For 774673/774677 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26557 event pairs, 761 based on Foata normal form. 5/4668 useless extension candidates. Maximal degree in co-relation 45696. Up to 4264 conditions per place. [2024-06-14 12:33:25,471 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 62 changer transitions 0/352 dead transitions. [2024-06-14 12:33:25,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 352 transitions, 4186 flow [2024-06-14 12:33:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:33:25,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:33:25,473 INFO L175 Difference]: Start difference. First operand has 265 places, 330 transitions, 3353 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:33:25,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 352 transitions, 4186 flow [2024-06-14 12:33:26,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 352 transitions, 4054 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:26,618 INFO L231 Difference]: Finished difference. Result has 269 places, 333 transitions, 3463 flow [2024-06-14 12:33:26,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3463, PETRI_PLACES=269, PETRI_TRANSITIONS=333} [2024-06-14 12:33:26,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-14 12:33:26,619 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 333 transitions, 3463 flow [2024-06-14 12:33:26,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:26,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:26,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:33:26,620 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)] === [2024-06-14 12:33:26,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -181174154, now seen corresponding path program 2 times [2024-06-14 12:33:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:26,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234427464] [2024-06-14 12:33:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:26,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:27,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234427464] [2024-06-14 12:33:27,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234427464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:27,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:27,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:27,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114101636] [2024-06-14 12:33:27,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:27,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:27,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:27,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:27,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:27,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 333 transitions, 3463 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:27,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:27,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:28,632 INFO L124 PetriNetUnfolderBase]: 3045/4779 cut-off events. [2024-06-14 12:33:28,632 INFO L125 PetriNetUnfolderBase]: For 795870/795874 co-relation queries the response was YES. [2024-06-14 12:33:28,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47135 conditions, 4779 events. 3045/4779 cut-off events. For 795870/795874 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26901 event pairs, 778 based on Foata normal form. 5/4783 useless extension candidates. Maximal degree in co-relation 47006. Up to 4525 conditions per place. [2024-06-14 12:33:28,694 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2024-06-14 12:33:28,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 357 transitions, 4574 flow [2024-06-14 12:33:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:33:28,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:33:28,695 INFO L175 Difference]: Start difference. First operand has 269 places, 333 transitions, 3463 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:33:28,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 357 transitions, 4574 flow [2024-06-14 12:33:29,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 357 transitions, 4358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:29,633 INFO L231 Difference]: Finished difference. Result has 272 places, 341 transitions, 3605 flow [2024-06-14 12:33:29,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=272, PETRI_TRANSITIONS=341} [2024-06-14 12:33:29,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 12:33:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 341 transitions, 3605 flow [2024-06-14 12:33:29,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:29,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:29,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:29,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:33:29,634 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)] === [2024-06-14 12:33:29,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -181411304, now seen corresponding path program 3 times [2024-06-14 12:33:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:29,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29146862] [2024-06-14 12:33:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:30,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:30,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29146862] [2024-06-14 12:33:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29146862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:30,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:30,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918277019] [2024-06-14 12:33:30,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:30,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:30,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:30,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 341 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:30,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:30,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:30,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:31,582 INFO L124 PetriNetUnfolderBase]: 3050/4784 cut-off events. [2024-06-14 12:33:31,583 INFO L125 PetriNetUnfolderBase]: For 815295/815299 co-relation queries the response was YES. [2024-06-14 12:33:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47646 conditions, 4784 events. 3050/4784 cut-off events. For 815295/815299 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26919 event pairs, 778 based on Foata normal form. 5/4788 useless extension candidates. Maximal degree in co-relation 47515. Up to 4531 conditions per place. [2024-06-14 12:33:31,644 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 69 changer transitions 0/360 dead transitions. [2024-06-14 12:33:31,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 360 transitions, 4636 flow [2024-06-14 12:33:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:33:31,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:33:31,645 INFO L175 Difference]: Start difference. First operand has 272 places, 341 transitions, 3605 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:33:31,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 360 transitions, 4636 flow [2024-06-14 12:33:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 360 transitions, 4446 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:32,898 INFO L231 Difference]: Finished difference. Result has 276 places, 344 transitions, 3654 flow [2024-06-14 12:33:32,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3654, PETRI_PLACES=276, PETRI_TRANSITIONS=344} [2024-06-14 12:33:32,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:33:32,899 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 344 transitions, 3654 flow [2024-06-14 12:33:32,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:32,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:32,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:32,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:33:32,900 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)] === [2024-06-14 12:33:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1436326864, now seen corresponding path program 5 times [2024-06-14 12:33:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:32,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339641415] [2024-06-14 12:33:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339641415] [2024-06-14 12:33:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339641415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:33,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147286520] [2024-06-14 12:33:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:33,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:33,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 344 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:33,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:33,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:33,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:34,880 INFO L124 PetriNetUnfolderBase]: 2977/4705 cut-off events. [2024-06-14 12:33:34,880 INFO L125 PetriNetUnfolderBase]: For 837958/837961 co-relation queries the response was YES. [2024-06-14 12:33:34,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47606 conditions, 4705 events. 2977/4705 cut-off events. For 837958/837961 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26733 event pairs, 744 based on Foata normal form. 4/4704 useless extension candidates. Maximal degree in co-relation 47473. Up to 4384 conditions per place. [2024-06-14 12:33:34,944 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 300 selfloop transitions, 38 changer transitions 0/362 dead transitions. [2024-06-14 12:33:34,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 4488 flow [2024-06-14 12:33:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:33:34,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:33:34,946 INFO L175 Difference]: Start difference. First operand has 276 places, 344 transitions, 3654 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:33:34,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 4488 flow [2024-06-14 12:33:36,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 362 transitions, 4330 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:36,307 INFO L231 Difference]: Finished difference. Result has 279 places, 347 transitions, 3696 flow [2024-06-14 12:33:36,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3696, PETRI_PLACES=279, PETRI_TRANSITIONS=347} [2024-06-14 12:33:36,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:33:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 347 transitions, 3696 flow [2024-06-14 12:33:36,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:36,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:36,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:36,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:33:36,308 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)] === [2024-06-14 12:33:36,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1723728304, now seen corresponding path program 3 times [2024-06-14 12:33:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522870204] [2024-06-14 12:33:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:37,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522870204] [2024-06-14 12:33:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522870204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:37,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:37,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379611519] [2024-06-14 12:33:37,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:37,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:37,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 347 transitions, 3696 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:37,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:37,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:37,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:38,242 INFO L124 PetriNetUnfolderBase]: 3003/4746 cut-off events. [2024-06-14 12:33:38,243 INFO L125 PetriNetUnfolderBase]: For 872173/872178 co-relation queries the response was YES. [2024-06-14 12:33:38,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48701 conditions, 4746 events. 3003/4746 cut-off events. For 872173/872178 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26988 event pairs, 737 based on Foata normal form. 5/4746 useless extension candidates. Maximal degree in co-relation 48567. Up to 4267 conditions per place. [2024-06-14 12:33:38,305 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 83 changer transitions 0/372 dead transitions. [2024-06-14 12:33:38,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 372 transitions, 4816 flow [2024-06-14 12:33:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:33:38,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:33:38,307 INFO L175 Difference]: Start difference. First operand has 279 places, 347 transitions, 3696 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:33:38,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 372 transitions, 4816 flow [2024-06-14 12:33:39,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 372 transitions, 4613 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:39,468 INFO L231 Difference]: Finished difference. Result has 281 places, 353 transitions, 3849 flow [2024-06-14 12:33:39,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=281, PETRI_TRANSITIONS=353} [2024-06-14 12:33:39,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 12:33:39,469 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 353 transitions, 3849 flow [2024-06-14 12:33:39,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:39,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:39,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:33:39,469 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)] === [2024-06-14 12:33:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:39,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1723728118, now seen corresponding path program 6 times [2024-06-14 12:33:39,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:39,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994320935] [2024-06-14 12:33:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:40,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994320935] [2024-06-14 12:33:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994320935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:40,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:40,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:40,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648273086] [2024-06-14 12:33:40,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:40,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:40,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:40,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 353 transitions, 3849 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:40,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:40,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:41,355 INFO L124 PetriNetUnfolderBase]: 3016/4763 cut-off events. [2024-06-14 12:33:41,355 INFO L125 PetriNetUnfolderBase]: For 895434/895441 co-relation queries the response was YES. [2024-06-14 12:33:41,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49724 conditions, 4763 events. 3016/4763 cut-off events. For 895434/895441 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27060 event pairs, 770 based on Foata normal form. 8/4766 useless extension candidates. Maximal degree in co-relation 49590. Up to 4286 conditions per place. [2024-06-14 12:33:41,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 260 selfloop transitions, 91 changer transitions 0/375 dead transitions. [2024-06-14 12:33:41,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 375 transitions, 5023 flow [2024-06-14 12:33:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:33:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:33:41,422 INFO L175 Difference]: Start difference. First operand has 281 places, 353 transitions, 3849 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:33:41,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 375 transitions, 5023 flow [2024-06-14 12:33:42,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 375 transitions, 4861 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:42,682 INFO L231 Difference]: Finished difference. Result has 285 places, 359 transitions, 4123 flow [2024-06-14 12:33:42,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4123, PETRI_PLACES=285, PETRI_TRANSITIONS=359} [2024-06-14 12:33:42,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 12:33:42,683 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 359 transitions, 4123 flow [2024-06-14 12:33:42,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:42,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:42,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:33:42,683 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)] === [2024-06-14 12:33:42,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1713477472, now seen corresponding path program 1 times [2024-06-14 12:33:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:42,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961510771] [2024-06-14 12:33:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:43,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961510771] [2024-06-14 12:33:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961510771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:43,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:43,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170524295] [2024-06-14 12:33:43,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:43,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:43,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:43,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 359 transitions, 4123 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:43,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:43,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:43,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:44,756 INFO L124 PetriNetUnfolderBase]: 3024/4775 cut-off events. [2024-06-14 12:33:44,756 INFO L125 PetriNetUnfolderBase]: For 918788/918791 co-relation queries the response was YES. [2024-06-14 12:33:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50106 conditions, 4775 events. 3024/4775 cut-off events. For 918788/918791 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27199 event pairs, 602 based on Foata normal form. 5/4775 useless extension candidates. Maximal degree in co-relation 49970. Up to 4426 conditions per place. [2024-06-14 12:33:44,823 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 334 selfloop transitions, 28 changer transitions 0/386 dead transitions. [2024-06-14 12:33:44,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 386 transitions, 4995 flow [2024-06-14 12:33:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:33:44,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:33:44,824 INFO L175 Difference]: Start difference. First operand has 285 places, 359 transitions, 4123 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:33:44,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 386 transitions, 4995 flow [2024-06-14 12:33:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 386 transitions, 4806 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:46,520 INFO L231 Difference]: Finished difference. Result has 289 places, 361 transitions, 4067 flow [2024-06-14 12:33:46,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4067, PETRI_PLACES=289, PETRI_TRANSITIONS=361} [2024-06-14 12:33:46,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 12:33:46,520 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 361 transitions, 4067 flow [2024-06-14 12:33:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:46,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:46,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:46,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:33:46,521 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)] === [2024-06-14 12:33:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1713774142, now seen corresponding path program 2 times [2024-06-14 12:33:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200009000] [2024-06-14 12:33:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:47,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:47,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200009000] [2024-06-14 12:33:47,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200009000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:47,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317848455] [2024-06-14 12:33:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:47,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:47,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 361 transitions, 4067 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:47,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:47,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:47,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:48,671 INFO L124 PetriNetUnfolderBase]: 3032/4787 cut-off events. [2024-06-14 12:33:48,672 INFO L125 PetriNetUnfolderBase]: For 936685/936688 co-relation queries the response was YES. [2024-06-14 12:33:48,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50571 conditions, 4787 events. 3032/4787 cut-off events. For 936685/936688 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27276 event pairs, 737 based on Foata normal form. 5/4787 useless extension candidates. Maximal degree in co-relation 50433. Up to 4475 conditions per place. [2024-06-14 12:33:48,737 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2024-06-14 12:33:48,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 384 transitions, 4925 flow [2024-06-14 12:33:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:33:48,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:33:48,738 INFO L175 Difference]: Start difference. First operand has 289 places, 361 transitions, 4067 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:33:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 384 transitions, 4925 flow [2024-06-14 12:33:50,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 384 transitions, 4808 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:50,534 INFO L231 Difference]: Finished difference. Result has 291 places, 363 transitions, 4089 flow [2024-06-14 12:33:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4089, PETRI_PLACES=291, PETRI_TRANSITIONS=363} [2024-06-14 12:33:50,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:33:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 363 transitions, 4089 flow [2024-06-14 12:33:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:33:50,535 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)] === [2024-06-14 12:33:50,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -39931630, now seen corresponding path program 3 times [2024-06-14 12:33:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271497069] [2024-06-14 12:33:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271497069] [2024-06-14 12:33:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271497069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:51,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353432611] [2024-06-14 12:33:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:51,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:51,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:51,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 363 transitions, 4089 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:51,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:51,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:52,709 INFO L124 PetriNetUnfolderBase]: 3064/4836 cut-off events. [2024-06-14 12:33:52,709 INFO L125 PetriNetUnfolderBase]: For 958576/958579 co-relation queries the response was YES. [2024-06-14 12:33:52,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51191 conditions, 4836 events. 3064/4836 cut-off events. For 958576/958579 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27516 event pairs, 746 based on Foata normal form. 5/4836 useless extension candidates. Maximal degree in co-relation 51052. Up to 4506 conditions per place. [2024-06-14 12:33:52,774 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 325 selfloop transitions, 44 changer transitions 0/393 dead transitions. [2024-06-14 12:33:52,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 393 transitions, 5112 flow [2024-06-14 12:33:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:33:52,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:33:52,776 INFO L175 Difference]: Start difference. First operand has 291 places, 363 transitions, 4089 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:33:52,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 393 transitions, 5112 flow [2024-06-14 12:33:54,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 393 transitions, 4963 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:54,378 INFO L231 Difference]: Finished difference. Result has 296 places, 379 transitions, 4313 flow [2024-06-14 12:33:54,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4313, PETRI_PLACES=296, PETRI_TRANSITIONS=379} [2024-06-14 12:33:54,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 12:33:54,378 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 379 transitions, 4313 flow [2024-06-14 12:33:54,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:54,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:54,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:33:54,379 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)] === [2024-06-14 12:33:54,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1723974568, now seen corresponding path program 1 times [2024-06-14 12:33:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318300532] [2024-06-14 12:33:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:55,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318300532] [2024-06-14 12:33:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318300532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664571101] [2024-06-14 12:33:55,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:55,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:55,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:55,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 379 transitions, 4313 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:55,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:55,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:55,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:56,536 INFO L124 PetriNetUnfolderBase]: 2954/4678 cut-off events. [2024-06-14 12:33:56,536 INFO L125 PetriNetUnfolderBase]: For 962105/962153 co-relation queries the response was YES. [2024-06-14 12:33:56,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50258 conditions, 4678 events. 2954/4678 cut-off events. For 962105/962153 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26665 event pairs, 739 based on Foata normal form. 20/4665 useless extension candidates. Maximal degree in co-relation 50116. Up to 4288 conditions per place. [2024-06-14 12:33:56,596 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 295 selfloop transitions, 57 changer transitions 0/398 dead transitions. [2024-06-14 12:33:56,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 398 transitions, 5143 flow [2024-06-14 12:33:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:33:56,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:33:56,597 INFO L175 Difference]: Start difference. First operand has 296 places, 379 transitions, 4313 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:33:56,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 398 transitions, 5143 flow [2024-06-14 12:33:58,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 398 transitions, 5038 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-14 12:33:58,612 INFO L231 Difference]: Finished difference. Result has 303 places, 382 transitions, 4412 flow [2024-06-14 12:33:58,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4412, PETRI_PLACES=303, PETRI_TRANSITIONS=382} [2024-06-14 12:33:58,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-14 12:33:58,612 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 382 transitions, 4412 flow [2024-06-14 12:33:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:58,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:58,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:58,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:33:58,613 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)] === [2024-06-14 12:33:58,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash 210118734, now seen corresponding path program 4 times [2024-06-14 12:33:58,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:58,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994392506] [2024-06-14 12:33:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994392506] [2024-06-14 12:33:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994392506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:59,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:59,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:59,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187594170] [2024-06-14 12:33:59,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:59,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:59,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:59,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 382 transitions, 4412 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:59,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:59,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:59,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:00,649 INFO L124 PetriNetUnfolderBase]: 3084/4870 cut-off events. [2024-06-14 12:34:00,649 INFO L125 PetriNetUnfolderBase]: For 987313/987322 co-relation queries the response was YES. [2024-06-14 12:34:00,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52266 conditions, 4870 events. 3084/4870 cut-off events. For 987313/987322 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27669 event pairs, 726 based on Foata normal form. 11/4876 useless extension candidates. Maximal degree in co-relation 52122. Up to 4459 conditions per place. [2024-06-14 12:34:00,719 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 330 selfloop transitions, 57 changer transitions 0/411 dead transitions. [2024-06-14 12:34:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 411 transitions, 5384 flow [2024-06-14 12:34:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:34:00,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:34:00,720 INFO L175 Difference]: Start difference. First operand has 303 places, 382 transitions, 4412 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:34:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 411 transitions, 5384 flow [2024-06-14 12:34:02,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 411 transitions, 5202 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:02,709 INFO L231 Difference]: Finished difference. Result has 306 places, 391 transitions, 4507 flow [2024-06-14 12:34:02,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4507, PETRI_PLACES=306, PETRI_TRANSITIONS=391} [2024-06-14 12:34:02,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 12:34:02,710 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 391 transitions, 4507 flow [2024-06-14 12:34:02,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:02,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:02,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:02,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:34:02,710 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)] === [2024-06-14 12:34:02,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1032423306, now seen corresponding path program 5 times [2024-06-14 12:34:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:02,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912109680] [2024-06-14 12:34:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:03,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:03,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912109680] [2024-06-14 12:34:03,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912109680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:03,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:03,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:03,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198058357] [2024-06-14 12:34:03,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:03,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:03,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:03,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:03,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:03,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 391 transitions, 4507 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:03,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:03,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:03,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:04,775 INFO L124 PetriNetUnfolderBase]: 3115/4916 cut-off events. [2024-06-14 12:34:04,775 INFO L125 PetriNetUnfolderBase]: For 1024711/1024722 co-relation queries the response was YES. [2024-06-14 12:34:04,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53814 conditions, 4916 events. 