./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:13:05,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:13:05,607 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:13:05,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:13:05,613 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:13:05,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:13:05,638 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:13:05,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:13:05,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:13:05,642 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:13:05,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:13:05,642 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:13:05,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:13:05,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:13:05,644 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:13:05,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:13:05,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:13:05,645 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:13:05,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:13:05,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:13:05,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:13:05,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:13:05,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:13:05,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:13:05,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:13:05,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:13:05,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:13:05,647 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:13:05,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:13:05,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:13:05,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:13:05,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:13:05,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:13:05,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:13:05,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:13:05,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:13:05,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:13:05,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:13:05,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:13:05,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:13:05,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:13:05,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:13:05,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:13:05,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:13:05,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:13:05,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:13:05,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:13:05,891 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:13:05,892 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:13:05,893 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:13:06,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:13:06,073 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:13:06,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:13:07,102 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:13:07,320 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:13:07,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:13:07,333 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1f9840b/f8c2542b2b2a476aaaacdd0b698f98e0/FLAG1faf451a3 [2024-06-03 19:13:07,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1f9840b/f8c2542b2b2a476aaaacdd0b698f98e0 [2024-06-03 19:13:07,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:13:07,347 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:13:07,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:13:07,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:13:07,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:13:07,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:13:06" (1/2) ... [2024-06-03 19:13:07,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d10df4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:13:07, skipping insertion in model container [2024-06-03 19:13:07,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:13:06" (1/2) ... [2024-06-03 19:13:07,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73062fdc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:13:07, skipping insertion in model container [2024-06-03 19:13:07,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:13:07" (2/2) ... [2024-06-03 19:13:07,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d10df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:07, skipping insertion in model container [2024-06-03 19:13:07,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:13:07" (2/2) ... [2024-06-03 19:13:07,359 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:13:07,497 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:13:07,497 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:13:07,498 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:13:07,498 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-03 19:13:07,498 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:13:07,498 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-03 19:13:07,537 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:13:07,844 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:13:07,854 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:13:08,012 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:13:08,044 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:13:08,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08 WrapperNode [2024-06-03 19:13:08,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:13:08,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:13:08,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:13:08,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:13:08,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,095 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-03 19:13:08,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:13:08,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:13:08,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:13:08,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:13:08,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,124 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,145 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]. [2024-06-03 19:13:08,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:13:08,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:13:08,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:13:08,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:13:08,188 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (1/1) ... [2024-06-03 19:13:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:13:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:13:08,218 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) [2024-06-03 19:13:08,225 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 [2024-06-03 19:13:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:13:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:13:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:13:08,248 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:13:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:13:08,249 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:13:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:13:08,249 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:13:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:13:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:13:08,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:13:08,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:13:08,251 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:13:08,389 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:13:08,392 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:13:08,693 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:13:08,693 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:13:08,857 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:13:08,860 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:13:08,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:13:08 BoogieIcfgContainer [2024-06-03 19:13:08,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:13:08,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:13:08,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:13:08,866 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:13:08,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:13:06" (1/4) ... [2024-06-03 19:13:08,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddac4a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:13:08, skipping insertion in model container [2024-06-03 19:13:08,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:13:07" (2/4) ... [2024-06-03 19:13:08,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddac4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:13:08, skipping insertion in model container [2024-06-03 19:13:08,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:13:08" (3/4) ... [2024-06-03 19:13:08,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddac4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:13:08, skipping insertion in model container [2024-06-03 19:13:08,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:13:08" (4/4) ... [2024-06-03 19:13:08,869 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:13:08,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:13:08,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:13:08,883 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:13:08,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:13:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:13:08,982 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-03 19:13:08,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:13:08,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:13:08,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:13:08,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-03 19:13:08,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:13:08,997 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;@102da35f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:13:08,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:13:09,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:13:09,000 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:13:09,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:13:09,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:09,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:13:09,001 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)] === [2024-06-03 19:13:09,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -969480644, now seen corresponding path program 1 times [2024-06-03 19:13:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277095554] [2024-06-03 19:13:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:10,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:10,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277095554] [2024-06-03 19:13:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277095554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:10,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:10,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:13:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043988200] [2024-06-03 19:13:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:10,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:13:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:13:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:13:10,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:10,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) 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) [2024-06-03 19:13:10,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:10,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:10,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:10,501 INFO L124 PetriNetUnfolderBase]: 1659/2576 cut-off events. [2024-06-03 19:13:10,502 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-03 19:13:10,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2576 events. 1659/2576 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12911 event pairs, 1184 based on Foata normal form. 1/2507 useless extension candidates. Maximal degree in co-relation 5127. Up to 2465 conditions per place. [2024-06-03 19:13:10,518 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 19:13:10,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 183 flow [2024-06-03 19:13:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:13:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:13:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-03 19:13:10,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 19:13:10,532 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 78 transitions. [2024-06-03 19:13:10,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 183 flow [2024-06-03 19:13:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:10,539 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-03 19:13:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:13:10,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-03 19:13:10,544 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-03 19:13:10,545 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) [2024-06-03 19:13:10,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:10,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:10,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:13:10,545 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)] === [2024-06-03 19:13:10,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash 337041307, now seen corresponding path program 1 times [2024-06-03 19:13:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:10,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467853521] [2024-06-03 19:13:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:11,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467853521] [2024-06-03 19:13:11,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467853521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:11,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:13:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622772389] [2024-06-03 19:13:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:13:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:13:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:13:11,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:11,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:11,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:11,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:11,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:11,764 INFO L124 PetriNetUnfolderBase]: 1653/2577 cut-off events. [2024-06-03 19:13:11,764 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-03 19:13:11,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2577 events. 1653/2577 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12997 event pairs, 1038 based on Foata normal form. 3/2553 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-03 19:13:11,774 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 19:13:11,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-03 19:13:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:13:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:13:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 19:13:11,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 19:13:11,776 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-03 19:13:11,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-03 19:13:11,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:13:11,778 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-03 19:13:11,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-03 19:13:11,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-03 19:13:11,779 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-03 19:13:11,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:11,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:11,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:11,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:13:11,780 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)] === [2024-06-03 19:13:11,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1858347141, now seen corresponding path program 1 times [2024-06-03 19:13:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:11,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76921053] [2024-06-03 19:13:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:12,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:12,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76921053] [2024-06-03 19:13:12,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76921053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:12,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:12,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:13:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394516724] [2024-06-03 19:13:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:13:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:13:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:13:12,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:12,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:12,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:12,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:12,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:13,160 INFO L124 PetriNetUnfolderBase]: 1661/2603 cut-off events. [2024-06-03 19:13:13,160 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-06-03 19:13:13,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 2603 events. 1661/2603 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13188 event pairs, 812 based on Foata normal form. 5/2584 useless extension candidates. Maximal degree in co-relation 6414. Up to 2387 conditions per place. [2024-06-03 19:13:13,170 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-03 19:13:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 404 flow [2024-06-03 19:13:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:13:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:13:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 19:13:13,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 19:13:13,172 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-03 19:13:13,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 404 flow [2024-06-03 19:13:13,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:13:13,175 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-03 19:13:13,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-03 19:13:13,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-03 19:13:13,176 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-03 19:13:13,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:13,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:13,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:13:13,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:13,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1774187770, now seen corresponding path program 1 times [2024-06-03 19:13:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:13,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012402925] [2024-06-03 19:13:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:14,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012402925] [2024-06-03 19:13:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012402925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:13:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665951702] [2024-06-03 19:13:14,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:13:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:13:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:13:14,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 19:13:14,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:14,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:14,853 INFO L124 PetriNetUnfolderBase]: 1669/2615 cut-off events. [2024-06-03 19:13:14,854 INFO L125 PetriNetUnfolderBase]: For 3180/3183 co-relation queries the response was YES. [2024-06-03 19:13:14,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7550 conditions, 2615 events. 1669/2615 cut-off events. For 3180/3183 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13270 event pairs, 666 based on Foata normal form. 7/2598 useless extension candidates. Maximal degree in co-relation 7530. Up to 2373 conditions per place. [2024-06-03 19:13:14,866 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 62 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-03 19:13:14,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 531 flow [2024-06-03 19:13:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:13:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:13:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 19:13:14,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 19:13:14,870 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 153 transitions. [2024-06-03 19:13:14,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 531 flow [2024-06-03 19:13:14,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 523 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:13:14,875 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 314 flow [2024-06-03 19:13:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-03 19:13:14,876 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-03 19:13:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 314 flow [2024-06-03 19:13:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 19:13:14,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:14,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:13:14,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash -834752700, now seen corresponding path program 1 times [2024-06-03 19:13:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:14,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403158977] [2024-06-03 19:13:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:14,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:16,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:16,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403158977] [2024-06-03 19:13:16,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403158977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:16,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:16,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:13:16,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17450856] [2024-06-03 19:13:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:16,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:13:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:13:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:13:16,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:13:16,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2024-06-03 19:13:16,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:16,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:13:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:16,662 INFO L124 PetriNetUnfolderBase]: 1681/2635 cut-off events. [2024-06-03 19:13:16,662 INFO L125 PetriNetUnfolderBase]: For 5024/5027 co-relation queries the response was YES. [2024-06-03 19:13:16,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8421 conditions, 2635 events. 1681/2635 cut-off events. For 5024/5027 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13372 event pairs, 502 based on Foata normal form. 12/2623 useless extension candidates. Maximal degree in co-relation 8398. Up to 2341 conditions per place. [2024-06-03 19:13:16,676 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 66 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-03 19:13:16,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 632 flow [2024-06-03 19:13:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 19:13:16,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 19:13:16,678 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 314 flow. Second operand 7 states and 172 transitions. [2024-06-03 19:13:16,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 632 flow [2024-06-03 19:13:16,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 583 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:16,685 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-03 19:13:16,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-03 19:13:16,687 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-03 19:13:16,688 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-03 19:13:16,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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) [2024-06-03 19:13:16,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:16,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:13:16,692 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)] === [2024-06-03 19:13:16,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1527270789, now seen corresponding path program 1 times [2024-06-03 19:13:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324882901] [2024-06-03 19:13:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324882901] [2024-06-03 19:13:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324882901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:17,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:13:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104096926] [2024-06-03 19:13:17,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:13:17,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:13:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:13:17,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:17,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:17,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:17,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:17,774 INFO L124 PetriNetUnfolderBase]: 1676/2622 cut-off events. [2024-06-03 19:13:17,774 INFO L125 PetriNetUnfolderBase]: For 6848/6848 co-relation queries the response was YES. [2024-06-03 19:13:17,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 2622 events. 1676/2622 cut-off events. For 6848/6848 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13277 event pairs, 659 based on Foata normal form. 2/2600 useless extension candidates. Maximal degree in co-relation 8917. Up to 2484 conditions per place. [2024-06-03 19:13:17,788 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-03 19:13:17,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 495 flow [2024-06-03 19:13:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:13:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:13:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-03 19:13:17,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-03 19:13:17,789 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 5 states and 102 transitions. [2024-06-03 19:13:17,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 495 flow [2024-06-03 19:13:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 431 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:17,793 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 301 flow [2024-06-03 19:13:17,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-03 19:13:17,794 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-03 19:13:17,794 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 301 flow [2024-06-03 19:13:17,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:17,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:17,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:17,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:13:17,794 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)] === [2024-06-03 19:13:17,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -112774731, now seen corresponding path program 1 times [2024-06-03 19:13:17,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:17,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470208665] [2024-06-03 19:13:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:18,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:18,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470208665] [2024-06-03 19:13:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470208665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:18,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:13:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540129697] [2024-06-03 19:13:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:13:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:13:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:13:18,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:18,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) 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) [2024-06-03 19:13:18,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:18,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:18,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:19,081 INFO L124 PetriNetUnfolderBase]: 1967/3062 cut-off events. [2024-06-03 19:13:19,081 INFO L125 PetriNetUnfolderBase]: For 9000/9000 co-relation queries the response was YES. [2024-06-03 19:13:19,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10287 conditions, 3062 events. 1967/3062 cut-off events. For 9000/9000 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15354 event pairs, 795 based on Foata normal form. 2/3061 useless extension candidates. Maximal degree in co-relation 10261. Up to 2896 conditions per place. [2024-06-03 19:13:19,152 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-03 19:13:19,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 501 flow [2024-06-03 19:13:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:13:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:13:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 19:13:19,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-03 19:13:19,154 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 301 flow. Second operand 6 states and 115 transitions. [2024-06-03 19:13:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 501 flow [2024-06-03 19:13:19,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:19,161 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 335 flow [2024-06-03 19:13:19,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-03 19:13:19,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-03 19:13:19,162 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 335 flow [2024-06-03 19:13:19,162 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) [2024-06-03 19:13:19,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:19,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:19,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:13:19,163 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)] === [2024-06-03 19:13:19,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:19,164 INFO L85 PathProgramCache]: Analyzing trace with hash -584068164, now seen corresponding path program 1 times [2024-06-03 19:13:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:19,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455427455] [2024-06-03 19:13:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:19,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:19,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455427455] [2024-06-03 19:13:19,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455427455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:19,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:19,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:13:19,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559980776] [2024-06-03 19:13:19,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:19,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:13:19,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:13:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:13:20,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:20,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:13:20,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:20,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:20,458 INFO L124 PetriNetUnfolderBase]: 1856/2951 cut-off events. [2024-06-03 19:13:20,458 INFO L125 PetriNetUnfolderBase]: For 11476/11482 co-relation queries the response was YES. [2024-06-03 19:13:20,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2951 events. 1856/2951 cut-off events. For 11476/11482 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15273 event pairs, 727 based on Foata normal form. 8/2955 useless extension candidates. Maximal degree in co-relation 10542. Up to 2663 conditions per place. [2024-06-03 19:13:20,471 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-03 19:13:20,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 589 flow [2024-06-03 19:13:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:13:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:13:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 19:13:20,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-03 19:13:20,476 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-06-03 19:13:20,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 589 flow [2024-06-03 19:13:20,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:20,483 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 375 flow [2024-06-03 19:13:20,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-03 19:13:20,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-03 19:13:20,485 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 375 flow [2024-06-03 19:13:20,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:13:20,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:20,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:13:20,486 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)] === [2024-06-03 19:13:20,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1171629722, now seen corresponding path program 2 times [2024-06-03 19:13:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:20,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986107445] [2024-06-03 19:13:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986107445] [2024-06-03 19:13:21,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986107445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:21,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:21,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:13:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784182321] [2024-06-03 19:13:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:13:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:13:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:13:21,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:21,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:13:21,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:21,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:21,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:21,647 INFO L124 PetriNetUnfolderBase]: 1841/2925 cut-off events. [2024-06-03 19:13:21,647 INFO L125 PetriNetUnfolderBase]: For 13354/13354 co-relation queries the response was YES. [2024-06-03 19:13:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10801 conditions, 2925 events. 1841/2925 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15100 event pairs, 723 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 10774. Up to 2704 conditions per place. [2024-06-03 19:13:21,667 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-03 19:13:21,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 557 flow [2024-06-03 19:13:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:13:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:13:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 19:13:21,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:13:21,668 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 375 flow. Second operand 6 states and 120 transitions. [2024-06-03 19:13:21,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 557 flow [2024-06-03 19:13:21,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:21,676 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 376 flow [2024-06-03 19:13:21,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-03 19:13:21,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-03 19:13:21,676 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 376 flow [2024-06-03 19:13:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-03 19:13:21,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:21,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:21,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:13:21,677 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)] === [2024-06-03 19:13:21,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 798952248, now seen corresponding path program 1 times [2024-06-03 19:13:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460747784] [2024-06-03 19:13:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:22,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460747784] [2024-06-03 19:13:22,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460747784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:22,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:22,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824643701] [2024-06-03 19:13:22,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:22,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:22,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:22,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:22,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:22,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:22,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:23,120 INFO L124 PetriNetUnfolderBase]: 1948/3011 cut-off events. [2024-06-03 19:13:23,120 INFO L125 PetriNetUnfolderBase]: For 15615/15615 co-relation queries the response was YES. [2024-06-03 19:13:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11345 conditions, 3011 events. 1948/3011 cut-off events. For 15615/15615 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14913 event pairs, 753 based on Foata normal form. 4/3012 useless extension candidates. Maximal degree in co-relation 11317. Up to 2848 conditions per place. [2024-06-03 19:13:23,134 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-03 19:13:23,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 614 flow [2024-06-03 19:13:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:13:23,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:13:23,136 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 376 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:13:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 614 flow [2024-06-03 19:13:23,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 567 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:23,143 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-03 19:13:23,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-03 19:13:23,144 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-03 19:13:23,145 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-03 19:13:23,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:23,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:23,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:23,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:13:23,145 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)] === [2024-06-03 19:13:23,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1179660042, now seen corresponding path program 1 times [2024-06-03 19:13:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580739862] [2024-06-03 19:13:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:23,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:24,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580739862] [2024-06-03 19:13:24,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580739862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:24,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:24,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313981209] [2024-06-03 19:13:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:24,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:24,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:24,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:24,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:24,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:24,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:24,654 INFO L124 PetriNetUnfolderBase]: 1970/3078 cut-off events. [2024-06-03 19:13:24,654 INFO L125 PetriNetUnfolderBase]: For 18554/18560 co-relation queries the response was YES. [2024-06-03 19:13:24,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 3078 events. 1970/3078 cut-off events. For 18554/18560 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15550 event pairs, 740 based on Foata normal form. 5/3079 useless extension candidates. Maximal degree in co-relation 12072. Up to 2770 conditions per place. [2024-06-03 19:13:24,668 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-03 19:13:24,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 743 flow [2024-06-03 19:13:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:13:24,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 19:13:24,670 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:13:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 743 flow [2024-06-03 19:13:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 701 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:24,679 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 476 flow [2024-06-03 19:13:24,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-03 19:13:24,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-03 19:13:24,679 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 476 flow [2024-06-03 19:13:24,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:24,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:24,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:24,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:13:24,680 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)] === [2024-06-03 19:13:24,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1960784596, now seen corresponding path program 2 times [2024-06-03 19:13:24,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:24,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654284074] [2024-06-03 19:13:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:24,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:25,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:25,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654284074] [2024-06-03 19:13:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654284074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:25,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:25,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:25,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849366547] [2024-06-03 19:13:25,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:25,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:25,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:25,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:25,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:25,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:26,029 INFO L124 PetriNetUnfolderBase]: 1981/3093 cut-off events. [2024-06-03 19:13:26,029 INFO L125 PetriNetUnfolderBase]: For 22356/22356 co-relation queries the response was YES. [2024-06-03 19:13:26,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 3093 events. 1981/3093 cut-off events. For 22356/22356 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15574 event pairs, 732 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 12936. Up to 2885 conditions per place. [2024-06-03 19:13:26,043 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-06-03 19:13:26,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 828 flow [2024-06-03 19:13:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:13:26,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-03 19:13:26,044 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 476 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:13:26,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 828 flow [2024-06-03 19:13:26,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 790 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:26,056 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 554 flow [2024-06-03 19:13:26,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-03 19:13:26,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-03 19:13:26,057 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 554 flow [2024-06-03 19:13:26,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:26,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:26,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:26,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:13:26,058 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)] === [2024-06-03 19:13:26,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:26,058 INFO L85 PathProgramCache]: Analyzing trace with hash -921594178, now seen corresponding path program 3 times [2024-06-03 19:13:26,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:26,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469595867] [2024-06-03 19:13:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:26,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:26,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469595867] [2024-06-03 19:13:26,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469595867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:26,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:26,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:26,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263397775] [2024-06-03 19:13:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:26,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:26,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:26,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:26,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 554 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:26,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:26,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:26,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:27,476 INFO L124 PetriNetUnfolderBase]: 1976/3086 cut-off events. [2024-06-03 19:13:27,476 INFO L125 PetriNetUnfolderBase]: For 25850/25850 co-relation queries the response was YES. [2024-06-03 19:13:27,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13344 conditions, 3086 events. 1976/3086 cut-off events. For 25850/25850 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15603 event pairs, 732 based on Foata normal form. 2/3085 useless extension candidates. Maximal degree in co-relation 13312. Up to 2898 conditions per place. [2024-06-03 19:13:27,488 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-03 19:13:27,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 790 flow [2024-06-03 19:13:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:13:27,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:13:27,490 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 554 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:13:27,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 790 flow [2024-06-03 19:13:27,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 738 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:27,503 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 538 flow [2024-06-03 19:13:27,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-03 19:13:27,504 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-03 19:13:27,504 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 538 flow [2024-06-03 19:13:27,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:27,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:27,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:27,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:13:27,505 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:27,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2045730303, now seen corresponding path program 1 times [2024-06-03 19:13:27,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:27,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278615296] [2024-06-03 19:13:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:28,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278615296] [2024-06-03 19:13:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278615296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:28,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:13:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929978196] [2024-06-03 19:13:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:13:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:13:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:13:28,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:13:28,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:28,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:28,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:13:28,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:28,615 INFO L124 PetriNetUnfolderBase]: 2486/3721 cut-off events. [2024-06-03 19:13:28,615 INFO L125 PetriNetUnfolderBase]: For 37962/37962 co-relation queries the response was YES. [2024-06-03 19:13:28,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 3721 events. 2486/3721 cut-off events. For 37962/37962 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17869 event pairs, 990 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 16669. Up to 3628 conditions per place. [2024-06-03 19:13:28,633 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 73 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-06-03 19:13:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 760 flow [2024-06-03 19:13:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:13:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:13:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 19:13:28,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-03 19:13:28,634 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 538 flow. Second operand 6 states and 100 transitions. [2024-06-03 19:13:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 760 flow [2024-06-03 19:13:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 722 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:28,653 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 575 flow [2024-06-03 19:13:28,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-03 19:13:28,653 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-03 19:13:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 575 flow [2024-06-03 19:13:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:28,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:28,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:13:28,654 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)] === [2024-06-03 19:13:28,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2081430743, now seen corresponding path program 1 times [2024-06-03 19:13:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442862381] [2024-06-03 19:13:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442862381] [2024-06-03 19:13:29,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442862381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:29,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126386533] [2024-06-03 19:13:29,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:29,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:29,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:29,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:29,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:30,358 INFO L124 PetriNetUnfolderBase]: 1964/3080 cut-off events. [2024-06-03 19:13:30,359 INFO L125 PetriNetUnfolderBase]: For 37665/37668 co-relation queries the response was YES. [2024-06-03 19:13:30,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14673 conditions, 3080 events. 1964/3080 cut-off events. For 37665/37668 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15873 event pairs, 720 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 14637. Up to 2716 conditions per place. [2024-06-03 19:13:30,374 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 27 changer transitions 0/116 dead transitions. [2024-06-03 19:13:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 889 flow [2024-06-03 19:13:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:13:30,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-03 19:13:30,376 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 575 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:13:30,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 889 flow [2024-06-03 19:13:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 857 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:30,391 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 642 flow [2024-06-03 19:13:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-03 19:13:30,391 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-03 19:13:30,392 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 642 flow [2024-06-03 19:13:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:30,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:30,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:13:30,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:30,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260827, now seen corresponding path program 1 times [2024-06-03 19:13:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:30,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735527727] [2024-06-03 19:13:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735527727] [2024-06-03 19:13:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735527727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203065553] [2024-06-03 19:13:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:31,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:31,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 642 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) [2024-06-03 19:13:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:31,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:31,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:32,048 INFO L124 PetriNetUnfolderBase]: 2151/3306 cut-off events. [2024-06-03 19:13:32,049 INFO L125 PetriNetUnfolderBase]: For 44274/44277 co-relation queries the response was YES. [2024-06-03 19:13:32,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 3306 events. 2151/3306 cut-off events. For 44274/44277 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16590 event pairs, 689 based on Foata normal form. 8/3310 useless extension candidates. Maximal degree in co-relation 16391. Up to 2852 conditions per place. [2024-06-03 19:13:32,065 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 85 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-03 19:13:32,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1108 flow [2024-06-03 19:13:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:13:32,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-03 19:13:32,084 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 642 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:13:32,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1108 flow [2024-06-03 19:13:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1035 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:32,128 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 757 flow [2024-06-03 19:13:32,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-03 19:13:32,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-03 19:13:32,129 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 757 flow [2024-06-03 19:13:32,130 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) [2024-06-03 19:13:32,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:32,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:32,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:13:32,144 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)] === [2024-06-03 19:13:32,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2085240178, now seen corresponding path program 1 times [2024-06-03 19:13:32,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:32,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217111038] [2024-06-03 19:13:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217111038] [2024-06-03 19:13:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217111038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:33,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:33,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267525338] [2024-06-03 19:13:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:33,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:33,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:33,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:33,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:33,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:33,648 INFO L124 PetriNetUnfolderBase]: 2162/3322 cut-off events. [2024-06-03 19:13:33,648 INFO L125 PetriNetUnfolderBase]: For 50185/50188 co-relation queries the response was YES. [2024-06-03 19:13:33,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17578 conditions, 3322 events. 2162/3322 cut-off events. For 50185/50188 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16699 event pairs, 720 based on Foata normal form. 2/3320 useless extension candidates. Maximal degree in co-relation 17539. Up to 2993 conditions per place. [2024-06-03 19:13:33,667 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-03 19:13:33,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 1169 flow [2024-06-03 19:13:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 19:13:33,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:33,669 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 757 flow. Second operand 7 states and 147 transitions. [2024-06-03 19:13:33,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 1169 flow [2024-06-03 19:13:33,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1124 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:13:33,693 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 832 flow [2024-06-03 19:13:33,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-03 19:13:33,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-03 19:13:33,693 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 832 flow [2024-06-03 19:13:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:33,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:33,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:13:33,694 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)] === [2024-06-03 19:13:33,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260610, now seen corresponding path program 2 times [2024-06-03 19:13:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:33,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917865634] [2024-06-03 19:13:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917865634] [2024-06-03 19:13:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917865634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:34,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:34,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598520464] [2024-06-03 19:13:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:34,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:34,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:34,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 832 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:34,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:34,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:34,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:35,145 INFO L124 PetriNetUnfolderBase]: 2173/3338 cut-off events. [2024-06-03 19:13:35,146 INFO L125 PetriNetUnfolderBase]: For 55656/55659 co-relation queries the response was YES. [2024-06-03 19:13:35,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 3338 events. 2173/3338 cut-off events. For 55656/55659 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16804 event pairs, 720 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 17960. Up to 3005 conditions per place. [2024-06-03 19:13:35,162 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-03 19:13:35,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 1244 flow [2024-06-03 19:13:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:13:35,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 19:13:35,164 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 832 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:13:35,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 1244 flow [2024-06-03 19:13:35,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1129 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:35,192 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 844 flow [2024-06-03 19:13:35,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-03 19:13:35,192 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 19:13:35,192 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 844 flow [2024-06-03 19:13:35,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:35,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:35,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:35,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:13:35,193 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)] === [2024-06-03 19:13:35,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 654781945, now seen corresponding path program 2 times [2024-06-03 19:13:35,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:35,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041386920] [2024-06-03 19:13:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:35,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:36,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041386920] [2024-06-03 19:13:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041386920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:36,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:36,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332408748] [2024-06-03 19:13:36,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:36,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:36,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:36,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:36,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 844 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) [2024-06-03 19:13:36,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:36,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:36,762 INFO L124 PetriNetUnfolderBase]: 2195/3369 cut-off events. [2024-06-03 19:13:36,763 INFO L125 PetriNetUnfolderBase]: For 61437/61437 co-relation queries the response was YES. [2024-06-03 19:13:36,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18447 conditions, 3369 events. 2195/3369 cut-off events. For 61437/61437 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16909 event pairs, 712 based on Foata normal form. 4/3370 useless extension candidates. Maximal degree in co-relation 18404. Up to 3095 conditions per place. [2024-06-03 19:13:36,786 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 103 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-03 19:13:36,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1322 flow [2024-06-03 19:13:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:13:36,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-03 19:13:36,788 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 844 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:13:36,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1322 flow [2024-06-03 19:13:36,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1253 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:36,818 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 923 flow [2024-06-03 19:13:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-03 19:13:36,819 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-03 19:13:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 923 flow [2024-06-03 19:13:36,819 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) [2024-06-03 19:13:36,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:36,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:13:36,820 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)] === [2024-06-03 19:13:36,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1005992937, now seen corresponding path program 3 times [2024-06-03 19:13:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054825758] [2024-06-03 19:13:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:36,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:37,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:37,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054825758] [2024-06-03 19:13:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054825758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:37,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:37,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677396532] [2024-06-03 19:13:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:37,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:37,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:37,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 923 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) [2024-06-03 19:13:37,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:37,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:37,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:38,247 INFO L124 PetriNetUnfolderBase]: 2217/3406 cut-off events. [2024-06-03 19:13:38,248 INFO L125 PetriNetUnfolderBase]: For 68459/68459 co-relation queries the response was YES. [2024-06-03 19:13:38,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19078 conditions, 3406 events. 2217/3406 cut-off events. For 68459/68459 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17164 event pairs, 712 based on Foata normal form. 4/3407 useless extension candidates. Maximal degree in co-relation 19034. Up to 3183 conditions per place. [2024-06-03 19:13:38,270 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 18 changer transitions 0/136 dead transitions. [2024-06-03 19:13:38,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1289 flow [2024-06-03 19:13:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:13:38,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:13:38,273 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 923 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:13:38,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1289 flow [2024-06-03 19:13:38,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1235 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:38,310 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 965 flow [2024-06-03 19:13:38,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=965, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-03 19:13:38,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-03 19:13:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 965 flow [2024-06-03 19:13:38,311 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) [2024-06-03 19:13:38,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:38,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:13:38,311 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)] === [2024-06-03 19:13:38,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1006259847, now seen corresponding path program 4 times [2024-06-03 19:13:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952401357] [2024-06-03 19:13:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:39,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952401357] [2024-06-03 19:13:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952401357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484897059] [2024-06-03 19:13:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:39,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:39,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 965 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) [2024-06-03 19:13:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:39,865 INFO L124 PetriNetUnfolderBase]: 2207/3392 cut-off events. [2024-06-03 19:13:39,865 INFO L125 PetriNetUnfolderBase]: For 72719/72719 co-relation queries the response was YES. [2024-06-03 19:13:39,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 3392 events. 2207/3392 cut-off events. For 72719/72719 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17078 event pairs, 710 based on Foata normal form. 4/3393 useless extension candidates. Maximal degree in co-relation 19066. Up to 3142 conditions per place. [2024-06-03 19:13:39,886 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 108 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-03 19:13:39,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 137 transitions, 1291 flow [2024-06-03 19:13:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:13:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:13:39,888 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 965 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:13:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 137 transitions, 1291 flow [2024-06-03 19:13:39,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 137 transitions, 1203 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:39,930 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 931 flow [2024-06-03 19:13:39,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-06-03 19:13:39,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-03 19:13:39,930 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 931 flow [2024-06-03 19:13:39,931 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) [2024-06-03 19:13:39,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:39,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:39,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:13:39,931 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)] === [2024-06-03 19:13:39,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1006260064, now seen corresponding path program 3 times [2024-06-03 19:13:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:39,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297912459] [2024-06-03 19:13:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:40,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297912459] [2024-06-03 19:13:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297912459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:40,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:40,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:13:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598412753] [2024-06-03 19:13:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:13:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:40,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:13:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:13:40,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:40,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 931 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:40,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:40,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:40,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:41,211 INFO L124 PetriNetUnfolderBase]: 2202/3386 cut-off events. [2024-06-03 19:13:41,211 INFO L125 PetriNetUnfolderBase]: For 77408/77411 co-relation queries the response was YES. [2024-06-03 19:13:41,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19242 conditions, 3386 events. 2202/3386 cut-off events. For 77408/77411 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17037 event pairs, 714 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 19196. Up to 3171 conditions per place. [2024-06-03 19:13:41,231 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-03 19:13:41,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 131 transitions, 1227 flow [2024-06-03 19:13:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:13:41,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:13:41,232 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 931 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:13:41,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 131 transitions, 1227 flow [2024-06-03 19:13:41,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1128 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:13:41,270 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 874 flow [2024-06-03 19:13:41,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-03 19:13:41,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-03 19:13:41,271 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 874 flow [2024-06-03 19:13:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:13:41,271 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)] === [2024-06-03 19:13:41,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 957716127, now seen corresponding path program 1 times [2024-06-03 19:13:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536045323] [2024-06-03 19:13:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:42,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:42,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536045323] [2024-06-03 19:13:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536045323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:42,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:13:42,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492706805] [2024-06-03 19:13:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:42,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:13:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:13:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:13:42,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:13:42,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:42,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:42,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:13:42,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:42,694 INFO L124 PetriNetUnfolderBase]: 2629/3935 cut-off events. [2024-06-03 19:13:42,695 INFO L125 PetriNetUnfolderBase]: For 94230/94230 co-relation queries the response was YES. [2024-06-03 19:13:42,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 3935 events. 2629/3935 cut-off events. For 94230/94230 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18789 event pairs, 916 based on Foata normal form. 3/3935 useless extension candidates. Maximal degree in co-relation 22065. Up to 3828 conditions per place. [2024-06-03 19:13:42,719 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 102 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2024-06-03 19:13:42,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 1156 flow [2024-06-03 19:13:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:13:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:13:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:13:42,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-03 19:13:42,720 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 874 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:13:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 1156 flow [2024-06-03 19:13:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 1088 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:42,776 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 872 flow [2024-06-03 19:13:42,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-03 19:13:42,776 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-03 19:13:42,777 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 872 flow [2024-06-03 19:13:42,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:42,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:42,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:42,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:13:42,777 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)] === [2024-06-03 19:13:42,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1178918507, now seen corresponding path program 1 times [2024-06-03 19:13:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:42,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167249428] [2024-06-03 19:13:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167249428] [2024-06-03 19:13:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167249428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:43,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047051756] [2024-06-03 19:13:43,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:44,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:44,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:44,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:44,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:44,543 INFO L124 PetriNetUnfolderBase]: 2101/3297 cut-off events. [2024-06-03 19:13:44,543 INFO L125 PetriNetUnfolderBase]: For 89222/89225 co-relation queries the response was YES. [2024-06-03 19:13:44,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3297 events. 2101/3297 cut-off events. For 89222/89225 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17092 event pairs, 488 based on Foata normal form. 6/3299 useless extension candidates. Maximal degree in co-relation 19474. Up to 2812 conditions per place. [2024-06-03 19:13:44,639 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-03 19:13:44,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1384 flow [2024-06-03 19:13:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:13:44,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-03 19:13:44,641 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 872 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:13:44,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1384 flow [2024-06-03 19:13:44,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1340 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:44,690 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 963 flow [2024-06-03 19:13:44,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-03 19:13:44,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-03 19:13:44,690 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 963 flow [2024-06-03 19:13:44,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:44,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:44,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:13:44,691 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)] === [2024-06-03 19:13:44,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash 99845175, now seen corresponding path program 1 times [2024-06-03 19:13:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417183075] [2024-06-03 19:13:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417183075] [2024-06-03 19:13:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417183075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043563902] [2024-06-03 19:13:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:45,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:45,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:45,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 963 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:45,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:45,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:45,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:46,412 INFO L124 PetriNetUnfolderBase]: 2226/3424 cut-off events. [2024-06-03 19:13:46,412 INFO L125 PetriNetUnfolderBase]: For 96343/96346 co-relation queries the response was YES. [2024-06-03 19:13:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3424 events. 2226/3424 cut-off events. For 96343/96346 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17289 event pairs, 662 based on Foata normal form. 2/3422 useless extension candidates. Maximal degree in co-relation 20576. Up to 3008 conditions per place. [2024-06-03 19:13:46,433 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 49 changer transitions 0/164 dead transitions. [2024-06-03 19:13:46,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 164 transitions, 1543 flow [2024-06-03 19:13:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:13:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:13:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 19:13:46,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:13:46,435 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 963 flow. Second operand 10 states and 200 transitions. [2024-06-03 19:13:46,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 164 transitions, 1543 flow [2024-06-03 19:13:46,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 164 transitions, 1478 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:46,483 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 1083 flow [2024-06-03 19:13:46,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1083, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-06-03 19:13:46,483 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-03 19:13:46,483 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 1083 flow [2024-06-03 19:13:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:46,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:46,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:46,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:13:46,484 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)] === [2024-06-03 19:13:46,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1178858057, now seen corresponding path program 2 times [2024-06-03 19:13:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:46,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993816865] [2024-06-03 19:13:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:46,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993816865] [2024-06-03 19:13:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993816865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165791952] [2024-06-03 19:13:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:47,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:47,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 1083 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:47,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:47,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:47,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:48,115 INFO L124 PetriNetUnfolderBase]: 2148/3366 cut-off events. [2024-06-03 19:13:48,115 INFO L125 PetriNetUnfolderBase]: For 105944/105947 co-relation queries the response was YES. [2024-06-03 19:13:48,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21015 conditions, 3366 events. 2148/3366 cut-off events. For 105944/105947 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17442 event pairs, 623 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 20965. Up to 2944 conditions per place. [2024-06-03 19:13:48,139 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 115 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-06-03 19:13:48,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1499 flow [2024-06-03 19:13:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:13:48,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-03 19:13:48,141 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 1083 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:13:48,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1499 flow [2024-06-03 19:13:48,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1406 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:48,202 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1109 flow [2024-06-03 19:13:48,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-03 19:13:48,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-03 19:13:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1109 flow [2024-06-03 19:13:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:48,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:13:48,204 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)] === [2024-06-03 19:13:48,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 102641561, now seen corresponding path program 3 times [2024-06-03 19:13:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097135133] [2024-06-03 19:13:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097135133] [2024-06-03 19:13:49,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097135133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:49,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:49,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140396592] [2024-06-03 19:13:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:49,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:49,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:49,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:13:49,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1109 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:49,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:49,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:13:49,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:49,949 INFO L124 PetriNetUnfolderBase]: 2141/3353 cut-off events. [2024-06-03 19:13:49,949 INFO L125 PetriNetUnfolderBase]: For 112528/112531 co-relation queries the response was YES. [2024-06-03 19:13:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21212 conditions, 3353 events. 2141/3353 cut-off events. For 112528/112531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17367 event pairs, 622 based on Foata normal form. 6/3355 useless extension candidates. Maximal degree in co-relation 21160. Up to 2966 conditions per place. [2024-06-03 19:13:49,975 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-03 19:13:49,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 157 transitions, 1459 flow [2024-06-03 19:13:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:13:49,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-03 19:13:49,976 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1109 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:13:49,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 157 transitions, 1459 flow [2024-06-03 19:13:50,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1381 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:50,032 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1088 flow [2024-06-03 19:13:50,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1088, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-03 19:13:50,032 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-03 19:13:50,033 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1088 flow [2024-06-03 19:13:50,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:50,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:50,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:50,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:13:50,033 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:50,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2145408719, now seen corresponding path program 2 times [2024-06-03 19:13:50,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:50,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313477080] [2024-06-03 19:13:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:50,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313477080] [2024-06-03 19:13:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313477080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:50,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595839323] [2024-06-03 19:13:50,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:50,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:50,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:50,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:51,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1088 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:51,705 INFO L124 PetriNetUnfolderBase]: 2257/3469 cut-off events. [2024-06-03 19:13:51,705 INFO L125 PetriNetUnfolderBase]: For 119302/119305 co-relation queries the response was YES. [2024-06-03 19:13:51,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3469 events. 2257/3469 cut-off events. For 119302/119305 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17538 event pairs, 660 based on Foata normal form. 2/3467 useless extension candidates. Maximal degree in co-relation 21962. Up to 3079 conditions per place. [2024-06-03 19:13:51,730 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 49 changer transitions 0/167 dead transitions. [2024-06-03 19:13:51,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1638 flow [2024-06-03 19:13:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:13:51,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-03 19:13:51,731 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1088 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:13:51,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1638 flow [2024-06-03 19:13:51,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1560 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:13:51,794 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1150 flow [2024-06-03 19:13:51,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1150, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-03 19:13:51,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-03 19:13:51,796 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1150 flow [2024-06-03 19:13:51,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:51,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:51,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:13:51,796 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)] === [2024-06-03 19:13:51,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1060585927, now seen corresponding path program 1 times [2024-06-03 19:13:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:51,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032960296] [2024-06-03 19:13:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032960296] [2024-06-03 19:13:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032960296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:52,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621462211] [2024-06-03 19:13:52,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:52,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:52,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1150 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:52,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:53,405 INFO L124 PetriNetUnfolderBase]: 2311/3552 cut-off events. [2024-06-03 19:13:53,406 INFO L125 PetriNetUnfolderBase]: For 130230/130233 co-relation queries the response was YES. [2024-06-03 19:13:53,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3552 events. 2311/3552 cut-off events. For 130230/130233 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17967 event pairs, 634 based on Foata normal form. 4/3552 useless extension candidates. Maximal degree in co-relation 22819. Up to 3006 conditions per place. [2024-06-03 19:13:53,429 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 111 selfloop transitions, 55 changer transitions 0/172 dead transitions. [2024-06-03 19:13:53,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1864 flow [2024-06-03 19:13:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:13:53,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:13:53,431 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1150 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:13:53,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1864 flow [2024-06-03 19:13:53,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:53,504 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1231 flow [2024-06-03 19:13:53,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-03 19:13:53,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-03 19:13:53,505 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1231 flow [2024-06-03 19:13:53,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:53,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:53,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:13:53,506 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)] === [2024-06-03 19:13:53,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash 218110671, now seen corresponding path program 2 times [2024-06-03 19:13:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736696070] [2024-06-03 19:13:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736696070] [2024-06-03 19:13:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736696070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:54,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:54,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:54,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638583423] [2024-06-03 19:13:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:54,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:54,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:54,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:54,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:54,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:54,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:54,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:54,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:55,217 INFO L124 PetriNetUnfolderBase]: 2333/3589 cut-off events. [2024-06-03 19:13:55,217 INFO L125 PetriNetUnfolderBase]: For 139410/139413 co-relation queries the response was YES. [2024-06-03 19:13:55,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23426 conditions, 3589 events. 