3115/4916 cut-off events. For 1024711/1024722 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27951 event pairs, 715 based on Foata normal form. 11/4917 useless extension candidates. Maximal degree in co-relation 53667. Up to 4473 conditions per place. [2024-06-14 12:34:04,844 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 68 changer transitions 0/416 dead transitions. [2024-06-14 12:34:04,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 416 transitions, 5745 flow [2024-06-14 12:34:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:34:04,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:34:04,846 INFO L175 Difference]: Start difference. First operand has 306 places, 391 transitions, 4507 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:34:04,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 416 transitions, 5745 flow [2024-06-14 12:34:06,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 416 transitions, 5616 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:06,937 INFO L231 Difference]: Finished difference. Result has 312 places, 397 transitions, 4732 flow [2024-06-14 12:34:06,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4732, PETRI_PLACES=312, PETRI_TRANSITIONS=397} [2024-06-14 12:34:06,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 12:34:06,938 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 397 transitions, 4732 flow [2024-06-14 12:34:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:06,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:06,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:34:06,939 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)] === [2024-06-14 12:34:06,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1094000206, now seen corresponding path program 7 times [2024-06-14 12:34:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409616804] [2024-06-14 12:34:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:06,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:07,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409616804] [2024-06-14 12:34:07,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409616804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:07,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:07,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:07,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462273288] [2024-06-14 12:34:07,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:07,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:07,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:07,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 397 transitions, 4732 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:07,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:07,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:07,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:09,036 INFO L124 PetriNetUnfolderBase]: 3115/4912 cut-off events. [2024-06-14 12:34:09,036 INFO L125 PetriNetUnfolderBase]: For 1036570/1036573 co-relation queries the response was YES. [2024-06-14 12:34:09,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54393 conditions, 4912 events. 3115/4912 cut-off events. For 1036570/1036573 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27928 event pairs, 741 based on Foata normal form. 4/4911 useless extension candidates. Maximal degree in co-relation 54244. Up to 4497 conditions per place. [2024-06-14 12:34:09,107 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 56 changer transitions 0/419 dead transitions. [2024-06-14 12:34:09,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 419 transitions, 5697 flow [2024-06-14 12:34:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:09,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:34:09,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:34:09,109 INFO L175 Difference]: Start difference. First operand has 312 places, 397 transitions, 4732 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:34:09,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 419 transitions, 5697 flow [2024-06-14 12:34:11,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 419 transitions, 5481 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:11,604 INFO L231 Difference]: Finished difference. Result has 315 places, 400 transitions, 4750 flow [2024-06-14 12:34:11,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4750, PETRI_PLACES=315, PETRI_TRANSITIONS=400} [2024-06-14 12:34:11,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 12:34:11,605 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 400 transitions, 4750 flow [2024-06-14 12:34:11,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:11,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:11,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:34:11,605 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)] === [2024-06-14 12:34:11,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 793094316, now seen corresponding path program 6 times [2024-06-14 12:34:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848554919] [2024-06-14 12:34:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:12,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848554919] [2024-06-14 12:34:12,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848554919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:12,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:12,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:12,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374734774] [2024-06-14 12:34:12,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:12,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:12,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:12,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:12,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 400 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:12,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:12,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:12,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:13,850 INFO L124 PetriNetUnfolderBase]: 3109/4912 cut-off events. [2024-06-14 12:34:13,850 INFO L125 PetriNetUnfolderBase]: For 1048136/1048145 co-relation queries the response was YES. [2024-06-14 12:34:13,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53600 conditions, 4912 events. 3109/4912 cut-off events. For 1048136/1048145 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28018 event pairs, 718 based on Foata normal form. 11/4918 useless extension candidates. Maximal degree in co-relation 53450. Up to 4494 conditions per place. [2024-06-14 12:34:13,915 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 345 selfloop transitions, 52 changer transitions 0/421 dead transitions. [2024-06-14 12:34:13,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 421 transitions, 5621 flow [2024-06-14 12:34:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:34:13,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:34:13,916 INFO L175 Difference]: Start difference. First operand has 315 places, 400 transitions, 4750 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:34:13,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 421 transitions, 5621 flow [2024-06-14 12:34:16,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 421 transitions, 5367 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:16,327 INFO L231 Difference]: Finished difference. Result has 317 places, 400 transitions, 4606 flow [2024-06-14 12:34:16,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4606, PETRI_PLACES=317, PETRI_TRANSITIONS=400} [2024-06-14 12:34:16,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:34:16,328 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 400 transitions, 4606 flow [2024-06-14 12:34:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:16,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:16,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:34:16,329 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)] === [2024-06-14 12:34:16,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash 793214286, now seen corresponding path program 7 times [2024-06-14 12:34:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:16,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177251676] [2024-06-14 12:34:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177251676] [2024-06-14 12:34:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177251676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986644619] [2024-06-14 12:34:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:17,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:17,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 400 transitions, 4606 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:17,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:17,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:17,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:18,279 INFO L124 PetriNetUnfolderBase]: 3111/4910 cut-off events. [2024-06-14 12:34:18,280 INFO L125 PetriNetUnfolderBase]: For 1061333/1061342 co-relation queries the response was YES. [2024-06-14 12:34:18,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53567 conditions, 4910 events. 3111/4910 cut-off events. For 1061333/1061342 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27926 event pairs, 728 based on Foata normal form. 11/4916 useless extension candidates. Maximal degree in co-relation 53416. Up to 4471 conditions per place. [2024-06-14 12:34:18,352 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 335 selfloop transitions, 64 changer transitions 0/423 dead transitions. [2024-06-14 12:34:18,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 423 transitions, 5773 flow [2024-06-14 12:34:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:34:18,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:34:18,354 INFO L175 Difference]: Start difference. First operand has 317 places, 400 transitions, 4606 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:34:18,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 423 transitions, 5773 flow [2024-06-14 12:34:20,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 423 transitions, 5629 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:34:20,514 INFO L231 Difference]: Finished difference. Result has 317 places, 403 transitions, 4691 flow [2024-06-14 12:34:20,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4691, PETRI_PLACES=317, PETRI_TRANSITIONS=403} [2024-06-14 12:34:20,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:34:20,515 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 403 transitions, 4691 flow [2024-06-14 12:34:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:20,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:20,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:34:20,516 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)] === [2024-06-14 12:34:20,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 793214472, now seen corresponding path program 4 times [2024-06-14 12:34:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:20,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440367760] [2024-06-14 12:34:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:21,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440367760] [2024-06-14 12:34:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440367760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:21,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:21,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704352547] [2024-06-14 12:34:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:21,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:21,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:21,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:21,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 403 transitions, 4691 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:21,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:21,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:21,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:22,474 INFO L124 PetriNetUnfolderBase]: 3186/4988 cut-off events. [2024-06-14 12:34:22,474 INFO L125 PetriNetUnfolderBase]: For 1065000/1065006 co-relation queries the response was YES. [2024-06-14 12:34:22,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53958 conditions, 4988 events. 3186/4988 cut-off events. For 1065000/1065006 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28044 event pairs, 760 based on Foata normal form. 7/4994 useless extension candidates. Maximal degree in co-relation 53808. Up to 4776 conditions per place. [2024-06-14 12:34:22,549 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 41 changer transitions 0/420 dead transitions. [2024-06-14 12:34:22,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 420 transitions, 5598 flow [2024-06-14 12:34:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:34:22,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:34:22,550 INFO L175 Difference]: Start difference. First operand has 317 places, 403 transitions, 4691 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:34:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 420 transitions, 5598 flow [2024-06-14 12:34:25,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 420 transitions, 5244 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:25,435 INFO L231 Difference]: Finished difference. Result has 318 places, 404 transitions, 4450 flow [2024-06-14 12:34:25,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4450, PETRI_PLACES=318, PETRI_TRANSITIONS=404} [2024-06-14 12:34:25,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 12:34:25,436 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 404 transitions, 4450 flow [2024-06-14 12:34:25,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:25,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:25,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:25,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:34:25,437 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)] === [2024-06-14 12:34:25,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash 793214100, now seen corresponding path program 8 times [2024-06-14 12:34:25,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:25,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627802573] [2024-06-14 12:34:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:25,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627802573] [2024-06-14 12:34:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627802573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:26,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:26,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982913673] [2024-06-14 12:34:26,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:26,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:26,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 404 transitions, 4450 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:26,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:26,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:26,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:27,445 INFO L124 PetriNetUnfolderBase]: 3105/4894 cut-off events. [2024-06-14 12:34:27,446 INFO L125 PetriNetUnfolderBase]: For 1082660/1082663 co-relation queries the response was YES. [2024-06-14 12:34:27,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53142 conditions, 4894 events. 3105/4894 cut-off events. For 1082660/1082663 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27766 event pairs, 750 based on Foata normal form. 4/4893 useless extension candidates. Maximal degree in co-relation 52992. Up to 4474 conditions per place. [2024-06-14 12:34:27,518 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 63 changer transitions 0/421 dead transitions. [2024-06-14 12:34:27,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 421 transitions, 5303 flow [2024-06-14 12:34:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:34:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:34:27,519 INFO L175 Difference]: Start difference. First operand has 318 places, 404 transitions, 4450 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:34:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 421 transitions, 5303 flow [2024-06-14 12:34:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 421 transitions, 5156 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:30,287 INFO L231 Difference]: Finished difference. Result has 320 places, 404 transitions, 4436 flow [2024-06-14 12:34:30,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4436, PETRI_PLACES=320, PETRI_TRANSITIONS=404} [2024-06-14 12:34:30,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 12:34:30,288 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 404 transitions, 4436 flow [2024-06-14 12:34:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:30,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:30,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:30,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:34:30,289 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)] === [2024-06-14 12:34:30,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1147714476, now seen corresponding path program 8 times [2024-06-14 12:34:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:30,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718645927] [2024-06-14 12:34:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:30,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:31,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:31,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718645927] [2024-06-14 12:34:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718645927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:31,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:31,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:31,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404058761] [2024-06-14 12:34:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:31,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:31,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:31,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 404 transitions, 4436 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:31,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:31,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:31,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:32,279 INFO L124 PetriNetUnfolderBase]: 3142/4947 cut-off events. [2024-06-14 12:34:32,279 INFO L125 PetriNetUnfolderBase]: For 1131593/1131604 co-relation queries the response was YES. [2024-06-14 12:34:32,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54504 conditions, 4947 events. 3142/4947 cut-off events. For 1131593/1131604 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28137 event pairs, 735 based on Foata normal form. 11/4948 useless extension candidates. Maximal degree in co-relation 54353. Up to 4439 conditions per place. [2024-06-14 12:34:32,352 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 304 selfloop transitions, 103 changer transitions 0/431 dead transitions. [2024-06-14 12:34:32,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 431 transitions, 6034 flow [2024-06-14 12:34:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:34:32,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:34:32,354 INFO L175 Difference]: Start difference. First operand has 320 places, 404 transitions, 4436 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:34:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 431 transitions, 6034 flow [2024-06-14 12:34:35,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 431 transitions, 5809 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:35,705 INFO L231 Difference]: Finished difference. Result has 321 places, 413 transitions, 4735 flow [2024-06-14 12:34:35,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4211, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4735, PETRI_PLACES=321, PETRI_TRANSITIONS=413} [2024-06-14 12:34:35,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 12:34:35,706 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 413 transitions, 4735 flow [2024-06-14 12:34:35,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:35,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:35,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:35,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:34:35,707 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)] === [2024-06-14 12:34:35,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash -32784842, now seen corresponding path program 9 times [2024-06-14 12:34:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:35,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551174141] [2024-06-14 12:34:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:36,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551174141] [2024-06-14 12:34:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551174141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:36,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971075534] [2024-06-14 12:34:36,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:36,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:36,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:36,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:36,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 413 transitions, 4735 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:36,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:36,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:36,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:37,901 INFO L124 PetriNetUnfolderBase]: 3144/4950 cut-off events. [2024-06-14 12:34:37,902 INFO L125 PetriNetUnfolderBase]: For 1147931/1147934 co-relation queries the response was YES. [2024-06-14 12:34:37,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55116 conditions, 4950 events. 3144/4950 cut-off events. For 1147931/1147934 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28131 event pairs, 754 based on Foata normal form. 4/4949 useless extension candidates. Maximal degree in co-relation 54964. Up to 4495 conditions per place. [2024-06-14 12:34:37,970 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 321 selfloop transitions, 84 changer transitions 0/429 dead transitions. [2024-06-14 12:34:37,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 429 transitions, 5721 flow [2024-06-14 12:34:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:34:37,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:34:37,971 INFO L175 Difference]: Start difference. First operand has 321 places, 413 transitions, 4735 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:34:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 429 transitions, 5721 flow [2024-06-14 12:34:40,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 429 transitions, 5557 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:40,593 INFO L231 Difference]: Finished difference. Result has 326 places, 416 transitions, 4887 flow [2024-06-14 12:34:40,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4887, PETRI_PLACES=326, PETRI_TRANSITIONS=416} [2024-06-14 12:34:40,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:34:40,594 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 416 transitions, 4887 flow [2024-06-14 12:34:40,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:40,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:40,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:40,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:34:40,595 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)] === [2024-06-14 12:34:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 325974600, now seen corresponding path program 5 times [2024-06-14 12:34:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981982969] [2024-06-14 12:34:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:41,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:41,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981982969] [2024-06-14 12:34:41,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981982969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:41,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298176106] [2024-06-14 12:34:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:41,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 416 transitions, 4887 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:42,854 INFO L124 PetriNetUnfolderBase]: 3235/5053 cut-off events. [2024-06-14 12:34:42,855 INFO L125 PetriNetUnfolderBase]: For 1170169/1170175 co-relation queries the response was YES. [2024-06-14 12:34:42,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56463 conditions, 5053 events. 3235/5053 cut-off events. For 1170169/1170175 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28438 event pairs, 774 based on Foata normal form. 7/5059 useless extension candidates. Maximal degree in co-relation 56309. Up to 4812 conditions per place. [2024-06-14 12:34:42,925 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 366 selfloop transitions, 66 changer transitions 0/436 dead transitions. [2024-06-14 12:34:42,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 436 transitions, 6205 flow [2024-06-14 12:34:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:34:42,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:34:42,926 INFO L175 Difference]: Start difference. First operand has 326 places, 416 transitions, 4887 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:34:42,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 436 transitions, 6205 flow [2024-06-14 12:34:46,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 436 transitions, 5911 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:46,021 INFO L231 Difference]: Finished difference. Result has 328 places, 422 transitions, 4937 flow [2024-06-14 12:34:46,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4937, PETRI_PLACES=328, PETRI_TRANSITIONS=422} [2024-06-14 12:34:46,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-14 12:34:46,022 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 422 transitions, 4937 flow [2024-06-14 12:34:46,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:46,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:46,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:46,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:34:46,023 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)] === [2024-06-14 12:34:46,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 325558890, now seen corresponding path program 6 times [2024-06-14 12:34:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:46,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541649013] [2024-06-14 12:34:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:46,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:46,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:46,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541649013] [2024-06-14 12:34:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541649013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:46,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:46,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143219929] [2024-06-14 12:34:46,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:46,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:46,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:47,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 422 transitions, 4937 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:47,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:47,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:47,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:48,232 INFO L124 PetriNetUnfolderBase]: 3232/5049 cut-off events. [2024-06-14 12:34:48,233 INFO L125 PetriNetUnfolderBase]: For 1188445/1188451 co-relation queries the response was YES. [2024-06-14 12:34:48,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56602 conditions, 5049 events. 3232/5049 cut-off events. For 1188445/1188451 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28385 event pairs, 774 based on Foata normal form. 7/5055 useless extension candidates. Maximal degree in co-relation 56447. Up to 4809 conditions per place. [2024-06-14 12:34:48,310 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 61 changer transitions 0/435 dead transitions. [2024-06-14 12:34:48,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 435 transitions, 5839 flow [2024-06-14 12:34:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:34:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:34:48,312 INFO L175 Difference]: Start difference. First operand has 328 places, 422 transitions, 4937 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:34:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 435 transitions, 5839 flow [2024-06-14 12:34:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 435 transitions, 5613 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:51,338 INFO L231 Difference]: Finished difference. Result has 332 places, 422 transitions, 4839 flow [2024-06-14 12:34:51,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4839, PETRI_PLACES=332, PETRI_TRANSITIONS=422} [2024-06-14 12:34:51,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 12:34:51,338 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 422 transitions, 4839 flow [2024-06-14 12:34:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:51,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:51,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:34:51,339 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)] === [2024-06-14 12:34:51,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 325558704, now seen corresponding path program 9 times [2024-06-14 12:34:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672980982] [2024-06-14 12:34:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:52,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672980982] [2024-06-14 12:34:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672980982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:52,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:52,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:52,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298643023] [2024-06-14 12:34:52,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:52,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:52,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:52,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 422 transitions, 4839 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:52,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:52,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:53,491 INFO L124 PetriNetUnfolderBase]: 3151/4962 cut-off events. [2024-06-14 12:34:53,492 INFO L125 PetriNetUnfolderBase]: For 1214292/1214303 co-relation queries the response was YES. [2024-06-14 12:34:53,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56252 conditions, 4962 events. 