2333/3589 cut-off events. For 139410/139413 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18260 event pairs, 634 based on Foata normal form. 4/3589 useless extension candidates. Maximal degree in co-relation 23371. Up to 3025 conditions per place. [2024-06-03 19:13:55,240 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-03 19:13:55,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1931 flow [2024-06-03 19:13:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 19:13:55,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-03 19:13:55,242 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1231 flow. Second operand 8 states and 170 transitions. [2024-06-03 19:13:55,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1931 flow [2024-06-03 19:13:55,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1817 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 19:13:55,333 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1285 flow [2024-06-03 19:13:55,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1285, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-03 19:13:55,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-03 19:13:55,333 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1285 flow [2024-06-03 19:13:55,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:55,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:55,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:13:55,334 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)] === [2024-06-03 19:13:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash 217937505, now seen corresponding path program 3 times [2024-06-03 19:13:55,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:55,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775027827] [2024-06-03 19:13:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:56,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775027827] [2024-06-03 19:13:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775027827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:56,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:56,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:56,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325427337] [2024-06-03 19:13:56,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:56,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:56,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:56,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:56,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:56,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1285 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:56,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:56,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:56,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:56,968 INFO L124 PetriNetUnfolderBase]: 2344/3605 cut-off events. [2024-06-03 19:13:56,969 INFO L125 PetriNetUnfolderBase]: For 147618/147621 co-relation queries the response was YES. [2024-06-03 19:13:56,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3605 events. 2344/3605 cut-off events. For 147618/147621 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18335 event pairs, 667 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 23689. Up to 3250 conditions per place. [2024-06-03 19:13:56,993 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 125 selfloop transitions, 43 changer transitions 0/174 dead transitions. [2024-06-03 19:13:56,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1731 flow [2024-06-03 19:13:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 19:13:56,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-03 19:13:56,994 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1285 flow. Second operand 8 states and 162 transitions. [2024-06-03 19:13:56,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1731 flow [2024-06-03 19:13:57,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1621 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:57,081 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1309 flow [2024-06-03 19:13:57,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-03 19:13:57,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-03 19:13:57,082 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1309 flow [2024-06-03 19:13:57,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:57,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:57,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:57,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:13:57,083 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)] === [2024-06-03 19:13:57,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1060765417, now seen corresponding path program 3 times [2024-06-03 19:13:57,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:57,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694996594] [2024-06-03 19:13:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:57,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694996594] [2024-06-03 19:13:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694996594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:57,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371214901] [2024-06-03 19:13:57,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:57,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:58,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:58,686 INFO L124 PetriNetUnfolderBase]: 2334/3591 cut-off events. [2024-06-03 19:13:58,687 INFO L125 PetriNetUnfolderBase]: For 155345/155348 co-relation queries the response was YES. [2024-06-03 19:13:58,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23763 conditions, 3591 events. 2334/3591 cut-off events. For 155345/155348 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18265 event pairs, 625 based on Foata normal form. 4/3591 useless extension candidates. Maximal degree in co-relation 23706. Up to 3033 conditions per place. [2024-06-03 19:13:58,712 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 111 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2024-06-03 19:13:58,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 1867 flow [2024-06-03 19:13:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:13:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:13:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 19:13:58,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-03 19:13:58,714 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1309 flow. Second operand 8 states and 170 transitions. [2024-06-03 19:13:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 1867 flow [2024-06-03 19:13:58,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1747 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:58,816 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1321 flow [2024-06-03 19:13:58,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-03 19:13:58,816 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-03 19:13:58,816 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1321 flow [2024-06-03 19:13:58,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:58,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:58,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:13:58,817 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:58,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 218110485, now seen corresponding path program 4 times [2024-06-03 19:13:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339664060] [2024-06-03 19:13:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:59,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339664060] [2024-06-03 19:13:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339664060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:59,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:59,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:13:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881182309] [2024-06-03 19:13:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:59,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:13:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:13:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:13:59,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:13:59,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:59,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:59,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:13:59,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:00,479 INFO L124 PetriNetUnfolderBase]: 2345/3607 cut-off events. [2024-06-03 19:14:00,479 INFO L125 PetriNetUnfolderBase]: For 163953/163956 co-relation queries the response was YES. [2024-06-03 19:14:00,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 3607 events. 2345/3607 cut-off events. For 163953/163956 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18365 event pairs, 665 based on Foata normal form. 2/3605 useless extension candidates. Maximal degree in co-relation 24197. Up to 3252 conditions per place. [2024-06-03 19:14:00,504 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 128 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-03 19:14:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 1763 flow [2024-06-03 19:14:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:14:00,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:14:00,505 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1321 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:14:00,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 1763 flow [2024-06-03 19:14:00,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1585 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:00,594 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1277 flow [2024-06-03 19:14:00,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-03 19:14:00,595 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-03 19:14:00,595 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1277 flow [2024-06-03 19:14:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:00,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:00,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:14:00,595 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)] === [2024-06-03 19:14:00,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash -388918226, now seen corresponding path program 1 times [2024-06-03 19:14:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545103822] [2024-06-03 19:14:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:01,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545103822] [2024-06-03 19:14:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545103822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:01,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:01,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:14:01,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631674104] [2024-06-03 19:14:01,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:14:01,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:14:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:14:01,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:01,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1277 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:01,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:01,973 INFO L124 PetriNetUnfolderBase]: 2836/4241 cut-off events. [2024-06-03 19:14:01,973 INFO L125 PetriNetUnfolderBase]: For 196747/196747 co-relation queries the response was YES. [2024-06-03 19:14:01,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28113 conditions, 4241 events. 2836/4241 cut-off events. For 196747/196747 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20500 event pairs, 867 based on Foata normal form. 1/4239 useless extension candidates. Maximal degree in co-relation 28054. Up to 4094 conditions per place. [2024-06-03 19:14:02,005 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 137 selfloop transitions, 18 changer transitions 0/171 dead transitions. [2024-06-03 19:14:02,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 171 transitions, 1778 flow [2024-06-03 19:14:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:14:02,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-03 19:14:02,007 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1277 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:14:02,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 171 transitions, 1778 flow [2024-06-03 19:14:02,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 1672 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:14:02,147 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1324 flow [2024-06-03 19:14:02,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-03 19:14:02,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-03 19:14:02,147 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1324 flow [2024-06-03 19:14:02,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:02,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:02,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:02,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:14:02,148 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:02,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1129289485, now seen corresponding path program 5 times [2024-06-03 19:14:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:02,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466929087] [2024-06-03 19:14:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:02,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:03,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466929087] [2024-06-03 19:14:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466929087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:03,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:03,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:03,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778911073] [2024-06-03 19:14:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:03,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:03,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:03,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:03,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:03,814 INFO L124 PetriNetUnfolderBase]: 2380/3653 cut-off events. [2024-06-03 19:14:03,815 INFO L125 PetriNetUnfolderBase]: For 182905/182908 co-relation queries the response was YES. [2024-06-03 19:14:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25139 conditions, 3653 events. 2380/3653 cut-off events. For 182905/182908 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18406 event pairs, 661 based on Foata normal form. 4/3653 useless extension candidates. Maximal degree in co-relation 25078. Up to 3413 conditions per place. [2024-06-03 19:14:03,839 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 20 changer transitions 0/180 dead transitions. [2024-06-03 19:14:03,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1724 flow [2024-06-03 19:14:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:14:03,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:14:03,841 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1324 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:14:03,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1724 flow [2024-06-03 19:14:03,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 1669 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:03,930 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1317 flow [2024-06-03 19:14:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-03 19:14:03,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-03 19:14:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1317 flow [2024-06-03 19:14:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:03,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:03,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:14:03,932 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -948693639, now seen corresponding path program 4 times [2024-06-03 19:14:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152639514] [2024-06-03 19:14:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:04,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152639514] [2024-06-03 19:14:04,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152639514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:04,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:04,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:04,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637753663] [2024-06-03 19:14:04,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:04,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:04,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:04,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:04,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:04,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:04,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:05,576 INFO L124 PetriNetUnfolderBase]: 2434/3736 cut-off events. [2024-06-03 19:14:05,576 INFO L125 PetriNetUnfolderBase]: For 197083/197086 co-relation queries the response was YES. [2024-06-03 19:14:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 3736 events. 2434/3736 cut-off events. For 197083/197086 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18941 event pairs, 663 based on Foata normal form. 6/3738 useless extension candidates. Maximal degree in co-relation 25916. Up to 3379 conditions per place. [2024-06-03 19:14:05,603 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 153 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-03 19:14:05,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 193 transitions, 2109 flow [2024-06-03 19:14:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:14:05,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-03 19:14:05,604 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1317 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:14:05,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 193 transitions, 2109 flow [2024-06-03 19:14:05,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 193 transitions, 2038 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:05,722 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1396 flow [2024-06-03 19:14:05,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-03 19:14:05,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-03 19:14:05,723 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1396 flow [2024-06-03 19:14:05,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:05,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:05,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:14:05,724 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)] === [2024-06-03 19:14:05,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash -940419429, now seen corresponding path program 5 times [2024-06-03 19:14:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:05,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530144123] [2024-06-03 19:14:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:05,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:06,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:06,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530144123] [2024-06-03 19:14:06,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530144123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:06,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:06,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:06,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358799010] [2024-06-03 19:14:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:06,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:06,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:06,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:06,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:06,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:06,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1396 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:06,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:07,287 INFO L124 PetriNetUnfolderBase]: 2424/3722 cut-off events. [2024-06-03 19:14:07,287 INFO L125 PetriNetUnfolderBase]: For 205479/205482 co-relation queries the response was YES. [2024-06-03 19:14:07,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26123 conditions, 3722 events. 2424/3722 cut-off events. For 205479/205482 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18842 event pairs, 661 based on Foata normal form. 6/3724 useless extension candidates. Maximal degree in co-relation 26059. Up to 3454 conditions per place. [2024-06-03 19:14:07,313 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 160 selfloop transitions, 20 changer transitions 0/188 dead transitions. [2024-06-03 19:14:07,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 188 transitions, 1820 flow [2024-06-03 19:14:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:14:07,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:14:07,315 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1396 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:14:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 188 transitions, 1820 flow [2024-06-03 19:14:07,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 1697 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:07,424 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1321 flow [2024-06-03 19:14:07,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-03 19:14:07,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-03 19:14:07,425 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1321 flow [2024-06-03 19:14:07,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:07,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:07,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:07,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:14:07,425 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)] === [2024-06-03 19:14:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 546809225, now seen corresponding path program 6 times [2024-06-03 19:14:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:07,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743281800] [2024-06-03 19:14:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:07,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:08,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743281800] [2024-06-03 19:14:08,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743281800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:08,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:08,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628809355] [2024-06-03 19:14:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:08,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:08,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:08,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:08,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:08,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:08,973 INFO L124 PetriNetUnfolderBase]: 2414/3708 cut-off events. [2024-06-03 19:14:08,973 INFO L125 PetriNetUnfolderBase]: For 212858/212861 co-relation queries the response was YES. [2024-06-03 19:14:08,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3708 events. 2414/3708 cut-off events. For 212858/212861 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18777 event pairs, 654 based on Foata normal form. 6/3710 useless extension candidates. Maximal degree in co-relation 25969. Up to 3363 conditions per place. [2024-06-03 19:14:09,002 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 148 selfloop transitions, 33 changer transitions 0/189 dead transitions. [2024-06-03 19:14:09,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 1751 flow [2024-06-03 19:14:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:14:09,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:14:09,028 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1321 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:14:09,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 1751 flow [2024-06-03 19:14:09,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1683 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:09,185 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1327 flow [2024-06-03 19:14:09,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-03 19:14:09,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-03 19:14:09,186 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1327 flow [2024-06-03 19:14:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:09,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:09,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:09,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:14:09,186 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:09,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -375585746, now seen corresponding path program 2 times [2024-06-03 19:14:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:09,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284910432] [2024-06-03 19:14:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:09,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284910432] [2024-06-03 19:14:09,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284910432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:14:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729447341] [2024-06-03 19:14:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:14:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:14:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:14:09,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:09,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1327 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:09,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:09,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:09,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:10,527 INFO L124 PetriNetUnfolderBase]: 2879/4305 cut-off events. [2024-06-03 19:14:10,528 INFO L125 PetriNetUnfolderBase]: For 250432/250432 co-relation queries the response was YES. [2024-06-03 19:14:10,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29964 conditions, 4305 events. 2879/4305 cut-off events. For 250432/250432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20781 event pairs, 882 based on Foata normal form. 1/4303 useless extension candidates. Maximal degree in co-relation 29898. Up to 4175 conditions per place. [2024-06-03 19:14:10,561 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 12 changer transitions 0/172 dead transitions. [2024-06-03 19:14:10,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 172 transitions, 1659 flow [2024-06-03 19:14:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:14:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:14:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:14:10,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-03 19:14:10,562 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1327 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:14:10,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 172 transitions, 1659 flow [2024-06-03 19:14:10,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 1537 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:10,726 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1235 flow [2024-06-03 19:14:10,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-03 19:14:10,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-03 19:14:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1235 flow [2024-06-03 19:14:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:14:10,728 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -153776176, now seen corresponding path program 3 times [2024-06-03 19:14:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818089662] [2024-06-03 19:14:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:11,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:11,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818089662] [2024-06-03 19:14:11,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818089662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:11,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:11,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:14:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743169712] [2024-06-03 19:14:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:11,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:14:11,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:14:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:14:11,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:11,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1235 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:11,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:11,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:12,086 INFO L124 PetriNetUnfolderBase]: 2888/4319 cut-off events. [2024-06-03 19:14:12,086 INFO L125 PetriNetUnfolderBase]: For 261007/261007 co-relation queries the response was YES. [2024-06-03 19:14:12,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30019 conditions, 4319 events. 2888/4319 cut-off events. For 261007/261007 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20883 event pairs, 882 based on Foata normal form. 1/4317 useless extension candidates. Maximal degree in co-relation 29952. Up to 4157 conditions per place. [2024-06-03 19:14:12,121 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 146 selfloop transitions, 31 changer transitions 0/193 dead transitions. [2024-06-03 19:14:12,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 193 transitions, 1736 flow [2024-06-03 19:14:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 19:14:12,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-03 19:14:12,123 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1235 flow. Second operand 7 states and 128 transitions. [2024-06-03 19:14:12,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 193 transitions, 1736 flow [2024-06-03 19:14:12,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 193 transitions, 1710 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:14:12,360 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1416 flow [2024-06-03 19:14:12,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-03 19:14:12,360 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-03 19:14:12,360 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1416 flow [2024-06-03 19:14:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:12,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:12,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:12,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:14:12,361 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:12,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash -383198354, now seen corresponding path program 1 times [2024-06-03 19:14:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900549271] [2024-06-03 19:14:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:12,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900549271] [2024-06-03 19:14:12,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900549271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:12,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:12,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:14:12,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644175286] [2024-06-03 19:14:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:12,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:14:12,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:14:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:14:13,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:13,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1416 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:13,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:13,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:13,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:13,815 INFO L124 PetriNetUnfolderBase]: 2893/4326 cut-off events. [2024-06-03 19:14:13,816 INFO L125 PetriNetUnfolderBase]: For 273164/273164 co-relation queries the response was YES. [2024-06-03 19:14:13,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30964 conditions, 4326 events. 2893/4326 cut-off events. For 273164/273164 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20891 event pairs, 883 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 30894. Up to 4182 conditions per place. [2024-06-03 19:14:13,846 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 160 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-03 19:14:13,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 194 transitions, 1954 flow [2024-06-03 19:14:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 19:14:13,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-03 19:14:13,847 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1416 flow. Second operand 7 states and 119 transitions. [2024-06-03 19:14:13,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 194 transitions, 1954 flow [2024-06-03 19:14:13,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 194 transitions, 1894 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:13,993 INFO L231 Difference]: Finished difference. Result has 148 places, 182 transitions, 1472 flow [2024-06-03 19:14:13,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=148, PETRI_TRANSITIONS=182} [2024-06-03 19:14:13,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-03 19:14:13,994 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 182 transitions, 1472 flow [2024-06-03 19:14:13,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:13,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:13,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:13,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:14:13,995 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:13,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1067878492, now seen corresponding path program 2 times [2024-06-03 19:14:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075622069] [2024-06-03 19:14:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075622069] [2024-06-03 19:14:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075622069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:14,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601937481] [2024-06-03 19:14:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:14,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:14,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:14,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 182 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:14,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:14,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:15,602 INFO L124 PetriNetUnfolderBase]: 2890/4323 cut-off events. [2024-06-03 19:14:15,603 INFO L125 PetriNetUnfolderBase]: For 286147/286150 co-relation queries the response was YES. [2024-06-03 19:14:15,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4323 events. 2890/4323 cut-off events. For 286147/286150 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20942 event pairs, 886 based on Foata normal form. 3/4322 useless extension candidates. Maximal degree in co-relation 31483. Up to 4179 conditions per place. [2024-06-03 19:14:15,641 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 156 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2024-06-03 19:14:15,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 1842 flow [2024-06-03 19:14:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:14:15,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-03 19:14:15,642 INFO L175 Difference]: Start difference. First operand has 148 places, 182 transitions, 1472 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:14:15,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 1842 flow [2024-06-03 19:14:15,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 1779 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:15,905 INFO L231 Difference]: Finished difference. Result has 152 places, 182 transitions, 1451 flow [2024-06-03 19:14:15,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=152, PETRI_TRANSITIONS=182} [2024-06-03 19:14:15,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-03 19:14:15,906 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 182 transitions, 1451 flow [2024-06-03 19:14:15,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:15,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:15,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:15,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:14:15,907 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)] === [2024-06-03 19:14:15,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash -940111599, now seen corresponding path program 1 times [2024-06-03 19:14:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:15,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112680195] [2024-06-03 19:14:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112680195] [2024-06-03 19:14:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112680195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113548369] [2024-06-03 19:14:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 182 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:17,992 INFO L124 PetriNetUnfolderBase]: 2822/4250 cut-off events. [2024-06-03 19:14:17,992 INFO L125 PetriNetUnfolderBase]: For 299198/299198 co-relation queries the response was YES. [2024-06-03 19:14:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31389 conditions, 4250 events. 2822/4250 cut-off events. For 299198/299198 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20719 event pairs, 789 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 31316. Up to 4024 conditions per place. [2024-06-03 19:14:18,027 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 22 changer transitions 0/214 dead transitions. [2024-06-03 19:14:18,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 214 transitions, 1995 flow [2024-06-03 19:14:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:14:18,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-03 19:14:18,029 INFO L175 Difference]: Start difference. First operand has 152 places, 182 transitions, 1451 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:14:18,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 214 transitions, 1995 flow [2024-06-03 19:14:18,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 214 transitions, 1942 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:18,275 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 1517 flow [2024-06-03 19:14:18,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-03 19:14:18,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-03 19:14:18,276 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 1517 flow [2024-06-03 19:14:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:14:18,276 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:18,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1201643083, now seen corresponding path program 1 times [2024-06-03 19:14:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:18,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943908846] [2024-06-03 19:14:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943908846] [2024-06-03 19:14:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943908846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:19,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225937280] [2024-06-03 19:14:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:19,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:19,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:19,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:19,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:19,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:20,206 INFO L124 PetriNetUnfolderBase]: 2683/4101 cut-off events. [2024-06-03 19:14:20,206 INFO L125 PetriNetUnfolderBase]: For 307194/307197 co-relation queries the response was YES. [2024-06-03 19:14:20,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31234 conditions, 4101 events. 2683/4101 cut-off events. For 307194/307197 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20713 event pairs, 590 based on Foata normal form. 4/4096 useless extension candidates. Maximal degree in co-relation 31160. Up to 3398 conditions per place. [2024-06-03 19:14:20,240 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 150 selfloop transitions, 65 changer transitions 0/228 dead transitions. [2024-06-03 19:14:20,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2289 flow [2024-06-03 19:14:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:14:20,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-03 19:14:20,241 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 1517 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:14:20,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2289 flow [2024-06-03 19:14:20,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2214 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:14:20,481 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 1655 flow [2024-06-03 19:14:20,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-06-03 19:14:20,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-03 19:14:20,482 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 1655 flow [2024-06-03 19:14:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:20,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:20,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:14:20,483 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)] === [2024-06-03 19:14:20,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1976121419, now seen corresponding path program 2 times [2024-06-03 19:14:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:20,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105865943] [2024-06-03 19:14:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:21,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:21,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105865943] [2024-06-03 19:14:21,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105865943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:21,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:21,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515743529] [2024-06-03 19:14:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:21,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:21,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:21,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:21,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:22,499 INFO L124 PetriNetUnfolderBase]: 2737/4184 cut-off events. [2024-06-03 19:14:22,500 INFO L125 PetriNetUnfolderBase]: For 326144/326147 co-relation queries the response was YES. [2024-06-03 19:14:22,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32454 conditions, 4184 events. 2737/4184 cut-off events. For 326144/326147 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21226 event pairs, 739 based on Foata normal form. 4/4179 useless extension candidates. Maximal degree in co-relation 32379. Up to 3615 conditions per place. [2024-06-03 19:14:22,541 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 156 selfloop transitions, 65 changer transitions 0/234 dead transitions. [2024-06-03 19:14:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 234 transitions, 2470 flow [2024-06-03 19:14:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:14:22,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-03 19:14:22,543 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 1655 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:14:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 234 transitions, 2470 flow [2024-06-03 19:14:22,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2330 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:22,806 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 1757 flow [2024-06-03 19:14:22,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-06-03 19:14:22,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-03 19:14:22,806 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 1757 flow [2024-06-03 19:14:22,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:22,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:22,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:22,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:14:22,807 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)] === [2024-06-03 19:14:22,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765258, now seen corresponding path program 1 times [2024-06-03 19:14:22,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877343624] [2024-06-03 19:14:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:23,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877343624] [2024-06-03 19:14:23,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877343624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:23,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:23,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:23,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925104201] [2024-06-03 19:14:23,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:23,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:23,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:23,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:23,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 1757 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:23,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:23,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:23,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:25,076 INFO L124 PetriNetUnfolderBase]: 2782/4247 cut-off events. [2024-06-03 19:14:25,076 INFO L125 PetriNetUnfolderBase]: For 343036/343043 co-relation queries the response was YES. [2024-06-03 19:14:25,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33215 conditions, 4247 events. 2782/4247 cut-off events. For 343036/343043 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21507 event pairs, 690 based on Foata normal form. 4/4245 useless extension candidates. Maximal degree in co-relation 33138. Up to 3373 conditions per place. [2024-06-03 19:14:25,109 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 144 selfloop transitions, 97 changer transitions 0/254 dead transitions. [2024-06-03 19:14:25,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 254 transitions, 2651 flow [2024-06-03 19:14:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:14:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:14:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-03 19:14:25,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:14:25,111 INFO L175 Difference]: Start difference. First operand has 162 places, 198 transitions, 1757 flow. Second operand 12 states and 242 transitions. [2024-06-03 19:14:25,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 254 transitions, 2651 flow [2024-06-03 19:14:25,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 254 transitions, 2592 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:25,343 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 1996 flow [2024-06-03 19:14:25,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1996, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2024-06-03 19:14:25,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-03 19:14:25,343 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 1996 flow [2024-06-03 19:14:25,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:25,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:14:25,344 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)] === [2024-06-03 19:14:25,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765413, now seen corresponding path program 3 times [2024-06-03 19:14:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:25,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319917893] [2024-06-03 19:14:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:26,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319917893] [2024-06-03 19:14:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319917893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:26,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:26,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:26,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391417500] [2024-06-03 19:14:26,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:26,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 1996 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:26,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:26,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:26,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:27,480 INFO L124 PetriNetUnfolderBase]: 2791/4262 cut-off events. [2024-06-03 19:14:27,480 INFO L125 PetriNetUnfolderBase]: For 359319/359326 co-relation queries the response was YES. [2024-06-03 19:14:27,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34219 conditions, 4262 events. 2791/4262 cut-off events. For 359319/359326 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21617 event pairs, 737 based on Foata normal form. 8/4259 useless extension candidates. Maximal degree in co-relation 34140. Up to 3721 conditions per place. [2024-06-03 19:14:27,517 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 162 selfloop transitions, 72 changer transitions 0/247 dead transitions. [2024-06-03 19:14:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2624 flow [2024-06-03 19:14:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:14:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:14:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:14:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-03 19:14:27,519 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 1996 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:14:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2624 flow [2024-06-03 19:14:27,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 247 transitions, 2459 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:27,836 INFO L231 Difference]: Finished difference. Result has 174 places, 206 transitions, 2021 flow [2024-06-03 19:14:27,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=174, PETRI_TRANSITIONS=206} [2024-06-03 19:14:27,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-03 19:14:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 206 transitions, 2021 flow [2024-06-03 19:14:27,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:27,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:27,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:27,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:14:27,838 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)] === [2024-06-03 19:14:27,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1475858263, now seen corresponding path program 4 times [2024-06-03 19:14:27,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:27,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914739783] [2024-06-03 19:14:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:29,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:29,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914739783] [2024-06-03 19:14:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914739783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:29,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:29,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608465086] [2024-06-03 19:14:29,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:29,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:29,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 206 transitions, 2021 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:29,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:29,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:29,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:29,972 INFO L124 PetriNetUnfolderBase]: 2833/4328 cut-off events. [2024-06-03 19:14:29,973 INFO L125 PetriNetUnfolderBase]: For 374961/374968 co-relation queries the response was YES. [2024-06-03 19:14:29,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35169 conditions, 4328 events. 2833/4328 cut-off events. For 374961/374968 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21997 event pairs, 593 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 35088. Up to 3754 conditions per place. [2024-06-03 19:14:30,014 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 66 changer transitions 0/248 dead transitions. [2024-06-03 19:14:30,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 248 transitions, 2853 flow [2024-06-03 19:14:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 19:14:30,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-03 19:14:30,015 INFO L175 Difference]: Start difference. First operand has 174 places, 206 transitions, 2021 flow. Second operand 9 states and 188 transitions. [2024-06-03 19:14:30,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 248 transitions, 2853 flow [2024-06-03 19:14:30,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 248 transitions, 2693 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 19:14:30,332 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 2076 flow [2024-06-03 19:14:30,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2076, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-06-03 19:14:30,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-03 19:14:30,333 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 2076 flow [2024-06-03 19:14:30,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:30,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:30,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:30,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:14:30,333 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)] === [2024-06-03 19:14:30,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014629, now seen corresponding path program 5 times [2024-06-03 19:14:30,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:30,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310445062] [2024-06-03 19:14:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310445062] [2024-06-03 19:14:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310445062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:31,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:31,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:31,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402677875] [2024-06-03 19:14:31,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:31,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:31,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:31,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:31,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:31,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:31,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:31,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:32,444 INFO L124 PetriNetUnfolderBase]: 2850/4355 cut-off events. [2024-06-03 19:14:32,444 INFO L125 PetriNetUnfolderBase]: For 391015/391022 co-relation queries the response was YES. [2024-06-03 19:14:32,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35649 conditions, 4355 events. 2850/4355 cut-off events. For 391015/391022 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22213 event pairs, 744 based on Foata normal form. 4/4353 useless extension candidates. Maximal degree in co-relation 35567. Up to 3868 conditions per place. [2024-06-03 19:14:32,484 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-03 19:14:32,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 2714 flow [2024-06-03 19:14:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:14:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:14:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-03 19:14:32,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-03 19:14:32,485 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 2076 flow. Second operand 10 states and 201 transitions. [2024-06-03 19:14:32,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 2714 flow [2024-06-03 19:14:32,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 251 transitions, 2600 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:32,900 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2140 flow [2024-06-03 19:14:32,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-03 19:14:32,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-03 19:14:32,901 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2140 flow [2024-06-03 19:14:32,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:32,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:32,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:32,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:14:32,902 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)] === [2024-06-03 19:14:32,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014474, now seen corresponding path program 2 times [2024-06-03 19:14:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075452308] [2024-06-03 19:14:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:32,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075452308] [2024-06-03 19:14:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075452308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881843172] [2024-06-03 19:14:33,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:34,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:34,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2140 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:34,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:34,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:34,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:34,945 INFO L124 PetriNetUnfolderBase]: 2869/4393 cut-off events. [2024-06-03 19:14:34,946 INFO L125 PetriNetUnfolderBase]: For 406969/406972 co-relation queries the response was YES. [2024-06-03 19:14:34,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36274 conditions, 4393 events. 2869/4393 cut-off events. For 406969/406972 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22595 event pairs, 690 based on Foata normal form. 4/4393 useless extension candidates. Maximal degree in co-relation 36190. Up to 3525 conditions per place. [2024-06-03 19:14:34,987 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 103 changer transitions 0/268 dead transitions. [2024-06-03 19:14:34,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 268 transitions, 3528 flow [2024-06-03 19:14:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 19:14:34,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025252525252525 [2024-06-03 19:14:34,988 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2140 flow. Second operand 9 states and 199 transitions. [2024-06-03 19:14:34,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 268 transitions, 3528 flow [2024-06-03 19:14:35,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 3382 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:35,454 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2528 flow [2024-06-03 19:14:35,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2528, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-03 19:14:35,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-03 19:14:35,455 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2528 flow [2024-06-03 19:14:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:35,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:35,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:35,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:14:35,456 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)] === [2024-06-03 19:14:35,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1944630437, now seen corresponding path program 6 times [2024-06-03 19:14:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:35,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381987884] [2024-06-03 19:14:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381987884] [2024-06-03 19:14:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381987884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426217424] [2024-06-03 19:14:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:36,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:36,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:36,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:36,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2528 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:36,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:36,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:36,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:37,684 INFO L124 PetriNetUnfolderBase]: 2861/4381 cut-off events. [2024-06-03 19:14:37,684 INFO L125 PetriNetUnfolderBase]: For 422332/422335 co-relation queries the response was YES. [2024-06-03 19:14:37,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37616 conditions, 4381 events. 2861/4381 cut-off events. For 422332/422335 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22486 event pairs, 726 based on Foata normal form. 4/4376 useless extension candidates. Maximal degree in co-relation 37528. Up to 3886 conditions per place. [2024-06-03 19:14:37,727 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 191 selfloop transitions, 51 changer transitions 0/255 dead transitions. [2024-06-03 19:14:37,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3106 flow [2024-06-03 19:14:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:14:37,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:14:37,733 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2528 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:14:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3106 flow [2024-06-03 19:14:38,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 3045 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:38,258 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 2576 flow [2024-06-03 19:14:38,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-03 19:14:38,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-03 19:14:38,258 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 2576 flow [2024-06-03 19:14:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:38,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:38,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:14:38,259 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:38,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1833870324, now seen corresponding path program 3 times [2024-06-03 19:14:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:38,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506047975] [2024-06-03 19:14:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:39,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506047975] [2024-06-03 19:14:39,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506047975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628003763] [2024-06-03 19:14:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:39,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:39,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 2576 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:39,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:39,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:39,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:40,222 INFO L124 PetriNetUnfolderBase]: 2915/4459 cut-off events. [2024-06-03 19:14:40,222 INFO L125 PetriNetUnfolderBase]: For 442456/442459 co-relation queries the response was YES. [2024-06-03 19:14:40,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 4459 events. 2915/4459 cut-off events. For 442456/442459 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23032 event pairs, 686 based on Foata normal form. 4/4459 useless extension candidates. Maximal degree in co-relation 38534. Up to 3720 conditions per place. [2024-06-03 19:14:40,267 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 168 selfloop transitions, 91 changer transitions 0/272 dead transitions. [2024-06-03 19:14:40,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 3894 flow [2024-06-03 19:14:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 19:14:40,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-03 19:14:40,269 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 2576 flow. Second operand 9 states and 196 transitions. [2024-06-03 19:14:40,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 3894 flow [2024-06-03 19:14:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 272 transitions, 3626 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-03 19:14:40,816 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2606 flow [2024-06-03 19:14:40,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-03 19:14:40,817 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-03 19:14:40,817 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2606 flow [2024-06-03 19:14:40,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:40,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:40,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:40,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:14:40,818 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:40,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1833864744, now seen corresponding path program 4 times [2024-06-03 19:14:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807800309] [2024-06-03 19:14:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:41,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:41,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807800309] [2024-06-03 19:14:41,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807800309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:41,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:41,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:41,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342277231] [2024-06-03 19:14:41,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:41,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:41,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:42,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:42,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:42,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:42,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:42,937 INFO L124 PetriNetUnfolderBase]: 2905/4445 cut-off events. [2024-06-03 19:14:42,937 INFO L125 PetriNetUnfolderBase]: For 454477/454480 co-relation queries the response was YES. [2024-06-03 19:14:42,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38402 conditions, 4445 events. 2905/4445 cut-off events. For 454477/454480 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22942 event pairs, 686 based on Foata normal form. 4/4445 useless extension candidates. Maximal degree in co-relation 38313. Up to 3772 conditions per place. [2024-06-03 19:14:42,974 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 174 selfloop transitions, 78 changer transitions 0/265 dead transitions. [2024-06-03 19:14:42,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 265 transitions, 3222 flow [2024-06-03 19:14:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:14:42,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:14:42,975 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2606 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:14:42,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 265 transitions, 3222 flow [2024-06-03 19:14:43,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 265 transitions, 3058 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:43,416 INFO L231 Difference]: Finished difference. Result has 193 places, 230 transitions, 2606 flow [2024-06-03 19:14:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=193, PETRI_TRANSITIONS=230} [2024-06-03 19:14:43,416 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-03 19:14:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 230 transitions, 2606 flow [2024-06-03 19:14:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:43,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:43,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:14:43,417 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:43,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1828300554, now seen corresponding path program 5 times [2024-06-03 19:14:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655371790] [2024-06-03 19:14:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655371790] [2024-06-03 19:14:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655371790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:44,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314567194] [2024-06-03 19:14:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:44,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:44,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:44,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:44,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:44,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:45,508 INFO L124 PetriNetUnfolderBase]: 2927/4482 cut-off events. [2024-06-03 19:14:45,509 INFO L125 PetriNetUnfolderBase]: For 471144/471147 co-relation queries the response was YES. [2024-06-03 19:14:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 4482 events. 2927/4482 cut-off events. For 471144/471147 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23210 event pairs, 700 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 39020. Up to 3771 conditions per place. [2024-06-03 19:14:45,549 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 177 selfloop transitions, 78 changer transitions 0/268 dead transitions. [2024-06-03 19:14:45,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 268 transitions, 3481 flow [2024-06-03 19:14:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 19:14:45,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-03 19:14:45,551 INFO L175 Difference]: Start difference. First operand has 193 places, 230 transitions, 2606 flow. Second operand 9 states and 185 transitions. [2024-06-03 19:14:45,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 268 transitions, 3481 flow [2024-06-03 19:14:45,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 268 transitions, 3315 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:45,969 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2667 flow [2024-06-03 19:14:45,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2667, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-03 19:14:45,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-03 19:14:45,970 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2667 flow [2024-06-03 19:14:45,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:45,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:45,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:14:45,970 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:45,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1828508099, now seen corresponding path program 7 times [2024-06-03 19:14:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:45,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314692243] [2024-06-03 19:14:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:45,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314692243] [2024-06-03 19:14:46,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314692243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:46,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34315759] [2024-06-03 19:14:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:47,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:47,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2667 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:47,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:47,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:47,950 INFO L124 PetriNetUnfolderBase]: 2944/4509 cut-off events. [2024-06-03 19:14:47,950 INFO L125 PetriNetUnfolderBase]: For 489028/489031 co-relation queries the response was YES. [2024-06-03 19:14:47,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39609 conditions, 4509 events. 2944/4509 cut-off events. For 489028/489031 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23390 event pairs, 741 based on Foata normal form. 4/4504 useless extension candidates. Maximal degree in co-relation 39517. Up to 4064 conditions per place. [2024-06-03 19:14:47,993 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 208 selfloop transitions, 44 changer transitions 0/265 dead transitions. [2024-06-03 19:14:47,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 265 transitions, 3299 flow [2024-06-03 19:14:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:14:47,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-03 19:14:47,995 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2667 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:14:47,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 265 transitions, 3299 flow [2024-06-03 19:14:48,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 265 transitions, 3150 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:14:48,520 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2653 flow [2024-06-03 19:14:48,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2653, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-03 19:14:48,521 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-03 19:14:48,521 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2653 flow [2024-06-03 19:14:48,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:48,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:48,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:14:48,522 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1828507944, now seen corresponding path program 6 times [2024-06-03 19:14:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348102917] [2024-06-03 19:14:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:49,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348102917] [2024-06-03 19:14:49,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348102917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:49,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:49,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279491317] [2024-06-03 19:14:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:49,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:49,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2653 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:49,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:49,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:49,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:50,509 INFO L124 PetriNetUnfolderBase]: 2998/4587 cut-off events. [2024-06-03 19:14:50,509 INFO L125 PetriNetUnfolderBase]: For 512347/512350 co-relation queries the response was YES. [2024-06-03 19:14:50,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40513 conditions, 4587 events. 2998/4587 cut-off events. For 512347/512350 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23879 event pairs, 698 based on Foata normal form. 4/4587 useless extension candidates. Maximal degree in co-relation 40420. Up to 3820 conditions per place. [2024-06-03 19:14:50,557 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-03 19:14:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 279 transitions, 3841 flow [2024-06-03 19:14:50,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 19:14:50,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-03 19:14:50,558 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2653 flow. Second operand 9 states and 190 transitions. [2024-06-03 19:14:50,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 279 transitions, 3841 flow [2024-06-03 19:14:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 279 transitions, 3728 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:51,087 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2850 flow [2024-06-03 19:14:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2850, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-03 19:14:51,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-03 19:14:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2850 flow [2024-06-03 19:14:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:14:51,088 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1828502364, now seen corresponding path program 7 times [2024-06-03 19:14:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055847660] [2024-06-03 19:14:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:52,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055847660] [2024-06-03 19:14:52,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055847660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:52,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:52,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489917675] [2024-06-03 19:14:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:52,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:52,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:14:52,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:52,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:52,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:14:52,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:53,322 INFO L124 PetriNetUnfolderBase]: 2988/4573 cut-off events. [2024-06-03 19:14:53,322 INFO L125 PetriNetUnfolderBase]: For 525254/525257 co-relation queries the response was YES. [2024-06-03 19:14:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40748 conditions, 4573 events. 2988/4573 cut-off events. For 525254/525257 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23749 event pairs, 696 based on Foata normal form. 4/4573 useless extension candidates. Maximal degree in co-relation 40654. Up to 3895 conditions per place. [2024-06-03 19:14:53,368 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 192 selfloop transitions, 70 changer transitions 0/275 dead transitions. [2024-06-03 19:14:53,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 275 transitions, 3484 flow [2024-06-03 19:14:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:14:53,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-03 19:14:53,369 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2850 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:14:53,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 275 transitions, 3484 flow [2024-06-03 19:14:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 275 transitions, 3324 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:53,909 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2838 flow [2024-06-03 19:14:53,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2838, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-03 19:14:53,909 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-03 19:14:53,909 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2838 flow [2024-06-03 19:14:53,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:53,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:53,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:53,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:14:53,910 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)] === [2024-06-03 19:14:53,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1039443248, now seen corresponding path program 1 times [2024-06-03 19:14:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916860262] [2024-06-03 19:14:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:54,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916860262] [2024-06-03 19:14:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916860262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:54,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:54,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:14:54,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515174020] [2024-06-03 19:14:54,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:54,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:14:54,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:14:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:14:54,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:54,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2838 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:54,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:54,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:54,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:55,741 INFO L124 PetriNetUnfolderBase]: 3332/5000 cut-off events. [2024-06-03 19:14:55,742 INFO L125 PetriNetUnfolderBase]: For 556862/556865 co-relation queries the response was YES. [2024-06-03 19:14:55,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 5000 events. 3332/5000 cut-off events. For 556862/556865 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25068 event pairs, 896 based on Foata normal form. 4/5000 useless extension candidates. Maximal degree in co-relation 44224. Up to 4661 conditions per place. [2024-06-03 19:14:55,794 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-03 19:14:55,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 280 transitions, 3911 flow [2024-06-03 19:14:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:14:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:14:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:14:55,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:14:55,796 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2838 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:14:55,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 280 transitions, 3911 flow [2024-06-03 19:14:56,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 3739 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:56,405 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 3089 flow [2024-06-03 19:14:56,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3089, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-03 19:14:56,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-03 19:14:56,406 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 3089 flow [2024-06-03 19:14:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:56,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:56,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:14:56,407 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)] === [2024-06-03 19:14:56,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1664935472, now seen corresponding path program 2 times [2024-06-03 19:14:56,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:56,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907033467] [2024-06-03 19:14:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907033467] [2024-06-03 19:14:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907033467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396427444] [2024-06-03 19:14:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:57,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:57,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 3089 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) [2024-06-03 19:14:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:58,046 INFO L124 PetriNetUnfolderBase]: 3372/5055 cut-off events. [2024-06-03 19:14:58,046 INFO L125 PetriNetUnfolderBase]: For 583664/583667 co-relation queries the response was YES. [2024-06-03 19:14:58,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45622 conditions, 5055 events. 3372/5055 cut-off events. For 583664/583667 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25371 event pairs, 893 based on Foata normal form. 6/5057 useless extension candidates. Maximal degree in co-relation 45523. Up to 4624 conditions per place. [2024-06-03 19:14:58,101 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 206 selfloop transitions, 62 changer transitions 0/294 dead transitions. [2024-06-03 19:14:58,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 294 transitions, 4179 flow [2024-06-03 19:14:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:14:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:14:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:14:58,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:14:58,102 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 3089 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:14:58,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 294 transitions, 4179 flow [2024-06-03 19:14:58,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 294 transitions, 4088 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 19:14:58,780 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3427 flow [2024-06-03 19:14:58,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3427, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-03 19:14:58,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-03 19:14:58,781 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3427 flow [2024-06-03 19:14:58,781 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) [2024-06-03 19:14:58,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:58,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:58,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:14:58,782 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)] === [2024-06-03 19:14:58,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash 828438112, now seen corresponding path program 1 times [2024-06-03 19:14:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:58,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628628314] [2024-06-03 19:14:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628628314] [2024-06-03 19:14:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628628314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:59,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:14:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321351533] [2024-06-03 19:14:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:14:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:14:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:14:59,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:14:59,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3427 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) [2024-06-03 19:14:59,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:59,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:14:59,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:00,583 INFO L124 PetriNetUnfolderBase]: 3403/5096 cut-off events. [2024-06-03 19:15:00,583 INFO L125 PetriNetUnfolderBase]: For 609646/609646 co-relation queries the response was YES. [2024-06-03 19:15:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 5096 events. 3403/5096 cut-off events. For 609646/609646 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25519 event pairs, 886 based on Foata normal form. 3/5096 useless extension candidates. Maximal degree in co-relation 47131. Up to 4833 conditions per place. [2024-06-03 19:15:00,643 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 241 selfloop transitions, 37 changer transitions 0/304 dead transitions. [2024-06-03 19:15:00,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 304 transitions, 4257 flow [2024-06-03 19:15:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:15:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:15:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:15:00,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-03 19:15:00,644 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3427 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:15:00,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 304 transitions, 4257 flow [2024-06-03 19:15:01,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 304 transitions, 4124 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-03 19:15:01,325 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3503 flow [2024-06-03 19:15:01,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3503, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-03 19:15:01,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-03 19:15:01,327 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3503 flow [2024-06-03 19:15:01,327 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) [2024-06-03 19:15:01,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:01,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:01,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:15:01,327 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:01,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -640876824, now seen corresponding path program 8 times [2024-06-03 19:15:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:01,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953423662] [2024-06-03 19:15:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953423662] [2024-06-03 19:15:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953423662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896256561] [2024-06-03 19:15:02,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:02,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:02,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:02,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3503 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:02,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:02,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:02,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:03,435 INFO L124 PetriNetUnfolderBase]: 3176/4840 cut-off events. [2024-06-03 19:15:03,436 INFO L125 PetriNetUnfolderBase]: For 622648/622651 co-relation queries the response was YES. [2024-06-03 19:15:03,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46286 conditions, 4840 events. 3176/4840 cut-off events. For 622648/622651 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 25268 event pairs, 762 based on Foata normal form. 8/4839 useless extension candidates. Maximal degree in co-relation 46181. Up to 4430 conditions per place. [2024-06-03 19:15:03,487 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 265 selfloop transitions, 36 changer transitions 0/321 dead transitions. [2024-06-03 19:15:03,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 321 transitions, 4712 flow [2024-06-03 19:15:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:15:03,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-03 19:15:03,489 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3503 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:15:03,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 321 transitions, 4712 flow [2024-06-03 19:15:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 321 transitions, 4652 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 19:15:04,276 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 3602 flow [2024-06-03 19:15:04,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3602, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-03 19:15:04,277 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-03 19:15:04,277 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 3602 flow [2024-06-03 19:15:04,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:04,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:04,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:15:04,277 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:04,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 921301336, now seen corresponding path program 1 times [2024-06-03 19:15:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470999904] [2024-06-03 19:15:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:05,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:05,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470999904] [2024-06-03 19:15:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470999904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:15:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051751482] [2024-06-03 19:15:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:15:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:15:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:15:05,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:05,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 3602 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) [2024-06-03 19:15:05,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:05,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:05,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:06,553 INFO L124 PetriNetUnfolderBase]: 3446/5163 cut-off events. [2024-06-03 19:15:06,553 INFO L125 PetriNetUnfolderBase]: For 644898/644898 co-relation queries the response was YES. [2024-06-03 19:15:06,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48914 conditions, 5163 events. 