3151/4962 cut-off events. For 1214292/1214303 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28257 event pairs, 732 based on Foata normal form. 11/4963 useless extension candidates. Maximal degree in co-relation 56095. Up to 4451 conditions per place. [2024-06-14 12:34:53,569 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 100 changer transitions 0/440 dead transitions. [2024-06-14 12:34:53,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 440 transitions, 6161 flow [2024-06-14 12:34:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:34:53,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:34:53,570 INFO L175 Difference]: Start difference. First operand has 332 places, 422 transitions, 4839 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:34:53,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 440 transitions, 6161 flow [2024-06-14 12:34:56,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 440 transitions, 5930 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:56,572 INFO L231 Difference]: Finished difference. Result has 333 places, 422 transitions, 4814 flow [2024-06-14 12:34:56,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4814, PETRI_PLACES=333, PETRI_TRANSITIONS=422} [2024-06-14 12:34:56,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 12:34:56,573 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 422 transitions, 4814 flow [2024-06-14 12:34:56,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:56,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:56,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:34:56,574 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)] === [2024-06-14 12:34:56,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1426873936, now seen corresponding path program 10 times [2024-06-14 12:34:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399629553] [2024-06-14 12:34:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:57,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399629553] [2024-06-14 12:34:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399629553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:57,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:57,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170006271] [2024-06-14 12:34:57,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:57,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:57,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:57,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:57,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 422 transitions, 4814 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:57,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:57,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:57,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:58,673 INFO L124 PetriNetUnfolderBase]: 3159/4980 cut-off events. [2024-06-14 12:34:58,674 INFO L125 PetriNetUnfolderBase]: For 1236827/1236840 co-relation queries the response was YES. [2024-06-14 12:34:58,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56657 conditions, 4980 events. 3159/4980 cut-off events. For 1236827/1236840 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28445 event pairs, 775 based on Foata normal form. 11/4981 useless extension candidates. Maximal degree in co-relation 56499. Up to 4397 conditions per place. [2024-06-14 12:34:58,749 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 286 selfloop transitions, 131 changer transitions 0/443 dead transitions. [2024-06-14 12:34:58,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 443 transitions, 6358 flow [2024-06-14 12:34:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:34:58,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:34:58,751 INFO L175 Difference]: Start difference. First operand has 333 places, 422 transitions, 4814 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:34:58,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 443 transitions, 6358 flow [2024-06-14 12:35:01,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 443 transitions, 6131 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:01,263 INFO L231 Difference]: Finished difference. Result has 335 places, 428 transitions, 5085 flow [2024-06-14 12:35:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5085, PETRI_PLACES=335, PETRI_TRANSITIONS=428} [2024-06-14 12:35:01,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 12:35:01,263 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 428 transitions, 5085 flow [2024-06-14 12:35:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:01,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:01,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:35:01,264 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)] === [2024-06-14 12:35:01,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1673472204, now seen corresponding path program 7 times [2024-06-14 12:35:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773845101] [2024-06-14 12:35:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773845101] [2024-06-14 12:35:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773845101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:02,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:02,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:02,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100946313] [2024-06-14 12:35:02,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:02,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:02,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:02,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:02,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 428 transitions, 5085 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:02,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:02,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:02,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:03,307 INFO L124 PetriNetUnfolderBase]: 3249/5077 cut-off events. [2024-06-14 12:35:03,308 INFO L125 PetriNetUnfolderBase]: For 1251437/1251447 co-relation queries the response was YES. [2024-06-14 12:35:03,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57889 conditions, 5077 events. 3249/5077 cut-off events. For 1251437/1251447 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28604 event pairs, 785 based on Foata normal form. 11/5087 useless extension candidates. Maximal degree in co-relation 57730. Up to 4751 conditions per place. [2024-06-14 12:35:03,381 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 345 selfloop transitions, 104 changer transitions 0/453 dead transitions. [2024-06-14 12:35:03,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 453 transitions, 6805 flow [2024-06-14 12:35:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:35:03,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:35:03,383 INFO L175 Difference]: Start difference. First operand has 335 places, 428 transitions, 5085 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:35:03,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 453 transitions, 6805 flow [2024-06-14 12:35:05,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 453 transitions, 6457 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:05,867 INFO L231 Difference]: Finished difference. Result has 339 places, 441 transitions, 5341 flow [2024-06-14 12:35:05,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5341, PETRI_PLACES=339, PETRI_TRANSITIONS=441} [2024-06-14 12:35:05,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-14 12:35:05,867 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 441 transitions, 5341 flow [2024-06-14 12:35:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:05,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:05,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:05,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:35:05,868 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)] === [2024-06-14 12:35:05,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:05,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1673471832, now seen corresponding path program 10 times [2024-06-14 12:35:05,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:05,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621700534] [2024-06-14 12:35:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:05,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:06,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:06,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621700534] [2024-06-14 12:35:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621700534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:06,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:06,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497163016] [2024-06-14 12:35:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:06,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:06,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:06,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 441 transitions, 5341 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:06,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:06,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:06,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:07,986 INFO L124 PetriNetUnfolderBase]: 3188/5015 cut-off events. [2024-06-14 12:35:07,987 INFO L125 PetriNetUnfolderBase]: For 1276460/1276464 co-relation queries the response was YES. [2024-06-14 12:35:08,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57575 conditions, 5015 events. 3188/5015 cut-off events. For 1276460/1276464 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28535 event pairs, 781 based on Foata normal form. 5/5019 useless extension candidates. Maximal degree in co-relation 57414. Up to 4462 conditions per place. [2024-06-14 12:35:08,063 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 124 changer transitions 0/462 dead transitions. [2024-06-14 12:35:08,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 462 transitions, 7111 flow [2024-06-14 12:35:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:35:08,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:35:08,064 INFO L175 Difference]: Start difference. First operand has 339 places, 441 transitions, 5341 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:35:08,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 462 transitions, 7111 flow [2024-06-14 12:35:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 462 transitions, 6874 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:10,859 INFO L231 Difference]: Finished difference. Result has 344 places, 450 transitions, 5796 flow [2024-06-14 12:35:10,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5104, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5796, PETRI_PLACES=344, PETRI_TRANSITIONS=450} [2024-06-14 12:35:10,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 12:35:10,863 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 450 transitions, 5796 flow [2024-06-14 12:35:10,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:10,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:10,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:10,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:35:10,863 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)] === [2024-06-14 12:35:10,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1673351862, now seen corresponding path program 11 times [2024-06-14 12:35:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:10,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30676129] [2024-06-14 12:35:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30676129] [2024-06-14 12:35:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30676129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601653372] [2024-06-14 12:35:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:11,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:11,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:11,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 450 transitions, 5796 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:11,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:11,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:11,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:13,076 INFO L124 PetriNetUnfolderBase]: 3186/5013 cut-off events. [2024-06-14 12:35:13,076 INFO L125 PetriNetUnfolderBase]: For 1295783/1295783 co-relation queries the response was YES. [2024-06-14 12:35:13,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58046 conditions, 5013 events. 3186/5013 cut-off events. For 1295783/1295783 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28523 event pairs, 754 based on Foata normal form. 1/5013 useless extension candidates. Maximal degree in co-relation 57883. Up to 4650 conditions per place. [2024-06-14 12:35:13,147 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 56 changer transitions 0/460 dead transitions. [2024-06-14 12:35:13,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 460 transitions, 6682 flow [2024-06-14 12:35:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:35:13,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:35:13,148 INFO L175 Difference]: Start difference. First operand has 344 places, 450 transitions, 5796 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:35:13,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 460 transitions, 6682 flow [2024-06-14 12:35:15,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 460 transitions, 6192 flow, removed 148 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:15,912 INFO L231 Difference]: Finished difference. Result has 348 places, 450 transitions, 5424 flow [2024-06-14 12:35:15,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5424, PETRI_PLACES=348, PETRI_TRANSITIONS=450} [2024-06-14 12:35:15,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 12:35:15,912 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 450 transitions, 5424 flow [2024-06-14 12:35:15,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:15,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:15,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:15,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:35:15,913 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)] === [2024-06-14 12:35:15,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2078920584, now seen corresponding path program 8 times [2024-06-14 12:35:15,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050822223] [2024-06-14 12:35:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:15,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:16,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050822223] [2024-06-14 12:35:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050822223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236391664] [2024-06-14 12:35:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:16,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 450 transitions, 5424 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:16,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:18,404 INFO L124 PetriNetUnfolderBase]: 3264/5098 cut-off events. [2024-06-14 12:35:18,405 INFO L125 PetriNetUnfolderBase]: For 1304431/1304441 co-relation queries the response was YES. [2024-06-14 12:35:18,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57911 conditions, 5098 events. 3264/5098 cut-off events. For 1304431/1304441 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28739 event pairs, 782 based on Foata normal form. 11/5108 useless extension candidates. Maximal degree in co-relation 57747. Up to 4771 conditions per place. [2024-06-14 12:35:18,476 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 342 selfloop transitions, 119 changer transitions 0/465 dead transitions. [2024-06-14 12:35:18,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 465 transitions, 6921 flow [2024-06-14 12:35:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:35:18,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:35:18,478 INFO L175 Difference]: Start difference. First operand has 348 places, 450 transitions, 5424 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:35:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 465 transitions, 6921 flow [2024-06-14 12:35:21,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 465 transitions, 6693 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:35:21,953 INFO L231 Difference]: Finished difference. Result has 347 places, 453 transitions, 5531 flow [2024-06-14 12:35:21,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=347, PETRI_TRANSITIONS=453} [2024-06-14 12:35:21,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 12:35:21,953 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 453 transitions, 5531 flow [2024-06-14 12:35:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:21,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:21,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:21,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:35:21,954 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)] === [2024-06-14 12:35:21,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1673478714, now seen corresponding path program 9 times [2024-06-14 12:35:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22505332] [2024-06-14 12:35:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:22,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22505332] [2024-06-14 12:35:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22505332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:22,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590787571] [2024-06-14 12:35:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:22,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:22,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:23,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:23,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 453 transitions, 5531 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:23,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:23,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:23,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:24,203 INFO L124 PetriNetUnfolderBase]: 3277/5116 cut-off events. [2024-06-14 12:35:24,203 INFO L125 PetriNetUnfolderBase]: For 1333651/1333661 co-relation queries the response was YES. [2024-06-14 12:35:24,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58510 conditions, 5116 events. 3277/5116 cut-off events. For 1333651/1333661 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28901 event pairs, 782 based on Foata normal form. 11/5126 useless extension candidates. Maximal degree in co-relation 58346. Up to 4786 conditions per place. [2024-06-14 12:35:24,290 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 114 changer transitions 0/471 dead transitions. [2024-06-14 12:35:24,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 471 transitions, 7136 flow [2024-06-14 12:35:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:35:24,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:35:24,291 INFO L175 Difference]: Start difference. First operand has 347 places, 453 transitions, 5531 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:35:24,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 471 transitions, 7136 flow [2024-06-14 12:35:28,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 471 transitions, 6861 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:28,078 INFO L231 Difference]: Finished difference. Result has 351 places, 459 transitions, 5673 flow [2024-06-14 12:35:28,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5274, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5673, PETRI_PLACES=351, PETRI_TRANSITIONS=459} [2024-06-14 12:35:28,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 12:35:28,079 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 459 transitions, 5673 flow [2024-06-14 12:35:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:28,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:28,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:28,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:35:28,079 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)] === [2024-06-14 12:35:28,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -826256276, now seen corresponding path program 10 times [2024-06-14 12:35:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436448856] [2024-06-14 12:35:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:28,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436448856] [2024-06-14 12:35:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436448856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156909156] [2024-06-14 12:35:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:28,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:28,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 459 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:28,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:28,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:28,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:30,130 INFO L124 PetriNetUnfolderBase]: 3274/5112 cut-off events. [2024-06-14 12:35:30,130 INFO L125 PetriNetUnfolderBase]: For 1348619/1348629 co-relation queries the response was YES. [2024-06-14 12:35:30,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58453 conditions, 5112 events. 3274/5112 cut-off events. For 1348619/1348629 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28853 event pairs, 780 based on Foata normal form. 11/5122 useless extension candidates. Maximal degree in co-relation 58288. Up to 4783 conditions per place. [2024-06-14 12:35:30,210 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 349 selfloop transitions, 120 changer transitions 0/473 dead transitions. [2024-06-14 12:35:30,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 473 transitions, 7159 flow [2024-06-14 12:35:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:35:30,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:35:30,212 INFO L175 Difference]: Start difference. First operand has 351 places, 459 transitions, 5673 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:35:30,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 473 transitions, 7159 flow [2024-06-14 12:35:33,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 473 transitions, 6917 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:33,959 INFO L231 Difference]: Finished difference. Result has 355 places, 461 transitions, 5733 flow [2024-06-14 12:35:33,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5733, PETRI_PLACES=355, PETRI_TRANSITIONS=461} [2024-06-14 12:35:33,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 12:35:33,960 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 461 transitions, 5733 flow [2024-06-14 12:35:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:33,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:33,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:33,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:35:33,961 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)] === [2024-06-14 12:35:33,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1685327844, now seen corresponding path program 11 times [2024-06-14 12:35:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:33,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818689226] [2024-06-14 12:35:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818689226] [2024-06-14 12:35:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818689226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945265380] [2024-06-14 12:35:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:34,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:34,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 461 transitions, 5733 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:34,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:34,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:34,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:36,149 INFO L124 PetriNetUnfolderBase]: 3271/5108 cut-off events. [2024-06-14 12:35:36,149 INFO L125 PetriNetUnfolderBase]: For 1363308/1363318 co-relation queries the response was YES. [2024-06-14 12:35:36,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58464 conditions, 5108 events. 3271/5108 cut-off events. For 1363308/1363318 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28839 event pairs, 782 based on Foata normal form. 11/5118 useless extension candidates. Maximal degree in co-relation 58298. Up to 4780 conditions per place. [2024-06-14 12:35:36,241 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 127 changer transitions 0/472 dead transitions. [2024-06-14 12:35:36,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 472 transitions, 6931 flow [2024-06-14 12:35:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:35:36,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:35:36,242 INFO L175 Difference]: Start difference. First operand has 355 places, 461 transitions, 5733 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:35:36,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 472 transitions, 6931 flow [2024-06-14 12:35:40,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 472 transitions, 6602 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:40,042 INFO L231 Difference]: Finished difference. Result has 359 places, 461 transitions, 5664 flow [2024-06-14 12:35:40,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5404, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5664, PETRI_PLACES=359, PETRI_TRANSITIONS=461} [2024-06-14 12:35:40,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 12:35:40,043 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 461 transitions, 5664 flow [2024-06-14 12:35:40,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:40,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:40,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:40,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:35:40,043 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)] === [2024-06-14 12:35:40,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1850840688, now seen corresponding path program 11 times [2024-06-14 12:35:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:40,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905073836] [2024-06-14 12:35:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:40,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:40,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:40,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905073836] [2024-06-14 12:35:40,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905073836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:40,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:40,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107800435] [2024-06-14 12:35:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:41,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:41,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 461 transitions, 5664 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:41,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:41,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:41,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:42,246 INFO L124 PetriNetUnfolderBase]: 3209/5054 cut-off events. [2024-06-14 12:35:42,246 INFO L125 PetriNetUnfolderBase]: For 1404083/1404093 co-relation queries the response was YES. [2024-06-14 12:35:42,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58605 conditions, 5054 events. 3209/5054 cut-off events. For 1404083/1404093 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28894 event pairs, 777 based on Foata normal form. 8/5056 useless extension candidates. Maximal degree in co-relation 58438. Up to 4451 conditions per place. [2024-06-14 12:35:42,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 308 selfloop transitions, 137 changer transitions 0/479 dead transitions. [2024-06-14 12:35:42,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 479 transitions, 7168 flow [2024-06-14 12:35:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:35:42,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:35:42,327 INFO L175 Difference]: Start difference. First operand has 359 places, 461 transitions, 5664 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:35:42,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 479 transitions, 7168 flow [2024-06-14 12:35:46,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 479 transitions, 6872 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:35:46,194 INFO L231 Difference]: Finished difference. Result has 359 places, 464 transitions, 5744 flow [2024-06-14 12:35:46,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5744, PETRI_PLACES=359, PETRI_TRANSITIONS=464} [2024-06-14 12:35:46,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 12:35:46,194 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 464 transitions, 5744 flow [2024-06-14 12:35:46,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:46,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:46,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:35:46,195 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)] === [2024-06-14 12:35:46,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1850603352, now seen corresponding path program 12 times [2024-06-14 12:35:46,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:46,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213519477] [2024-06-14 12:35:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:46,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:47,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:47,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213519477] [2024-06-14 12:35:47,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213519477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:47,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:47,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:47,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530936428] [2024-06-14 12:35:47,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:47,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:47,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:47,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:47,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:47,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 464 transitions, 5744 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:47,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:47,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:47,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:48,288 INFO L124 PetriNetUnfolderBase]: 3205/5041 cut-off events. [2024-06-14 12:35:48,288 INFO L125 PetriNetUnfolderBase]: For 1405544/1405548 co-relation queries the response was YES. [2024-06-14 12:35:48,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58519 conditions, 5041 events. 