3446/5163 cut-off events. For 644898/644898 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25942 event pairs, 840 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 48806. Up to 4895 conditions per place. [2024-06-03 19:15:06,608 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 274 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-03 19:15:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 318 transitions, 4327 flow [2024-06-03 19:15:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:15:06,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-03 19:15:06,609 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 3602 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:15:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 318 transitions, 4327 flow [2024-06-03 19:15:07,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 318 transitions, 3983 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-03 19:15:07,414 INFO L231 Difference]: Finished difference. Result has 223 places, 291 transitions, 3371 flow [2024-06-03 19:15:07,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3371, PETRI_PLACES=223, PETRI_TRANSITIONS=291} [2024-06-03 19:15:07,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-03 19:15:07,415 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 291 transitions, 3371 flow [2024-06-03 19:15:07,415 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) [2024-06-03 19:15:07,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:07,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:15:07,415 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:07,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -648026664, now seen corresponding path program 9 times [2024-06-03 19:15:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670119995] [2024-06-03 19:15:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:08,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:08,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670119995] [2024-06-03 19:15:08,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670119995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:08,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:08,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:08,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186322313] [2024-06-03 19:15:08,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:08,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:08,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:08,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:08,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 291 transitions, 3371 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:08,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:08,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:08,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:09,692 INFO L124 PetriNetUnfolderBase]: 3225/4913 cut-off events. [2024-06-03 19:15:09,693 INFO L125 PetriNetUnfolderBase]: For 655144/655151 co-relation queries the response was YES. [2024-06-03 19:15:09,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 4913 events. 3225/4913 cut-off events. For 655144/655151 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25751 event pairs, 709 based on Foata normal form. 6/4913 useless extension candidates. Maximal degree in co-relation 46835. Up to 4409 conditions per place. [2024-06-03 19:15:09,754 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 46 changer transitions 0/326 dead transitions. [2024-06-03 19:15:09,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 326 transitions, 4384 flow [2024-06-03 19:15:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:15:09,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:15:09,756 INFO L175 Difference]: Start difference. First operand has 223 places, 291 transitions, 3371 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:15:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 326 transitions, 4384 flow [2024-06-03 19:15:10,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 326 transitions, 4328 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:15:10,475 INFO L231 Difference]: Finished difference. Result has 224 places, 294 transitions, 3496 flow [2024-06-03 19:15:10,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=224, PETRI_TRANSITIONS=294} [2024-06-03 19:15:10,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-03 19:15:10,476 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 294 transitions, 3496 flow [2024-06-03 19:15:10,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:10,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:10,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:15:10,476 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:10,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 655067880, now seen corresponding path program 10 times [2024-06-03 19:15:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813405753] [2024-06-03 19:15:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813405753] [2024-06-03 19:15:11,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813405753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:11,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121304687] [2024-06-03 19:15:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:11,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:11,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 294 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:11,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:11,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:11,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:12,701 INFO L124 PetriNetUnfolderBase]: 3247/4950 cut-off events. [2024-06-03 19:15:12,702 INFO L125 PetriNetUnfolderBase]: For 677216/677223 co-relation queries the response was YES. [2024-06-03 19:15:12,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47746 conditions, 4950 events. 3247/4950 cut-off events. For 677216/677223 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26029 event pairs, 704 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 47637. Up to 4470 conditions per place. [2024-06-03 19:15:12,762 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 266 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-03 19:15:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 4285 flow [2024-06-03 19:15:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:15:12,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:15:12,764 INFO L175 Difference]: Start difference. First operand has 224 places, 294 transitions, 3496 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:15:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 4285 flow [2024-06-03 19:15:13,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 327 transitions, 4143 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:13,577 INFO L231 Difference]: Finished difference. Result has 226 places, 297 transitions, 3531 flow [2024-06-03 19:15:13,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3531, PETRI_PLACES=226, PETRI_TRANSITIONS=297} [2024-06-03 19:15:13,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 19:15:13,578 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 297 transitions, 3531 flow [2024-06-03 19:15:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:13,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:13,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:13,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:15:13,579 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:13,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash 655062145, now seen corresponding path program 8 times [2024-06-03 19:15:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:13,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502559752] [2024-06-03 19:15:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502559752] [2024-06-03 19:15:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502559752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:14,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:14,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745805467] [2024-06-03 19:15:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:14,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 297 transitions, 3531 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:15,721 INFO L124 PetriNetUnfolderBase]: 3239/4938 cut-off events. [2024-06-03 19:15:15,722 INFO L125 PetriNetUnfolderBase]: For 690171/690178 co-relation queries the response was YES. [2024-06-03 19:15:15,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 4938 events. 3239/4938 cut-off events. For 690171/690178 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25975 event pairs, 727 based on Foata normal form. 6/4938 useless extension candidates. Maximal degree in co-relation 47549. Up to 4600 conditions per place. [2024-06-03 19:15:15,779 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 22 changer transitions 0/324 dead transitions. [2024-06-03 19:15:15,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 324 transitions, 4219 flow [2024-06-03 19:15:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:15:15,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-03 19:15:15,781 INFO L175 Difference]: Start difference. First operand has 226 places, 297 transitions, 3531 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:15:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 324 transitions, 4219 flow [2024-06-03 19:15:16,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 324 transitions, 4061 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:16,667 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 3424 flow [2024-06-03 19:15:16,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3424, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2024-06-03 19:15:16,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-03 19:15:16,667 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 3424 flow [2024-06-03 19:15:16,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:16,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:15:16,668 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:16,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1599224210, now seen corresponding path program 11 times [2024-06-03 19:15:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800073340] [2024-06-03 19:15:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800073340] [2024-06-03 19:15:17,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800073340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:17,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:17,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:17,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349942349] [2024-06-03 19:15:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:17,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:17,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:17,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:17,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 3424 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:17,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:17,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:17,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:18,936 INFO L124 PetriNetUnfolderBase]: 3229/4924 cut-off events. [2024-06-03 19:15:18,937 INFO L125 PetriNetUnfolderBase]: For 702458/702465 co-relation queries the response was YES. [2024-06-03 19:15:18,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47281 conditions, 4924 events. 3229/4924 cut-off events. For 702458/702465 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25892 event pairs, 700 based on Foata normal form. 6/4924 useless extension candidates. Maximal degree in co-relation 47170. Up to 4317 conditions per place. [2024-06-03 19:15:18,985 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 246 selfloop transitions, 63 changer transitions 0/329 dead transitions. [2024-06-03 19:15:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4380 flow [2024-06-03 19:15:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:15:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:15:18,987 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 3424 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:15:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4380 flow [2024-06-03 19:15:19,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4295 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:15:19,548 INFO L231 Difference]: Finished difference. Result has 229 places, 297 transitions, 3473 flow [2024-06-03 19:15:19,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3473, PETRI_PLACES=229, PETRI_TRANSITIONS=297} [2024-06-03 19:15:19,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-03 19:15:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 297 transitions, 3473 flow [2024-06-03 19:15:19,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:19,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:19,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:15:19,549 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)] === [2024-06-03 19:15:19,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1242220222, now seen corresponding path program 2 times [2024-06-03 19:15:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:19,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025749602] [2024-06-03 19:15:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025749602] [2024-06-03 19:15:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025749602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:20,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:20,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441497907] [2024-06-03 19:15:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:20,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:20,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 297 transitions, 3473 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) [2024-06-03 19:15:20,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:20,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:21,447 INFO L124 PetriNetUnfolderBase]: 3505/5248 cut-off events. [2024-06-03 19:15:21,448 INFO L125 PetriNetUnfolderBase]: For 729142/729142 co-relation queries the response was YES. [2024-06-03 19:15:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49829 conditions, 5248 events. 3505/5248 cut-off events. For 729142/729142 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26410 event pairs, 907 based on Foata normal form. 3/5248 useless extension candidates. Maximal degree in co-relation 49717. Up to 5042 conditions per place. [2024-06-03 19:15:21,509 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 269 selfloop transitions, 16 changer transitions 0/311 dead transitions. [2024-06-03 19:15:21,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 4123 flow [2024-06-03 19:15:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:15:21,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-03 19:15:21,510 INFO L175 Difference]: Start difference. First operand has 229 places, 297 transitions, 3473 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:15:21,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 4123 flow [2024-06-03 19:15:22,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 3761 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-03 19:15:22,468 INFO L231 Difference]: Finished difference. Result has 227 places, 300 transitions, 3205 flow [2024-06-03 19:15:22,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3205, PETRI_PLACES=227, PETRI_TRANSITIONS=300} [2024-06-03 19:15:22,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-03 19:15:22,468 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 300 transitions, 3205 flow [2024-06-03 19:15:22,469 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) [2024-06-03 19:15:22,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:22,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:15:22,469 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)] === [2024-06-03 19:15:22,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1027063088, now seen corresponding path program 3 times [2024-06-03 19:15:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377304375] [2024-06-03 19:15:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:23,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377304375] [2024-06-03 19:15:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377304375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:23,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:23,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044985989] [2024-06-03 19:15:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:23,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:23,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:23,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 300 transitions, 3205 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) [2024-06-03 19:15:23,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:23,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:23,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:24,186 INFO L124 PetriNetUnfolderBase]: 3501/5244 cut-off events. [2024-06-03 19:15:24,186 INFO L125 PetriNetUnfolderBase]: For 740906/740909 co-relation queries the response was YES. [2024-06-03 19:15:24,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48500 conditions, 5244 events. 3501/5244 cut-off events. For 740906/740909 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26372 event pairs, 909 based on Foata normal form. 4/5244 useless extension candidates. Maximal degree in co-relation 48389. Up to 5012 conditions per place. [2024-06-03 19:15:24,244 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 258 selfloop transitions, 26 changer transitions 0/310 dead transitions. [2024-06-03 19:15:24,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 3933 flow [2024-06-03 19:15:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:15:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:15:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:15:24,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-03 19:15:24,245 INFO L175 Difference]: Start difference. First operand has 227 places, 300 transitions, 3205 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:15:24,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 3933 flow [2024-06-03 19:15:25,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 310 transitions, 3838 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:25,424 INFO L231 Difference]: Finished difference. Result has 228 places, 300 transitions, 3170 flow [2024-06-03 19:15:25,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=228, PETRI_TRANSITIONS=300} [2024-06-03 19:15:25,425 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-03 19:15:25,425 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 300 transitions, 3170 flow [2024-06-03 19:15:25,425 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) [2024-06-03 19:15:25,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:25,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:15:25,426 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)] === [2024-06-03 19:15:25,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 840460222, now seen corresponding path program 3 times [2024-06-03 19:15:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031665273] [2024-06-03 19:15:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031665273] [2024-06-03 19:15:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031665273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871586882] [2024-06-03 19:15:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:26,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:26,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 300 transitions, 3170 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:26,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:26,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:27,193 INFO L124 PetriNetUnfolderBase]: 3492/5231 cut-off events. [2024-06-03 19:15:27,193 INFO L125 PetriNetUnfolderBase]: For 756586/756586 co-relation queries the response was YES. [2024-06-03 19:15:27,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 5231 events. 3492/5231 cut-off events. For 756586/756586 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 26330 event pairs, 903 based on Foata normal form. 3/5231 useless extension candidates. Maximal degree in co-relation 48304. Up to 5013 conditions per place. [2024-06-03 19:15:27,251 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 266 selfloop transitions, 21 changer transitions 0/313 dead transitions. [2024-06-03 19:15:27,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 313 transitions, 3780 flow [2024-06-03 19:15:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:15:27,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:15:27,252 INFO L175 Difference]: Start difference. First operand has 228 places, 300 transitions, 3170 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:15:27,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 313 transitions, 3780 flow [2024-06-03 19:15:27,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 313 transitions, 3659 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:15:27,952 INFO L231 Difference]: Finished difference. Result has 231 places, 300 transitions, 3097 flow [2024-06-03 19:15:27,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3097, PETRI_PLACES=231, PETRI_TRANSITIONS=300} [2024-06-03 19:15:27,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-03 19:15:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 300 transitions, 3097 flow [2024-06-03 19:15:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:27,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:27,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:27,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:15:27,953 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)] === [2024-06-03 19:15:27,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash 440946362, now seen corresponding path program 4 times [2024-06-03 19:15:27,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:27,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860321799] [2024-06-03 19:15:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:27,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860321799] [2024-06-03 19:15:28,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860321799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:28,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:28,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:28,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655635781] [2024-06-03 19:15:28,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:28,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:28,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:28,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:28,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 300 transitions, 3097 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) [2024-06-03 19:15:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:29,728 INFO L124 PetriNetUnfolderBase]: 3553/5322 cut-off events. [2024-06-03 19:15:29,729 INFO L125 PetriNetUnfolderBase]: For 776817/776823 co-relation queries the response was YES. [2024-06-03 19:15:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49317 conditions, 5322 events. 3553/5322 cut-off events. For 776817/776823 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 26844 event pairs, 897 based on Foata normal form. 6/5324 useless extension candidates. Maximal degree in co-relation 49205. Up to 4858 conditions per place. [2024-06-03 19:15:29,790 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 231 selfloop transitions, 90 changer transitions 0/347 dead transitions. [2024-06-03 19:15:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 347 transitions, 4357 flow [2024-06-03 19:15:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:15:29,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:15:29,792 INFO L175 Difference]: Start difference. First operand has 231 places, 300 transitions, 3097 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:15:29,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 347 transitions, 4357 flow [2024-06-03 19:15:30,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 4277 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:30,640 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 3541 flow [2024-06-03 19:15:30,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-03 19:15:30,640 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-03 19:15:30,640 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 3541 flow [2024-06-03 19:15:30,640 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) [2024-06-03 19:15:30,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:30,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:15:30,641 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)] === [2024-06-03 19:15:30,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -523221044, now seen corresponding path program 5 times [2024-06-03 19:15:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632503100] [2024-06-03 19:15:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632503100] [2024-06-03 19:15:31,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632503100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:31,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611661898] [2024-06-03 19:15:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:31,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:31,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:31,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 3541 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) [2024-06-03 19:15:31,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:31,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:31,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:32,539 INFO L124 PetriNetUnfolderBase]: 3632/5438 cut-off events. [2024-06-03 19:15:32,540 INFO L125 PetriNetUnfolderBase]: For 800558/800565 co-relation queries the response was YES. [2024-06-03 19:15:32,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51283 conditions, 5438 events. 3632/5438 cut-off events. For 800558/800565 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27565 event pairs, 906 based on Foata normal form. 6/5440 useless extension candidates. Maximal degree in co-relation 51168. Up to 4919 conditions per place. [2024-06-03 19:15:32,603 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-03 19:15:32,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 5063 flow [2024-06-03 19:15:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:15:32,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:15:32,604 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 3541 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:15:32,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 5063 flow [2024-06-03 19:15:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 377 transitions, 4948 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-03 19:15:33,650 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 4220 flow [2024-06-03 19:15:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2024-06-03 19:15:33,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-03 19:15:33,650 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 4220 flow [2024-06-03 19:15:33,650 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) [2024-06-03 19:15:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:33,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:33,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:15:33,651 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)] === [2024-06-03 19:15:33,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1050658374, now seen corresponding path program 1 times [2024-06-03 19:15:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902072976] [2024-06-03 19:15:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902072976] [2024-06-03 19:15:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902072976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:34,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818234648] [2024-06-03 19:15:34,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-03 19:15:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 4220 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:34,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-03 19:15:34,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:35,595 INFO L124 PetriNetUnfolderBase]: 3799/5607 cut-off events. [2024-06-03 19:15:35,596 INFO L125 PetriNetUnfolderBase]: For 821408/821408 co-relation queries the response was YES. [2024-06-03 19:15:35,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 5607 events. 3799/5607 cut-off events. For 821408/821408 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27696 event pairs, 927 based on Foata normal form. 1/5605 useless extension candidates. Maximal degree in co-relation 53235. Up to 5543 conditions per place. [2024-06-03 19:15:35,663 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 346 selfloop transitions, 25 changer transitions 0/374 dead transitions. [2024-06-03 19:15:35,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 374 transitions, 5242 flow [2024-06-03 19:15:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:15:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:15:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:15:35,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-03 19:15:35,665 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 4220 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:15:35,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 374 transitions, 5242 flow [2024-06-03 19:15:36,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 374 transitions, 5151 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 19:15:36,769 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 4271 flow [2024-06-03 19:15:36,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4271, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-03 19:15:36,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-03 19:15:36,770 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 4271 flow [2024-06-03 19:15:36,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:36,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:36,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:36,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:15:36,770 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)] === [2024-06-03 19:15:36,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1005753896, now seen corresponding path program 2 times [2024-06-03 19:15:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:36,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170368323] [2024-06-03 19:15:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170368323] [2024-06-03 19:15:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170368323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119111628] [2024-06-03 19:15:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-03 19:15:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 4271 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:37,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:37,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-03 19:15:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:38,868 INFO L124 PetriNetUnfolderBase]: 3804/5614 cut-off events. [2024-06-03 19:15:38,868 INFO L125 PetriNetUnfolderBase]: For 844798/844798 co-relation queries the response was YES. [2024-06-03 19:15:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53834 conditions, 5614 events. 3804/5614 cut-off events. For 844798/844798 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27822 event pairs, 927 based on Foata normal form. 1/5612 useless extension candidates. Maximal degree in co-relation 53713. Up to 5549 conditions per place. [2024-06-03 19:15:38,928 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 344 selfloop transitions, 27 changer transitions 0/374 dead transitions. [2024-06-03 19:15:38,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 374 transitions, 5247 flow [2024-06-03 19:15:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:15:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:15:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:15:38,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-03 19:15:38,930 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 4271 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:15:38,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 374 transitions, 5247 flow [2024-06-03 19:15:39,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 374 transitions, 5174 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 19:15:39,723 INFO L231 Difference]: Finished difference. Result has 251 places, 361 transitions, 4304 flow [2024-06-03 19:15:39,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4304, PETRI_PLACES=251, PETRI_TRANSITIONS=361} [2024-06-03 19:15:39,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-03 19:15:39,723 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 361 transitions, 4304 flow [2024-06-03 19:15:39,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:39,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:39,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:39,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:15:39,724 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)] === [2024-06-03 19:15:39,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1005754144, now seen corresponding path program 1 times [2024-06-03 19:15:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:39,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415346174] [2024-06-03 19:15:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415346174] [2024-06-03 19:15:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415346174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:40,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:40,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97150894] [2024-06-03 19:15:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:40,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:40,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 361 transitions, 4304 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) [2024-06-03 19:15:40,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:40,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:41,736 INFO L124 PetriNetUnfolderBase]: 3669/5485 cut-off events. [2024-06-03 19:15:41,736 INFO L125 PetriNetUnfolderBase]: For 871788/871788 co-relation queries the response was YES. [2024-06-03 19:15:41,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53380 conditions, 5485 events. 3669/5485 cut-off events. For 871788/871788 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27641 event pairs, 919 based on Foata normal form. 3/5485 useless extension candidates. Maximal degree in co-relation 53257. Up to 5214 conditions per place. [2024-06-03 19:15:41,801 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 329 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-03 19:15:41,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 385 transitions, 5304 flow [2024-06-03 19:15:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:15:41,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:15:41,802 INFO L175 Difference]: Start difference. First operand has 251 places, 361 transitions, 4304 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:15:41,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 385 transitions, 5304 flow [2024-06-03 19:15:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 385 transitions, 5242 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:15:42,871 INFO L231 Difference]: Finished difference. Result has 255 places, 367 transitions, 4392 flow [2024-06-03 19:15:42,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4392, PETRI_PLACES=255, PETRI_TRANSITIONS=367} [2024-06-03 19:15:42,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-03 19:15:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 367 transitions, 4392 flow [2024-06-03 19:15:42,872 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) [2024-06-03 19:15:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:42,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:15:42,872 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)] === [2024-06-03 19:15:42,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1507766948, now seen corresponding path program 2 times [2024-06-03 19:15:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:42,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666907594] [2024-06-03 19:15:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666907594] [2024-06-03 19:15:43,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666907594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:43,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:43,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:15:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030241133] [2024-06-03 19:15:43,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:15:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:15:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:15:43,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:43,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 367 transitions, 4392 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:43,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:43,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:44,995 INFO L124 PetriNetUnfolderBase]: 3684/5507 cut-off events. [2024-06-03 19:15:44,995 INFO L125 PetriNetUnfolderBase]: For 896176/896179 co-relation queries the response was YES. [2024-06-03 19:15:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 5507 events. 3684/5507 cut-off events. For 896176/896179 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27781 event pairs, 921 based on Foata normal form. 5/5508 useless extension candidates. Maximal degree in co-relation 54083. Up to 5228 conditions per place. [2024-06-03 19:15:45,065 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 324 selfloop transitions, 31 changer transitions 0/384 dead transitions. [2024-06-03 19:15:45,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 384 transitions, 5340 flow [2024-06-03 19:15:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:15:45,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-03 19:15:45,066 INFO L175 Difference]: Start difference. First operand has 255 places, 367 transitions, 4392 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:15:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 384 transitions, 5340 flow [2024-06-03 19:15:46,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 384 transitions, 5281 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:15:46,102 INFO L231 Difference]: Finished difference. Result has 259 places, 370 transitions, 4450 flow [2024-06-03 19:15:46,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4450, PETRI_PLACES=259, PETRI_TRANSITIONS=370} [2024-06-03 19:15:46,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-03 19:15:46,103 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 370 transitions, 4450 flow [2024-06-03 19:15:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:15:46,103 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)] === [2024-06-03 19:15:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929256, now seen corresponding path program 3 times [2024-06-03 19:15:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673550560] [2024-06-03 19:15:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673550560] [2024-06-03 19:15:46,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673550560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:46,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364472896] [2024-06-03 19:15:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:46,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-03 19:15:46,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 370 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:46,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:46,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-03 19:15:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:48,093 INFO L124 PetriNetUnfolderBase]: 3831/5653 cut-off events. [2024-06-03 19:15:48,093 INFO L125 PetriNetUnfolderBase]: For 910787/910790 co-relation queries the response was YES. [2024-06-03 19:15:48,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55334 conditions, 5653 events. 3831/5653 cut-off events. For 910787/910790 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27991 event pairs, 935 based on Foata normal form. 1/5650 useless extension candidates. Maximal degree in co-relation 55208. Up to 5588 conditions per place. [2024-06-03 19:15:48,168 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2024-06-03 19:15:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 5230 flow [2024-06-03 19:15:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:15:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:15:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:15:48,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-03 19:15:48,169 INFO L175 Difference]: Start difference. First operand has 259 places, 370 transitions, 4450 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:15:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 5230 flow [2024-06-03 19:15:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 379 transitions, 5125 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:15:49,413 INFO L231 Difference]: Finished difference. Result has 261 places, 370 transitions, 4405 flow [2024-06-03 19:15:49,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4405, PETRI_PLACES=261, PETRI_TRANSITIONS=370} [2024-06-03 19:15:49,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-03 19:15:49,413 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 370 transitions, 4405 flow [2024-06-03 19:15:49,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:49,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:49,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:49,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:15:49,414 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)] === [2024-06-03 19:15:49,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929504, now seen corresponding path program 3 times [2024-06-03 19:15:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751741996] [2024-06-03 19:15:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:50,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:50,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751741996] [2024-06-03 19:15:50,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751741996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:50,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:50,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:15:50,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906306696] [2024-06-03 19:15:50,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:50,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:15:50,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:15:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:15:50,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:15:50,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 370 transitions, 4405 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) [2024-06-03 19:15:50,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:50,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:15:50,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:51,555 INFO L124 PetriNetUnfolderBase]: 3672/5491 cut-off events. [2024-06-03 19:15:51,556 INFO L125 PetriNetUnfolderBase]: For 929143/929146 co-relation queries the response was YES. [2024-06-03 19:15:51,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54242 conditions, 5491 events. 3672/5491 cut-off events. For 929143/929146 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27776 event pairs, 919 based on Foata normal form. 5/5492 useless extension candidates. Maximal degree in co-relation 54115. Up to 5218 conditions per place. [2024-06-03 19:15:51,618 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 30 changer transitions 0/385 dead transitions. [2024-06-03 19:15:51,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 385 transitions, 5163 flow [2024-06-03 19:15:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:15:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:15:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:15:51,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-03 19:15:51,620 INFO L175 Difference]: Start difference. First operand has 261 places, 370 transitions, 4405 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:15:51,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 385 transitions, 5163 flow [2024-06-03 19:15:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 385 transitions, 5059 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:52,922 INFO L231 Difference]: Finished difference. Result has 262 places, 370 transitions, 4367 flow [2024-06-03 19:15:52,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4367, PETRI_PLACES=262, PETRI_TRANSITIONS=370} [2024-06-03 19:15:52,923 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-03 19:15:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 370 transitions, 4367 flow [2024-06-03 19:15:52,923 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) [2024-06-03 19:15:52,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:52,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:15:52,923 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:52,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash 930731572, now seen corresponding path program 1 times [2024-06-03 19:15:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712786483] [2024-06-03 19:15:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:54,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712786483] [2024-06-03 19:15:54,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712786483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:54,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:54,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:15:54,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142750704] [2024-06-03 19:15:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:54,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:15:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:54,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:15:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:15:54,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:54,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 370 transitions, 4367 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:54,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:54,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:54,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:55,665 INFO L124 PetriNetUnfolderBase]: 3638/5548 cut-off events. [2024-06-03 19:15:55,666 INFO L125 PetriNetUnfolderBase]: For 1049607/1049614 co-relation queries the response was YES. [2024-06-03 19:15:55,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56926 conditions, 5548 events. 3638/5548 cut-off events. For 1049607/1049614 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29810 event pairs, 494 based on Foata normal form. 16/5539 useless extension candidates. Maximal degree in co-relation 56798. Up to 3366 conditions per place. [2024-06-03 19:15:55,736 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 251 selfloop transitions, 143 changer transitions 0/424 dead transitions. [2024-06-03 19:15:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 424 transitions, 5727 flow [2024-06-03 19:15:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:15:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:15:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 19:15:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-03 19:15:55,737 INFO L175 Difference]: Start difference. First operand has 262 places, 370 transitions, 4367 flow. Second operand 10 states and 213 transitions. [2024-06-03 19:15:55,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 424 transitions, 5727 flow [2024-06-03 19:15:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 424 transitions, 5642 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:15:57,008 INFO L231 Difference]: Finished difference. Result has 264 places, 372 transitions, 4644 flow [2024-06-03 19:15:57,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4644, PETRI_PLACES=264, PETRI_TRANSITIONS=372} [2024-06-03 19:15:57,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-03 19:15:57,009 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 372 transitions, 4644 flow [2024-06-03 19:15:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:57,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:57,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:57,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:15:57,010 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:57,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash 988824022, now seen corresponding path program 2 times [2024-06-03 19:15:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260771362] [2024-06-03 19:15:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:57,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260771362] [2024-06-03 19:15:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260771362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:58,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:58,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:15:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935135248] [2024-06-03 19:15:58,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:58,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:15:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:15:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:15:58,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:15:58,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 372 transitions, 4644 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:58,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:58,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:15:58,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:59,798 INFO L124 PetriNetUnfolderBase]: 3851/5919 cut-off events. [2024-06-03 19:15:59,799 INFO L125 PetriNetUnfolderBase]: For 1143926/1143933 co-relation queries the response was YES. [2024-06-03 19:15:59,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62006 conditions, 5919 events. 3851/5919 cut-off events. For 1143926/1143933 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32635 event pairs, 727 based on Foata normal form. 16/5916 useless extension candidates. Maximal degree in co-relation 61877. Up to 4159 conditions per place. [2024-06-03 19:15:59,873 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 249 selfloop transitions, 153 changer transitions 0/432 dead transitions. [2024-06-03 19:15:59,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 6060 flow [2024-06-03 19:15:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:15:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:15:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 19:15:59,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-03 19:15:59,875 INFO L175 Difference]: Start difference. First operand has 264 places, 372 transitions, 4644 flow. Second operand 11 states and 236 transitions. [2024-06-03 19:15:59,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 6060 flow [2024-06-03 19:16:01,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 5877 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:01,296 INFO L231 Difference]: Finished difference. Result has 270 places, 375 transitions, 4887 flow [2024-06-03 19:16:01,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4887, PETRI_PLACES=270, PETRI_TRANSITIONS=375} [2024-06-03 19:16:01,297 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-03 19:16:01,297 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 375 transitions, 4887 flow [2024-06-03 19:16:01,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:01,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:01,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:16:01,297 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:01,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 988939342, now seen corresponding path program 3 times [2024-06-03 19:16:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:01,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220553577] [2024-06-03 19:16:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:02,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:02,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220553577] [2024-06-03 19:16:02,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220553577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:02,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:02,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:02,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44130295] [2024-06-03 19:16:02,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:02,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:02,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:02,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:02,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 375 transitions, 4887 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:02,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:02,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:02,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:04,053 INFO L124 PetriNetUnfolderBase]: 3909/6017 cut-off events. [2024-06-03 19:16:04,054 INFO L125 PetriNetUnfolderBase]: For 1180646/1180653 co-relation queries the response was YES. [2024-06-03 19:16:04,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63747 conditions, 6017 events. 3909/6017 cut-off events. For 1180646/1180653 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33419 event pairs, 743 based on Foata normal form. 16/6014 useless extension candidates. Maximal degree in co-relation 63615. Up to 4359 conditions per place. [2024-06-03 19:16:04,132 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 152 changer transitions 0/436 dead transitions. [2024-06-03 19:16:04,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 436 transitions, 6274 flow [2024-06-03 19:16:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:16:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:16:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-03 19:16:04,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2024-06-03 19:16:04,134 INFO L175 Difference]: Start difference. First operand has 270 places, 375 transitions, 4887 flow. Second operand 12 states and 251 transitions. [2024-06-03 19:16:04,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 436 transitions, 6274 flow [2024-06-03 19:16:05,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 436 transitions, 6049 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:05,534 INFO L231 Difference]: Finished difference. Result has 275 places, 376 transitions, 5012 flow [2024-06-03 19:16:05,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5012, PETRI_PLACES=275, PETRI_TRANSITIONS=376} [2024-06-03 19:16:05,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-03 19:16:05,535 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 376 transitions, 5012 flow [2024-06-03 19:16:05,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:05,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:05,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:16:05,536 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:05,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash 988943992, now seen corresponding path program 4 times [2024-06-03 19:16:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:05,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784678844] [2024-06-03 19:16:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784678844] [2024-06-03 19:16:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784678844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:06,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106569837] [2024-06-03 19:16:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:06,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:06,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 376 transitions, 5012 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:06,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:06,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:06,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:08,583 INFO L124 PetriNetUnfolderBase]: 3857/5937 cut-off events. [2024-06-03 19:16:08,584 INFO L125 PetriNetUnfolderBase]: For 1167673/1167680 co-relation queries the response was YES. [2024-06-03 19:16:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61966 conditions, 5937 events. 3857/5937 cut-off events. For 1167673/1167680 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 32840 event pairs, 741 based on Foata normal form. 28/5946 useless extension candidates. Maximal degree in co-relation 61832. Up to 4479 conditions per place. [2024-06-03 19:16:08,787 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 150 changer transitions 0/434 dead transitions. [2024-06-03 19:16:08,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 6076 flow [2024-06-03 19:16:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:16:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:16:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-03 19:16:08,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458041958041958 [2024-06-03 19:16:08,789 INFO L175 Difference]: Start difference. First operand has 275 places, 376 transitions, 5012 flow. Second operand 13 states and 262 transitions. [2024-06-03 19:16:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 6076 flow [2024-06-03 19:16:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 434 transitions, 5726 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-03 19:16:10,278 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4971 flow [2024-06-03 19:16:10,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4971, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-03 19:16:10,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-03 19:16:10,278 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4971 flow [2024-06-03 19:16:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:10,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:10,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:10,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:16:10,279 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)] === [2024-06-03 19:16:10,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash -95849523, now seen corresponding path program 1 times [2024-06-03 19:16:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628789931] [2024-06-03 19:16:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628789931] [2024-06-03 19:16:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628789931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:11,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:11,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:16:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805671224] [2024-06-03 19:16:11,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:16:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:16:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:16:11,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:16:11,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4971 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) [2024-06-03 19:16:11,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:11,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:16:11,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:12,455 INFO L124 PetriNetUnfolderBase]: 4179/6328 cut-off events. [2024-06-03 19:16:12,455 INFO L125 PetriNetUnfolderBase]: For 1151370/1151373 co-relation queries the response was YES. [2024-06-03 19:16:12,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64786 conditions, 6328 events. 4179/6328 cut-off events. For 1151370/1151373 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33842 event pairs, 1028 based on Foata normal form. 8/6325 useless extension candidates. Maximal degree in co-relation 64651. Up to 5766 conditions per place. [2024-06-03 19:16:12,526 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 128 changer transitions 0/417 dead transitions. [2024-06-03 19:16:12,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 417 transitions, 6545 flow [2024-06-03 19:16:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:16:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:16:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:16:12,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-03 19:16:12,527 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4971 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:16:12,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 417 transitions, 6545 flow [2024-06-03 19:16:13,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 417 transitions, 6237 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-03 19:16:13,881 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 5387 flow [2024-06-03 19:16:13,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5387, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-03 19:16:13,881 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-03 19:16:13,881 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 5387 flow [2024-06-03 19:16:13,882 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) [2024-06-03 19:16:13,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:13,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:13,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:16:13,882 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)] === [2024-06-03 19:16:13,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash -88230963, now seen corresponding path program 2 times [2024-06-03 19:16:13,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:13,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628106007] [2024-06-03 19:16:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:13,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:14,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628106007] [2024-06-03 19:16:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628106007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:14,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:16:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819420199] [2024-06-03 19:16:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:16:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:16:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:16:14,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:16:14,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 5387 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:16:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:16,085 INFO L124 PetriNetUnfolderBase]: 4167/6314 cut-off events. [2024-06-03 19:16:16,085 INFO L125 PetriNetUnfolderBase]: For 1156153/1156156 co-relation queries the response was YES. [2024-06-03 19:16:16,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64281 conditions, 6314 events. 4167/6314 cut-off events. For 1156153/1156156 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33829 event pairs, 1035 based on Foata normal form. 6/6309 useless extension candidates. Maximal degree in co-relation 64144. Up to 5871 conditions per place. [2024-06-03 19:16:16,162 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 298 selfloop transitions, 85 changer transitions 0/412 dead transitions. [2024-06-03 19:16:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 6544 flow [2024-06-03 19:16:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:16:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:16:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:16:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:16:16,164 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 5387 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:16:16,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 6544 flow [2024-06-03 19:16:17,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 412 transitions, 6276 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:16:17,856 INFO L231 Difference]: Finished difference. Result has 279 places, 398 transitions, 5362 flow [2024-06-03 19:16:17,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5362, PETRI_PLACES=279, PETRI_TRANSITIONS=398} [2024-06-03 19:16:17,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-03 19:16:17,856 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 398 transitions, 5362 flow [2024-06-03 19:16:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:17,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:17,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:16:17,857 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:17,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1019992358, now seen corresponding path program 5 times [2024-06-03 19:16:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245106079] [2024-06-03 19:16:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245106079] [2024-06-03 19:16:19,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245106079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:19,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:19,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:19,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136278204] [2024-06-03 19:16:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:19,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:19,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 398 transitions, 5362 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:19,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:19,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:19,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:20,825 INFO L124 PetriNetUnfolderBase]: 4004/6192 cut-off events. [2024-06-03 19:16:20,825 INFO L125 PetriNetUnfolderBase]: For 1235483/1235494 co-relation queries the response was YES. [2024-06-03 19:16:20,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64507 conditions, 6192 events. 4004/6192 cut-off events. For 1235483/1235494 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34814 event pairs, 643 based on Foata normal form. 18/6204 useless extension candidates. Maximal degree in co-relation 64368. Up to 4395 conditions per place. [2024-06-03 19:16:20,918 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 267 selfloop transitions, 149 changer transitions 0/452 dead transitions. [2024-06-03 19:16:20,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 452 transitions, 6766 flow [2024-06-03 19:16:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 19:16:20,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-03 19:16:20,920 INFO L175 Difference]: Start difference. First operand has 279 places, 398 transitions, 5362 flow. Second operand 10 states and 218 transitions. [2024-06-03 19:16:20,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 452 transitions, 6766 flow [2024-06-03 19:16:22,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 452 transitions, 6651 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:16:22,657 INFO L231 Difference]: Finished difference. Result has 285 places, 400 transitions, 5629 flow [2024-06-03 19:16:22,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5629, PETRI_PLACES=285, PETRI_TRANSITIONS=400} [2024-06-03 19:16:22,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-03 19:16:22,658 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 400 transitions, 5629 flow [2024-06-03 19:16:22,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:22,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:22,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:16:22,659 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:22,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1019877038, now seen corresponding path program 6 times [2024-06-03 19:16:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:22,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953366659] [2024-06-03 19:16:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:23,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953366659] [2024-06-03 19:16:23,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953366659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:23,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:23,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98551376] [2024-06-03 19:16:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:24,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 400 transitions, 5629 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:24,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:24,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:25,762 INFO L124 PetriNetUnfolderBase]: 4212/6538 cut-off events. [2024-06-03 19:16:25,762 INFO L125 PetriNetUnfolderBase]: For 1339903/1339910 co-relation queries the response was YES. [2024-06-03 19:16:25,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69248 conditions, 6538 events. 4212/6538 cut-off events. For 1339903/1339910 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37368 event pairs, 815 based on Foata normal form. 18/6552 useless extension candidates. Maximal degree in co-relation 69108. Up to 5019 conditions per place. [2024-06-03 19:16:25,850 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 276 selfloop transitions, 144 changer transitions 0/456 dead transitions. [2024-06-03 19:16:25,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 456 transitions, 7065 flow [2024-06-03 19:16:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 19:16:25,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-03 19:16:25,852 INFO L175 Difference]: Start difference. First operand has 285 places, 400 transitions, 5629 flow. Second operand 10 states and 218 transitions. [2024-06-03 19:16:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 456 transitions, 7065 flow [2024-06-03 19:16:27,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 456 transitions, 6833 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:27,754 INFO L231 Difference]: Finished difference. Result has 290 places, 404 transitions, 5797 flow [2024-06-03 19:16:27,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5797, PETRI_PLACES=290, PETRI_TRANSITIONS=404} [2024-06-03 19:16:27,754 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-03 19:16:27,755 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 404 transitions, 5797 flow [2024-06-03 19:16:27,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:27,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:27,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:16:27,755 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:27,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1019872388, now seen corresponding path program 7 times [2024-06-03 19:16:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:27,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027227875] [2024-06-03 19:16:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027227875] [2024-06-03 19:16:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027227875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294937658] [2024-06-03 19:16:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:29,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:29,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 404 transitions, 5797 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:29,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:29,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:29,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:30,821 INFO L124 PetriNetUnfolderBase]: 4176/6482 cut-off events. [2024-06-03 19:16:30,821 INFO L125 PetriNetUnfolderBase]: For 1321596/1321603 co-relation queries the response was YES. [2024-06-03 19:16:30,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67989 conditions, 6482 events. 4176/6482 cut-off events. For 1321596/1321603 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37019 event pairs, 817 based on Foata normal form. 22/6500 useless extension candidates. Maximal degree in co-relation 67846. Up to 5119 conditions per place. [2024-06-03 19:16:30,902 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 272 selfloop transitions, 142 changer transitions 0/450 dead transitions. [2024-06-03 19:16:30,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 6815 flow [2024-06-03 19:16:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:16:30,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:16:30,905 INFO L175 Difference]: Start difference. First operand has 290 places, 404 transitions, 5797 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:16:30,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 6815 flow [2024-06-03 19:16:33,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 450 transitions, 6592 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:16:33,279 INFO L231 Difference]: Finished difference. Result has 294 places, 404 transitions, 5865 flow [2024-06-03 19:16:33,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5865, PETRI_PLACES=294, PETRI_TRANSITIONS=404} [2024-06-03 19:16:33,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-03 19:16:33,279 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 404 transitions, 5865 flow [2024-06-03 19:16:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:33,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:33,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:33,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:16:33,280 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:33,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1488443870, now seen corresponding path program 8 times [2024-06-03 19:16:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192924041] [2024-06-03 19:16:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192924041] [2024-06-03 19:16:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192924041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:34,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:34,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:34,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926772036] [2024-06-03 19:16:34,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:34,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:34,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:34,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:34,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:34,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 404 transitions, 5865 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:34,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:34,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:36,294 INFO L124 PetriNetUnfolderBase]: 4229/6577 cut-off events. [2024-06-03 19:16:36,294 INFO L125 PetriNetUnfolderBase]: For 1339569/1339579 co-relation queries the response was YES. [2024-06-03 19:16:36,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68799 conditions, 6577 events. 4229/6577 cut-off events. For 1339569/1339579 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 37795 event pairs, 860 based on Foata normal form. 22/6593 useless extension candidates. Maximal degree in co-relation 68654. Up to 5448 conditions per place. [2024-06-03 19:16:36,394 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 294 selfloop transitions, 121 changer transitions 0/451 dead transitions. [2024-06-03 19:16:36,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 451 transitions, 7213 flow [2024-06-03 19:16:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:16:36,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:16:36,396 INFO L175 Difference]: Start difference. First operand has 294 places, 404 transitions, 5865 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:16:36,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 451 transitions, 7213 flow [2024-06-03 19:16:38,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 451 transitions, 6930 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 19:16:38,969 INFO L231 Difference]: Finished difference. Result has 296 places, 405 transitions, 5869 flow [2024-06-03 19:16:38,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5869, PETRI_PLACES=296, PETRI_TRANSITIONS=405} [2024-06-03 19:16:38,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-03 19:16:38,970 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 405 transitions, 5869 flow [2024-06-03 19:16:38,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:38,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:38,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:38,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:16:38,970 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:38,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1488448520, now seen corresponding path program 9 times [2024-06-03 19:16:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:38,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144776144] [2024-06-03 19:16:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144776144] [2024-06-03 19:16:40,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144776144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:40,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:40,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:40,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210000012] [2024-06-03 19:16:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:40,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:40,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:40,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 405 transitions, 5869 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:40,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:40,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:40,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:42,028 INFO L124 PetriNetUnfolderBase]: 4420/6896 cut-off events. [2024-06-03 19:16:42,028 INFO L125 PetriNetUnfolderBase]: For 1435599/1435606 co-relation queries the response was YES. [2024-06-03 19:16:42,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72752 conditions, 6896 events. 4420/6896 cut-off events. For 1435599/1435606 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40318 event pairs, 865 based on Foata normal form. 18/6910 useless extension candidates. Maximal degree in co-relation 72606. Up to 5487 conditions per place. [2024-06-03 19:16:42,135 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 124 changer transitions 0/458 dead transitions. [2024-06-03 19:16:42,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 458 transitions, 7595 flow [2024-06-03 19:16:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 19:16:42,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-03 19:16:42,137 INFO L175 Difference]: Start difference. First operand has 296 places, 405 transitions, 5869 flow. Second operand 10 states and 216 transitions. [2024-06-03 19:16:42,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 458 transitions, 7595 flow [2024-06-03 19:16:44,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 458 transitions, 7340 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:16:44,314 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 5946 flow [2024-06-03 19:16:44,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5946, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2024-06-03 19:16:44,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-03 19:16:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 5946 flow [2024-06-03 19:16:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:44,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:44,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:16:44,315 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:44,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1315781000, now seen corresponding path program 10 times [2024-06-03 19:16:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931243299] [2024-06-03 19:16:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931243299] [2024-06-03 19:16:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931243299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:45,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:45,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62752084] [2024-06-03 19:16:45,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:45,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:45,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 5946 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:45,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:45,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:47,277 INFO L124 PetriNetUnfolderBase]: 4478/6997 cut-off events. [2024-06-03 19:16:47,278 INFO L125 PetriNetUnfolderBase]: For 1469721/1469728 co-relation queries the response was YES. [2024-06-03 19:16:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73378 conditions, 6997 events. 4478/6997 cut-off events. For 1469721/1469728 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41063 event pairs, 965 based on Foata normal form. 20/7011 useless extension candidates. Maximal degree in co-relation 73231. Up to 5879 conditions per place. [2024-06-03 19:16:47,377 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 313 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2024-06-03 19:16:47,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 451 transitions, 7296 flow [2024-06-03 19:16:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 19:16:47,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-03 19:16:47,378 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 5946 flow. Second operand 10 states and 205 transitions. [2024-06-03 19:16:47,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 451 transitions, 7296 flow [2024-06-03 19:16:49,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 451 transitions, 7100 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:49,688 INFO L231 Difference]: Finished difference. Result has 301 places, 408 transitions, 6003 flow [2024-06-03 19:16:49,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6003, PETRI_PLACES=301, PETRI_TRANSITIONS=408} [2024-06-03 19:16:49,688 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-03 19:16:49,688 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 408 transitions, 6003 flow [2024-06-03 19:16:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:49,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:49,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:16:49,689 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:49,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1322214740, now seen corresponding path program 11 times [2024-06-03 19:16:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:49,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724740874] [2024-06-03 19:16:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:50,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724740874] [2024-06-03 19:16:50,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724740874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:50,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567986138] [2024-06-03 19:16:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:51,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:51,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 408 transitions, 6003 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:51,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:51,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:51,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:52,854 INFO L124 PetriNetUnfolderBase]: 4669/7316 cut-off events. [2024-06-03 19:16:52,854 INFO L125 PetriNetUnfolderBase]: For 1569407/1569410 co-relation queries the response was YES. [2024-06-03 19:16:52,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77696 conditions, 7316 events. 4669/7316 cut-off events. For 1569407/1569410 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43687 event pairs, 970 based on Foata normal form. 16/7328 useless extension candidates. Maximal degree in co-relation 77548. Up to 5853 conditions per place. [2024-06-03 19:16:52,960 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 311 selfloop transitions, 112 changer transitions 0/459 dead transitions. [2024-06-03 19:16:52,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 459 transitions, 7749 flow [2024-06-03 19:16:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:16:52,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:16:52,962 INFO L175 Difference]: Start difference. First operand has 301 places, 408 transitions, 6003 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:16:52,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 459 transitions, 7749 flow [2024-06-03 19:16:55,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 459 transitions, 7528 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:16:55,463 INFO L231 Difference]: Finished difference. Result has 303 places, 410 transitions, 6098 flow [2024-06-03 19:16:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6098, PETRI_PLACES=303, PETRI_TRANSITIONS=410} [2024-06-03 19:16:55,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-03 19:16:55,464 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 410 transitions, 6098 flow [2024-06-03 19:16:55,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:55,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:55,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:55,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:16:55,464 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:55,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1488270890, now seen corresponding path program 12 times [2024-06-03 19:16:55,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:55,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471409460] [2024-06-03 19:16:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:56,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471409460] [2024-06-03 19:16:56,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471409460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:56,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:56,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:16:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119253494] [2024-06-03 19:16:56,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:16:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:16:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:16:56,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:16:56,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 410 transitions, 6098 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:56,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:56,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:16:56,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:58,809 INFO L124 PetriNetUnfolderBase]: 4628/7254 cut-off events. [2024-06-03 19:16:58,809 INFO L125 PetriNetUnfolderBase]: For 1553664/1553671 co-relation queries the response was YES. [2024-06-03 19:16:58,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76115 conditions, 7254 events. 4628/7254 cut-off events. For 1553664/1553671 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43361 event pairs, 949 based on Foata normal form. 22/7272 useless extension candidates. Maximal degree in co-relation 75966. Up to 6138 conditions per place. [2024-06-03 19:16:58,907 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 303 selfloop transitions, 116 changer transitions 0/455 dead transitions. [2024-06-03 19:16:58,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 455 transitions, 7430 flow [2024-06-03 19:16:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 19:16:58,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-03 19:16:58,908 INFO L175 Difference]: Start difference. First operand has 303 places, 410 transitions, 6098 flow. Second operand 10 states and 209 transitions. [2024-06-03 19:16:58,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 455 transitions, 7430 flow [2024-06-03 19:17:01,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 7254 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:01,085 INFO L231 Difference]: Finished difference. Result has 307 places, 410 transitions, 6161 flow [2024-06-03 19:17:01,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6161, PETRI_PLACES=307, PETRI_TRANSITIONS=410} [2024-06-03 19:17:01,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-03 19:17:01,086 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 410 transitions, 6161 flow [2024-06-03 19:17:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:01,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:01,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:17:01,086 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:01,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1284084412, now seen corresponding path program 13 times [2024-06-03 19:17:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:01,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965460480] [2024-06-03 19:17:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:02,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965460480] [2024-06-03 19:17:02,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965460480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:02,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:02,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:17:02,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324005653] [2024-06-03 19:17:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:17:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:17:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:17:02,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:02,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 410 transitions, 6161 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:02,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:02,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:02,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:04,211 INFO L124 PetriNetUnfolderBase]: 4708/7385 cut-off events. [2024-06-03 19:17:04,211 INFO L125 PetriNetUnfolderBase]: For 1585455/1585458 co-relation queries the response was YES. [2024-06-03 19:17:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77344 conditions, 7385 events. 4708/7385 cut-off events. For 1585455/1585458 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 44326 event pairs, 968 based on Foata normal form. 20/7401 useless extension candidates. Maximal degree in co-relation 77193. Up to 6213 conditions per place. [2024-06-03 19:17:04,316 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 310 selfloop transitions, 109 changer transitions 0/455 dead transitions. [2024-06-03 19:17:04,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 455 transitions, 7533 flow [2024-06-03 19:17:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:17:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:17:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-03 19:17:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-03 19:17:04,318 INFO L175 Difference]: Start difference. First operand has 307 places, 410 transitions, 6161 flow. Second operand 10 states and 208 transitions. [2024-06-03 19:17:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 455 transitions, 7533 flow [2024-06-03 19:17:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 455 transitions, 7300 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:17:06,567 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 6193 flow [2024-06-03 19:17:06,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-03 19:17:06,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-03 19:17:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 6193 flow [2024-06-03 19:17:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:06,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:06,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:06,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:17:06,568 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:06,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -848996978, now seen corresponding path program 14 times [2024-06-03 19:17:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:06,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274204888] [2024-06-03 19:17:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:07,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:07,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274204888] [2024-06-03 19:17:07,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274204888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:07,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:07,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:17:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321479351] [2024-06-03 19:17:07,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:17:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:07,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:17:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:17:08,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:17:08,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 6193 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:08,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:08,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:17:08,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:09,742 INFO L124 PetriNetUnfolderBase]: 4672/7329 cut-off events. [2024-06-03 19:17:09,742 INFO L125 PetriNetUnfolderBase]: For 1553279/1553282 co-relation queries the response was YES. [2024-06-03 19:17:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75766 conditions, 7329 events. 