3205/5041 cut-off events. For 1405544/1405548 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28706 event pairs, 781 based on Foata normal form. 5/5045 useless extension candidates. Maximal degree in co-relation 58351. Up to 4483 conditions per place. [2024-06-14 12:35:48,368 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 310 selfloop transitions, 130 changer transitions 0/474 dead transitions. [2024-06-14 12:35:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 474 transitions, 6652 flow [2024-06-14 12:35:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:35:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:35:48,369 INFO L175 Difference]: Start difference. First operand has 359 places, 464 transitions, 5744 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:35:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 474 transitions, 6652 flow [2024-06-14 12:35:51,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 474 transitions, 6140 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:51,895 INFO L231 Difference]: Finished difference. Result has 361 places, 464 transitions, 5498 flow [2024-06-14 12:35:51,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5498, PETRI_PLACES=361, PETRI_TRANSITIONS=464} [2024-06-14 12:35:51,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 12:35:51,896 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 464 transitions, 5498 flow [2024-06-14 12:35:51,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:51,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:51,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:51,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:35:51,897 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)] === [2024-06-14 12:35:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1850603724, now seen corresponding path program 12 times [2024-06-14 12:35:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351334439] [2024-06-14 12:35:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:51,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351334439] [2024-06-14 12:35:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351334439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:52,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:52,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757765187] [2024-06-14 12:35:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:52,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:52,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:52,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:52,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 464 transitions, 5498 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:52,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:52,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:52,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:53,950 INFO L124 PetriNetUnfolderBase]: 3275/5116 cut-off events. [2024-06-14 12:35:53,950 INFO L125 PetriNetUnfolderBase]: For 1414128/1414138 co-relation queries the response was YES. [2024-06-14 12:35:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58289 conditions, 5116 events. 3275/5116 cut-off events. For 1414128/1414138 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28887 event pairs, 782 based on Foata normal form. 11/5126 useless extension candidates. Maximal degree in co-relation 58121. Up to 4787 conditions per place. [2024-06-14 12:35:54,028 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-14 12:35:54,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 474 transitions, 6466 flow [2024-06-14 12:35:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:35:54,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:35:54,029 INFO L175 Difference]: Start difference. First operand has 361 places, 464 transitions, 5498 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:35:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 474 transitions, 6466 flow [2024-06-14 12:35:57,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 474 transitions, 6090 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:57,425 INFO L231 Difference]: Finished difference. Result has 362 places, 464 transitions, 5362 flow [2024-06-14 12:35:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5362, PETRI_PLACES=362, PETRI_TRANSITIONS=464} [2024-06-14 12:35:57,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 12:35:57,426 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 464 transitions, 5362 flow [2024-06-14 12:35:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:57,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:57,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:57,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:35:57,426 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)] === [2024-06-14 12:35:57,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1850603538, now seen corresponding path program 12 times [2024-06-14 12:35:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:57,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827878444] [2024-06-14 12:35:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:58,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:58,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827878444] [2024-06-14 12:35:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827878444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:58,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:58,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948349190] [2024-06-14 12:35:58,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:58,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 464 transitions, 5362 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:58,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:58,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:58,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:59,540 INFO L124 PetriNetUnfolderBase]: 3197/5038 cut-off events. [2024-06-14 12:35:59,541 INFO L125 PetriNetUnfolderBase]: For 1437512/1437522 co-relation queries the response was YES. [2024-06-14 12:35:59,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57620 conditions, 5038 events. 3197/5038 cut-off events. For 1437512/1437522 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28854 event pairs, 779 based on Foata normal form. 8/5040 useless extension candidates. Maximal degree in co-relation 57451. Up to 4439 conditions per place. [2024-06-14 12:35:59,615 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 133 changer transitions 0/479 dead transitions. [2024-06-14 12:35:59,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 479 transitions, 6546 flow [2024-06-14 12:35:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:35:59,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:35:59,617 INFO L175 Difference]: Start difference. First operand has 362 places, 464 transitions, 5362 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:35:59,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 479 transitions, 6546 flow [2024-06-14 12:36:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 479 transitions, 6230 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:03,305 INFO L231 Difference]: Finished difference. Result has 363 places, 464 transitions, 5318 flow [2024-06-14 12:36:03,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5318, PETRI_PLACES=363, PETRI_TRANSITIONS=464} [2024-06-14 12:36:03,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:36:03,305 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 464 transitions, 5318 flow [2024-06-14 12:36:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:36:03,306 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)] === [2024-06-14 12:36:03,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1673348886, now seen corresponding path program 4 times [2024-06-14 12:36:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652633727] [2024-06-14 12:36:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652633727] [2024-06-14 12:36:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652633727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:04,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:04,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:04,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220875800] [2024-06-14 12:36:04,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:04,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:04,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 464 transitions, 5318 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:04,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:04,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:04,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:05,622 INFO L124 PetriNetUnfolderBase]: 3205/5038 cut-off events. [2024-06-14 12:36:05,623 INFO L125 PetriNetUnfolderBase]: For 1452142/1452142 co-relation queries the response was YES. [2024-06-14 12:36:05,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57796 conditions, 5038 events. 3205/5038 cut-off events. For 1452142/1452142 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28682 event pairs, 765 based on Foata normal form. 2/5039 useless extension candidates. Maximal degree in co-relation 57626. Up to 4671 conditions per place. [2024-06-14 12:36:05,701 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 388 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-14 12:36:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 477 transitions, 6320 flow [2024-06-14 12:36:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:36:05,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:36:05,703 INFO L175 Difference]: Start difference. First operand has 363 places, 464 transitions, 5318 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:36:05,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 477 transitions, 6320 flow [2024-06-14 12:36:09,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 477 transitions, 6004 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:36:09,616 INFO L231 Difference]: Finished difference. Result has 363 places, 466 transitions, 5207 flow [2024-06-14 12:36:09,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5207, PETRI_PLACES=363, PETRI_TRANSITIONS=466} [2024-06-14 12:36:09,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:36:09,617 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 466 transitions, 5207 flow [2024-06-14 12:36:09,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:09,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:36:09,617 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)] === [2024-06-14 12:36:09,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1673718282, now seen corresponding path program 2 times [2024-06-14 12:36:09,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61894909] [2024-06-14 12:36:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61894909] [2024-06-14 12:36:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61894909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167894003] [2024-06-14 12:36:10,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:10,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:10,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 466 transitions, 5207 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:11,974 INFO L124 PetriNetUnfolderBase]: 3079/4867 cut-off events. [2024-06-14 12:36:11,975 INFO L125 PetriNetUnfolderBase]: For 1475435/1475490 co-relation queries the response was YES. [2024-06-14 12:36:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56278 conditions, 4867 events. 3079/4867 cut-off events. For 1475435/1475490 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28077 event pairs, 749 based on Foata normal form. 19/4855 useless extension candidates. Maximal degree in co-relation 56107. Up to 4401 conditions per place. [2024-06-14 12:36:12,045 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 335 selfloop transitions, 80 changer transitions 0/484 dead transitions. [2024-06-14 12:36:12,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 484 transitions, 6489 flow [2024-06-14 12:36:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:36:12,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:36:12,046 INFO L175 Difference]: Start difference. First operand has 363 places, 466 transitions, 5207 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:36:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 484 transitions, 6489 flow [2024-06-14 12:36:15,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 484 transitions, 6300 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:15,629 INFO L231 Difference]: Finished difference. Result has 366 places, 472 transitions, 5366 flow [2024-06-14 12:36:15,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5018, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5366, PETRI_PLACES=366, PETRI_TRANSITIONS=472} [2024-06-14 12:36:15,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 12:36:15,630 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 472 transitions, 5366 flow [2024-06-14 12:36:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:15,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:36:15,631 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)] === [2024-06-14 12:36:15,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2087025162, now seen corresponding path program 3 times [2024-06-14 12:36:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084140700] [2024-06-14 12:36:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084140700] [2024-06-14 12:36:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084140700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:16,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526012170] [2024-06-14 12:36:16,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:16,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:16,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 472 transitions, 5366 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:16,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:16,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:16,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:17,874 INFO L124 PetriNetUnfolderBase]: 3103/4901 cut-off events. [2024-06-14 12:36:17,874 INFO L125 PetriNetUnfolderBase]: For 1517428/1517483 co-relation queries the response was YES. [2024-06-14 12:36:17,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57384 conditions, 4901 events. 3103/4901 cut-off events. For 1517428/1517483 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28236 event pairs, 750 based on Foata normal form. 19/4889 useless extension candidates. Maximal degree in co-relation 57212. Up to 4424 conditions per place. [2024-06-14 12:36:17,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 325 selfloop transitions, 97 changer transitions 0/491 dead transitions. [2024-06-14 12:36:17,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 491 transitions, 6924 flow [2024-06-14 12:36:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:36:17,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:36:17,956 INFO L175 Difference]: Start difference. First operand has 366 places, 472 transitions, 5366 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:36:17,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 491 transitions, 6924 flow [2024-06-14 12:36:21,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 491 transitions, 6748 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:21,899 INFO L231 Difference]: Finished difference. Result has 370 places, 478 transitions, 5578 flow [2024-06-14 12:36:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5578, PETRI_PLACES=370, PETRI_TRANSITIONS=478} [2024-06-14 12:36:21,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 12:36:21,900 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 478 transitions, 5578 flow [2024-06-14 12:36:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:21,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:36:21,901 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)] === [2024-06-14 12:36:21,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2087500392, now seen corresponding path program 4 times [2024-06-14 12:36:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:21,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159498122] [2024-06-14 12:36:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:22,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:22,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159498122] [2024-06-14 12:36:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159498122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:23,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011698728] [2024-06-14 12:36:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:23,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:23,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 478 transitions, 5578 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:23,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:23,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:23,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:24,381 INFO L124 PetriNetUnfolderBase]: 3089/4892 cut-off events. [2024-06-14 12:36:24,381 INFO L125 PetriNetUnfolderBase]: For 1524827/1524870 co-relation queries the response was YES. [2024-06-14 12:36:24,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57258 conditions, 4892 events. 3089/4892 cut-off events. For 1524827/1524870 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28305 event pairs, 760 based on Foata normal form. 19/4882 useless extension candidates. Maximal degree in co-relation 57084. Up to 4539 conditions per place. [2024-06-14 12:36:24,465 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 21 changer transitions 0/489 dead transitions. [2024-06-14 12:36:24,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 489 transitions, 6448 flow [2024-06-14 12:36:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 12:36:24,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-14 12:36:24,467 INFO L175 Difference]: Start difference. First operand has 370 places, 478 transitions, 5578 flow. Second operand 9 states and 139 transitions. [2024-06-14 12:36:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 489 transitions, 6448 flow [2024-06-14 12:36:28,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 489 transitions, 6139 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:28,210 INFO L231 Difference]: Finished difference. Result has 374 places, 478 transitions, 5317 flow [2024-06-14 12:36:28,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5317, PETRI_PLACES=374, PETRI_TRANSITIONS=478} [2024-06-14 12:36:28,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 12:36:28,211 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 478 transitions, 5317 flow [2024-06-14 12:36:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:28,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:28,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:36:28,211 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)] === [2024-06-14 12:36:28,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2073215592, now seen corresponding path program 5 times [2024-06-14 12:36:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:28,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930620472] [2024-06-14 12:36:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930620472] [2024-06-14 12:36:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930620472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250930001] [2024-06-14 12:36:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:29,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:29,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 478 transitions, 5317 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:29,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:29,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:29,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:30,421 INFO L124 PetriNetUnfolderBase]: 3085/4878 cut-off events. [2024-06-14 12:36:30,422 INFO L125 PetriNetUnfolderBase]: For 1530609/1530652 co-relation queries the response was YES. [2024-06-14 12:36:30,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56819 conditions, 4878 events. 3085/4878 cut-off events. For 1530609/1530652 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28087 event pairs, 748 based on Foata normal form. 19/4867 useless extension candidates. Maximal degree in co-relation 56644. Up to 4410 conditions per place. [2024-06-14 12:36:30,504 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-14 12:36:30,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 489 transitions, 6187 flow [2024-06-14 12:36:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:36:30,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:36:30,505 INFO L175 Difference]: Start difference. First operand has 374 places, 478 transitions, 5317 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:36:30,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 489 transitions, 6187 flow [2024-06-14 12:36:34,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 489 transitions, 6071 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 12:36:34,736 INFO L231 Difference]: Finished difference. Result has 375 places, 478 transitions, 5393 flow [2024-06-14 12:36:34,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5393, PETRI_PLACES=375, PETRI_TRANSITIONS=478} [2024-06-14 12:36:34,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 12:36:34,737 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 478 transitions, 5393 flow [2024-06-14 12:36:34,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:34,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:34,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:36:34,740 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)] === [2024-06-14 12:36:34,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1220411054, now seen corresponding path program 5 times [2024-06-14 12:36:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751134770] [2024-06-14 12:36:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:35,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:35,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751134770] [2024-06-14 12:36:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751134770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:35,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:35,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361828863] [2024-06-14 12:36:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:35,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:35,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:35,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:35,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 478 transitions, 5393 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:35,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:35,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:37,055 INFO L124 PetriNetUnfolderBase]: 3240/5090 cut-off events. [2024-06-14 12:36:37,055 INFO L125 PetriNetUnfolderBase]: For 1549244/1549244 co-relation queries the response was YES. [2024-06-14 12:36:37,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58672 conditions, 5090 events. 3240/5090 cut-off events. For 1549244/1549244 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 29082 event pairs, 744 based on Foata normal form. 2/5091 useless extension candidates. Maximal degree in co-relation 58496. Up to 4732 conditions per place. [2024-06-14 12:36:37,146 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 420 selfloop transitions, 54 changer transitions 0/508 dead transitions. [2024-06-14 12:36:37,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 508 transitions, 6580 flow [2024-06-14 12:36:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:36:37,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:36:37,150 INFO L175 Difference]: Start difference. First operand has 375 places, 478 transitions, 5393 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:36:37,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 508 transitions, 6580 flow [2024-06-14 12:36:40,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 508 transitions, 6330 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:36:40,790 INFO L231 Difference]: Finished difference. Result has 377 places, 488 transitions, 5484 flow [2024-06-14 12:36:40,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5484, PETRI_PLACES=377, PETRI_TRANSITIONS=488} [2024-06-14 12:36:40,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-14 12:36:40,791 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 488 transitions, 5484 flow [2024-06-14 12:36:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:40,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:40,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:36:40,803 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)] === [2024-06-14 12:36:40,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1029575274, now seen corresponding path program 1 times [2024-06-14 12:36:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:40,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205720570] [2024-06-14 12:36:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:41,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205720570] [2024-06-14 12:36:41,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205720570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:41,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:41,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848095227] [2024-06-14 12:36:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:41,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:41,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 488 transitions, 5484 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:41,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:41,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:41,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:43,218 INFO L124 PetriNetUnfolderBase]: 3119/4974 cut-off events. [2024-06-14 12:36:43,218 INFO L125 PetriNetUnfolderBase]: For 1571459/1571459 co-relation queries the response was YES. [2024-06-14 12:36:43,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57960 conditions, 4974 events. 3119/4974 cut-off events. For 1571459/1571459 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29063 event pairs, 692 based on Foata normal form. 2/4963 useless extension candidates. Maximal degree in co-relation 57781. Up to 4552 conditions per place. [2024-06-14 12:36:43,302 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 453 selfloop transitions, 18 changer transitions 0/511 dead transitions. [2024-06-14 12:36:43,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 511 transitions, 6588 flow [2024-06-14 12:36:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:36:43,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:36:43,304 INFO L175 Difference]: Start difference. First operand has 377 places, 488 transitions, 5484 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:36:43,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 511 transitions, 6588 flow [2024-06-14 12:36:48,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 511 transitions, 6390 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:48,168 INFO L231 Difference]: Finished difference. Result has 378 places, 490 transitions, 5425 flow [2024-06-14 12:36:48,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5425, PETRI_PLACES=378, PETRI_TRANSITIONS=490} [2024-06-14 12:36:48,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 12:36:48,169 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 490 transitions, 5425 flow [2024-06-14 12:36:48,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:48,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:48,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:48,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:36:48,169 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)] === [2024-06-14 12:36:48,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1029635724, now seen corresponding path program 2 times [2024-06-14 12:36:48,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:48,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533313552] [2024-06-14 12:36:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:48,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533313552] [2024-06-14 12:36:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533313552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:49,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097049140] [2024-06-14 12:36:49,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:49,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:49,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:49,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 490 transitions, 5425 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:49,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:50,635 INFO L124 PetriNetUnfolderBase]: 3133/4992 cut-off events. [2024-06-14 12:36:50,635 INFO L125 PetriNetUnfolderBase]: For 1612089/1612091 co-relation queries the response was YES. [2024-06-14 12:36:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58591 conditions, 4992 events. 3133/4992 cut-off events. For 1612089/1612091 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29176 event pairs, 724 based on Foata normal form. 2/4975 useless extension candidates. Maximal degree in co-relation 58411. Up to 4581 conditions per place. [2024-06-14 12:36:50,727 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 448 selfloop transitions, 22 changer transitions 0/510 dead transitions. [2024-06-14 12:36:50,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 510 transitions, 6523 flow [2024-06-14 12:36:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:36:50,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:36:50,729 INFO L175 Difference]: Start difference. First operand has 378 places, 490 transitions, 5425 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:36:50,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 510 transitions, 6523 flow [2024-06-14 12:36:54,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 510 transitions, 6400 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:54,473 INFO L231 Difference]: Finished difference. Result has 380 places, 492 transitions, 5454 flow [2024-06-14 12:36:54,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5454, PETRI_PLACES=380, PETRI_TRANSITIONS=492} [2024-06-14 12:36:54,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 12:36:54,473 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 492 transitions, 5454 flow [2024-06-14 12:36:54,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:54,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:54,474 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] [2024-06-14 12:36:54,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:36:54,474 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)] === [2024-06-14 12:36:54,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1940782853, now seen corresponding path program 1 times [2024-06-14 12:36:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689873380] [2024-06-14 12:36:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689873380] [2024-06-14 12:36:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689873380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:36:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68949722] [2024-06-14 12:36:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:36:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:36:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:36:55,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:55,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 492 transitions, 5454 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:55,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:55,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:57,252 INFO L124 PetriNetUnfolderBase]: 3209/5076 cut-off events. [2024-06-14 12:36:57,252 INFO L125 PetriNetUnfolderBase]: For 1635746/1635746 co-relation queries the response was YES. [2024-06-14 12:36:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58887 conditions, 5076 events. 3209/5076 cut-off events. For 1635746/1635746 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29373 event pairs, 751 based on Foata normal form. 4/5067 useless extension candidates. Maximal degree in co-relation 58706. Up to 4788 conditions per place. [2024-06-14 12:36:57,349 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 481 selfloop transitions, 24 changer transitions 0/515 dead transitions. [2024-06-14 12:36:57,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 515 transitions, 6618 flow [2024-06-14 12:36:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:36:57,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:36:57,350 INFO L175 Difference]: Start difference. First operand has 380 places, 492 transitions, 5454 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:36:57,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 515 transitions, 6618 flow [2024-06-14 12:37:01,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 515 transitions, 6484 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:01,552 INFO L231 Difference]: Finished difference. Result has 383 places, 495 transitions, 5462 flow [2024-06-14 12:37:01,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5462, PETRI_PLACES=383, PETRI_TRANSITIONS=495} [2024-06-14 12:37:01,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-14 12:37:01,553 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 495 transitions, 5462 flow [2024-06-14 12:37:01,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:01,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:01,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:01,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:37:01,553 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)] === [2024-06-14 12:37:01,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:01,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1029635848, now seen corresponding path program 1 times [2024-06-14 12:37:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685120967] [2024-06-14 12:37:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:02,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685120967] [2024-06-14 12:37:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685120967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:02,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:02,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:02,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533290892] [2024-06-14 12:37:02,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:02,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:02,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:02,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 495 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:02,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:02,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:02,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:04,031 INFO L124 PetriNetUnfolderBase]: 3206/5070 cut-off events. [2024-06-14 12:37:04,031 INFO L125 PetriNetUnfolderBase]: For 1623778/1623778 co-relation queries the response was YES. [2024-06-14 12:37:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59082 conditions, 5070 events. 3206/5070 cut-off events. For 1623778/1623778 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29317 event pairs, 750 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 58900. Up to 4786 conditions per place. [2024-06-14 12:37:04,120 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 477 selfloop transitions, 26 changer transitions 0/513 dead transitions. [2024-06-14 12:37:04,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 513 transitions, 6532 flow [2024-06-14 12:37:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:37:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:37:04,121 INFO L175 Difference]: Start difference. First operand has 383 places, 495 transitions, 5462 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:37:04,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 513 transitions, 6532 flow [2024-06-14 12:37:08,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 513 transitions, 6376 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:08,232 INFO L231 Difference]: Finished difference. Result has 384 places, 495 transitions, 5368 flow [2024-06-14 12:37:08,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5368, PETRI_PLACES=384, PETRI_TRANSITIONS=495} [2024-06-14 12:37:08,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 12:37:08,233 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 495 transitions, 5368 flow [2024-06-14 12:37:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:08,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:08,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:08,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:37:08,234 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)] === [2024-06-14 12:37:08,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash -32538578, now seen corresponding path program 3 times [2024-06-14 12:37:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422046955] [2024-06-14 12:37:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:08,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:09,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422046955] [2024-06-14 12:37:09,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422046955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:09,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:09,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:09,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467955540] [2024-06-14 12:37:09,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:09,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:09,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:09,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 495 transitions, 5368 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:09,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:10,704 INFO L124 PetriNetUnfolderBase]: 3144/5010 cut-off events. [2024-06-14 12:37:10,705 INFO L125 PetriNetUnfolderBase]: For 1680362/1680366 co-relation queries the response was YES. [2024-06-14 12:37:10,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59366 conditions, 5010 events. 3144/5010 cut-off events. For 1680362/1680366 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29318 event pairs, 718 based on Foata normal form. 2/4989 useless extension candidates. Maximal degree in co-relation 59183. Up to 4593 conditions per place. [2024-06-14 12:37:10,793 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 446 selfloop transitions, 27 changer transitions 0/513 dead transitions. [2024-06-14 12:37:10,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 513 transitions, 6472 flow [2024-06-14 12:37:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:37:10,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:37:10,794 INFO L175 Difference]: Start difference. First operand has 384 places, 495 transitions, 5368 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:37:10,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 513 transitions, 6472 flow [2024-06-14 12:37:14,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 513 transitions, 6386 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:37:14,684 INFO L231 Difference]: Finished difference. Result has 384 places, 497 transitions, 5449 flow [2024-06-14 12:37:14,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5449, PETRI_PLACES=384, PETRI_TRANSITIONS=497} [2024-06-14 12:37:14,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 12:37:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 497 transitions, 5449 flow [2024-06-14 12:37:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:14,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:14,685 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] [2024-06-14 12:37:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:37:14,685 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)] === [2024-06-14 12:37:14,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1510168321, now seen corresponding path program 2 times [2024-06-14 12:37:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99904836] [2024-06-14 12:37:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99904836] [2024-06-14 12:37:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99904836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:15,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058327033] [2024-06-14 12:37:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:16,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:16,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 497 transitions, 5449 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:16,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:16,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:17,323 INFO L124 PetriNetUnfolderBase]: 3293/5200 cut-off events. [2024-06-14 12:37:17,323 INFO L125 PetriNetUnfolderBase]: For 1788832/1788832 co-relation queries the response was YES. [2024-06-14 12:37:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62406 conditions, 5200 events. 3293/5200 cut-off events. For 1788832/1788832 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30047 event pairs, 761 based on Foata normal form. 4/5189 useless extension candidates. Maximal degree in co-relation 62222. Up to 4801 conditions per place. [2024-06-14 12:37:17,415 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 471 selfloop transitions, 48 changer transitions 0/529 dead transitions. [2024-06-14 12:37:17,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 529 transitions, 7415 flow [2024-06-14 12:37:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:37:17,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:37:17,417 INFO L175 Difference]: Start difference. First operand has 384 places, 497 transitions, 5449 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:37:17,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 529 transitions, 7415 flow [2024-06-14 12:37:22,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 529 transitions, 7264 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:22,438 INFO L231 Difference]: Finished difference. Result has 389 places, 508 transitions, 5766 flow [2024-06-14 12:37:22,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5766, PETRI_PLACES=389, PETRI_TRANSITIONS=508} [2024-06-14 12:37:22,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 12:37:22,439 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 508 transitions, 5766 flow [2024-06-14 12:37:22,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:22,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:22,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:22,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:37:22,439 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)] === [2024-06-14 12:37:22,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 325982722, now seen corresponding path program 1 times [2024-06-14 12:37:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:22,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937765571] [2024-06-14 12:37:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937765571] [2024-06-14 12:37:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937765571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:23,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566686137] [2024-06-14 12:37:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:23,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 508 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:23,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:23,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:24,827 INFO L124 PetriNetUnfolderBase]: 3299/5210 cut-off events. [2024-06-14 12:37:24,827 INFO L125 PetriNetUnfolderBase]: For 1816257/1816257 co-relation queries the response was YES. [2024-06-14 12:37:24,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63341 conditions, 5210 events. 3299/5210 cut-off events. For 1816257/1816257 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30140 event pairs, 754 based on Foata normal form. 4/5197 useless extension candidates. Maximal degree in co-relation 63154. Up to 4804 conditions per place. [2024-06-14 12:37:24,917 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 470 selfloop transitions, 52 changer transitions 0/532 dead transitions. [2024-06-14 12:37:24,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 532 transitions, 7530 flow [2024-06-14 12:37:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:37:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:37:24,918 INFO L175 Difference]: Start difference. First operand has 389 places, 508 transitions, 5766 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:37:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 532 transitions, 7530 flow [2024-06-14 12:37:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 532 transitions, 7393 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:29,982 INFO L231 Difference]: Finished difference. Result has 394 places, 511 transitions, 5839 flow [2024-06-14 12:37:29,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5641, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5839, PETRI_PLACES=394, PETRI_TRANSITIONS=511} [2024-06-14 12:37:29,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-14 12:37:29,983 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 511 transitions, 5839 flow [2024-06-14 12:37:29,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:29,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:29,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:29,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:37:29,983 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)] === [2024-06-14 12:37:29,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1147907854, now seen corresponding path program 2 times [2024-06-14 12:37:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321972984] [2024-06-14 12:37:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:29,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321972984] [2024-06-14 12:37:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321972984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188545387] [2024-06-14 12:37:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:31,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:31,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 511 transitions, 5839 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:31,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:31,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:31,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:32,351 INFO L124 PetriNetUnfolderBase]: 3289/5196 cut-off events. [2024-06-14 12:37:32,351 INFO L125 PetriNetUnfolderBase]: For 1805079/1805079 co-relation queries the response was YES. [2024-06-14 12:37:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62584 conditions, 5196 events. 3289/5196 cut-off events. For 1805079/1805079 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30040 event pairs, 750 based on Foata normal form. 4/5185 useless extension candidates. Maximal degree in co-relation 62395. Up to 4801 conditions per place. [2024-06-14 12:37:32,439 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 467 selfloop transitions, 54 changer transitions 0/531 dead transitions. [2024-06-14 12:37:32,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 531 transitions, 7235 flow [2024-06-14 12:37:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:37:32,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:37:32,456 INFO L175 Difference]: Start difference. First operand has 394 places, 511 transitions, 5839 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:37:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 531 transitions, 7235 flow [2024-06-14 12:37:37,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 531 transitions, 7001 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:37,469 INFO L231 Difference]: Finished difference. Result has 397 places, 511 transitions, 5721 flow [2024-06-14 12:37:37,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5721, PETRI_PLACES=397, PETRI_TRANSITIONS=511} [2024-06-14 12:37:37,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 12:37:37,470 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 511 transitions, 5721 flow [2024-06-14 12:37:37,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:37,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:37,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:37:37,471 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)] === [2024-06-14 12:37:37,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:37,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2087209426, now seen corresponding path program 3 times [2024-06-14 12:37:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:37,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815389472] [2024-06-14 12:37:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815389472] [2024-06-14 12:37:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815389472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820242852] [2024-06-14 12:37:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:38,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:38,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 511 transitions, 5721 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:38,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:38,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:38,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:39,906 INFO L124 PetriNetUnfolderBase]: 3337/5270 cut-off events. [2024-06-14 12:37:39,907 INFO L125 PetriNetUnfolderBase]: For 1871605/1871607 co-relation queries the response was YES. [2024-06-14 12:37:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63671 conditions, 5270 events. 3337/5270 cut-off events. For 1871605/1871607 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30656 event pairs, 745 based on Foata normal form. 4/5259 useless extension candidates. Maximal degree in co-relation 63481. Up to 4732 conditions per place. [2024-06-14 12:37:39,997 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 438 selfloop transitions, 94 changer transitions 0/542 dead transitions. [2024-06-14 12:37:39,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 542 transitions, 7791 flow [2024-06-14 12:37:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:37:39,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:37:39,999 INFO L175 Difference]: Start difference. First operand has 397 places, 511 transitions, 5721 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:37:39,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 542 transitions, 7791 flow [2024-06-14 12:37:45,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 542 transitions, 7683 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:45,376 INFO L231 Difference]: Finished difference. Result has 400 places, 522 transitions, 6159 flow [2024-06-14 12:37:45,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6159, PETRI_PLACES=400, PETRI_TRANSITIONS=522} [2024-06-14 12:37:45,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 12:37:45,377 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 522 transitions, 6159 flow [2024-06-14 12:37:45,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:45,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:45,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:45,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:37:45,378 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)] === [2024-06-14 12:37:45,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2078935216, now seen corresponding path program 4 times [2024-06-14 12:37:45,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:45,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006744304] [2024-06-14 12:37:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:45,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006744304] [2024-06-14 12:37:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006744304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:46,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:46,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221183553] [2024-06-14 12:37:46,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:46,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 522 transitions, 6159 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:46,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:46,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:46,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:47,744 INFO L124 PetriNetUnfolderBase]: 3411/5379 cut-off events. [2024-06-14 12:37:47,744 INFO L125 PetriNetUnfolderBase]: For 1969173/1969175 co-relation queries the response was YES. [2024-06-14 12:37:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66848 conditions, 5379 events. 3411/5379 cut-off events. For 1969173/1969175 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31303 event pairs, 753 based on Foata normal form. 4/5370 useless extension candidates. Maximal degree in co-relation 66656. Up to 4789 conditions per place. [2024-06-14 12:37:47,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 450 selfloop transitions, 92 changer transitions 0/552 dead transitions. [2024-06-14 12:37:47,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 552 transitions, 8481 flow [2024-06-14 12:37:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:37:47,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:37:47,835 INFO L175 Difference]: Start difference. First operand has 400 places, 522 transitions, 6159 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:37:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 552 transitions, 8481 flow [2024-06-14 12:37:54,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 552 transitions, 8228 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:54,084 INFO L231 Difference]: Finished difference. Result has 406 places, 530 transitions, 6371 flow [2024-06-14 12:37:54,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6371, PETRI_PLACES=406, PETRI_TRANSITIONS=530} [2024-06-14 12:37:54,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 12:37:54,085 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 530 transitions, 6371 flow [2024-06-14 12:37:54,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:54,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:54,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:54,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:37:54,086 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)] === [2024-06-14 12:37:54,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1850849616, now seen corresponding path program 4 times [2024-06-14 12:37:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357038183] [2024-06-14 12:37:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:55,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:55,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357038183] [2024-06-14 12:37:55,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357038183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:55,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:55,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:55,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221836976] [2024-06-14 12:37:55,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:55,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:55,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 530 transitions, 6371 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:55,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:55,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:55,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:56,658 INFO L124 PetriNetUnfolderBase]: 3330/5275 cut-off events. [2024-06-14 12:37:56,658 INFO L125 PetriNetUnfolderBase]: For 1941926/1941938 co-relation queries the response was YES. [2024-06-14 12:37:56,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65906 conditions, 5275 events. 3330/5275 cut-off events. For 1941926/1941938 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30876 event pairs, 741 based on Foata normal form. 2/5240 useless extension candidates. Maximal degree in co-relation 65711. Up to 4839 conditions per place. [2024-06-14 12:37:56,753 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 471 selfloop transitions, 34 changer transitions 0/545 dead transitions. [2024-06-14 12:37:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 545 transitions, 7533 flow [2024-06-14 12:37:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:37:56,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:37:56,755 INFO L175 Difference]: Start difference. First operand has 406 places, 530 transitions, 6371 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:37:56,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 545 transitions, 7533 flow [2024-06-14 12:38:02,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 545 transitions, 7301 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:02,946 INFO L231 Difference]: Finished difference. Result has 409 places, 532 transitions, 6326 flow [2024-06-14 12:38:02,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6139, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6326, PETRI_PLACES=409, PETRI_TRANSITIONS=532} [2024-06-14 12:38:02,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:38:02,947 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 532 transitions, 6326 flow [2024-06-14 12:38:02,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:02,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:02,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:38:02,947 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)] === [2024-06-14 12:38:02,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1313367498, now seen corresponding path program 5 times [2024-06-14 12:38:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:02,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397095003] [2024-06-14 12:38:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:03,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397095003] [2024-06-14 12:38:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397095003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:03,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956196639] [2024-06-14 12:38:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:03,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:03,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:03,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 532 transitions, 6326 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:03,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:03,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:05,329 INFO L124 PetriNetUnfolderBase]: 3443/5427 cut-off events. [2024-06-14 12:38:05,330 INFO L125 PetriNetUnfolderBase]: For 1995392/1995394 co-relation queries the response was YES. [2024-06-14 12:38:05,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66736 conditions, 5427 events. 3443/5427 cut-off events. For 1995392/1995394 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31596 event pairs, 762 based on Foata normal form. 4/5418 useless extension candidates. Maximal degree in co-relation 66540. Up to 4811 conditions per place. [2024-06-14 12:38:05,423 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 448 selfloop transitions, 104 changer transitions 0/562 dead transitions. [2024-06-14 12:38:05,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 562 transitions, 8669 flow [2024-06-14 12:38:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 12:38:05,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:38:05,424 INFO L175 Difference]: Start difference. First operand has 409 places, 532 transitions, 6326 flow. Second operand 10 states and 172 transitions. [2024-06-14 12:38:05,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 562 transitions, 8669 flow [2024-06-14 12:38:11,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 562 transitions, 8498 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:11,279 INFO L231 Difference]: Finished difference. Result has 415 places, 542 transitions, 6761 flow [2024-06-14 12:38:11,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6761, PETRI_PLACES=415, PETRI_TRANSITIONS=542} [2024-06-14 12:38:11,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 12:38:11,280 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 542 transitions, 6761 flow [2024-06-14 12:38:11,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:11,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:11,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:38:11,281 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)] === [2024-06-14 12:38:11,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2078928706, now seen corresponding path program 6 times [2024-06-14 12:38:11,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354411675] [2024-06-14 12:38:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:12,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354411675] [2024-06-14 12:38:12,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354411675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:12,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506056681] [2024-06-14 12:38:12,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:12,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:12,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:12,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 542 transitions, 6761 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:12,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:12,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:12,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:13,763 INFO L124 PetriNetUnfolderBase]: 3420/5391 cut-off events. [2024-06-14 12:38:13,764 INFO L125 PetriNetUnfolderBase]: For 1985658/1985660 co-relation queries the response was YES. [2024-06-14 12:38:13,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66690 conditions, 5391 events. 3420/5391 cut-off events. For 1985658/1985660 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31366 event pairs, 761 based on Foata normal form. 4/5382 useless extension candidates. Maximal degree in co-relation 66491. Up to 4797 conditions per place. [2024-06-14 12:38:13,860 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 449 selfloop transitions, 103 changer transitions 0/562 dead transitions. [2024-06-14 12:38:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 562 transitions, 8537 flow [2024-06-14 12:38:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:38:13,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:38:13,862 INFO L175 Difference]: Start difference. First operand has 415 places, 542 transitions, 6761 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:38:13,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 562 transitions, 8537 flow [2024-06-14 12:38:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 562 transitions, 8234 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:20,074 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 6698 flow [2024-06-14 12:38:20,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6698, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-14 12:38:20,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 12:38:20,074 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 6698 flow [2024-06-14 12:38:20,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:20,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:20,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:20,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:38:20,075 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)] === [2024-06-14 12:38:20,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1851027556, now seen corresponding path program 7 times [2024-06-14 12:38:20,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:20,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536441450] [2024-06-14 12:38:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536441450] [2024-06-14 12:38:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536441450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:21,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116729408] [2024-06-14 12:38:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:21,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:21,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:21,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:21,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 6698 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:21,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:21,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:21,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:22,670 INFO L124 PetriNetUnfolderBase]: 3426/5401 cut-off events. [2024-06-14 12:38:22,670 INFO L125 PetriNetUnfolderBase]: For 2009051/2009053 co-relation queries the response was YES. [2024-06-14 12:38:22,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66545 conditions, 5401 events. 3426/5401 cut-off events. For 2009051/2009053 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31436 event pairs, 771 based on Foata normal form. 4/5390 useless extension candidates. Maximal degree in co-relation 66346. Up to 4800 conditions per place. [2024-06-14 12:38:22,765 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 458 selfloop transitions, 99 changer transitions 0/567 dead transitions. [2024-06-14 12:38:22,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 567 transitions, 9120 flow [2024-06-14 12:38:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:38:22,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:38:22,766 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 6698 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:38:22,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 567 transitions, 9120 flow [2024-06-14 12:38:28,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 567 transitions, 8921 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:28,434 INFO L231 Difference]: Finished difference. Result has 423 places, 546 transitions, 6797 flow [2024-06-14 12:38:28,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6797, PETRI_PLACES=423, PETRI_TRANSITIONS=546} [2024-06-14 12:38:28,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 12:38:28,435 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 546 transitions, 6797 flow [2024-06-14 12:38:28,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:28,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:28,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:38:28,436 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:28,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1249311888, now seen corresponding path program 8 times [2024-06-14 12:38:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:28,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057507789] [2024-06-14 12:38:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057507789] [2024-06-14 12:38:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057507789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:29,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:29,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53789999] [2024-06-14 12:38:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:29,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:29,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 546 transitions, 6797 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:29,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:29,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:29,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:30,960 INFO L124 PetriNetUnfolderBase]: 3416/5387 cut-off events. [2024-06-14 12:38:30,960 INFO L125 PetriNetUnfolderBase]: For 1999745/1999747 co-relation queries the response was YES. [2024-06-14 12:38:31,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65703 conditions, 5387 events. 3416/5387 cut-off events. For 1999745/1999747 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31352 event pairs, 767 based on Foata normal form. 4/5378 useless extension candidates. Maximal degree in co-relation 65503. Up to 4797 conditions per place. [2024-06-14 12:38:31,356 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 457 selfloop transitions, 99 changer transitions 0/566 dead transitions. [2024-06-14 12:38:31,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 566 transitions, 8847 flow [2024-06-14 12:38:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:38:31,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:38:31,357 INFO L175 Difference]: Start difference. First operand has 423 places, 546 transitions, 6797 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:38:31,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 566 transitions, 8847 flow [2024-06-14 12:38:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 566 transitions, 8377 flow, removed 75 selfloop flow, removed 10 redundant places. [2024-06-14 12:38:37,930 INFO L231 Difference]: Finished difference. Result has 423 places, 546 transitions, 6533 flow [2024-06-14 12:38:37,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6533, PETRI_PLACES=423, PETRI_TRANSITIONS=546} [2024-06-14 12:38:37,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 12:38:37,931 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 546 transitions, 6533 flow [2024-06-14 12:38:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:37,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:37,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:38:37,931 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:37,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1012828698, now seen corresponding path program 1 times [2024-06-14 12:38:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456983381] [2024-06-14 12:38:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:39,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456983381] [2024-06-14 12:38:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456983381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927431526] [2024-06-14 12:38:39,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:39,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:39,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 546 transitions, 6533 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:39,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:39,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:39,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:40,748 INFO L124 PetriNetUnfolderBase]: 3411/5351 cut-off events. [2024-06-14 12:38:40,748 INFO L125 PetriNetUnfolderBase]: For 1960900/1960927 co-relation queries the response was YES. [2024-06-14 12:38:40,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64729 conditions, 5351 events. 3411/5351 cut-off events. For 1960900/1960927 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30885 event pairs, 799 based on Foata normal form. 17/5337 useless extension candidates. Maximal degree in co-relation 64529. Up to 4990 conditions per place. [2024-06-14 12:38:40,847 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 469 selfloop transitions, 23 changer transitions 0/561 dead transitions. [2024-06-14 12:38:40,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 561 transitions, 7645 flow [2024-06-14 12:38:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-14 12:38:40,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35348837209302325 [2024-06-14 12:38:40,848 INFO L175 Difference]: Start difference. First operand has 423 places, 546 transitions, 6533 flow. Second operand 10 states and 152 transitions. [2024-06-14 12:38:40,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 561 transitions, 7645 flow [2024-06-14 12:38:45,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 561 transitions, 7400 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 12:38:45,951 INFO L231 Difference]: Finished difference. Result has 424 places, 548 transitions, 6437 flow [2024-06-14 12:38:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6437, PETRI_PLACES=424, PETRI_TRANSITIONS=548} [2024-06-14 12:38:45,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 12:38:45,952 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 548 transitions, 6437 flow [2024-06-14 12:38:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:45,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:38:45,953 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:45,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1411421788, now seen corresponding path program 1 times [2024-06-14 12:38:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960651259] [2024-06-14 12:38:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:46,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960651259] [2024-06-14 12:38:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960651259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:46,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:46,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676652928] [2024-06-14 12:38:46,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:46,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:46,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:46,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:46,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 548 transitions, 6437 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:46,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:46,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:46,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:48,547 INFO L124 PetriNetUnfolderBase]: 3560/5550 cut-off events. [2024-06-14 12:38:48,547 INFO L125 PetriNetUnfolderBase]: For 1999130/1999140 co-relation queries the response was YES. [2024-06-14 12:38:48,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66600 conditions, 5550 events. 3560/5550 cut-off events. For 1999130/1999140 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31834 event pairs, 746 based on Foata normal form. 6/5543 useless extension candidates. Maximal degree in co-relation 66399. Up to 5159 conditions per place. [2024-06-14 12:38:48,646 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 501 selfloop transitions, 47 changer transitions 0/582 dead transitions. [2024-06-14 12:38:48,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 582 transitions, 7781 flow [2024-06-14 12:38:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:38:48,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:38:48,647 INFO L175 Difference]: Start difference. First operand has 424 places, 548 transitions, 6437 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:38:48,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 582 transitions, 7781 flow [2024-06-14 12:38:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 582 transitions, 7648 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:55,160 INFO L231 Difference]: Finished difference. Result has 426 places, 554 transitions, 6569 flow [2024-06-14 12:38:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6304, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6569, PETRI_PLACES=426, PETRI_TRANSITIONS=554} [2024-06-14 12:38:55,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 12:38:55,161 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 554 transitions, 6569 flow [2024-06-14 12:38:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:55,162 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] [2024-06-14 12:38:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:38:55,162 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:55,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1411541758, now seen corresponding path program 2 times [2024-06-14 12:38:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219682525] [2024-06-14 12:38:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:56,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219682525] [2024-06-14 12:38:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219682525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296917475] [2024-06-14 12:38:56,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:56,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:56,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:56,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 554 transitions, 6569 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:56,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:56,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:56,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:57,875 INFO L124 PetriNetUnfolderBase]: 3578/5575 cut-off events. [2024-06-14 12:38:57,875 INFO L125 PetriNetUnfolderBase]: For 2044590/2044600 co-relation queries the response was YES. [2024-06-14 12:38:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68132 conditions, 5575 events. 3578/5575 cut-off events. For 2044590/2044600 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32013 event pairs, 737 based on Foata normal form. 6/5568 useless extension candidates. Maximal degree in co-relation 67929. Up to 5169 conditions per place. [2024-06-14 12:38:57,986 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 500 selfloop transitions, 53 changer transitions 0/587 dead transitions. [2024-06-14 12:38:57,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 587 transitions, 8339 flow [2024-06-14 12:38:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:38:57,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:38:57,988 INFO L175 Difference]: Start difference. First operand has 426 places, 554 transitions, 6569 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:38:57,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 587 transitions, 8339 flow [2024-06-14 12:39:06,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 587 transitions, 8137 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:06,304 INFO L231 Difference]: Finished difference. Result has 430 places, 560 transitions, 6765 flow [2024-06-14 12:39:06,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6765, PETRI_PLACES=430, PETRI_TRANSITIONS=560} [2024-06-14 12:39:06,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-14 12:39:06,305 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 560 transitions, 6765 flow [2024-06-14 12:39:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:06,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:06,305 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] [2024-06-14 12:39:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:39:06,305 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:06,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 72465834, now seen corresponding path program 1 times [2024-06-14 12:39:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734270148] [2024-06-14 12:39:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:06,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:07,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734270148] [2024-06-14 12:39:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734270148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:07,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694512975] [2024-06-14 12:39:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:07,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:07,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:07,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 560 transitions, 6765 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:07,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:07,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:07,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:09,016 INFO L124 PetriNetUnfolderBase]: 3670/5675 cut-off events. [2024-06-14 12:39:09,017 INFO L125 PetriNetUnfolderBase]: For 2065939/2065943 co-relation queries the response was YES. [2024-06-14 12:39:09,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69125 conditions, 5675 events. 3670/5675 cut-off events. For 2065939/2065943 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32204 event pairs, 775 based on Foata normal form. 5/5679 useless extension candidates. Maximal degree in co-relation 68921. Up to 5438 conditions per place. [2024-06-14 12:39:09,131 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 539 selfloop transitions, 44 changer transitions 0/587 dead transitions. [2024-06-14 12:39:09,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 587 transitions, 8135 flow [2024-06-14 12:39:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:39:09,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:39:09,132 INFO L175 Difference]: Start difference. First operand has 430 places, 560 transitions, 6765 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:39:09,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 587 transitions, 8135 flow [2024-06-14 12:39:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 587 transitions, 7920 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:16,444 INFO L231 Difference]: Finished difference. Result has 434 places, 563 transitions, 6776 flow [2024-06-14 12:39:16,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6550, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6776, PETRI_PLACES=434, PETRI_TRANSITIONS=563} [2024-06-14 12:39:16,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 12:39:16,444 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 563 transitions, 6776 flow [2024-06-14 12:39:16,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,445 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] [2024-06-14 12:39:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:39:16,445 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:16,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1588673278, now seen corresponding path program 3 times [2024-06-14 12:39:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167473406] [2024-06-14 12:39:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167473406] [2024-06-14 12:39:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167473406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:17,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:17,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445258052] [2024-06-14 12:39:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:17,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:17,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 563 transitions, 6776 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:17,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:17,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:17,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:19,224 INFO L124 PetriNetUnfolderBase]: 3593/5596 cut-off events. [2024-06-14 12:39:19,224 INFO L125 PetriNetUnfolderBase]: For 2110505/2110515 co-relation queries the response was YES. [2024-06-14 12:39:19,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69382 conditions, 5596 events. 3593/5596 cut-off events. For 2110505/2110515 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32120 event pairs, 738 based on Foata normal form. 6/5589 useless extension candidates. Maximal degree in co-relation 69176. Up to 5162 conditions per place. [2024-06-14 12:39:19,318 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 492 selfloop transitions, 67 changer transitions 0/594 dead transitions. [2024-06-14 12:39:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 594 transitions, 8432 flow [2024-06-14 12:39:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:39:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 12:39:19,320 INFO L175 Difference]: Start difference. First operand has 434 places, 563 transitions, 6776 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:39:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 594 transitions, 8432 flow [2024-06-14 12:39:26,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 594 transitions, 8228 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:26,487 INFO L231 Difference]: Finished difference. Result has 437 places, 566 transitions, 6866 flow [2024-06-14 12:39:26,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6866, PETRI_PLACES=437, PETRI_TRANSITIONS=566} [2024-06-14 12:39:26,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 12:39:26,487 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 566 transitions, 6866 flow [2024-06-14 12:39:26,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:26,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:26,488 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] [2024-06-14 12:39:26,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:39:26,488 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:26,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1881220688, now seen corresponding path program 2 times [2024-06-14 12:39:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:26,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290334995] [2024-06-14 12:39:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:26,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290334995] [2024-06-14 12:39:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290334995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:27,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:27,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491339066] [2024-06-14 12:39:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:27,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:27,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:27,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 566 transitions, 6866 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:27,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:27,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:27,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:29,277 INFO L124 PetriNetUnfolderBase]: 3698/5714 cut-off events. [2024-06-14 12:39:29,277 INFO L125 PetriNetUnfolderBase]: For 2142240/2142244 co-relation queries the response was YES. [2024-06-14 12:39:29,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70922 conditions, 5714 events. 3698/5714 cut-off events. For 2142240/2142244 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32372 event pairs, 782 based on Foata normal form. 5/5718 useless extension candidates. Maximal degree in co-relation 70715. Up to 5443 conditions per place. [2024-06-14 12:39:29,380 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 61 changer transitions 0/601 dead transitions. [2024-06-14 12:39:29,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 601 transitions, 8729 flow [2024-06-14 12:39:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:39:29,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 12:39:29,382 INFO L175 Difference]: Start difference. First operand has 437 places, 566 transitions, 6866 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:39:29,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 601 transitions, 8729 flow [2024-06-14 12:39:38,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 601 transitions, 8457 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-14 12:39:38,103 INFO L231 Difference]: Finished difference. Result has 440 places, 575 transitions, 7048 flow [2024-06-14 12:39:38,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6594, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7048, PETRI_PLACES=440, PETRI_TRANSITIONS=575} [2024-06-14 12:39:38,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 12:39:38,104 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 575 transitions, 7048 flow [2024-06-14 12:39:38,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:38,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:38,104 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] [2024-06-14 12:39:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:39:38,104 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:38,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:38,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1880983538, now seen corresponding path program 3 times [2024-06-14 12:39:38,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:38,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602469509] [2024-06-14 12:39:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:39,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:39,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602469509] [2024-06-14 12:39:39,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602469509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:39,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:39,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:39,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551016300] [2024-06-14 12:39:39,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:39,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:39,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:39,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:39,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 575 transitions, 7048 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:39,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:39,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:39,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:40,904 INFO L124 PetriNetUnfolderBase]: 3695/5710 cut-off events. [2024-06-14 12:39:40,905 INFO L125 PetriNetUnfolderBase]: For 2162145/2162149 co-relation queries the response was YES. [2024-06-14 12:39:41,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71015 conditions, 5710 events. 3695/5710 cut-off events. For 2162145/2162149 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32396 event pairs, 777 based on Foata normal form. 5/5714 useless extension candidates. Maximal degree in co-relation 70806. Up to 5440 conditions per place. [2024-06-14 12:39:41,038 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 534 selfloop transitions, 62 changer transitions 0/600 dead transitions. [2024-06-14 12:39:41,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 600 transitions, 8320 flow [2024-06-14 12:39:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 12:39:41,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:39:41,040 INFO L175 Difference]: Start difference. First operand has 440 places, 575 transitions, 7048 flow. Second operand 10 states and 160 transitions. [2024-06-14 12:39:41,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 600 transitions, 8320 flow [2024-06-14 12:39:49,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 600 transitions, 8018 flow, removed 126 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:49,195 INFO L231 Difference]: Finished difference. Result has 445 places, 575 transitions, 6876 flow [2024-06-14 12:39:49,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6746, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6876, PETRI_PLACES=445, PETRI_TRANSITIONS=575} [2024-06-14 12:39:49,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-14 12:39:49,195 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 575 transitions, 6876 flow [2024-06-14 12:39:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:49,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:49,196 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] [2024-06-14 12:39:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:39:49,196 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:49,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1516743198, now seen corresponding path program 4 times [2024-06-14 12:39:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:49,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292576273] [2024-06-14 12:39:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:49,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292576273] [2024-06-14 12:39:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292576273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:50,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:50,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012957472] [2024-06-14 12:39:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:50,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:50,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:50,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 575 transitions, 6876 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:50,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:50,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:51,903 INFO L124 PetriNetUnfolderBase]: 3618/5629 cut-off events. [2024-06-14 12:39:51,904 INFO L125 PetriNetUnfolderBase]: For 2206780/2206788 co-relation queries the response was YES. [2024-06-14 12:39:51,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70981 conditions, 5629 events. 3618/5629 cut-off events. For 2206780/2206788 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32318 event pairs, 718 based on Foata normal form. 2/5618 useless extension candidates. Maximal degree in co-relation 70770. Up to 4967 conditions per place. [2024-06-14 12:39:52,009 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 484 selfloop transitions, 88 changer transitions 0/610 dead transitions. [2024-06-14 12:39:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 610 transitions, 8311 flow [2024-06-14 12:39:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:39:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:39:52,010 INFO L175 Difference]: Start difference. First operand has 445 places, 575 transitions, 6876 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:39:52,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 610 transitions, 8311 flow [2024-06-14 12:39:57,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 610 transitions, 8187 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:39:57,581 INFO L231 Difference]: Finished difference. Result has 447 places, 581 transitions, 7122 flow [2024-06-14 12:39:57,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7122, PETRI_PLACES=447, PETRI_TRANSITIONS=581} [2024-06-14 12:39:57,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-14 12:39:57,581 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 581 transitions, 7122 flow [2024-06-14 12:39:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:57,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:57,582 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] [2024-06-14 12:39:57,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:39:57,582 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:57,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash 690600918, now seen corresponding path program 4 times [2024-06-14 12:39:57,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:57,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067193581] [2024-06-14 12:39:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:57,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067193581] [2024-06-14 12:39:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067193581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272802650] [2024-06-14 12:39:58,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:58,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 581 transitions, 7122 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:58,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:58,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:58,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:00,222 INFO L124 PetriNetUnfolderBase]: 3710/5730 cut-off events. [2024-06-14 12:40:00,222 INFO L125 PetriNetUnfolderBase]: For 2228668/2228672 co-relation queries the response was YES. [2024-06-14 12:40:00,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72673 conditions, 5730 events. 3710/5730 cut-off events. For 2228668/2228672 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32495 event pairs, 786 based on Foata normal form. 5/5734 useless extension candidates. Maximal degree in co-relation 72460. Up to 5424 conditions per place. [2024-06-14 12:40:00,337 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 542 selfloop transitions, 61 changer transitions 0/607 dead transitions. [2024-06-14 12:40:00,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 607 transitions, 8549 flow [2024-06-14 12:40:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:40:00,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:40:00,338 INFO L175 Difference]: Start difference. First operand has 447 places, 581 transitions, 7122 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:40:00,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 607 transitions, 8549 flow [2024-06-14 12:40:05,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 607 transitions, 8240 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:05,679 INFO L231 Difference]: Finished difference. Result has 451 places, 584 transitions, 7089 flow [2024-06-14 12:40:05,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7089, PETRI_PLACES=451, PETRI_TRANSITIONS=584} [2024-06-14 12:40:05,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:40:05,680 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 584 transitions, 7089 flow [2024-06-14 12:40:05,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:05,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:05,680 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] [2024-06-14 12:40:05,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:40:05,681 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:05,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1433518914, now seen corresponding path program 5 times [2024-06-14 12:40:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:05,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445394807] [2024-06-14 12:40:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:06,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445394807] [2024-06-14 12:40:06,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445394807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:06,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:06,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:06,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288836036] [2024-06-14 12:40:06,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:06,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:06,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:06,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:06,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:06,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 584 transitions, 7089 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:06,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:06,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:06,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:08,377 INFO L124 PetriNetUnfolderBase]: 3633/5652 cut-off events. [2024-06-14 12:40:08,377 INFO L125 PetriNetUnfolderBase]: For 2276500/2276508 co-relation queries the response was YES. [2024-06-14 12:40:08,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72736 conditions, 5652 events. 3633/5652 cut-off events. For 2276500/2276508 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32470 event pairs, 713 based on Foata normal form. 2/5641 useless extension candidates. Maximal degree in co-relation 72522. Up to 4986 conditions per place. [2024-06-14 12:40:08,657 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 485 selfloop transitions, 94 changer transitions 0/618 dead transitions. [2024-06-14 12:40:08,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 618 transitions, 8546 flow [2024-06-14 12:40:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:40:08,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:40:08,658 INFO L175 Difference]: Start difference. First operand has 451 places, 584 transitions, 7089 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:40:08,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 618 transitions, 8546 flow [2024-06-14 12:40:13,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 618 transitions, 8292 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:13,939 INFO L231 Difference]: Finished difference. Result has 454 places, 590 transitions, 7229 flow [2024-06-14 12:40:13,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6835, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7229, PETRI_PLACES=454, PETRI_TRANSITIONS=590} [2024-06-14 12:40:13,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-14 12:40:13,940 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 590 transitions, 7229 flow [2024-06-14 12:40:13,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:13,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:13,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:13,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:40:13,941 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:13,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 690600732, now seen corresponding path program 6 times [2024-06-14 12:40:13,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136636534] [2024-06-14 12:40:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:14,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:14,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136636534] [2024-06-14 12:40:14,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136636534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:14,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:14,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:14,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850536868] [2024-06-14 12:40:14,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:14,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:15,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:15,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 590 transitions, 7229 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:15,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:15,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:15,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:16,801 INFO L124 PetriNetUnfolderBase]: 3793/5914 cut-off events. [2024-06-14 12:40:16,802 INFO L125 PetriNetUnfolderBase]: For 2334325/2334333 co-relation queries the response was YES. [2024-06-14 12:40:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75995 conditions, 5914 events. 3793/5914 cut-off events. For 2334325/2334333 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34323 event pairs, 774 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 75779. Up to 5110 conditions per place. [2024-06-14 12:40:16,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 503 selfloop transitions, 122 changer transitions 0/664 dead transitions. [2024-06-14 12:40:16,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 664 transitions, 9830 flow [2024-06-14 12:40:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:40:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:40:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:40:16,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-14 12:40:16,913 INFO L175 Difference]: Start difference. First operand has 454 places, 590 transitions, 7229 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:40:16,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 664 transitions, 9830 flow [2024-06-14 12:40:23,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 664 transitions, 9318 flow, removed 166 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:23,761 INFO L231 Difference]: Finished difference. Result has 461 places, 631 transitions, 7899 flow [2024-06-14 12:40:23,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7899, PETRI_PLACES=461, PETRI_TRANSITIONS=631} [2024-06-14 12:40:23,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 12:40:23,761 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 631 transitions, 7899 flow [2024-06-14 12:40:23,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:23,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:23,762 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] [2024-06-14 12:40:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:40:23,762 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:23,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash 696138169, now seen corresponding path program 1 times [2024-06-14 12:40:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625110895] [2024-06-14 12:40:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625110895] [2024-06-14 12:40:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625110895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715786098] [2024-06-14 12:40:24,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:24,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:24,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:24,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 631 transitions, 7899 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:24,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:24,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:24,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:26,710 INFO L124 PetriNetUnfolderBase]: 3790/5903 cut-off events. [2024-06-14 12:40:26,711 INFO L125 PetriNetUnfolderBase]: For 2337762/2337774 co-relation queries the response was YES. [2024-06-14 12:40:26,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76003 conditions, 5903 events. 3790/5903 cut-off events. For 2337762/2337774 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34256 event pairs, 744 based on Foata normal form. 5/5895 useless extension candidates. Maximal degree in co-relation 75784. Up to 5416 conditions per place. [2024-06-14 12:40:26,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 554 selfloop transitions, 61 changer transitions 0/654 dead transitions. [2024-06-14 12:40:26,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 654 transitions, 9218 flow [2024-06-14 12:40:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:40:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:40:26,823 INFO L175 Difference]: Start difference. First operand has 461 places, 631 transitions, 7899 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:40:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 654 transitions, 9218 flow [2024-06-14 12:40:33,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 654 transitions, 8931 flow, removed 122 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:33,677 INFO L231 Difference]: Finished difference. Result has 466 places, 631 transitions, 7746 flow [2024-06-14 12:40:33,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7612, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7746, PETRI_PLACES=466, PETRI_TRANSITIONS=631} [2024-06-14 12:40:33,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 12:40:33,681 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 631 transitions, 7746 flow [2024-06-14 12:40:33,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:33,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:33,682 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] [2024-06-14 12:40:33,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:40:33,682 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:33,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash 560628844, now seen corresponding path program 7 times [2024-06-14 12:40:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:33,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494194997] [2024-06-14 12:40:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:34,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:34,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494194997] [2024-06-14 12:40:34,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494194997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:34,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:34,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:34,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241003645] [2024-06-14 12:40:34,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:34,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:34,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:34,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:34,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 631 transitions, 7746 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:34,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:34,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:34,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:36,677 INFO L124 PetriNetUnfolderBase]: 3800/5915 cut-off events. [2024-06-14 12:40:36,677 INFO L125 PetriNetUnfolderBase]: For 2378799/2378807 co-relation queries the response was YES. [2024-06-14 12:40:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76345 conditions, 5915 events. 3800/5915 cut-off events. For 2378799/2378807 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34234 event pairs, 717 based on Foata normal form. 2/5904 useless extension candidates. Maximal degree in co-relation 76124. Up to 5099 conditions per place. [2024-06-14 12:40:36,781 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 486 selfloop transitions, 135 changer transitions 0/660 dead transitions. [2024-06-14 12:40:36,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 660 transitions, 9279 flow [2024-06-14 12:40:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:40:36,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:40:36,782 INFO L175 Difference]: Start difference. First operand has 466 places, 631 transitions, 7746 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:40:36,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 660 transitions, 9279 flow [2024-06-14 12:40:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 660 transitions, 9137 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:44,425 INFO L231 Difference]: Finished difference. Result has 468 places, 634 transitions, 8062 flow [2024-06-14 12:40:44,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7604, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8062, PETRI_PLACES=468, PETRI_TRANSITIONS=634} [2024-06-14 12:40:44,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 424 predicate places. [2024-06-14 12:40:44,426 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 634 transitions, 8062 flow [2024-06-14 12:40:44,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:44,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:44,427 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] [2024-06-14 12:40:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:40:44,427 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:44,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash 696142044, now seen corresponding path program 1 times [2024-06-14 12:40:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:44,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356328178] [2024-06-14 12:40:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:45,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356328178] [2024-06-14 12:40:45,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356328178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:45,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:45,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:45,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442106252] [2024-06-14 12:40:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:45,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:45,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 634 transitions, 8062 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:45,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:45,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:45,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:47,242 INFO L124 PetriNetUnfolderBase]: 3897/6031 cut-off events. [2024-06-14 12:40:47,242 INFO L125 PetriNetUnfolderBase]: For 2416143/2416149 co-relation queries the response was YES. [2024-06-14 12:40:47,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77946 conditions, 6031 events. 3897/6031 cut-off events. For 2416143/2416149 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34648 event pairs, 776 based on Foata normal form. 6/6036 useless extension candidates. Maximal degree in co-relation 77724. Up to 5677 conditions per place. [2024-06-14 12:40:47,365 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 596 selfloop transitions, 62 changer transitions 0/662 dead transitions. [2024-06-14 12:40:47,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 662 transitions, 9583 flow [2024-06-14 12:40:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:40:47,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:40:47,366 INFO L175 Difference]: Start difference. First operand has 468 places, 634 transitions, 8062 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:40:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 662 transitions, 9583 flow [2024-06-14 12:40:55,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 662 transitions, 9147 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:55,349 INFO L231 Difference]: Finished difference. Result has 470 places, 637 transitions, 7864 flow [2024-06-14 12:40:55,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7864, PETRI_PLACES=470, PETRI_TRANSITIONS=637} [2024-06-14 12:40:55,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-14 12:40:55,350 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 637 transitions, 7864 flow [2024-06-14 12:40:55,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:55,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:55,351 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] [2024-06-14 12:40:55,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:40:55,351 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:55,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 699866911, now seen corresponding path program 1 times [2024-06-14 12:40:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:55,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622183321] [2024-06-14 12:40:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:55,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:56,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:56,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622183321] [2024-06-14 12:40:56,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622183321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:56,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:56,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728311178] [2024-06-14 12:40:56,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:56,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:56,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 637 transitions, 7864 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:56,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:56,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:56,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:58,146 INFO L124 PetriNetUnfolderBase]: 3902/6044 cut-off events. [2024-06-14 12:40:58,147 INFO L125 PetriNetUnfolderBase]: For 2430438/2430446 co-relation queries the response was YES. [2024-06-14 12:40:58,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78037 conditions, 6044 events. 3902/6044 cut-off events. For 2430438/2430446 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 34803 event pairs, 766 based on Foata normal form. 9/6052 useless extension candidates. Maximal degree in co-relation 77814. Up to 5782 conditions per place. [2024-06-14 12:40:58,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 608 selfloop transitions, 48 changer transitions 0/660 dead transitions. [2024-06-14 12:40:58,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 660 transitions, 9345 flow [2024-06-14 12:40:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:40:58,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-14 12:40:58,268 INFO L175 Difference]: Start difference. First operand has 470 places, 637 transitions, 7864 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:40:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 660 transitions, 9345 flow [2024-06-14 12:41:06,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 660 transitions, 9129 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:06,690 INFO L231 Difference]: Finished difference. Result has 472 places, 640 transitions, 7858 flow [2024-06-14 12:41:06,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7858, PETRI_PLACES=472, PETRI_TRANSITIONS=640} [2024-06-14 12:41:06,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-14 12:41:06,690 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 640 transitions, 7858 flow [2024-06-14 12:41:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:06,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:06,691 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] [2024-06-14 12:41:06,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:41:06,691 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:06,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1770075038, now seen corresponding path program 5 times [2024-06-14 12:41:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:06,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789094091] [2024-06-14 12:41:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:06,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:07,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789094091] [2024-06-14 12:41:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789094091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:07,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851995656] [2024-06-14 12:41:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:07,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:07,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:07,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:07,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 640 transitions, 7858 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:07,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:07,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:07,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:09,696 INFO L124 PetriNetUnfolderBase]: 3915/6046 cut-off events. [2024-06-14 12:41:09,696 INFO L125 PetriNetUnfolderBase]: For 2475123/2475127 co-relation queries the response was YES. [2024-06-14 12:41:09,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78886 conditions, 6046 events. 3915/6046 cut-off events. For 2475123/2475127 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34588 event pairs, 769 based on Foata normal form. 5/6050 useless extension candidates. Maximal degree in co-relation 78662. Up to 5660 conditions per place. [2024-06-14 12:41:09,807 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 572 selfloop transitions, 91 changer transitions 0/667 dead transitions. [2024-06-14 12:41:09,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 667 transitions, 9883 flow [2024-06-14 12:41:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:41:09,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:41:09,809 INFO L175 Difference]: Start difference. First operand has 472 places, 640 transitions, 7858 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:41:09,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 667 transitions, 9883 flow [2024-06-14 12:41:17,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 667 transitions, 9695 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:17,062 INFO L231 Difference]: Finished difference. Result has 474 places, 646 transitions, 8180 flow [2024-06-14 12:41:17,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8180, PETRI_PLACES=474, PETRI_TRANSITIONS=646} [2024-06-14 12:41:17,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-14 12:41:17,063 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 646 transitions, 8180 flow [2024-06-14 12:41:17,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:17,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:17,063 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] [2024-06-14 12:41:17,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:41:17,063 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:17,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 699860742, now seen corresponding path program 8 times [2024-06-14 12:41:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:17,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548248461] [2024-06-14 12:41:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:17,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:17,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548248461] [2024-06-14 12:41:17,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548248461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:17,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978863418] [2024-06-14 12:41:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:18,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:18,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 646 transitions, 8180 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:18,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:18,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:19,925 INFO L124 PetriNetUnfolderBase]: 3866/6005 cut-off events. [2024-06-14 12:41:19,926 INFO L125 PetriNetUnfolderBase]: For 2591726/2591736 co-relation queries the response was YES. [2024-06-14 12:41:20,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80928 conditions, 6005 events. 3866/6005 cut-off events. For 2591726/2591736 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34771 event pairs, 718 based on Foata normal form. 2/5989 useless extension candidates. Maximal degree in co-relation 80703. Up to 5085 conditions per place. [2024-06-14 12:41:20,057 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 471 selfloop transitions, 168 changer transitions 0/681 dead transitions. [2024-06-14 12:41:20,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 681 transitions, 10767 flow [2024-06-14 12:41:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:41:20,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:41:20,058 INFO L175 Difference]: Start difference. First operand has 474 places, 646 transitions, 8180 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:41:20,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 681 transitions, 10767 flow [2024-06-14 12:41:29,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 681 transitions, 10478 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-14 12:41:29,454 INFO L231 Difference]: Finished difference. Result has 478 places, 655 transitions, 8797 flow [2024-06-14 12:41:29,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8797, PETRI_PLACES=478, PETRI_TRANSITIONS=655} [2024-06-14 12:41:29,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-14 12:41:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 655 transitions, 8797 flow [2024-06-14 12:41:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:29,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:41:29,455 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:29,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 699861114, now seen corresponding path program 2 times [2024-06-14 12:41:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384730850] [2024-06-14 12:41:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:30,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384730850] [2024-06-14 12:41:30,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384730850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:30,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:30,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712079386] [2024-06-14 12:41:30,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:30,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:30,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 655 transitions, 8797 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:30,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:30,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:32,429 INFO L124 PetriNetUnfolderBase]: 3983/6145 cut-off events. [2024-06-14 12:41:32,429 INFO L125 PetriNetUnfolderBase]: For 2653312/2653318 co-relation queries the response was YES. [2024-06-14 12:41:32,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83267 conditions, 6145 events. 3983/6145 cut-off events. For 2653312/2653318 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35256 event pairs, 787 based on Foata normal form. 6/6150 useless extension candidates. Maximal degree in co-relation 83040. Up to 5744 conditions per place. [2024-06-14 12:41:32,557 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 605 selfloop transitions, 80 changer transitions 0/689 dead transitions. [2024-06-14 12:41:32,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 689 transitions, 11252 flow [2024-06-14 12:41:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:41:32,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:41:32,558 INFO L175 Difference]: Start difference. First operand has 478 places, 655 transitions, 8797 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:41:32,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 689 transitions, 11252 flow [2024-06-14 12:41:41,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 689 transitions, 10876 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:41,551 INFO L231 Difference]: Finished difference. Result has 483 places, 664 transitions, 8935 flow [2024-06-14 12:41:41,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8433, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8935, PETRI_PLACES=483, PETRI_TRANSITIONS=664} [2024-06-14 12:41:41,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-14 12:41:41,552 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 664 transitions, 8935 flow [2024-06-14 12:41:41,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:41,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:41,552 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] [2024-06-14 12:41:41,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:41:41,553 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:41,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1526129130, now seen corresponding path program 3 times [2024-06-14 12:41:41,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:41,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815673279] [2024-06-14 12:41:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:41,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815673279] [2024-06-14 12:41:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815673279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:42,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:42,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135807207] [2024-06-14 12:41:42,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:42,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:42,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:42,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 664 transitions, 8935 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:42,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:42,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:42,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:44,640 INFO L124 PetriNetUnfolderBase]: 3977/6137 cut-off events. [2024-06-14 12:41:44,641 INFO L125 PetriNetUnfolderBase]: For 2638521/2638527 co-relation queries the response was YES. [2024-06-14 12:41:44,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82288 conditions, 6137 events. 3977/6137 cut-off events. For 2638521/2638527 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35235 event pairs, 784 based on Foata normal form. 6/6142 useless extension candidates. Maximal degree in co-relation 82059. Up to 5739 conditions per place. [2024-06-14 12:41:44,762 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 602 selfloop transitions, 82 changer transitions 0/688 dead transitions. [2024-06-14 12:41:44,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 688 transitions, 10728 flow [2024-06-14 12:41:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:41:44,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:41:44,763 INFO L175 Difference]: Start difference. First operand has 483 places, 664 transitions, 8935 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:41:44,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 688 transitions, 10728 flow [2024-06-14 12:41:57,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 688 transitions, 10445 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:57,068 INFO L231 Difference]: Finished difference. Result has 488 places, 664 transitions, 8822 flow [2024-06-14 12:41:57,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8652, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8822, PETRI_PLACES=488, PETRI_TRANSITIONS=664} [2024-06-14 12:41:57,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 444 predicate places. [2024-06-14 12:41:57,069 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 664 transitions, 8822 flow [2024-06-14 12:41:57,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:57,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:57,070 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] [2024-06-14 12:41:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:41:57,070 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:57,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash 699855162, now seen corresponding path program 9 times [2024-06-14 12:41:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:57,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843370777] [2024-06-14 12:41:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843370777] [2024-06-14 12:41:57,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843370777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:57,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:57,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167915511] [2024-06-14 12:41:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:58,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 664 transitions, 8822 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:58,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:58,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:58,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:59,914 INFO L124 PetriNetUnfolderBase]: 3908/6072 cut-off events. [2024-06-14 12:41:59,914 INFO L125 PetriNetUnfolderBase]: For 2704587/2704597 co-relation queries the response was YES. [2024-06-14 12:42:00,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82868 conditions, 6072 events. 3908/6072 cut-off events. For 2704587/2704597 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35279 event pairs, 719 based on Foata normal form. 2/6056 useless extension candidates. Maximal degree in co-relation 82637. Up to 5132 conditions per place. [2024-06-14 12:42:00,036 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 478 selfloop transitions, 173 changer transitions 0/696 dead transitions. [2024-06-14 12:42:00,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 696 transitions, 11217 flow [2024-06-14 12:42:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:42:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:42:00,038 INFO L175 Difference]: Start difference. First operand has 488 places, 664 transitions, 8822 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:42:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 696 transitions, 11217 flow [2024-06-14 12:42:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 696 transitions, 11051 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:11,037 INFO L231 Difference]: Finished difference. Result has 490 places, 670 transitions, 9338 flow [2024-06-14 12:42:11,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8656, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9338, PETRI_PLACES=490, PETRI_TRANSITIONS=670} [2024-06-14 12:42:11,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-14 12:42:11,038 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 670 transitions, 9338 flow [2024-06-14 12:42:11,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:11,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:11,039 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] [2024-06-14 12:42:11,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:42:11,039 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:11,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash 75455392, now seen corresponding path program 6 times [2024-06-14 12:42:11,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:11,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120299391] [2024-06-14 12:42:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:11,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120299391] [2024-06-14 12:42:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120299391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:11,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794663534] [2024-06-14 12:42:11,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:11,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:12,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:12,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 670 transitions, 9338 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:12,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:12,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:12,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:14,013 INFO L124 PetriNetUnfolderBase]: 3992/6155 cut-off events. [2024-06-14 12:42:14,013 INFO L125 PetriNetUnfolderBase]: For 2668259/2668263 co-relation queries the response was YES. [2024-06-14 12:42:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83390 conditions, 6155 events. 3992/6155 cut-off events. For 2668259/2668263 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35221 event pairs, 736 based on Foata normal form. 5/6159 useless extension candidates. Maximal degree in co-relation 83158. Up to 5768 conditions per place. [2024-06-14 12:42:14,126 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 598 selfloop transitions, 88 changer transitions 0/690 dead transitions. [2024-06-14 12:42:14,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 690 transitions, 10777 flow [2024-06-14 12:42:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:42:14,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:42:14,128 INFO L175 Difference]: Start difference. First operand has 490 places, 670 transitions, 9338 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:42:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 690 transitions, 10777 flow [2024-06-14 12:42:22,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 690 transitions, 10282 flow, removed 125 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:22,309 INFO L231 Difference]: Finished difference. Result has 494 places, 670 transitions, 9025 flow [2024-06-14 12:42:22,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9025, PETRI_PLACES=494, PETRI_TRANSITIONS=670} [2024-06-14 12:42:22,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-14 12:42:22,313 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 670 transitions, 9025 flow [2024-06-14 12:42:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:22,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:22,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:22,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:42:22,314 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:22,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1271565216, now seen corresponding path program 7 times [2024-06-14 12:42:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:22,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730513447] [2024-06-14 12:42:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:22,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:23,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730513447] [2024-06-14 12:42:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730513447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:23,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278652544] [2024-06-14 12:42:23,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:23,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:23,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 670 transitions, 9025 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:23,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:23,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:23,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:25,237 INFO L124 PetriNetUnfolderBase]: 4021/6201 cut-off events. [2024-06-14 12:42:25,237 INFO L125 PetriNetUnfolderBase]: For 2745176/2745180 co-relation queries the response was YES. [2024-06-14 12:42:25,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84415 conditions, 6201 events. 4021/6201 cut-off events. For 2745176/2745180 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 35565 event pairs, 796 based on Foata normal form. 5/6205 useless extension candidates. Maximal degree in co-relation 84182. Up to 5666 conditions per place. [2024-06-14 12:42:25,372 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 554 selfloop transitions, 143 changer transitions 0/701 dead transitions. [2024-06-14 12:42:25,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 701 transitions, 12107 flow [2024-06-14 12:42:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:42:25,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:42:25,374 INFO L175 Difference]: Start difference. First operand has 494 places, 670 transitions, 9025 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:42:25,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 701 transitions, 12107 flow [2024-06-14 12:42:34,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 701 transitions, 11886 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:34,338 INFO L231 Difference]: Finished difference. Result has 495 places, 682 transitions, 9758 flow [2024-06-14 12:42:34,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8804, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9758, PETRI_PLACES=495, PETRI_TRANSITIONS=682} [2024-06-14 12:42:34,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-14 12:42:34,339 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 682 transitions, 9758 flow [2024-06-14 12:42:34,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:34,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:34,339 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] [2024-06-14 12:42:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:42:34,339 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:34,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1895964986, now seen corresponding path program 10 times [2024-06-14 12:42:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140435546] [2024-06-14 12:42:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:35,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140435546] [2024-06-14 12:42:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140435546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:35,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:35,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910077268] [2024-06-14 12:42:35,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:35,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:42:35,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 682 transitions, 9758 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:35,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:35,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:42:35,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:37,455 INFO L124 PetriNetUnfolderBase]: 3990/6195 cut-off events. [2024-06-14 12:42:37,455 INFO L125 PetriNetUnfolderBase]: For 2914137/2914147 co-relation queries the response was YES. [2024-06-14 12:42:37,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87686 conditions, 6195 events. 3990/6195 cut-off events. For 2914137/2914147 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35980 event pairs, 772 based on Foata normal form. 2/6179 useless extension candidates. Maximal degree in co-relation 87452. Up to 5057 conditions per place. [2024-06-14 12:42:37,580 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 442 selfloop transitions, 227 changer transitions 0/718 dead transitions. [2024-06-14 12:42:37,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 718 transitions, 12930 flow [2024-06-14 12:42:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:42:37,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:42:37,581 INFO L175 Difference]: Start difference. First operand has 495 places, 682 transitions, 9758 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:42:37,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 718 transitions, 12930 flow [2024-06-14 12:42:48,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 718 transitions, 12600 flow, removed 138 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:48,617 INFO L231 Difference]: Finished difference. Result has 501 places, 694 transitions, 10630 flow [2024-06-14 12:42:48,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9428, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10630, PETRI_PLACES=501, PETRI_TRANSITIONS=694} [2024-06-14 12:42:48,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-14 12:42:48,618 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 694 transitions, 10630 flow [2024-06-14 12:42:48,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:48,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:48,619 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] [2024-06-14 12:42:48,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:42:48,619 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:48,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1576458758, now seen corresponding path program 8 times [2024-06-14 12:42:48,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:48,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461712496] [2024-06-14 12:42:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:48,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461712496] [2024-06-14 12:42:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461712496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:49,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224492235] [2024-06-14 12:42:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:49,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:49,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:49,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:49,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 694 transitions, 10630 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:49,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:49,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:49,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:52,080 INFO L124 PetriNetUnfolderBase]: 4084/6298 cut-off events. [2024-06-14 12:42:52,081 INFO L125 PetriNetUnfolderBase]: For 2922530/2922530 co-relation queries the response was YES. [2024-06-14 12:42:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89131 conditions, 6298 events. 4084/6298 cut-off events. For 2922530/2922530 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36139 event pairs, 773 based on Foata normal form. 1/6298 useless extension candidates. Maximal degree in co-relation 88895. Up to 5990 conditions per place. [2024-06-14 12:42:52,221 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 646 selfloop transitions, 64 changer transitions 0/714 dead transitions. [2024-06-14 12:42:52,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 714 transitions, 12560 flow [2024-06-14 12:42:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:42:52,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 12:42:52,223 INFO L175 Difference]: Start difference. First operand has 501 places, 694 transitions, 10630 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:42:52,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 714 transitions, 12560 flow [2024-06-14 12:43:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 714 transitions, 12192 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-06-14 12:43:03,218 INFO L231 Difference]: Finished difference. Result has 507 places, 697 transitions, 10526 flow [2024-06-14 12:43:03,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10262, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10526, PETRI_PLACES=507, PETRI_TRANSITIONS=697} [2024-06-14 12:43:03,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 463 predicate places. [2024-06-14 12:43:03,219 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 697 transitions, 10526 flow [2024-06-14 12:43:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:03,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:03,219 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] [2024-06-14 12:43:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:43:03,220 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:03,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1895970938, now seen corresponding path program 4 times [2024-06-14 12:43:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794033488] [2024-06-14 12:43:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:03,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794033488] [2024-06-14 12:43:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794033488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015581777] [2024-06-14 12:43:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:04,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 697 transitions, 10526 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:06,494 INFO L124 PetriNetUnfolderBase]: 4126/6356 cut-off events. [2024-06-14 12:43:06,495 INFO L125 PetriNetUnfolderBase]: For 3014914/3014920 co-relation queries the response was YES. [2024-06-14 12:43:06,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90517 conditions, 6356 events. 4126/6356 cut-off events. For 3014914/3014920 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36539 event pairs, 805 based on Foata normal form. 6/6361 useless extension candidates. Maximal degree in co-relation 90279. Up to 5820 conditions per place. [2024-06-14 12:43:06,624 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 606 selfloop transitions, 117 changer transitions 0/727 dead transitions. [2024-06-14 12:43:06,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 727 transitions, 13084 flow [2024-06-14 12:43:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:43:06,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:43:06,625 INFO L175 Difference]: Start difference. First operand has 507 places, 697 transitions, 10526 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:43:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 727 transitions, 13084 flow [2024-06-14 12:43:20,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 727 transitions, 12775 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:20,185 INFO L231 Difference]: Finished difference. Result has 509 places, 706 transitions, 10823 flow [2024-06-14 12:43:20,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10217, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10823, PETRI_PLACES=509, PETRI_TRANSITIONS=706} [2024-06-14 12:43:20,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 465 predicate places. [2024-06-14 12:43:20,186 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 706 transitions, 10823 flow [2024-06-14 12:43:20,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:20,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:20,186 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] [2024-06-14 12:43:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:43:20,187 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:20,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1321430598, now seen corresponding path program 5 times [2024-06-14 12:43:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:20,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077756279] [2024-06-14 12:43:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077756279] [2024-06-14 12:43:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077756279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:21,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:21,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:21,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775731861] [2024-06-14 12:43:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:21,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:21,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:21,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 706 transitions, 10823 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:21,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:21,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:21,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:23,757 INFO L124 PetriNetUnfolderBase]: 4136/6375 cut-off events. [2024-06-14 12:43:23,757 INFO L125 PetriNetUnfolderBase]: For 3055822/3055828 co-relation queries the response was YES. [2024-06-14 12:43:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91335 conditions, 6375 events. 4136/6375 cut-off events. For 3055822/3055828 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36664 event pairs, 787 based on Foata normal form. 6/6380 useless extension candidates. Maximal degree in co-relation 91098. Up to 5830 conditions per place. [2024-06-14 12:43:23,960 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 595 selfloop transitions, 131 changer transitions 0/730 dead transitions. [2024-06-14 12:43:23,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 730 transitions, 13157 flow [2024-06-14 12:43:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:43:23,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:43:23,961 INFO L175 Difference]: Start difference. First operand has 509 places, 706 transitions, 10823 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:43:23,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 730 transitions, 13157 flow [2024-06-14 12:43:38,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 730 transitions, 12870 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-14 12:43:38,159 INFO L231 Difference]: Finished difference. Result has 514 places, 709 transitions, 10930 flow [2024-06-14 12:43:38,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10578, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10930, PETRI_PLACES=514, PETRI_TRANSITIONS=709} [2024-06-14 12:43:38,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 470 predicate places. [2024-06-14 12:43:38,159 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 709 transitions, 10930 flow [2024-06-14 12:43:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:38,160 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] [2024-06-14 12:43:38,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:43:38,160 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:38,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1903208012, now seen corresponding path program 9 times [2024-06-14 12:43:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:38,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208228092] [2024-06-14 12:43:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:38,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:39,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:39,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208228092] [2024-06-14 12:43:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208228092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:39,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:39,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081797266] [2024-06-14 12:43:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:39,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:39,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:39,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 709 transitions, 10930 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:39,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:39,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:39,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:41,802 INFO L124 PetriNetUnfolderBase]: 4146/6381 cut-off events. [2024-06-14 12:43:41,802 INFO L125 PetriNetUnfolderBase]: For 3072406/3072406 co-relation queries the response was YES. [2024-06-14 12:43:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91681 conditions, 6381 events. 4146/6381 cut-off events. For 3072406/3072406 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 36622 event pairs, 785 based on Foata normal form. 1/6381 useless extension candidates. Maximal degree in co-relation 91442. Up to 6086 conditions per place. [2024-06-14 12:43:41,927 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 660 selfloop transitions, 67 changer transitions 0/731 dead transitions. [2024-06-14 12:43:41,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 731 transitions, 12576 flow [2024-06-14 12:43:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:43:41,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 12:43:41,928 INFO L175 Difference]: Start difference. First operand has 514 places, 709 transitions, 10930 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:43:41,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 731 transitions, 12576 flow [2024-06-14 12:43:56,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 731 transitions, 12279 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:56,390 INFO L231 Difference]: Finished difference. Result has 517 places, 715 transitions, 10923 flow [2024-06-14 12:43:56,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10633, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10923, PETRI_PLACES=517, PETRI_TRANSITIONS=715} [2024-06-14 12:43:56,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 473 predicate places. [2024-06-14 12:43:56,391 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 715 transitions, 10923 flow [2024-06-14 12:43:56,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:56,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:56,391 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] [2024-06-14 12:43:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 12:43:56,392 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:56,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1321430381, now seen corresponding path program 2 times [2024-06-14 12:43:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:56,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197187461] [2024-06-14 12:43:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:57,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197187461] [2024-06-14 12:43:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197187461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62085694] [2024-06-14 12:43:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:57,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:57,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:57,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 715 transitions, 10923 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:57,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:57,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:57,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:59,917 INFO L124 PetriNetUnfolderBase]: 4167/6420 cut-off events. [2024-06-14 12:43:59,917 INFO L125 PetriNetUnfolderBase]: For 3138470/3138478 co-relation queries the response was YES. [2024-06-14 12:44:00,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92429 conditions, 6420 events. 4167/6420 cut-off events. For 3138470/3138478 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 37013 event pairs, 798 based on Foata normal form. 9/6428 useless extension candidates. Maximal degree in co-relation 92189. Up to 6087 conditions per place. [2024-06-14 12:44:00,059 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 655 selfloop transitions, 85 changer transitions 0/744 dead transitions. [2024-06-14 12:44:00,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 744 transitions, 13492 flow [2024-06-14 12:44:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:44:00,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:44:00,061 INFO L175 Difference]: Start difference. First operand has 517 places, 715 transitions, 10923 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:44:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 744 transitions, 13492 flow [2024-06-14 12:44:11,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 744 transitions, 13262 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:44:12,003 INFO L231 Difference]: Finished difference. Result has 521 places, 726 transitions, 11267 flow [2024-06-14 12:44:12,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10693, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11267, PETRI_PLACES=521, PETRI_TRANSITIONS=726} [2024-06-14 12:44:12,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 477 predicate places. [2024-06-14 12:44:12,004 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 726 transitions, 11267 flow [2024-06-14 12:44:12,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:12,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:12,004 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] [2024-06-14 12:44:12,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 12:44:12,005 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:12,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1328788200, now seen corresponding path program 11 times [2024-06-14 12:44:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:12,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304096151] [2024-06-14 12:44:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304096151] [2024-06-14 12:44:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304096151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:12,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:12,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37355823] [2024-06-14 12:44:12,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:12,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:12,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:12,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:44:12,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 726 transitions, 11267 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:12,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:12,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:44:12,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:15,321 INFO L124 PetriNetUnfolderBase]: 4066/6307 cut-off events. [2024-06-14 12:44:15,321 INFO L125 PetriNetUnfolderBase]: For 3183347/3183357 co-relation queries the response was YES. [2024-06-14 12:44:15,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92170 conditions, 6307 events. 4066/6307 cut-off events. For 3183347/3183357 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 36706 event pairs, 773 based on Foata normal form. 2/6291 useless extension candidates. Maximal degree in co-relation 91928. Up to 5146 conditions per place. [2024-06-14 12:44:15,535 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 229 changer transitions 0/748 dead transitions. [2024-06-14 12:44:15,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 748 transitions, 13431 flow [2024-06-14 12:44:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:44:15,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:44:15,537 INFO L175 Difference]: Start difference. First operand has 521 places, 726 transitions, 11267 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:44:15,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 748 transitions, 13431 flow Killed by 15