4672/7329 cut-off events. For 1553279/1553282 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43944 event pairs, 960 based on Foata normal form. 20/7345 useless extension candidates. Maximal degree in co-relation 75614. Up to 6236 conditions per place. [2024-06-03 19:17:09,849 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 323 selfloop transitions, 94 changer transitions 0/453 dead transitions. [2024-06-03 19:17:09,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 7201 flow [2024-06-03 19:17:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:17:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:17:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 19:17:09,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-03 19:17:09,850 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 6193 flow. Second operand 10 states and 204 transitions. [2024-06-03 19:17:09,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 7201 flow [2024-06-03 19:17:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 453 transitions, 6958 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 19:17:12,673 INFO L231 Difference]: Finished difference. Result has 311 places, 411 transitions, 6145 flow [2024-06-03 19:17:12,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5950, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6145, PETRI_PLACES=311, PETRI_TRANSITIONS=411} [2024-06-03 19:17:12,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-03 19:17:12,674 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 411 transitions, 6145 flow [2024-06-03 19:17:12,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:12,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:12,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:12,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:17:12,674 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)] === [2024-06-03 19:17:12,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash -99662771, now seen corresponding path program 1 times [2024-06-03 19:17:12,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790483079] [2024-06-03 19:17:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790483079] [2024-06-03 19:17:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790483079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:13,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49126557] [2024-06-03 19:17:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:13,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:13,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 411 transitions, 6145 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) [2024-06-03 19:17:13,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:13,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:13,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:15,284 INFO L124 PetriNetUnfolderBase]: 5086/7834 cut-off events. [2024-06-03 19:17:15,285 INFO L125 PetriNetUnfolderBase]: For 1528031/1528038 co-relation queries the response was YES. [2024-06-03 19:17:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 7834 events. 5086/7834 cut-off events. For 1528031/1528038 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 45430 event pairs, 1324 based on Foata normal form. 6/7808 useless extension candidates. Maximal degree in co-relation 78788. Up to 7163 conditions per place. [2024-06-03 19:17:15,397 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 272 selfloop transitions, 145 changer transitions 0/447 dead transitions. [2024-06-03 19:17:15,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 7605 flow [2024-06-03 19:17:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:17:15,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:17:15,398 INFO L175 Difference]: Start difference. First operand has 311 places, 411 transitions, 6145 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:17:15,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 7605 flow [2024-06-03 19:17:18,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 447 transitions, 7402 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 19:17:18,204 INFO L231 Difference]: Finished difference. Result has 310 places, 419 transitions, 6399 flow [2024-06-03 19:17:18,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6399, PETRI_PLACES=310, PETRI_TRANSITIONS=419} [2024-06-03 19:17:18,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-03 19:17:18,205 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 419 transitions, 6399 flow [2024-06-03 19:17:18,205 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) [2024-06-03 19:17:18,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:18,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:17:18,206 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)] === [2024-06-03 19:17:18,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -99334078, now seen corresponding path program 1 times [2024-06-03 19:17:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:18,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087162989] [2024-06-03 19:17:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:19,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087162989] [2024-06-03 19:17:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087162989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:19,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461688945] [2024-06-03 19:17:19,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:19,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:19,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:19,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:19,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 419 transitions, 6399 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) [2024-06-03 19:17:19,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:19,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:19,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:20,813 INFO L124 PetriNetUnfolderBase]: 5227/8032 cut-off events. [2024-06-03 19:17:20,813 INFO L125 PetriNetUnfolderBase]: For 1632914/1632917 co-relation queries the response was YES. [2024-06-03 19:17:20,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82156 conditions, 8032 events. 5227/8032 cut-off events. For 1632914/1632917 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46650 event pairs, 1353 based on Foata normal form. 8/8008 useless extension candidates. Maximal degree in co-relation 82002. Up to 7357 conditions per place. [2024-06-03 19:17:20,941 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 327 selfloop transitions, 108 changer transitions 0/465 dead transitions. [2024-06-03 19:17:20,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 465 transitions, 7982 flow [2024-06-03 19:17:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:17:20,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-03 19:17:20,942 INFO L175 Difference]: Start difference. First operand has 310 places, 419 transitions, 6399 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:17:20,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 465 transitions, 7982 flow [2024-06-03 19:17:24,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7614 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 19:17:24,675 INFO L231 Difference]: Finished difference. Result has 316 places, 440 transitions, 6628 flow [2024-06-03 19:17:24,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=316, PETRI_TRANSITIONS=440} [2024-06-03 19:17:24,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-03 19:17:24,675 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 440 transitions, 6628 flow [2024-06-03 19:17:24,675 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) [2024-06-03 19:17:24,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:24,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:17:24,676 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)] === [2024-06-03 19:17:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -791869285, now seen corresponding path program 2 times [2024-06-03 19:17:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:24,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883187827] [2024-06-03 19:17:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:25,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883187827] [2024-06-03 19:17:25,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883187827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:25,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:25,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972799124] [2024-06-03 19:17:25,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:25,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:25,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:25,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 440 transitions, 6628 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) [2024-06-03 19:17:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:27,673 INFO L124 PetriNetUnfolderBase]: 5237/8043 cut-off events. [2024-06-03 19:17:27,673 INFO L125 PetriNetUnfolderBase]: For 1649362/1649369 co-relation queries the response was YES. [2024-06-03 19:17:27,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83400 conditions, 8043 events. 5237/8043 cut-off events. For 1649362/1649369 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46763 event pairs, 1330 based on Foata normal form. 6/8017 useless extension candidates. Maximal degree in co-relation 83243. Up to 7459 conditions per place. [2024-06-03 19:17:27,777 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 292 selfloop transitions, 143 changer transitions 0/465 dead transitions. [2024-06-03 19:17:27,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 465 transitions, 7816 flow [2024-06-03 19:17:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:17:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:17:27,779 INFO L175 Difference]: Start difference. First operand has 316 places, 440 transitions, 6628 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:17:27,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 465 transitions, 7816 flow [2024-06-03 19:17:30,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7710 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 19:17:30,147 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 6884 flow [2024-06-03 19:17:30,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6884, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-06-03 19:17:30,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-03 19:17:30,147 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 6884 flow [2024-06-03 19:17:30,148 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) [2024-06-03 19:17:30,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:30,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:30,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:17:30,148 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)] === [2024-06-03 19:17:30,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -88221508, now seen corresponding path program 2 times [2024-06-03 19:17:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578210697] [2024-06-03 19:17:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:31,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578210697] [2024-06-03 19:17:31,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578210697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:31,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:31,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976759902] [2024-06-03 19:17:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:31,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:31,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 6884 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) [2024-06-03 19:17:31,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:31,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:31,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:33,210 INFO L124 PetriNetUnfolderBase]: 5369/8228 cut-off events. [2024-06-03 19:17:33,210 INFO L125 PetriNetUnfolderBase]: For 1757575/1757578 co-relation queries the response was YES. [2024-06-03 19:17:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86452 conditions, 8228 events. 5369/8228 cut-off events. For 1757575/1757578 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 47880 event pairs, 1363 based on Foata normal form. 8/8204 useless extension candidates. Maximal degree in co-relation 86293. Up to 7466 conditions per place. [2024-06-03 19:17:33,328 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 347 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-03 19:17:33,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 479 transitions, 8641 flow [2024-06-03 19:17:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:17:33,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-03 19:17:33,329 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 6884 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:17:33,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 479 transitions, 8641 flow [2024-06-03 19:17:36,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 479 transitions, 8325 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:36,362 INFO L231 Difference]: Finished difference. Result has 325 places, 455 transitions, 6991 flow [2024-06-03 19:17:36,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=325, PETRI_TRANSITIONS=455} [2024-06-03 19:17:36,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-03 19:17:36,362 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 455 transitions, 6991 flow [2024-06-03 19:17:36,362 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) [2024-06-03 19:17:36,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:36,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:36,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:17:36,363 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)] === [2024-06-03 19:17:36,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash -88234931, now seen corresponding path program 3 times [2024-06-03 19:17:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963899103] [2024-06-03 19:17:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:36,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:37,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:37,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963899103] [2024-06-03 19:17:37,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963899103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:37,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:37,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145482032] [2024-06-03 19:17:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:37,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:37,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:37,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:37,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 455 transitions, 6991 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) [2024-06-03 19:17:37,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:37,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:37,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:39,479 INFO L124 PetriNetUnfolderBase]: 5381/8245 cut-off events. [2024-06-03 19:17:39,480 INFO L125 PetriNetUnfolderBase]: For 1771115/1771118 co-relation queries the response was YES. [2024-06-03 19:17:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87037 conditions, 8245 events. 5381/8245 cut-off events. For 1771115/1771118 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 48012 event pairs, 1377 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 86876. Up to 7786 conditions per place. [2024-06-03 19:17:39,600 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 354 selfloop transitions, 90 changer transitions 0/474 dead transitions. [2024-06-03 19:17:39,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 474 transitions, 8375 flow [2024-06-03 19:17:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:17:39,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:17:39,602 INFO L175 Difference]: Start difference. First operand has 325 places, 455 transitions, 6991 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:17:39,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 474 transitions, 8375 flow [2024-06-03 19:17:42,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 8152 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:17:42,673 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 7028 flow [2024-06-03 19:17:42,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-03 19:17:42,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-03 19:17:42,680 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 7028 flow [2024-06-03 19:17:42,680 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) [2024-06-03 19:17:42,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:42,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:17:42,680 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)] === [2024-06-03 19:17:42,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -588719806, now seen corresponding path program 3 times [2024-06-03 19:17:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120179814] [2024-06-03 19:17:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:43,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120179814] [2024-06-03 19:17:43,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120179814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:43,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:43,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:17:43,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754219569] [2024-06-03 19:17:43,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:43,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:17:43,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:17:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:17:43,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:43,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 7028 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) [2024-06-03 19:17:43,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:43,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:45,608 INFO L124 PetriNetUnfolderBase]: 5369/8230 cut-off events. [2024-06-03 19:17:45,608 INFO L125 PetriNetUnfolderBase]: For 1793120/1793123 co-relation queries the response was YES. [2024-06-03 19:17:45,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 8230 events. 5369/8230 cut-off events. For 1793120/1793123 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47861 event pairs, 1367 based on Foata normal form. 8/8206 useless extension candidates. Maximal degree in co-relation 86015. Up to 7479 conditions per place. [2024-06-03 19:17:45,734 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 352 selfloop transitions, 102 changer transitions 0/484 dead transitions. [2024-06-03 19:17:45,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 484 transitions, 8438 flow [2024-06-03 19:17:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:17:45,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-03 19:17:45,736 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 7028 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:17:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 484 transitions, 8438 flow [2024-06-03 19:17:48,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 484 transitions, 8276 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:17:48,581 INFO L231 Difference]: Finished difference. Result has 333 places, 460 transitions, 7109 flow [2024-06-03 19:17:48,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7109, PETRI_PLACES=333, PETRI_TRANSITIONS=460} [2024-06-03 19:17:48,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-03 19:17:48,581 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 460 transitions, 7109 flow [2024-06-03 19:17:48,581 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) [2024-06-03 19:17:48,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:48,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:48,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:17:48,582 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)] === [2024-06-03 19:17:48,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -260407327, now seen corresponding path program 3 times [2024-06-03 19:17:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365494960] [2024-06-03 19:17:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:49,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365494960] [2024-06-03 19:17:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365494960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:49,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:49,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:17:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042011411] [2024-06-03 19:17:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:17:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:17:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:17:49,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:49,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 460 transitions, 7109 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) [2024-06-03 19:17:49,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:49,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:49,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:51,304 INFO L124 PetriNetUnfolderBase]: 5351/8202 cut-off events. [2024-06-03 19:17:51,305 INFO L125 PetriNetUnfolderBase]: For 1796578/1796578 co-relation queries the response was YES. [2024-06-03 19:17:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86256 conditions, 8202 events. 5351/8202 cut-off events. For 1796578/1796578 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47693 event pairs, 1387 based on Foata normal form. 2/8173 useless extension candidates. Maximal degree in co-relation 86093. Up to 7942 conditions per place. [2024-06-03 19:17:51,434 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 416 selfloop transitions, 30 changer transitions 0/476 dead transitions. [2024-06-03 19:17:51,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8259 flow [2024-06-03 19:17:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:17:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:17:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:17:51,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:17:51,436 INFO L175 Difference]: Start difference. First operand has 333 places, 460 transitions, 7109 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:17:51,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8259 flow [2024-06-03 19:17:54,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 476 transitions, 8039 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:17:54,931 INFO L231 Difference]: Finished difference. Result has 334 places, 460 transitions, 6958 flow [2024-06-03 19:17:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6958, PETRI_PLACES=334, PETRI_TRANSITIONS=460} [2024-06-03 19:17:54,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-03 19:17:54,932 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 460 transitions, 6958 flow [2024-06-03 19:17:54,932 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) [2024-06-03 19:17:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:54,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:17:54,933 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)] === [2024-06-03 19:17:54,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2011992837, now seen corresponding path program 4 times [2024-06-03 19:17:54,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:54,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926719140] [2024-06-03 19:17:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926719140] [2024-06-03 19:17:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926719140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:55,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:55,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:17:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742956445] [2024-06-03 19:17:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:17:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:17:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:17:55,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:17:55,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 460 transitions, 6958 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) [2024-06-03 19:17:55,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:55,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:17:55,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:57,591 INFO L124 PetriNetUnfolderBase]: 5356/8209 cut-off events. [2024-06-03 19:17:57,592 INFO L125 PetriNetUnfolderBase]: For 1823833/1823833 co-relation queries the response was YES. [2024-06-03 19:17:57,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86218 conditions, 8209 events. 5356/8209 cut-off events. For 1823833/1823833 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47781 event pairs, 1379 based on Foata normal form. 1/8179 useless extension candidates. Maximal degree in co-relation 86054. Up to 7969 conditions per place. [2024-06-03 19:17:57,714 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 424 selfloop transitions, 21 changer transitions 0/475 dead transitions. [2024-06-03 19:17:57,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 475 transitions, 7964 flow [2024-06-03 19:17:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:17:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:17:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:17:57,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-03 19:17:57,715 INFO L175 Difference]: Start difference. First operand has 334 places, 460 transitions, 6958 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:17:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 475 transitions, 7964 flow [2024-06-03 19:18:01,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 475 transitions, 7737 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:01,144 INFO L231 Difference]: Finished difference. Result has 336 places, 463 transitions, 6859 flow [2024-06-03 19:18:01,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6859, PETRI_PLACES=336, PETRI_TRANSITIONS=463} [2024-06-03 19:18:01,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-03 19:18:01,145 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 463 transitions, 6859 flow [2024-06-03 19:18:01,145 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) [2024-06-03 19:18:01,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:01,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:18:01,146 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)] === [2024-06-03 19:18:01,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 494653487, now seen corresponding path program 5 times [2024-06-03 19:18:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180984102] [2024-06-03 19:18:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:01,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180984102] [2024-06-03 19:18:01,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180984102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:01,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:01,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350350761] [2024-06-03 19:18:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:01,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:01,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 463 transitions, 6859 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) [2024-06-03 19:18:01,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:01,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:01,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:03,728 INFO L124 PetriNetUnfolderBase]: 5353/8206 cut-off events. [2024-06-03 19:18:03,729 INFO L125 PetriNetUnfolderBase]: For 1849480/1849483 co-relation queries the response was YES. [2024-06-03 19:18:03,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86149 conditions, 8206 events. 5353/8206 cut-off events. For 1849480/1849483 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47760 event pairs, 1389 based on Foata normal form. 3/8177 useless extension candidates. Maximal degree in co-relation 85985. Up to 7965 conditions per place. [2024-06-03 19:18:03,858 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 421 selfloop transitions, 21 changer transitions 0/472 dead transitions. [2024-06-03 19:18:03,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 472 transitions, 7771 flow [2024-06-03 19:18:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:18:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:18:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:18:03,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-03 19:18:03,860 INFO L175 Difference]: Start difference. First operand has 336 places, 463 transitions, 6859 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:18:03,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 472 transitions, 7771 flow [2024-06-03 19:18:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7697 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:08,264 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6833 flow [2024-06-03 19:18:08,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6833, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-03 19:18:08,264 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-03 19:18:08,264 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6833 flow [2024-06-03 19:18:08,265 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) [2024-06-03 19:18:08,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:08,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:08,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:18:08,265 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)] === [2024-06-03 19:18:08,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1774179861, now seen corresponding path program 6 times [2024-06-03 19:18:08,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:08,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406064662] [2024-06-03 19:18:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406064662] [2024-06-03 19:18:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406064662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:09,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:18:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700437127] [2024-06-03 19:18:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:18:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:18:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:18:09,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:09,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6833 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) [2024-06-03 19:18:09,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:09,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:09,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:10,919 INFO L124 PetriNetUnfolderBase]: 5345/8195 cut-off events. [2024-06-03 19:18:10,919 INFO L125 PetriNetUnfolderBase]: For 1877711/1877714 co-relation queries the response was YES. [2024-06-03 19:18:11,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86143 conditions, 8195 events. 5345/8195 cut-off events. For 1877711/1877714 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 47685 event pairs, 1389 based on Foata normal form. 4/8167 useless extension candidates. Maximal degree in co-relation 85978. Up to 7932 conditions per place. [2024-06-03 19:18:11,054 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 30 changer transitions 0/472 dead transitions. [2024-06-03 19:18:11,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 472 transitions, 7745 flow [2024-06-03 19:18:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:18:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:18:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:18:11,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:18:11,056 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6833 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:18:11,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 472 transitions, 7745 flow [2024-06-03 19:18:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7669 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:14,835 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6825 flow [2024-06-03 19:18:14,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6825, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-03 19:18:14,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-03 19:18:14,836 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6825 flow [2024-06-03 19:18:14,836 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) [2024-06-03 19:18:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:18:14,837 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:14,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1161228368, now seen corresponding path program 1 times [2024-06-03 19:18:14,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:14,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485363865] [2024-06-03 19:18:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:15,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485363865] [2024-06-03 19:18:15,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485363865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:15,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:15,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:15,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963416349] [2024-06-03 19:18:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:15,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:16,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:16,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6825 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:16,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:16,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:16,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:18,043 INFO L124 PetriNetUnfolderBase]: 5420/8298 cut-off events. [2024-06-03 19:18:18,044 INFO L125 PetriNetUnfolderBase]: For 1943580/1943583 co-relation queries the response was YES. [2024-06-03 19:18:18,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87547 conditions, 8298 events. 5420/8298 cut-off events. For 1943580/1943583 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 48276 event pairs, 1311 based on Foata normal form. 4/8287 useless extension candidates. Maximal degree in co-relation 87381. Up to 7913 conditions per place. [2024-06-03 19:18:18,175 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 430 selfloop transitions, 33 changer transitions 0/502 dead transitions. [2024-06-03 19:18:18,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 7977 flow [2024-06-03 19:18:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-03 19:18:18,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:18:18,177 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6825 flow. Second operand 10 states and 180 transitions. [2024-06-03 19:18:18,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 7977 flow [2024-06-03 19:18:21,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 502 transitions, 7907 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:18:21,708 INFO L231 Difference]: Finished difference. Result has 343 places, 468 transitions, 6932 flow [2024-06-03 19:18:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6932, PETRI_PLACES=343, PETRI_TRANSITIONS=468} [2024-06-03 19:18:21,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-03 19:18:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 468 transitions, 6932 flow [2024-06-03 19:18:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:21,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:21,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:18:21,710 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)] === [2024-06-03 19:18:21,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1749991166, now seen corresponding path program 4 times [2024-06-03 19:18:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076080417] [2024-06-03 19:18:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:22,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:22,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076080417] [2024-06-03 19:18:22,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076080417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:22,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:18:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412549168] [2024-06-03 19:18:22,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:22,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:18:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:18:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:18:22,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:22,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 468 transitions, 6932 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) [2024-06-03 19:18:22,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:22,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:22,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:24,670 INFO L124 PetriNetUnfolderBase]: 5653/8627 cut-off events. [2024-06-03 19:18:24,670 INFO L125 PetriNetUnfolderBase]: For 2079676/2079679 co-relation queries the response was YES. [2024-06-03 19:18:24,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92153 conditions, 8627 events. 5653/8627 cut-off events. For 2079676/2079679 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50410 event pairs, 1323 based on Foata normal form. 8/8603 useless extension candidates. Maximal degree in co-relation 91985. Up to 7677 conditions per place. [2024-06-03 19:18:24,820 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 378 selfloop transitions, 147 changer transitions 0/555 dead transitions. [2024-06-03 19:18:24,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 555 transitions, 9493 flow [2024-06-03 19:18:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:18:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:18:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:18:24,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:18:24,822 INFO L175 Difference]: Start difference. First operand has 343 places, 468 transitions, 6932 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:18:24,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 555 transitions, 9493 flow [2024-06-03 19:18:29,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 555 transitions, 9370 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:29,332 INFO L231 Difference]: Finished difference. Result has 349 places, 512 transitions, 7944 flow [2024-06-03 19:18:29,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7944, PETRI_PLACES=349, PETRI_TRANSITIONS=512} [2024-06-03 19:18:29,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-03 19:18:29,332 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 512 transitions, 7944 flow [2024-06-03 19:18:29,332 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) [2024-06-03 19:18:29,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:18:29,333 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:29,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1161474632, now seen corresponding path program 15 times [2024-06-03 19:18:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:29,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223922124] [2024-06-03 19:18:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:30,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:30,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223922124] [2024-06-03 19:18:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223922124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:30,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488530626] [2024-06-03 19:18:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:30,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:30,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:18:30,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 512 transitions, 7944 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:30,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:30,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:18:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:32,901 INFO L124 PetriNetUnfolderBase]: 5333/8274 cut-off events. [2024-06-03 19:18:32,901 INFO L125 PetriNetUnfolderBase]: For 2204044/2204052 co-relation queries the response was YES. [2024-06-03 19:18:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92941 conditions, 8274 events. 5333/8274 cut-off events. For 2204044/2204052 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50250 event pairs, 1199 based on Foata normal form. 22/8265 useless extension candidates. Maximal degree in co-relation 92768. Up to 7520 conditions per place. [2024-06-03 19:18:33,042 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 463 selfloop transitions, 49 changer transitions 0/554 dead transitions. [2024-06-03 19:18:33,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 554 transitions, 9534 flow [2024-06-03 19:18:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:18:33,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:18:33,044 INFO L175 Difference]: Start difference. First operand has 349 places, 512 transitions, 7944 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:18:33,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 554 transitions, 9534 flow [2024-06-03 19:18:36,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 554 transitions, 9397 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-03 19:18:36,841 INFO L231 Difference]: Finished difference. Result has 357 places, 513 transitions, 7958 flow [2024-06-03 19:18:36,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7958, PETRI_PLACES=357, PETRI_TRANSITIONS=513} [2024-06-03 19:18:36,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-03 19:18:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 513 transitions, 7958 flow [2024-06-03 19:18:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:36,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:36,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:18:36,842 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)] === [2024-06-03 19:18:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1042314047, now seen corresponding path program 1 times [2024-06-03 19:18:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:36,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345754122] [2024-06-03 19:18:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345754122] [2024-06-03 19:18:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345754122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:37,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:18:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219076931] [2024-06-03 19:18:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:18:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:18:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:18:37,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:37,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 513 transitions, 7958 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-03 19:18:37,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:37,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:37,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:40,120 INFO L124 PetriNetUnfolderBase]: 5775/8821 cut-off events. [2024-06-03 19:18:40,121 INFO L125 PetriNetUnfolderBase]: For 2169953/2169956 co-relation queries the response was YES. [2024-06-03 19:18:40,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 8821 events. 5775/8821 cut-off events. For 2169953/2169956 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51927 event pairs, 1385 based on Foata normal form. 8/8788 useless extension candidates. Maximal degree in co-relation 95756. Up to 7951 conditions per place. [2024-06-03 19:18:40,273 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 401 selfloop transitions, 135 changer transitions 0/566 dead transitions. [2024-06-03 19:18:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 566 transitions, 10166 flow [2024-06-03 19:18:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:18:40,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-03 19:18:40,275 INFO L175 Difference]: Start difference. First operand has 357 places, 513 transitions, 7958 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:18:40,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 566 transitions, 10166 flow [2024-06-03 19:18:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 566 transitions, 10047 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:18:45,173 INFO L231 Difference]: Finished difference. Result has 361 places, 526 transitions, 8369 flow [2024-06-03 19:18:45,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7839, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8369, PETRI_PLACES=361, PETRI_TRANSITIONS=526} [2024-06-03 19:18:45,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-03 19:18:45,174 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 526 transitions, 8369 flow [2024-06-03 19:18:45,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-03 19:18:45,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:45,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:45,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:18:45,174 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:45,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1130901422, now seen corresponding path program 2 times [2024-06-03 19:18:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859039945] [2024-06-03 19:18:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:45,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:46,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:46,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859039945] [2024-06-03 19:18:46,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859039945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:46,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:46,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:46,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562718594] [2024-06-03 19:18:46,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:46,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:46,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:46,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:46,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 526 transitions, 8369 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:46,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:46,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:46,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:48,877 INFO L124 PetriNetUnfolderBase]: 5855/8927 cut-off events. [2024-06-03 19:18:48,877 INFO L125 PetriNetUnfolderBase]: For 2218696/2218701 co-relation queries the response was YES. [2024-06-03 19:18:48,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98200 conditions, 8927 events. 5855/8927 cut-off events. For 2218696/2218701 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52489 event pairs, 1434 based on Foata normal form. 4/8901 useless extension candidates. Maximal degree in co-relation 98022. Up to 8492 conditions per place. [2024-06-03 19:18:49,004 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 482 selfloop transitions, 45 changer transitions 0/566 dead transitions. [2024-06-03 19:18:49,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 566 transitions, 9675 flow [2024-06-03 19:18:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:18:49,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-03 19:18:49,006 INFO L175 Difference]: Start difference. First operand has 361 places, 526 transitions, 8369 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:18:49,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 566 transitions, 9675 flow [2024-06-03 19:18:52,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 566 transitions, 9497 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:18:52,758 INFO L231 Difference]: Finished difference. Result has 369 places, 531 transitions, 8401 flow [2024-06-03 19:18:52,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8401, PETRI_PLACES=369, PETRI_TRANSITIONS=531} [2024-06-03 19:18:52,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-03 19:18:52,763 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 531 transitions, 8401 flow [2024-06-03 19:18:52,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:52,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:52,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:52,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:18:52,764 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)] === [2024-06-03 19:18:52,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1473607715, now seen corresponding path program 2 times [2024-06-03 19:18:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:52,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825209165] [2024-06-03 19:18:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:53,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:53,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825209165] [2024-06-03 19:18:53,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825209165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:53,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:53,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:18:53,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066361859] [2024-06-03 19:18:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:53,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:18:53,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:53,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:18:53,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:18:53,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:18:53,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 531 transitions, 8401 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-03 19:18:53,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:53,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:18:53,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:56,234 INFO L124 PetriNetUnfolderBase]: 5822/8890 cut-off events. [2024-06-03 19:18:56,234 INFO L125 PetriNetUnfolderBase]: For 2251786/2251789 co-relation queries the response was YES. [2024-06-03 19:18:56,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98108 conditions, 8890 events. 5822/8890 cut-off events. For 2251786/2251789 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52325 event pairs, 1364 based on Foata normal form. 8/8857 useless extension candidates. Maximal degree in co-relation 97927. Up to 8000 conditions per place. [2024-06-03 19:18:56,382 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 409 selfloop transitions, 138 changer transitions 0/577 dead transitions. [2024-06-03 19:18:56,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10580 flow [2024-06-03 19:18:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-03 19:18:56,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-03 19:18:56,384 INFO L175 Difference]: Start difference. First operand has 369 places, 531 transitions, 8401 flow. Second operand 10 states and 185 transitions. [2024-06-03 19:18:56,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10580 flow [2024-06-03 19:19:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 577 transitions, 10425 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:00,347 INFO L231 Difference]: Finished difference. Result has 372 places, 535 transitions, 8606 flow [2024-06-03 19:19:00,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8606, PETRI_PLACES=372, PETRI_TRANSITIONS=535} [2024-06-03 19:19:00,348 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-03 19:19:00,348 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 535 transitions, 8606 flow [2024-06-03 19:19:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-03 19:19:00,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:00,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:00,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:19:00,349 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:00,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2094944832, now seen corresponding path program 3 times [2024-06-03 19:19:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:00,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708893256] [2024-06-03 19:19:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708893256] [2024-06-03 19:19:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708893256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:01,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:19:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488972708] [2024-06-03 19:19:01,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:01,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:19:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:19:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:19:01,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:19:01,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 535 transitions, 8606 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:01,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:01,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:19:01,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:04,028 INFO L124 PetriNetUnfolderBase]: 5892/8984 cut-off events. [2024-06-03 19:19:04,028 INFO L125 PetriNetUnfolderBase]: For 2293492/2293497 co-relation queries the response was YES. [2024-06-03 19:19:04,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99687 conditions, 8984 events. 5892/8984 cut-off events. For 2293492/2293497 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52862 event pairs, 1440 based on Foata normal form. 4/8958 useless extension candidates. Maximal degree in co-relation 99505. Up to 8662 conditions per place. [2024-06-03 19:19:04,180 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 507 selfloop transitions, 23 changer transitions 0/569 dead transitions. [2024-06-03 19:19:04,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 569 transitions, 9866 flow [2024-06-03 19:19:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:19:04,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:19:04,181 INFO L175 Difference]: Start difference. First operand has 372 places, 535 transitions, 8606 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:19:04,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 569 transitions, 9866 flow [2024-06-03 19:19:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 569 transitions, 9672 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:08,292 INFO L231 Difference]: Finished difference. Result has 377 places, 537 transitions, 8545 flow [2024-06-03 19:19:08,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=377, PETRI_TRANSITIONS=537} [2024-06-03 19:19:08,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-03 19:19:08,292 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 537 transitions, 8545 flow [2024-06-03 19:19:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:08,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:08,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:08,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:19:08,293 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1379755244, now seen corresponding path program 16 times [2024-06-03 19:19:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:08,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36686479] [2024-06-03 19:19:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:08,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:09,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:09,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36686479] [2024-06-03 19:19:09,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36686479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:09,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023113571] [2024-06-03 19:19:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:09,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:19:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 537 transitions, 8545 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:09,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:19:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:12,130 INFO L124 PetriNetUnfolderBase]: 5542/8595 cut-off events. [2024-06-03 19:19:12,130 INFO L125 PetriNetUnfolderBase]: For 2403803/2403811 co-relation queries the response was YES. [2024-06-03 19:19:12,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97206 conditions, 8595 events. 5542/8595 cut-off events. For 2403803/2403811 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52584 event pairs, 1245 based on Foata normal form. 22/8581 useless extension candidates. Maximal degree in co-relation 97023. Up to 7870 conditions per place. [2024-06-03 19:19:12,284 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 490 selfloop transitions, 44 changer transitions 0/577 dead transitions. [2024-06-03 19:19:12,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 577 transitions, 9825 flow [2024-06-03 19:19:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:19:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-03 19:19:12,285 INFO L175 Difference]: Start difference. First operand has 377 places, 537 transitions, 8545 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:19:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 577 transitions, 9825 flow [2024-06-03 19:19:16,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 577 transitions, 9714 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:17,003 INFO L231 Difference]: Finished difference. Result has 380 places, 538 transitions, 8577 flow [2024-06-03 19:19:17,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8577, PETRI_PLACES=380, PETRI_TRANSITIONS=538} [2024-06-03 19:19:17,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-03 19:19:17,003 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 538 transitions, 8577 flow [2024-06-03 19:19:17,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:17,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:17,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:17,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:19:17,004 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:17,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1167903722, now seen corresponding path program 17 times [2024-06-03 19:19:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272806700] [2024-06-03 19:19:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:18,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:18,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272806700] [2024-06-03 19:19:18,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272806700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:18,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:18,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119865975] [2024-06-03 19:19:18,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:18,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:19:18,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 538 transitions, 8577 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:18,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:18,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:19:18,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:20,678 INFO L124 PetriNetUnfolderBase]: 5650/8789 cut-off events. [2024-06-03 19:19:20,679 INFO L125 PetriNetUnfolderBase]: For 2507588/2507596 co-relation queries the response was YES. [2024-06-03 19:19:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98592 conditions, 8789 events. 5650/8789 cut-off events. For 2507588/2507596 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54151 event pairs, 1263 based on Foata normal form. 38/8791 useless extension candidates. Maximal degree in co-relation 98408. Up to 7760 conditions per place. [2024-06-03 19:19:20,831 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 484 selfloop transitions, 58 changer transitions 0/585 dead transitions. [2024-06-03 19:19:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 9959 flow [2024-06-03 19:19:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:19:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:19:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:19:20,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:19:20,833 INFO L175 Difference]: Start difference. First operand has 380 places, 538 transitions, 8577 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:19:20,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 9959 flow [2024-06-03 19:19:25,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 585 transitions, 9848 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:25,541 INFO L231 Difference]: Finished difference. Result has 383 places, 540 transitions, 8692 flow [2024-06-03 19:19:25,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8692, PETRI_PLACES=383, PETRI_TRANSITIONS=540} [2024-06-03 19:19:25,542 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-03 19:19:25,542 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 540 transitions, 8692 flow [2024-06-03 19:19:25,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:25,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:25,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:25,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:19:25,543 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:25,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1167908372, now seen corresponding path program 18 times [2024-06-03 19:19:25,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:25,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279731771] [2024-06-03 19:19:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:25,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:26,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279731771] [2024-06-03 19:19:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279731771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:26,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908421161] [2024-06-03 19:19:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:26,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:19:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 540 transitions, 8692 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:19:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:29,735 INFO L124 PetriNetUnfolderBase]: 5794/9029 cut-off events. [2024-06-03 19:19:29,736 INFO L125 PetriNetUnfolderBase]: For 2538983/2538991 co-relation queries the response was YES. [2024-06-03 19:19:29,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102003 conditions, 9029 events. 5794/9029 cut-off events. For 2538983/2538991 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56041 event pairs, 1273 based on Foata normal form. 18/9011 useless extension candidates. Maximal degree in co-relation 101818. Up to 7481 conditions per place. [2024-06-03 19:19:29,871 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 473 selfloop transitions, 72 changer transitions 0/588 dead transitions. [2024-06-03 19:19:29,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 588 transitions, 10808 flow [2024-06-03 19:19:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 19:19:29,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-03 19:19:29,872 INFO L175 Difference]: Start difference. First operand has 383 places, 540 transitions, 8692 flow. Second operand 10 states and 202 transitions. [2024-06-03 19:19:29,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 588 transitions, 10808 flow [2024-06-03 19:19:34,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 588 transitions, 10595 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-03 19:19:34,591 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 8743 flow [2024-06-03 19:19:34,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8743, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-03 19:19:34,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-03 19:19:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 8743 flow [2024-06-03 19:19:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:19:34,592 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:34,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1799647150, now seen corresponding path program 4 times [2024-06-03 19:19:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053119096] [2024-06-03 19:19:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:35,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053119096] [2024-06-03 19:19:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053119096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:35,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:35,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832381745] [2024-06-03 19:19:35,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:35,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:35,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:19:35,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 8743 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:35,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:35,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:19:35,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:38,801 INFO L124 PetriNetUnfolderBase]: 6264/9604 cut-off events. [2024-06-03 19:19:38,801 INFO L125 PetriNetUnfolderBase]: For 2466634/2466639 co-relation queries the response was YES. [2024-06-03 19:19:38,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105141 conditions, 9604 events. 6264/9604 cut-off events. For 2466634/2466639 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57793 event pairs, 1570 based on Foata normal form. 4/9578 useless extension candidates. Maximal degree in co-relation 104954. Up to 9255 conditions per place. [2024-06-03 19:19:38,944 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 513 selfloop transitions, 28 changer transitions 0/580 dead transitions. [2024-06-03 19:19:38,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 580 transitions, 10076 flow [2024-06-03 19:19:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-03 19:19:38,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-03 19:19:38,946 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 8743 flow. Second operand 10 states and 178 transitions. [2024-06-03 19:19:38,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 580 transitions, 10076 flow [2024-06-03 19:19:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 9633 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-03 19:19:43,325 INFO L231 Difference]: Finished difference. Result has 386 places, 547 transitions, 8500 flow [2024-06-03 19:19:43,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8500, PETRI_PLACES=386, PETRI_TRANSITIONS=547} [2024-06-03 19:19:43,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-03 19:19:43,326 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 547 transitions, 8500 flow [2024-06-03 19:19:43,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:43,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:43,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:19:43,327 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:43,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1416736950, now seen corresponding path program 19 times [2024-06-03 19:19:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630053446] [2024-06-03 19:19:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:44,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:44,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630053446] [2024-06-03 19:19:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630053446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:44,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:44,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261021131] [2024-06-03 19:19:44,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:19:44,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 547 transitions, 8500 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:44,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:44,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:19:44,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:47,298 INFO L124 PetriNetUnfolderBase]: 5682/8874 cut-off events. [2024-06-03 19:19:47,298 INFO L125 PetriNetUnfolderBase]: For 2460804/2460812 co-relation queries the response was YES. [2024-06-03 19:19:47,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95365 conditions, 8874 events. 5682/8874 cut-off events. For 2460804/2460812 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 55097 event pairs, 1246 based on Foata normal form. 38/8876 useless extension candidates. Maximal degree in co-relation 95179. Up to 8061 conditions per place. [2024-06-03 19:19:47,459 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 500 selfloop transitions, 43 changer transitions 0/587 dead transitions. [2024-06-03 19:19:47,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 587 transitions, 10132 flow [2024-06-03 19:19:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:19:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:19:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:19:47,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-03 19:19:47,461 INFO L175 Difference]: Start difference. First operand has 386 places, 547 transitions, 8500 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:19:47,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 587 transitions, 10132 flow [2024-06-03 19:19:52,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 587 transitions, 9969 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:52,748 INFO L231 Difference]: Finished difference. Result has 389 places, 547 transitions, 8433 flow [2024-06-03 19:19:52,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8433, PETRI_PLACES=389, PETRI_TRANSITIONS=547} [2024-06-03 19:19:52,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-03 19:19:52,748 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 547 transitions, 8433 flow [2024-06-03 19:19:52,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:52,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:52,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:52,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:19:52,749 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:19:52,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1504428260, now seen corresponding path program 1 times [2024-06-03 19:19:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:52,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297911110] [2024-06-03 19:19:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:53,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297911110] [2024-06-03 19:19:53,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297911110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:53,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:53,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:19:53,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555907802] [2024-06-03 19:19:53,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:53,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:19:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:19:53,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:19:53,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:19:53,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 547 transitions, 8433 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:53,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:53,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:19:53,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:56,948 INFO L124 PetriNetUnfolderBase]: 6206/9513 cut-off events. [2024-06-03 19:19:56,949 INFO L125 PetriNetUnfolderBase]: For 2329232/2329240 co-relation queries the response was YES. [2024-06-03 19:19:57,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99169 conditions, 9513 events. 6206/9513 cut-off events. For 2329232/2329240 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 57155 event pairs, 1518 based on Foata normal form. 4/9486 useless extension candidates. Maximal degree in co-relation 98982. Up to 9158 conditions per place. [2024-06-03 19:19:57,106 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 508 selfloop transitions, 31 changer transitions 0/578 dead transitions. [2024-06-03 19:19:57,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 578 transitions, 9662 flow [2024-06-03 19:19:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:19:57,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:19:57,108 INFO L175 Difference]: Start difference. First operand has 389 places, 547 transitions, 8433 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:19:57,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 578 transitions, 9662 flow [2024-06-03 19:20:03,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 578 transitions, 9550 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:20:03,298 INFO L231 Difference]: Finished difference. Result has 390 places, 550 transitions, 8442 flow [2024-06-03 19:20:03,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8442, PETRI_PLACES=390, PETRI_TRANSITIONS=550} [2024-06-03 19:20:03,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-03 19:20:03,299 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 550 transitions, 8442 flow [2024-06-03 19:20:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:03,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:03,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:03,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:20:03,300 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:03,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1504071760, now seen corresponding path program 5 times [2024-06-03 19:20:03,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:03,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401858285] [2024-06-03 19:20:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:03,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:04,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401858285] [2024-06-03 19:20:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401858285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:20:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730668128] [2024-06-03 19:20:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:20:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:20:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:20:04,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:04,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 550 transitions, 8442 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:04,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:04,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:04,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:07,664 INFO L124 PetriNetUnfolderBase]: 6223/9539 cut-off events. [2024-06-03 19:20:07,665 INFO L125 PetriNetUnfolderBase]: For 2379470/2379475 co-relation queries the response was YES. [2024-06-03 19:20:07,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99679 conditions, 9539 events. 6223/9539 cut-off events. For 2379470/2379475 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 57216 event pairs, 1487 based on Foata normal form. 4/9513 useless extension candidates. Maximal degree in co-relation 99491. Up to 9203 conditions per place. [2024-06-03 19:20:07,840 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 24 changer transitions 0/584 dead transitions. [2024-06-03 19:20:07,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 584 transitions, 9728 flow [2024-06-03 19:20:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:20:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:20:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:20:07,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:20:07,842 INFO L175 Difference]: Start difference. First operand has 390 places, 550 transitions, 8442 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:20:07,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 584 transitions, 9728 flow [2024-06-03 19:20:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 584 transitions, 9661 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:20:14,130 INFO L231 Difference]: Finished difference. Result has 392 places, 552 transitions, 8508 flow [2024-06-03 19:20:14,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8508, PETRI_PLACES=392, PETRI_TRANSITIONS=552} [2024-06-03 19:20:14,131 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-03 19:20:14,131 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 552 transitions, 8508 flow [2024-06-03 19:20:14,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:14,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:14,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:14,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:20:14,132 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:14,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1043058036, now seen corresponding path program 6 times [2024-06-03 19:20:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:14,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507181315] [2024-06-03 19:20:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:15,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507181315] [2024-06-03 19:20:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507181315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:15,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:15,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:20:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216484795] [2024-06-03 19:20:15,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:15,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:20:15,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:20:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:20:15,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:15,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 552 transitions, 8508 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:15,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:15,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:15,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:18,373 INFO L124 PetriNetUnfolderBase]: 6215/9527 cut-off events. [2024-06-03 19:20:18,374 INFO L125 PetriNetUnfolderBase]: For 2401384/2401389 co-relation queries the response was YES. [2024-06-03 19:20:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99651 conditions, 9527 events. 6215/9527 cut-off events. For 2401384/2401389 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57257 event pairs, 1513 based on Foata normal form. 4/9501 useless extension candidates. Maximal degree in co-relation 99462. Up to 9169 conditions per place. [2024-06-03 19:20:18,539 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 517 selfloop transitions, 30 changer transitions 0/586 dead transitions. [2024-06-03 19:20:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 586 transitions, 9804 flow [2024-06-03 19:20:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:20:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:20:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 19:20:18,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:20:18,541 INFO L175 Difference]: Start difference. First operand has 392 places, 552 transitions, 8508 flow. Second operand 10 states and 176 transitions. [2024-06-03 19:20:18,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 586 transitions, 9804 flow [2024-06-03 19:20:24,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 586 transitions, 9689 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 19:20:24,567 INFO L231 Difference]: Finished difference. Result has 394 places, 554 transitions, 8545 flow [2024-06-03 19:20:24,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=394, PETRI_TRANSITIONS=554} [2024-06-03 19:20:24,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-03 19:20:24,568 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 554 transitions, 8545 flow [2024-06-03 19:20:24,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:24,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:24,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:24,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:20:24,569 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)] === [2024-06-03 19:20:24,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -160610116, now seen corresponding path program 5 times [2024-06-03 19:20:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:24,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635305057] [2024-06-03 19:20:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635305057] [2024-06-03 19:20:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635305057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:25,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:25,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370229164] [2024-06-03 19:20:25,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:25,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:25,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 554 transitions, 8545 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) [2024-06-03 19:20:25,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:25,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:25,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:28,338 INFO L124 PetriNetUnfolderBase]: 6284/9628 cut-off events. [2024-06-03 19:20:28,339 INFO L125 PetriNetUnfolderBase]: For 2523428/2523431 co-relation queries the response was YES. [2024-06-03 19:20:28,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102180 conditions, 9628 events. 6284/9628 cut-off events. For 2523428/2523431 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57879 event pairs, 1587 based on Foata normal form. 8/9597 useless extension candidates. Maximal degree in co-relation 101990. Up to 9139 conditions per place. [2024-06-03 19:20:28,512 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 497 selfloop transitions, 63 changer transitions 0/590 dead transitions. [2024-06-03 19:20:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 590 transitions, 10568 flow [2024-06-03 19:20:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:20:28,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-03 19:20:28,513 INFO L175 Difference]: Start difference. First operand has 394 places, 554 transitions, 8545 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:20:28,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 590 transitions, 10568 flow [2024-06-03 19:20:34,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 590 transitions, 10444 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 19:20:34,373 INFO L231 Difference]: Finished difference. Result has 395 places, 571 transitions, 8926 flow [2024-06-03 19:20:34,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8421, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8926, PETRI_PLACES=395, PETRI_TRANSITIONS=571} [2024-06-03 19:20:34,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-03 19:20:34,374 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 571 transitions, 8926 flow [2024-06-03 19:20:34,374 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) [2024-06-03 19:20:34,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:34,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:20:34,375 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)] === [2024-06-03 19:20:34,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1774183829, now seen corresponding path program 4 times [2024-06-03 19:20:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:34,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263328877] [2024-06-03 19:20:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263328877] [2024-06-03 19:20:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263328877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:35,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:35,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:35,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178999950] [2024-06-03 19:20:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:35,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:35,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:35,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:35,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 571 transitions, 8926 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) [2024-06-03 19:20:35,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:38,326 INFO L124 PetriNetUnfolderBase]: 6294/9642 cut-off events. [2024-06-03 19:20:38,327 INFO L125 PetriNetUnfolderBase]: For 2534293/2534296 co-relation queries the response was YES. [2024-06-03 19:20:38,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102695 conditions, 9642 events. 6294/9642 cut-off events. For 2534293/2534296 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57977 event pairs, 1617 based on Foata normal form. 4/9607 useless extension candidates. Maximal degree in co-relation 102503. Up to 9373 conditions per place. [2024-06-03 19:20:38,484 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 519 selfloop transitions, 36 changer transitions 0/585 dead transitions. [2024-06-03 19:20:38,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 585 transitions, 10138 flow [2024-06-03 19:20:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:20:38,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-03 19:20:38,486 INFO L175 Difference]: Start difference. First operand has 395 places, 571 transitions, 8926 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:20:38,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 585 transitions, 10138 flow [2024-06-03 19:20:45,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 9803 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-03 19:20:45,023 INFO L231 Difference]: Finished difference. Result has 398 places, 575 transitions, 8750 flow [2024-06-03 19:20:45,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8750, PETRI_PLACES=398, PETRI_TRANSITIONS=575} [2024-06-03 19:20:45,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-03 19:20:45,039 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 575 transitions, 8750 flow [2024-06-03 19:20:45,039 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) [2024-06-03 19:20:45,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:45,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:20:45,040 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)] === [2024-06-03 19:20:45,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -363397422, now seen corresponding path program 6 times [2024-06-03 19:20:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:45,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436107645] [2024-06-03 19:20:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436107645] [2024-06-03 19:20:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436107645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:45,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:45,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:45,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054396224] [2024-06-03 19:20:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:46,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:46,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 575 transitions, 8750 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) [2024-06-03 19:20:46,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:46,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:46,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:48,696 INFO L124 PetriNetUnfolderBase]: 6276/9618 cut-off events. [2024-06-03 19:20:48,696 INFO L125 PetriNetUnfolderBase]: For 2559656/2559659 co-relation queries the response was YES. [2024-06-03 19:20:48,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101387 conditions, 9618 events. 6276/9618 cut-off events. For 2559656/2559659 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57815 event pairs, 1582 based on Foata normal form. 8/9587 useless extension candidates. Maximal degree in co-relation 101194. Up to 9142 conditions per place. [2024-06-03 19:20:48,852 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 496 selfloop transitions, 68 changer transitions 0/594 dead transitions. [2024-06-03 19:20:48,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 594 transitions, 10445 flow [2024-06-03 19:20:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:20:48,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-03 19:20:48,853 INFO L175 Difference]: Start difference. First operand has 398 places, 575 transitions, 8750 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:20:48,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 594 transitions, 10445 flow [2024-06-03 19:20:55,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 594 transitions, 10268 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:55,468 INFO L231 Difference]: Finished difference. Result has 399 places, 576 transitions, 8754 flow [2024-06-03 19:20:55,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8576, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=399, PETRI_TRANSITIONS=576} [2024-06-03 19:20:55,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-03 19:20:55,470 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 576 transitions, 8754 flow [2024-06-03 19:20:55,470 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) [2024-06-03 19:20:55,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:55,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:20:55,471 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)] === [2024-06-03 19:20:55,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -160177666, now seen corresponding path program 7 times [2024-06-03 19:20:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:55,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336306488] [2024-06-03 19:20:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:56,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336306488] [2024-06-03 19:20:56,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336306488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:56,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691031042] [2024-06-03 19:20:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:56,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:20:56,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 576 transitions, 8754 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) [2024-06-03 19:20:56,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:56,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:20:56,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:59,131 INFO L124 PetriNetUnfolderBase]: 6264/9603 cut-off events. [2024-06-03 19:20:59,131 INFO L125 PetriNetUnfolderBase]: For 2552259/2552262 co-relation queries the response was YES. [2024-06-03 19:20:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101032 conditions, 9603 events. 6264/9603 cut-off events. For 2552259/2552262 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 57750 event pairs, 1590 based on Foata normal form. 8/9572 useless extension candidates. Maximal degree in co-relation 100838. Up to 9271 conditions per place. [2024-06-03 19:20:59,304 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 522 selfloop transitions, 39 changer transitions 0/591 dead transitions. [2024-06-03 19:20:59,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 591 transitions, 10162 flow [2024-06-03 19:20:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:20:59,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:20:59,305 INFO L175 Difference]: Start difference. First operand has 399 places, 576 transitions, 8754 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:20:59,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 591 transitions, 10162 flow [2024-06-03 19:21:05,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 591 transitions, 9854 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:05,739 INFO L231 Difference]: Finished difference. Result has 401 places, 576 transitions, 8534 flow [2024-06-03 19:21:05,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8534, PETRI_PLACES=401, PETRI_TRANSITIONS=576} [2024-06-03 19:21:05,740 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-03 19:21:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 576 transitions, 8534 flow [2024-06-03 19:21:05,741 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) [2024-06-03 19:21:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:21:05,742 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)] === [2024-06-03 19:21:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -145372531, now seen corresponding path program 1 times [2024-06-03 19:21:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:05,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360517913] [2024-06-03 19:21:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat