./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033_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/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix033_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-cde23df-m [2024-06-14 12:17:42,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:17:42,372 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:17:42,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:17:42,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:17:42,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:17:42,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:17:42,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:17:42,411 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:17:42,411 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:17:42,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:17:42,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:17:42,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:17:42,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:17:42,413 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:17:42,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:17:42,414 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:17:42,414 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:17:42,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:17:42,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:17:42,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:17:42,416 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:17:42,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:17:42,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:17:42,417 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:17:42,417 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:17:42,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:17:42,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:17:42,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:17:42,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:17:42,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:17:42,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:17:42,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:17:42,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:17:42,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:17:42,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:17:42,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:17:42,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:17:42,421 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:17:42,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:17:42,422 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:17:42,422 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:17:42,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:17:42,423 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:17:42,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:17:42,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:17:42,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:17:42,782 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:17:42,783 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:17:42,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:17:42,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:17:42,984 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:17:42,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:17:44,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:17:44,477 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:17:44,481 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:17:44,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7fd5ad1/da4565dca0ff4ee48251a383267038b2/FLAG73d7a30a4 [2024-06-14 12:17:44,519 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7fd5ad1/da4565dca0ff4ee48251a383267038b2 [2024-06-14 12:17:44,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:17:44,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:17:44,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:17:44,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:17:44,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:17:44,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:42" (1/2) ... [2024-06-14 12:17:44,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60dba247 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:17:44, skipping insertion in model container [2024-06-14 12:17:44,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:42" (1/2) ... [2024-06-14 12:17:44,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60962a0e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:17:44, skipping insertion in model container [2024-06-14 12:17:44,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:17:44" (2/2) ... [2024-06-14 12:17:44,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60dba247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:44, skipping insertion in model container [2024-06-14 12:17:44,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:17:44" (2/2) ... [2024-06-14 12:17:44,533 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:17:44,627 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:17:44,628 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 12:17:44,628 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 12:17:44,629 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || b$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 12:17:44,629 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:17:44,629 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 12:17:44,675 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:17:45,057 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:17:45,071 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:17:45,213 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:17:45,245 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:17:45,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45 WrapperNode [2024-06-14 12:17:45,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:17:45,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:17:45,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:17:45,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:17:45,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,318 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 129 [2024-06-14 12:17:45,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:17:45,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:17:45,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:17:45,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:17:45,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,334 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,357 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:17:45,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,369 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:17:45,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:17:45,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:17:45,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:17:45,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (1/1) ... [2024-06-14 12:17:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:17:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:17:45,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:17:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:17:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:17:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:17:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:17:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:17:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:17:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:17:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:17:45,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:17:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:17:45,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:17:45,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:17:45,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:17:45,545 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:17:45,664 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:17:45,666 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:17:46,082 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:17:46,085 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:17:46,286 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:17:46,286 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:17:46,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:17:46 BoogieIcfgContainer [2024-06-14 12:17:46,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:17:46,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:17:46,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:17:46,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:17:46,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:42" (1/4) ... [2024-06-14 12:17:46,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135755f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:17:46, skipping insertion in model container [2024-06-14 12:17:46,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:17:44" (2/4) ... [2024-06-14 12:17:46,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135755f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:17:46, skipping insertion in model container [2024-06-14 12:17:46,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:45" (3/4) ... [2024-06-14 12:17:46,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135755f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:17:46, skipping insertion in model container [2024-06-14 12:17:46,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:17:46" (4/4) ... [2024-06-14 12:17:46,299 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:17:46,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:17:46,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:17:46,315 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:17:46,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:17:46,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 45 transitions, 102 flow [2024-06-14 12:17:46,484 INFO L124 PetriNetUnfolderBase]: 0/42 cut-off events. [2024-06-14 12:17:46,484 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:17:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:17:46,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 45 transitions, 102 flow [2024-06-14 12:17:46,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 36 transitions, 81 flow [2024-06-14 12:17:46,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:17:46,535 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;@64e6672e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:17:46,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:17:46,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:17:46,557 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:17:46,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:17:46,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:46,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:17:46,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:46,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:46,564 INFO L85 PathProgramCache]: Analyzing trace with hash -910936685, now seen corresponding path program 1 times [2024-06-14 12:17:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652407539] [2024-06-14 12:17:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:47,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652407539] [2024-06-14 12:17:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652407539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:47,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:17:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384342599] [2024-06-14 12:17:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:17:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:17:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:17:48,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:48,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:48,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:48,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:48,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:48,639 INFO L124 PetriNetUnfolderBase]: 1911/2946 cut-off events. [2024-06-14 12:17:48,640 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:17:48,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 2946 events. 1911/2946 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14907 event pairs, 1379 based on Foata normal form. 1/2857 useless extension candidates. Maximal degree in co-relation 5857. Up to 2825 conditions per place. [2024-06-14 12:17:48,664 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 12:17:48,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 187 flow [2024-06-14 12:17:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:17:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:17:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-14 12:17:48,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-06-14 12:17:48,677 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 81 flow. Second operand 3 states and 79 transitions. [2024-06-14 12:17:48,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 187 flow [2024-06-14 12:17:48,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:48,685 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 108 flow [2024-06-14 12:17:48,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:17:48,691 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-06-14 12:17:48,691 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 108 flow [2024-06-14 12:17:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:48,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:48,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:48,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:17:48,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:48,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 763191026, now seen corresponding path program 1 times [2024-06-14 12:17:48,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:48,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085779440] [2024-06-14 12:17:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:48,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085779440] [2024-06-14 12:17:49,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085779440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:49,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:49,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:17:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491158251] [2024-06-14 12:17:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:49,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:17:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:17:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:17:49,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:49,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 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) [2024-06-14 12:17:49,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:49,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:49,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:50,156 INFO L124 PetriNetUnfolderBase]: 1905/2937 cut-off events. [2024-06-14 12:17:50,157 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-06-14 12:17:50,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6560 conditions, 2937 events. 1905/2937 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14853 event pairs, 1212 based on Foata normal form. 3/2890 useless extension candidates. Maximal degree in co-relation 6545. Up to 2801 conditions per place. [2024-06-14 12:17:50,172 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-14 12:17:50,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 254 flow [2024-06-14 12:17:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:17:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:17:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 12:17:50,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-14 12:17:50,175 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 101 transitions. [2024-06-14 12:17:50,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 254 flow [2024-06-14 12:17:50,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:17:50,177 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 144 flow [2024-06-14 12:17:50,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:17:50,178 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-06-14 12:17:50,179 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 144 flow [2024-06-14 12:17:50,179 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) [2024-06-14 12:17:50,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:50,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:50,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:17:50,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:50,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2110881380, now seen corresponding path program 1 times [2024-06-14 12:17:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115081037] [2024-06-14 12:17:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:50,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115081037] [2024-06-14 12:17:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115081037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:51,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:17:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122063895] [2024-06-14 12:17:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:51,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:17:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:17:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:17:51,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:51,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 144 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) [2024-06-14 12:17:51,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:51,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:51,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:51,828 INFO L124 PetriNetUnfolderBase]: 1913/2963 cut-off events. [2024-06-14 12:17:51,829 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2024-06-14 12:17:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7295 conditions, 2963 events. 1913/2963 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15028 event pairs, 951 based on Foata normal form. 5/2924 useless extension candidates. Maximal degree in co-relation 7278. Up to 2747 conditions per place. [2024-06-14 12:17:51,848 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 56 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-14 12:17:51,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 408 flow [2024-06-14 12:17:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:17:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:17:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 12:17:51,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-06-14 12:17:51,851 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 144 flow. Second operand 5 states and 131 transitions. [2024-06-14 12:17:51,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 408 flow [2024-06-14 12:17:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 394 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:17:51,860 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 243 flow [2024-06-14 12:17:51,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-06-14 12:17:51,862 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-06-14 12:17:51,862 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 243 flow [2024-06-14 12:17:51,862 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) [2024-06-14 12:17:51,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:51,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:17:51,863 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)] === [2024-06-14 12:17:51,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1012812719, now seen corresponding path program 1 times [2024-06-14 12:17:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:51,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691784950] [2024-06-14 12:17:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691784950] [2024-06-14 12:17:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691784950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:17:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587825904] [2024-06-14 12:17:53,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:17:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:17:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:17:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:53,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 243 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) [2024-06-14 12:17:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:53,914 INFO L124 PetriNetUnfolderBase]: 1921/2975 cut-off events. [2024-06-14 12:17:53,914 INFO L125 PetriNetUnfolderBase]: For 3605/3608 co-relation queries the response was YES. [2024-06-14 12:17:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8540 conditions, 2975 events. 1921/2975 cut-off events. For 3605/3608 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15156 event pairs, 784 based on Foata normal form. 7/2938 useless extension candidates. Maximal degree in co-relation 8520. Up to 2733 conditions per place. [2024-06-14 12:17:53,933 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 63 selfloop transitions, 20 changer transitions 0/89 dead transitions. [2024-06-14 12:17:53,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 535 flow [2024-06-14 12:17:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:17:53,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-06-14 12:17:53,938 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 243 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:17:53,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 535 flow [2024-06-14 12:17:53,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 527 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:17:53,946 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 316 flow [2024-06-14 12:17:53,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-14 12:17:53,947 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-06-14 12:17:53,947 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 316 flow [2024-06-14 12:17:53,948 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) [2024-06-14 12:17:53,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:53,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:17:53,948 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)] === [2024-06-14 12:17:53,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1240038503, now seen corresponding path program 1 times [2024-06-14 12:17:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:53,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853940189] [2024-06-14 12:17:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:55,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:55,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853940189] [2024-06-14 12:17:55,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853940189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:55,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:55,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:55,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524196235] [2024-06-14 12:17:55,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:55,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:55,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 316 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) [2024-06-14 12:17:55,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:55,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:55,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:56,215 INFO L124 PetriNetUnfolderBase]: 1933/2995 cut-off events. [2024-06-14 12:17:56,215 INFO L125 PetriNetUnfolderBase]: For 5679/5682 co-relation queries the response was YES. [2024-06-14 12:17:56,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9501 conditions, 2995 events. 1933/2995 cut-off events. For 5679/5682 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15208 event pairs, 596 based on Foata normal form. 12/2963 useless extension candidates. Maximal degree in co-relation 9478. Up to 2701 conditions per place. [2024-06-14 12:17:56,243 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 67 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-14 12:17:56,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 636 flow [2024-06-14 12:17:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 12:17:56,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492063492063493 [2024-06-14 12:17:56,245 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 316 flow. Second operand 7 states and 173 transitions. [2024-06-14 12:17:56,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 636 flow [2024-06-14 12:17:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 587 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:56,252 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-14 12:17:56,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-14 12:17:56,253 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-06-14 12:17:56,254 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-14 12:17:56,254 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) [2024-06-14 12:17:56,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:56,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:17:56,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:56,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1422805602, now seen corresponding path program 1 times [2024-06-14 12:17:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036754684] [2024-06-14 12:17:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:57,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036754684] [2024-06-14 12:17:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036754684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:57,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:57,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:17:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514436754] [2024-06-14 12:17:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:57,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:17:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:17:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:17:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 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) [2024-06-14 12:17:57,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:57,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:57,865 INFO L124 PetriNetUnfolderBase]: 1928/2982 cut-off events. [2024-06-14 12:17:57,865 INFO L125 PetriNetUnfolderBase]: For 7782/7782 co-relation queries the response was YES. [2024-06-14 12:17:57,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10093 conditions, 2982 events. 1928/2982 cut-off events. For 7782/7782 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15102 event pairs, 776 based on Foata normal form. 2/2939 useless extension candidates. Maximal degree in co-relation 10069. Up to 2844 conditions per place. [2024-06-14 12:17:57,895 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 56 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2024-06-14 12:17:57,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 499 flow [2024-06-14 12:17:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:17:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:17:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-14 12:17:57,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2024-06-14 12:17:57,897 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 5 states and 103 transitions. [2024-06-14 12:17:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 499 flow [2024-06-14 12:17:57,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 435 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:57,904 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 303 flow [2024-06-14 12:17:57,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-14 12:17:57,908 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-06-14 12:17:57,908 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 303 flow [2024-06-14 12:17:57,909 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) [2024-06-14 12:17:57,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:57,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:57,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:17:57,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:57,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1158279366, now seen corresponding path program 1 times [2024-06-14 12:17:57,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206883476] [2024-06-14 12:17:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:58,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:58,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206883476] [2024-06-14 12:17:58,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206883476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:58,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:58,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921741220] [2024-06-14 12:17:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:58,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:58,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:17:58,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:58,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:58,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:17:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:59,759 INFO L124 PetriNetUnfolderBase]: 2264/3485 cut-off events. [2024-06-14 12:17:59,759 INFO L125 PetriNetUnfolderBase]: For 10324/10324 co-relation queries the response was YES. [2024-06-14 12:17:59,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11655 conditions, 3485 events. 2264/3485 cut-off events. For 10324/10324 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17559 event pairs, 936 based on Foata normal form. 2/3477 useless extension candidates. Maximal degree in co-relation 11629. Up to 3319 conditions per place. [2024-06-14 12:17:59,784 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-14 12:17:59,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 505 flow [2024-06-14 12:17:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 12:17:59,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-14 12:17:59,787 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 303 flow. Second operand 6 states and 116 transitions. [2024-06-14 12:17:59,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 505 flow [2024-06-14 12:17:59,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 483 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:59,795 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 337 flow [2024-06-14 12:17:59,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-14 12:17:59,797 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-06-14 12:17:59,797 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 337 flow [2024-06-14 12:17:59,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:59,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:59,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:59,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:17:59,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:59,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1778501389, now seen corresponding path program 1 times [2024-06-14 12:17:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:59,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672575209] [2024-06-14 12:17:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:59,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:00,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:00,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672575209] [2024-06-14 12:18:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672575209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:00,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:00,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:00,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780597831] [2024-06-14 12:18:00,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:00,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:00,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:01,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 337 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) [2024-06-14 12:18:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:01,651 INFO L124 PetriNetUnfolderBase]: 2136/3357 cut-off events. [2024-06-14 12:18:01,652 INFO L125 PetriNetUnfolderBase]: For 13144/13150 co-relation queries the response was YES. [2024-06-14 12:18:01,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 3357 events. 2136/3357 cut-off events. For 13144/13150 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17454 event pairs, 853 based on Foata normal form. 8/3352 useless extension candidates. Maximal degree in co-relation 11939. Up to 3068 conditions per place. [2024-06-14 12:18:01,674 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 59 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-14 12:18:01,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 593 flow [2024-06-14 12:18:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:18:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:18:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 12:18:01,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:18:01,677 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 337 flow. Second operand 6 states and 130 transitions. [2024-06-14 12:18:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 593 flow [2024-06-14 12:18:01,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 561 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:01,692 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-14 12:18:01,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-14 12:18:01,695 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-06-14 12:18:01,696 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-14 12:18:01,696 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) [2024-06-14 12:18:01,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:01,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:01,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:18:01,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:01,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1515763097, now seen corresponding path program 2 times [2024-06-14 12:18:01,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:01,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557581517] [2024-06-14 12:18:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:01,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557581517] [2024-06-14 12:18:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557581517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48879545] [2024-06-14 12:18:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:02,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:02,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:02,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:02,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 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) [2024-06-14 12:18:02,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:02,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:03,424 INFO L124 PetriNetUnfolderBase]: 2121/3331 cut-off events. [2024-06-14 12:18:03,425 INFO L125 PetriNetUnfolderBase]: For 15350/15350 co-relation queries the response was YES. [2024-06-14 12:18:03,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12240 conditions, 3331 events. 2121/3331 cut-off events. For 15350/15350 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17256 event pairs, 849 based on Foata normal form. 2/3321 useless extension candidates. Maximal degree in co-relation 12213. Up to 3109 conditions per place. [2024-06-14 12:18:03,445 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 62 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-06-14 12:18:03,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 80 transitions, 561 flow [2024-06-14 12:18:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:18:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:18:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:18:03,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-14 12:18:03,447 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:18:03,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 80 transitions, 561 flow [2024-06-14 12:18:03,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 532 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:03,455 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 378 flow [2024-06-14 12:18:03,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-06-14 12:18:03,456 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2024-06-14 12:18:03,456 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 378 flow [2024-06-14 12:18:03,456 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) [2024-06-14 12:18:03,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:03,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:03,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:18:03,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:03,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1833761115, now seen corresponding path program 1 times [2024-06-14 12:18:03,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:03,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763972341] [2024-06-14 12:18:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:03,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:04,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763972341] [2024-06-14 12:18:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763972341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:04,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813335767] [2024-06-14 12:18:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:04,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:04,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 378 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) [2024-06-14 12:18:04,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:04,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:04,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:05,343 INFO L124 PetriNetUnfolderBase]: 2245/3434 cut-off events. [2024-06-14 12:18:05,343 INFO L125 PetriNetUnfolderBase]: For 17996/17996 co-relation queries the response was YES. [2024-06-14 12:18:05,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12878 conditions, 3434 events. 2245/3434 cut-off events. For 17996/17996 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17111 event pairs, 888 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 12850. Up to 3271 conditions per place. [2024-06-14 12:18:05,361 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 12:18:05,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 618 flow [2024-06-14 12:18:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:18:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-06-14 12:18:05,364 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 378 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:18:05,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 618 flow [2024-06-14 12:18:05,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 571 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:05,374 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 397 flow [2024-06-14 12:18:05,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-14 12:18:05,376 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-06-14 12:18:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 397 flow [2024-06-14 12:18:05,377 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) [2024-06-14 12:18:05,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:05,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:05,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:18:05,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:05,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:05,378 INFO L85 PathProgramCache]: Analyzing trace with hash 834643737, now seen corresponding path program 1 times [2024-06-14 12:18:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133429096] [2024-06-14 12:18:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:05,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133429096] [2024-06-14 12:18:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133429096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:06,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:06,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025267382] [2024-06-14 12:18:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:06,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:06,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:06,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:06,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 397 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) [2024-06-14 12:18:06,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:06,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:06,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:07,186 INFO L124 PetriNetUnfolderBase]: 2267/3501 cut-off events. [2024-06-14 12:18:07,186 INFO L125 PetriNetUnfolderBase]: For 21437/21443 co-relation queries the response was YES. [2024-06-14 12:18:07,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13715 conditions, 3501 events. 2267/3501 cut-off events. For 21437/21443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17728 event pairs, 872 based on Foata normal form. 5/3489 useless extension candidates. Maximal degree in co-relation 13686. Up to 3193 conditions per place. [2024-06-14 12:18:07,206 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 69 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-14 12:18:07,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 747 flow [2024-06-14 12:18:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:18:07,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:18:07,208 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 397 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:18:07,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 747 flow [2024-06-14 12:18:07,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 705 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:07,223 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 478 flow [2024-06-14 12:18:07,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=478, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-14 12:18:07,223 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2024-06-14 12:18:07,224 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 478 flow [2024-06-14 12:18:07,224 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) [2024-06-14 12:18:07,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:07,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:07,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:18:07,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:07,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 232092245, now seen corresponding path program 2 times [2024-06-14 12:18:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:07,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455162153] [2024-06-14 12:18:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:07,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:08,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:08,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455162153] [2024-06-14 12:18:08,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455162153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:08,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:08,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:08,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009733360] [2024-06-14 12:18:08,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:08,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:08,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:08,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:08,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 478 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) [2024-06-14 12:18:08,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:08,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:08,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:09,100 INFO L124 PetriNetUnfolderBase]: 2278/3524 cut-off events. [2024-06-14 12:18:09,100 INFO L125 PetriNetUnfolderBase]: For 26601/26601 co-relation queries the response was YES. [2024-06-14 12:18:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14690 conditions, 3524 events. 2278/3524 cut-off events. For 26601/26601 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17971 event pairs, 1238 based on Foata normal form. 2/3507 useless extension candidates. Maximal degree in co-relation 14660. Up to 3328 conditions per place. [2024-06-14 12:18:09,123 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 77 selfloop transitions, 16 changer transitions 0/98 dead transitions. [2024-06-14 12:18:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 754 flow [2024-06-14 12:18:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:18:09,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:18:09,125 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 478 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:18:09,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 754 flow [2024-06-14 12:18:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 715 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:09,140 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 534 flow [2024-06-14 12:18:09,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=534, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-14 12:18:09,141 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2024-06-14 12:18:09,141 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 534 flow [2024-06-14 12:18:09,142 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) [2024-06-14 12:18:09,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:09,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:09,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:18:09,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:09,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:09,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1011775257, now seen corresponding path program 3 times [2024-06-14 12:18:09,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:09,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174863328] [2024-06-14 12:18:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:10,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:10,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174863328] [2024-06-14 12:18:10,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174863328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:10,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:10,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175543276] [2024-06-14 12:18:10,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:10,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:10,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:10,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:10,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 534 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) [2024-06-14 12:18:10,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:10,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:10,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:11,100 INFO L124 PetriNetUnfolderBase]: 2273/3517 cut-off events. [2024-06-14 12:18:11,100 INFO L125 PetriNetUnfolderBase]: For 30445/30445 co-relation queries the response was YES. [2024-06-14 12:18:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15134 conditions, 3517 events. 2273/3517 cut-off events. For 30445/30445 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17896 event pairs, 1238 based on Foata normal form. 2/3500 useless extension candidates. Maximal degree in co-relation 15101. Up to 3303 conditions per place. [2024-06-14 12:18:11,127 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 76 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-14 12:18:11,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 101 transitions, 810 flow [2024-06-14 12:18:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:18:11,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:18:11,129 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 534 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:18:11,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 101 transitions, 810 flow [2024-06-14 12:18:11,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 101 transitions, 762 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:11,151 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 578 flow [2024-06-14 12:18:11,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-14 12:18:11,153 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-06-14 12:18:11,153 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 578 flow [2024-06-14 12:18:11,154 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) [2024-06-14 12:18:11,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:11,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:11,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:18:11,154 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)] === [2024-06-14 12:18:11,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -3310555, now seen corresponding path program 1 times [2024-06-14 12:18:11,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:11,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547556672] [2024-06-14 12:18:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547556672] [2024-06-14 12:18:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547556672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:18:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101878779] [2024-06-14 12:18:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:18:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:18:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:18:12,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 578 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:12,602 INFO L124 PetriNetUnfolderBase]: 2510/3863 cut-off events. [2024-06-14 12:18:12,602 INFO L125 PetriNetUnfolderBase]: For 40834/40835 co-relation queries the response was YES. [2024-06-14 12:18:12,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17216 conditions, 3863 events. 2510/3863 cut-off events. For 40834/40835 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19608 event pairs, 1403 based on Foata normal form. 1/3850 useless extension candidates. Maximal degree in co-relation 17182. Up to 3657 conditions per place. [2024-06-14 12:18:12,625 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 74 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-06-14 12:18:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 786 flow [2024-06-14 12:18:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:18:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:18:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-14 12:18:12,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:18:12,626 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 578 flow. Second operand 5 states and 95 transitions. [2024-06-14 12:18:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 786 flow [2024-06-14 12:18:12,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 722 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:12,648 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 568 flow [2024-06-14 12:18:12,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-14 12:18:12,649 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-06-14 12:18:12,649 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 568 flow [2024-06-14 12:18:12,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:12,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:12,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:12,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:18:12,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1796355778, now seen corresponding path program 1 times [2024-06-14 12:18:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:12,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418904743] [2024-06-14 12:18:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418904743] [2024-06-14 12:18:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418904743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:13,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:13,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319939710] [2024-06-14 12:18:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:13,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:13,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:14,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:14,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 568 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) [2024-06-14 12:18:14,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:14,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:14,764 INFO L124 PetriNetUnfolderBase]: 2274/3570 cut-off events. [2024-06-14 12:18:14,764 INFO L125 PetriNetUnfolderBase]: For 38745/38760 co-relation queries the response was YES. [2024-06-14 12:18:14,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16455 conditions, 3570 events. 2274/3570 cut-off events. For 38745/38760 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18496 event pairs, 804 based on Foata normal form. 16/3583 useless extension candidates. Maximal degree in co-relation 16420. Up to 3152 conditions per place. [2024-06-14 12:18:14,779 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 91 selfloop transitions, 44 changer transitions 0/146 dead transitions. [2024-06-14 12:18:14,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 146 transitions, 1164 flow [2024-06-14 12:18:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 12:18:14,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641975308641975 [2024-06-14 12:18:14,781 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 568 flow. Second operand 9 states and 188 transitions. [2024-06-14 12:18:14,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 146 transitions, 1164 flow [2024-06-14 12:18:14,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1132 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:14,799 INFO L231 Difference]: Finished difference. Result has 90 places, 113 transitions, 896 flow [2024-06-14 12:18:14,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=896, PETRI_PLACES=90, PETRI_TRANSITIONS=113} [2024-06-14 12:18:14,800 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2024-06-14 12:18:14,800 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 113 transitions, 896 flow [2024-06-14 12:18:14,800 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) [2024-06-14 12:18:14,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:14,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:18:14,801 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)] === [2024-06-14 12:18:14,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash -79201364, now seen corresponding path program 2 times [2024-06-14 12:18:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:14,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561218197] [2024-06-14 12:18:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561218197] [2024-06-14 12:18:15,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561218197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:15,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:15,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412556260] [2024-06-14 12:18:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:15,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:15,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:15,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:15,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:15,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:15,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:16,424 INFO L124 PetriNetUnfolderBase]: 2314/3631 cut-off events. [2024-06-14 12:18:16,424 INFO L125 PetriNetUnfolderBase]: For 45294/45313 co-relation queries the response was YES. [2024-06-14 12:18:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17881 conditions, 3631 events. 2314/3631 cut-off events. For 45294/45313 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18767 event pairs, 811 based on Foata normal form. 20/3648 useless extension candidates. Maximal degree in co-relation 17841. Up to 3151 conditions per place. [2024-06-14 12:18:16,444 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 86 selfloop transitions, 57 changer transitions 0/154 dead transitions. [2024-06-14 12:18:16,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1504 flow [2024-06-14 12:18:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 12:18:16,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 12:18:16,445 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 896 flow. Second operand 7 states and 155 transitions. [2024-06-14 12:18:16,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1504 flow [2024-06-14 12:18:16,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 154 transitions, 1463 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:18:16,477 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1190 flow [2024-06-14 12:18:16,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1190, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2024-06-14 12:18:16,478 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-06-14 12:18:16,478 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1190 flow [2024-06-14 12:18:16,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:16,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:16,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:16,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:18:16,480 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:16,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1853206581, now seen corresponding path program 1 times [2024-06-14 12:18:16,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:16,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141540428] [2024-06-14 12:18:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:17,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141540428] [2024-06-14 12:18:17,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141540428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:17,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:17,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:17,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622301263] [2024-06-14 12:18:17,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:17,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:17,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:17,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:17,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:17,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:17,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1190 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) [2024-06-14 12:18:17,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:17,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:17,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:18,220 INFO L124 PetriNetUnfolderBase]: 2524/3886 cut-off events. [2024-06-14 12:18:18,221 INFO L125 PetriNetUnfolderBase]: For 53427/53440 co-relation queries the response was YES. [2024-06-14 12:18:18,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 3886 events. 2524/3886 cut-off events. For 53427/53440 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19662 event pairs, 874 based on Foata normal form. 12/3895 useless extension candidates. Maximal degree in co-relation 20244. Up to 3432 conditions per place. [2024-06-14 12:18:18,244 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 116 selfloop transitions, 64 changer transitions 0/185 dead transitions. [2024-06-14 12:18:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 185 transitions, 2049 flow [2024-06-14 12:18:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:18:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:18:18,246 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1190 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:18:18,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 185 transitions, 2049 flow [2024-06-14 12:18:18,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 185 transitions, 1981 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:18,293 INFO L231 Difference]: Finished difference. Result has 105 places, 155 transitions, 1609 flow [2024-06-14 12:18:18,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1609, PETRI_PLACES=105, PETRI_TRANSITIONS=155} [2024-06-14 12:18:18,294 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-06-14 12:18:18,294 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 155 transitions, 1609 flow [2024-06-14 12:18:18,294 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) [2024-06-14 12:18:18,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:18,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:18,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:18:18,295 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:18,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1854037071, now seen corresponding path program 2 times [2024-06-14 12:18:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:18,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241146878] [2024-06-14 12:18:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241146878] [2024-06-14 12:18:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241146878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:19,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:19,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938425571] [2024-06-14 12:18:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:19,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:19,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:19,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 155 transitions, 1609 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) [2024-06-14 12:18:19,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:19,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:20,069 INFO L124 PetriNetUnfolderBase]: 2560/3941 cut-off events. [2024-06-14 12:18:20,069 INFO L125 PetriNetUnfolderBase]: For 53361/53380 co-relation queries the response was YES. [2024-06-14 12:18:20,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3941 events. 2560/3941 cut-off events. For 53361/53380 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19937 event pairs, 873 based on Foata normal form. 18/3956 useless extension candidates. Maximal degree in co-relation 20729. Up to 3467 conditions per place. [2024-06-14 12:18:20,092 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 118 selfloop transitions, 73 changer transitions 0/196 dead transitions. [2024-06-14 12:18:20,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 2358 flow [2024-06-14 12:18:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:18:20,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-14 12:18:20,093 INFO L175 Difference]: Start difference. First operand has 105 places, 155 transitions, 1609 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:18:20,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 2358 flow [2024-06-14 12:18:20,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 196 transitions, 2261 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:20,149 INFO L231 Difference]: Finished difference. Result has 111 places, 168 transitions, 1842 flow [2024-06-14 12:18:20,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1842, PETRI_PLACES=111, PETRI_TRANSITIONS=168} [2024-06-14 12:18:20,150 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 65 predicate places. [2024-06-14 12:18:20,150 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 168 transitions, 1842 flow [2024-06-14 12:18:20,151 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) [2024-06-14 12:18:20,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:20,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:18:20,151 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:20,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1854036854, now seen corresponding path program 1 times [2024-06-14 12:18:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:20,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565252207] [2024-06-14 12:18:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:20,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:21,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565252207] [2024-06-14 12:18:21,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565252207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:21,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:21,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:21,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532400133] [2024-06-14 12:18:21,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:21,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:21,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:21,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:21,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:21,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 168 transitions, 1842 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:21,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:21,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:21,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:22,238 INFO L124 PetriNetUnfolderBase]: 2670/4112 cut-off events. [2024-06-14 12:18:22,238 INFO L125 PetriNetUnfolderBase]: For 61695/61714 co-relation queries the response was YES. [2024-06-14 12:18:22,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22072 conditions, 4112 events. 2670/4112 cut-off events. For 61695/61714 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20948 event pairs, 798 based on Foata normal form. 24/4133 useless extension candidates. Maximal degree in co-relation 22022. Up to 3432 conditions per place. [2024-06-14 12:18:22,263 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 143 selfloop transitions, 74 changer transitions 0/222 dead transitions. [2024-06-14 12:18:22,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 222 transitions, 2697 flow [2024-06-14 12:18:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 12:18:22,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47160493827160493 [2024-06-14 12:18:22,266 INFO L175 Difference]: Start difference. First operand has 111 places, 168 transitions, 1842 flow. Second operand 9 states and 191 transitions. [2024-06-14 12:18:22,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 222 transitions, 2697 flow [2024-06-14 12:18:22,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 222 transitions, 2572 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:22,379 INFO L231 Difference]: Finished difference. Result has 119 places, 186 transitions, 2095 flow [2024-06-14 12:18:22,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2095, PETRI_PLACES=119, PETRI_TRANSITIONS=186} [2024-06-14 12:18:22,380 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 73 predicate places. [2024-06-14 12:18:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 186 transitions, 2095 flow [2024-06-14 12:18:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:22,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:18:22,381 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:22,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash 100338426, now seen corresponding path program 3 times [2024-06-14 12:18:22,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:22,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015839201] [2024-06-14 12:18:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:23,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015839201] [2024-06-14 12:18:23,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015839201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:23,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:23,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:23,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362316321] [2024-06-14 12:18:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:23,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:23,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:23,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:23,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 186 transitions, 2095 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) [2024-06-14 12:18:23,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:23,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:23,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:24,329 INFO L124 PetriNetUnfolderBase]: 2559/4015 cut-off events. [2024-06-14 12:18:24,329 INFO L125 PetriNetUnfolderBase]: For 70216/70235 co-relation queries the response was YES. [2024-06-14 12:18:24,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23135 conditions, 4015 events. 2559/4015 cut-off events. For 70216/70235 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 21011 event pairs, 756 based on Foata normal form. 21/4033 useless extension candidates. Maximal degree in co-relation 23081. Up to 3439 conditions per place. [2024-06-14 12:18:24,358 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 130 selfloop transitions, 68 changer transitions 0/220 dead transitions. [2024-06-14 12:18:24,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 220 transitions, 2766 flow [2024-06-14 12:18:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:18:24,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2024-06-14 12:18:24,359 INFO L175 Difference]: Start difference. First operand has 119 places, 186 transitions, 2095 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:18:24,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 220 transitions, 2766 flow [2024-06-14 12:18:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 220 transitions, 2713 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 12:18:24,430 INFO L231 Difference]: Finished difference. Result has 124 places, 195 transitions, 2316 flow [2024-06-14 12:18:24,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2316, PETRI_PLACES=124, PETRI_TRANSITIONS=195} [2024-06-14 12:18:24,431 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 78 predicate places. [2024-06-14 12:18:24,431 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 195 transitions, 2316 flow [2024-06-14 12:18:24,432 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) [2024-06-14 12:18:24,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:24,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:24,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:18:24,432 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:24,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1208226448, now seen corresponding path program 4 times [2024-06-14 12:18:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:24,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631135089] [2024-06-14 12:18:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:24,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631135089] [2024-06-14 12:18:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631135089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827139246] [2024-06-14 12:18:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:25,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:25,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 195 transitions, 2316 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) [2024-06-14 12:18:25,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:25,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:25,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:26,438 INFO L124 PetriNetUnfolderBase]: 2546/3997 cut-off events. [2024-06-14 12:18:26,438 INFO L125 PetriNetUnfolderBase]: For 75968/75987 co-relation queries the response was YES. [2024-06-14 12:18:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23393 conditions, 3997 events. 2546/3997 cut-off events. For 75968/75987 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20918 event pairs, 754 based on Foata normal form. 22/4016 useless extension candidates. Maximal degree in co-relation 23336. Up to 3519 conditions per place. [2024-06-14 12:18:26,469 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 143 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-14 12:18:26,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 2800 flow [2024-06-14 12:18:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 12:18:26,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-14 12:18:26,470 INFO L175 Difference]: Start difference. First operand has 124 places, 195 transitions, 2316 flow. Second operand 7 states and 146 transitions. [2024-06-14 12:18:26,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 2800 flow [2024-06-14 12:18:26,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 217 transitions, 2607 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:26,604 INFO L231 Difference]: Finished difference. Result has 127 places, 195 transitions, 2246 flow [2024-06-14 12:18:26,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2246, PETRI_PLACES=127, PETRI_TRANSITIONS=195} [2024-06-14 12:18:26,605 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 81 predicate places. [2024-06-14 12:18:26,605 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 195 transitions, 2246 flow [2024-06-14 12:18:26,605 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) [2024-06-14 12:18:26,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:26,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:26,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:18:26,606 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:26,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 104147861, now seen corresponding path program 3 times [2024-06-14 12:18:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482096854] [2024-06-14 12:18:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:27,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482096854] [2024-06-14 12:18:27,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482096854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:27,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:27,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707649914] [2024-06-14 12:18:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:27,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:27,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 195 transitions, 2246 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) [2024-06-14 12:18:27,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:27,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:27,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:28,357 INFO L124 PetriNetUnfolderBase]: 2703/4148 cut-off events. [2024-06-14 12:18:28,357 INFO L125 PetriNetUnfolderBase]: For 83544/83557 co-relation queries the response was YES. [2024-06-14 12:18:28,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24392 conditions, 4148 events. 2703/4148 cut-off events. For 83544/83557 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 21164 event pairs, 1019 based on Foata normal form. 14/4159 useless extension candidates. Maximal degree in co-relation 24334. Up to 3662 conditions per place. [2024-06-14 12:18:28,384 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 130 selfloop transitions, 94 changer transitions 0/229 dead transitions. [2024-06-14 12:18:28,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 229 transitions, 3011 flow [2024-06-14 12:18:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 12:18:28,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-06-14 12:18:28,385 INFO L175 Difference]: Start difference. First operand has 127 places, 195 transitions, 2246 flow. Second operand 7 states and 148 transitions. [2024-06-14 12:18:28,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 229 transitions, 3011 flow [2024-06-14 12:18:28,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 229 transitions, 2856 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:28,462 INFO L231 Difference]: Finished difference. Result has 128 places, 201 transitions, 2399 flow [2024-06-14 12:18:28,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=128, PETRI_TRANSITIONS=201} [2024-06-14 12:18:28,462 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 82 predicate places. [2024-06-14 12:18:28,462 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 201 transitions, 2399 flow [2024-06-14 12:18:28,462 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) [2024-06-14 12:18:28,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:28,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:28,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:18:28,463 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:28,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash 104153441, now seen corresponding path program 4 times [2024-06-14 12:18:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:28,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881756459] [2024-06-14 12:18:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881756459] [2024-06-14 12:18:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881756459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:29,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496098867] [2024-06-14 12:18:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:29,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 201 transitions, 2399 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) [2024-06-14 12:18:29,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:29,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:29,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:30,187 INFO L124 PetriNetUnfolderBase]: 2728/4202 cut-off events. [2024-06-14 12:18:30,187 INFO L125 PetriNetUnfolderBase]: For 89311/89326 co-relation queries the response was YES. [2024-06-14 12:18:30,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25139 conditions, 4202 events. 2728/4202 cut-off events. For 89311/89326 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 21501 event pairs, 814 based on Foata normal form. 16/4215 useless extension candidates. Maximal degree in co-relation 25080. Up to 3690 conditions per place. [2024-06-14 12:18:30,217 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 133 selfloop transitions, 96 changer transitions 0/234 dead transitions. [2024-06-14 12:18:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 234 transitions, 3205 flow [2024-06-14 12:18:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:18:30,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-14 12:18:30,218 INFO L175 Difference]: Start difference. First operand has 128 places, 201 transitions, 2399 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:18:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 234 transitions, 3205 flow [2024-06-14 12:18:30,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 234 transitions, 2926 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:30,303 INFO L231 Difference]: Finished difference. Result has 129 places, 210 transitions, 2509 flow [2024-06-14 12:18:30,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2509, PETRI_PLACES=129, PETRI_TRANSITIONS=210} [2024-06-14 12:18:30,304 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2024-06-14 12:18:30,304 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 210 transitions, 2509 flow [2024-06-14 12:18:30,304 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) [2024-06-14 12:18:30,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:30,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:30,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:18:30,305 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:30,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash 104153658, now seen corresponding path program 2 times [2024-06-14 12:18:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558659146] [2024-06-14 12:18:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558659146] [2024-06-14 12:18:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558659146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:31,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:31,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:31,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97768228] [2024-06-14 12:18:31,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:31,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:31,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:31,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:31,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:31,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:31,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 210 transitions, 2509 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:31,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:31,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:31,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:32,197 INFO L124 PetriNetUnfolderBase]: 2832/4354 cut-off events. [2024-06-14 12:18:32,197 INFO L125 PetriNetUnfolderBase]: For 92384/92399 co-relation queries the response was YES. [2024-06-14 12:18:32,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26054 conditions, 4354 events. 2832/4354 cut-off events. For 92384/92399 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22332 event pairs, 802 based on Foata normal form. 24/4375 useless extension candidates. Maximal degree in co-relation 25995. Up to 3547 conditions per place. [2024-06-14 12:18:32,228 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 147 selfloop transitions, 103 changer transitions 0/255 dead transitions. [2024-06-14 12:18:32,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 255 transitions, 3401 flow [2024-06-14 12:18:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:18:32,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-14 12:18:32,229 INFO L175 Difference]: Start difference. First operand has 129 places, 210 transitions, 2509 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:18:32,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 255 transitions, 3401 flow [2024-06-14 12:18:32,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 255 transitions, 3177 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:32,376 INFO L231 Difference]: Finished difference. Result has 132 places, 222 transitions, 2678 flow [2024-06-14 12:18:32,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2678, PETRI_PLACES=132, PETRI_TRANSITIONS=222} [2024-06-14 12:18:32,377 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 86 predicate places. [2024-06-14 12:18:32,377 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 222 transitions, 2678 flow [2024-06-14 12:18:32,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:32,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:32,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:32,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:18:32,377 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:32,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1394806500, now seen corresponding path program 3 times [2024-06-14 12:18:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:32,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438998800] [2024-06-14 12:18:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:32,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:33,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:33,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438998800] [2024-06-14 12:18:33,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438998800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:33,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:33,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699565853] [2024-06-14 12:18:33,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:33,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:33,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 222 transitions, 2678 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:33,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:33,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:33,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:34,265 INFO L124 PetriNetUnfolderBase]: 2868/4424 cut-off events. [2024-06-14 12:18:34,265 INFO L125 PetriNetUnfolderBase]: For 95847/95847 co-relation queries the response was YES. [2024-06-14 12:18:34,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27129 conditions, 4424 events. 2868/4424 cut-off events. For 95847/95847 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22841 event pairs, 1201 based on Foata normal form. 6/4428 useless extension candidates. Maximal degree in co-relation 27070. Up to 4157 conditions per place. [2024-06-14 12:18:34,298 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 227 selfloop transitions, 21 changer transitions 0/253 dead transitions. [2024-06-14 12:18:34,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 253 transitions, 3375 flow [2024-06-14 12:18:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:18:34,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 12:18:34,300 INFO L175 Difference]: Start difference. First operand has 132 places, 222 transitions, 2678 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:18:34,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 253 transitions, 3375 flow [2024-06-14 12:18:34,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 253 transitions, 3232 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:34,374 INFO L231 Difference]: Finished difference. Result has 136 places, 228 transitions, 2705 flow [2024-06-14 12:18:34,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=136, PETRI_TRANSITIONS=228} [2024-06-14 12:18:34,375 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 90 predicate places. [2024-06-14 12:18:34,375 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 228 transitions, 2705 flow [2024-06-14 12:18:34,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:34,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:34,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:34,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:18:34,376 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:34,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -532036358, now seen corresponding path program 4 times [2024-06-14 12:18:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:34,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333380088] [2024-06-14 12:18:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:35,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333380088] [2024-06-14 12:18:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333380088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:35,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961449854] [2024-06-14 12:18:35,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:35,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:35,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 228 transitions, 2705 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:35,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:35,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:35,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:36,291 INFO L124 PetriNetUnfolderBase]: 2904/4485 cut-off events. [2024-06-14 12:18:36,291 INFO L125 PetriNetUnfolderBase]: For 94385/94385 co-relation queries the response was YES. [2024-06-14 12:18:36,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26976 conditions, 4485 events. 2904/4485 cut-off events. For 94385/94385 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23258 event pairs, 1203 based on Foata normal form. 6/4489 useless extension candidates. Maximal degree in co-relation 26915. Up to 4170 conditions per place. [2024-06-14 12:18:36,327 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 226 selfloop transitions, 32 changer transitions 0/263 dead transitions. [2024-06-14 12:18:36,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 263 transitions, 3464 flow [2024-06-14 12:18:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:18:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-14 12:18:36,332 INFO L175 Difference]: Start difference. First operand has 136 places, 228 transitions, 2705 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:18:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 263 transitions, 3464 flow [2024-06-14 12:18:36,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 263 transitions, 3352 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:36,421 INFO L231 Difference]: Finished difference. Result has 138 places, 234 transitions, 2796 flow [2024-06-14 12:18:36,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2796, PETRI_PLACES=138, PETRI_TRANSITIONS=234} [2024-06-14 12:18:36,422 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2024-06-14 12:18:36,422 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 234 transitions, 2796 flow [2024-06-14 12:18:36,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:36,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:36,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:36,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:18:36,422 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:36,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:36,422 INFO L85 PathProgramCache]: Analyzing trace with hash -532036575, now seen corresponding path program 5 times [2024-06-14 12:18:36,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:36,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651495256] [2024-06-14 12:18:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:36,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:37,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651495256] [2024-06-14 12:18:37,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651495256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:37,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:37,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185467886] [2024-06-14 12:18:37,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:37,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:37,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 234 transitions, 2796 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) [2024-06-14 12:18:37,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:37,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:37,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:38,194 INFO L124 PetriNetUnfolderBase]: 2893/4470 cut-off events. [2024-06-14 12:18:38,194 INFO L125 PetriNetUnfolderBase]: For 100209/100212 co-relation queries the response was YES. [2024-06-14 12:18:38,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27227 conditions, 4470 events. 2893/4470 cut-off events. For 100209/100212 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23201 event pairs, 1207 based on Foata normal form. 6/4473 useless extension candidates. Maximal degree in co-relation 27166. Up to 4201 conditions per place. [2024-06-14 12:18:38,226 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 221 selfloop transitions, 26 changer transitions 0/252 dead transitions. [2024-06-14 12:18:38,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 252 transitions, 3364 flow [2024-06-14 12:18:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:18:38,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-06-14 12:18:38,228 INFO L175 Difference]: Start difference. First operand has 138 places, 234 transitions, 2796 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:18:38,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 252 transitions, 3364 flow [2024-06-14 12:18:38,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 252 transitions, 3160 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:38,315 INFO L231 Difference]: Finished difference. Result has 139 places, 234 transitions, 2659 flow [2024-06-14 12:18:38,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=139, PETRI_TRANSITIONS=234} [2024-06-14 12:18:38,316 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 93 predicate places. [2024-06-14 12:18:38,316 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 234 transitions, 2659 flow [2024-06-14 12:18:38,316 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) [2024-06-14 12:18:38,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:38,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:38,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:18:38,317 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)] === [2024-06-14 12:18:38,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1402425060, now seen corresponding path program 5 times [2024-06-14 12:18:38,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:38,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220517673] [2024-06-14 12:18:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:38,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:39,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:39,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220517673] [2024-06-14 12:18:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220517673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:39,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:39,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:39,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091136952] [2024-06-14 12:18:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:39,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:39,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 234 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:39,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:39,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:39,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:40,118 INFO L124 PetriNetUnfolderBase]: 2877/4446 cut-off events. [2024-06-14 12:18:40,119 INFO L125 PetriNetUnfolderBase]: For 104524/104524 co-relation queries the response was YES. [2024-06-14 12:18:40,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26938 conditions, 4446 events. 2877/4446 cut-off events. For 104524/104524 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23009 event pairs, 1196 based on Foata normal form. 6/4450 useless extension candidates. Maximal degree in co-relation 26876. Up to 4075 conditions per place. [2024-06-14 12:18:40,152 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 215 selfloop transitions, 50 changer transitions 0/270 dead transitions. [2024-06-14 12:18:40,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 270 transitions, 3468 flow [2024-06-14 12:18:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:18:40,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:18:40,153 INFO L175 Difference]: Start difference. First operand has 139 places, 234 transitions, 2659 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:18:40,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 270 transitions, 3468 flow [2024-06-14 12:18:40,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 270 transitions, 3325 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:40,238 INFO L231 Difference]: Finished difference. Result has 140 places, 240 transitions, 2768 flow [2024-06-14 12:18:40,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2768, PETRI_PLACES=140, PETRI_TRANSITIONS=240} [2024-06-14 12:18:40,238 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2024-06-14 12:18:40,239 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 240 transitions, 2768 flow [2024-06-14 12:18:40,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:40,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:40,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:40,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:18:40,239 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:40,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash -57939261, now seen corresponding path program 1 times [2024-06-14 12:18:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033672121] [2024-06-14 12:18:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033672121] [2024-06-14 12:18:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033672121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:41,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342523196] [2024-06-14 12:18:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:41,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:41,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:18:41,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 240 transitions, 2768 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) [2024-06-14 12:18:41,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:41,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:18:41,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:42,041 INFO L124 PetriNetUnfolderBase]: 3486/5223 cut-off events. [2024-06-14 12:18:42,042 INFO L125 PetriNetUnfolderBase]: For 144113/144121 co-relation queries the response was YES. [2024-06-14 12:18:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32800 conditions, 5223 events. 3486/5223 cut-off events. For 144113/144121 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 26110 event pairs, 1546 based on Foata normal form. 8/5222 useless extension candidates. Maximal degree in co-relation 32737. Up to 5045 conditions per place. [2024-06-14 12:18:42,105 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 214 selfloop transitions, 12 changer transitions 0/251 dead transitions. [2024-06-14 12:18:42,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 251 transitions, 3272 flow [2024-06-14 12:18:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:18:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:18:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 12:18:42,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-06-14 12:18:42,107 INFO L175 Difference]: Start difference. First operand has 140 places, 240 transitions, 2768 flow. Second operand 6 states and 104 transitions. [2024-06-14 12:18:42,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 251 transitions, 3272 flow [2024-06-14 12:18:42,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 251 transitions, 3087 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:42,223 INFO L231 Difference]: Finished difference. Result has 140 places, 243 transitions, 2647 flow [2024-06-14 12:18:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2647, PETRI_PLACES=140, PETRI_TRANSITIONS=243} [2024-06-14 12:18:42,225 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2024-06-14 12:18:42,225 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 243 transitions, 2647 flow [2024-06-14 12:18:42,225 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) [2024-06-14 12:18:42,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:42,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:18:42,226 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:42,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash -919627630, now seen corresponding path program 1 times [2024-06-14 12:18:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701939506] [2024-06-14 12:18:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:43,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701939506] [2024-06-14 12:18:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701939506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:43,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:43,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:43,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458976779] [2024-06-14 12:18:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:43,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:43,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:43,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:43,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 243 transitions, 2647 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) [2024-06-14 12:18:43,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:43,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:43,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:44,288 INFO L124 PetriNetUnfolderBase]: 2885/4507 cut-off events. [2024-06-14 12:18:44,288 INFO L125 PetriNetUnfolderBase]: For 136330/136341 co-relation queries the response was YES. [2024-06-14 12:18:44,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29202 conditions, 4507 events. 2885/4507 cut-off events. For 136330/136341 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 24211 event pairs, 785 based on Foata normal form. 14/4496 useless extension candidates. Maximal degree in co-relation 29138. Up to 3857 conditions per place. [2024-06-14 12:18:44,326 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 203 selfloop transitions, 53 changer transitions 0/284 dead transitions. [2024-06-14 12:18:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 284 transitions, 3441 flow [2024-06-14 12:18:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 12:18:44,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-14 12:18:44,328 INFO L175 Difference]: Start difference. First operand has 140 places, 243 transitions, 2647 flow. Second operand 9 states and 190 transitions. [2024-06-14 12:18:44,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 284 transitions, 3441 flow [2024-06-14 12:18:44,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 284 transitions, 3399 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:44,416 INFO L231 Difference]: Finished difference. Result has 146 places, 250 transitions, 2813 flow [2024-06-14 12:18:44,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2813, PETRI_PLACES=146, PETRI_TRANSITIONS=250} [2024-06-14 12:18:44,417 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 100 predicate places. [2024-06-14 12:18:44,417 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 250 transitions, 2813 flow [2024-06-14 12:18:44,417 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) [2024-06-14 12:18:44,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:44,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:44,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:18:44,418 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:44,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1575942684, now seen corresponding path program 1 times [2024-06-14 12:18:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:44,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928597896] [2024-06-14 12:18:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:45,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928597896] [2024-06-14 12:18:45,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928597896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:45,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:45,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250713270] [2024-06-14 12:18:45,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:45,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:45,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:45,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 250 transitions, 2813 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) [2024-06-14 12:18:45,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:45,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:45,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:46,722 INFO L124 PetriNetUnfolderBase]: 3059/4706 cut-off events. [2024-06-14 12:18:46,722 INFO L125 PetriNetUnfolderBase]: For 144384/144395 co-relation queries the response was YES. [2024-06-14 12:18:46,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30866 conditions, 4706 events. 3059/4706 cut-off events. For 144384/144395 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 24613 event pairs, 828 based on Foata normal form. 10/4713 useless extension candidates. Maximal degree in co-relation 30800. Up to 4032 conditions per place. [2024-06-14 12:18:46,773 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 182 selfloop transitions, 107 changer transitions 0/295 dead transitions. [2024-06-14 12:18:46,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 3693 flow [2024-06-14 12:18:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:18:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:18:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:18:46,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:18:46,775 INFO L175 Difference]: Start difference. First operand has 146 places, 250 transitions, 2813 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:18:46,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 3693 flow [2024-06-14 12:18:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 295 transitions, 3597 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:46,895 INFO L231 Difference]: Finished difference. Result has 152 places, 256 transitions, 3019 flow [2024-06-14 12:18:46,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3019, PETRI_PLACES=152, PETRI_TRANSITIONS=256} [2024-06-14 12:18:46,896 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 106 predicate places. [2024-06-14 12:18:46,896 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 256 transitions, 3019 flow [2024-06-14 12:18:46,896 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) [2024-06-14 12:18:46,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:46,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:46,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:18:46,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:46,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1575942808, now seen corresponding path program 2 times [2024-06-14 12:18:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:46,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262729348] [2024-06-14 12:18:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:48,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:48,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262729348] [2024-06-14 12:18:48,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262729348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:48,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:48,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954404139] [2024-06-14 12:18:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:48,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:48,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:48,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 256 transitions, 3019 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) [2024-06-14 12:18:48,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:48,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:48,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:49,253 INFO L124 PetriNetUnfolderBase]: 2913/4561 cut-off events. [2024-06-14 12:18:49,253 INFO L125 PetriNetUnfolderBase]: For 155653/155664 co-relation queries the response was YES. [2024-06-14 12:18:49,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31065 conditions, 4561 events. 2913/4561 cut-off events. For 155653/155664 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 24487 event pairs, 774 based on Foata normal form. 14/4572 useless extension candidates. Maximal degree in co-relation 30997. Up to 3960 conditions per place. [2024-06-14 12:18:49,295 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 209 selfloop transitions, 53 changer transitions 0/292 dead transitions. [2024-06-14 12:18:49,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 292 transitions, 3683 flow [2024-06-14 12:18:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:18:49,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 12:18:49,297 INFO L175 Difference]: Start difference. First operand has 152 places, 256 transitions, 3019 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:18:49,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 292 transitions, 3683 flow [2024-06-14 12:18:49,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 292 transitions, 3585 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:49,415 INFO L231 Difference]: Finished difference. Result has 156 places, 258 transitions, 3065 flow [2024-06-14 12:18:49,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3065, PETRI_PLACES=156, PETRI_TRANSITIONS=258} [2024-06-14 12:18:49,416 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-06-14 12:18:49,416 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 258 transitions, 3065 flow [2024-06-14 12:18:49,416 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) [2024-06-14 12:18:49,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:49,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:18:49,417 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)] === [2024-06-14 12:18:49,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -518286518, now seen corresponding path program 3 times [2024-06-14 12:18:49,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:49,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571432695] [2024-06-14 12:18:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:49,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:50,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571432695] [2024-06-14 12:18:50,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571432695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:50,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:50,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848793730] [2024-06-14 12:18:50,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:50,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:50,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 258 transitions, 3065 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:50,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:50,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:50,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:51,195 INFO L124 PetriNetUnfolderBase]: 3030/4759 cut-off events. [2024-06-14 12:18:51,196 INFO L125 PetriNetUnfolderBase]: For 168587/168611 co-relation queries the response was YES. [2024-06-14 12:18:51,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32503 conditions, 4759 events. 3030/4759 cut-off events. For 168587/168611 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25969 event pairs, 627 based on Foata normal form. 26/4782 useless extension candidates. Maximal degree in co-relation 32433. Up to 3801 conditions per place. [2024-06-14 12:18:51,230 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 188 selfloop transitions, 89 changer transitions 0/307 dead transitions. [2024-06-14 12:18:51,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 307 transitions, 4087 flow [2024-06-14 12:18:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:18:51,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:18:51,231 INFO L175 Difference]: Start difference. First operand has 156 places, 258 transitions, 3065 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:18:51,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 307 transitions, 4087 flow [2024-06-14 12:18:51,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 307 transitions, 3951 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 12:18:51,373 INFO L231 Difference]: Finished difference. Result has 158 places, 277 transitions, 3378 flow [2024-06-14 12:18:51,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3378, PETRI_PLACES=158, PETRI_TRANSITIONS=277} [2024-06-14 12:18:51,374 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 112 predicate places. [2024-06-14 12:18:51,374 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 277 transitions, 3378 flow [2024-06-14 12:18:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:51,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:51,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:18:51,374 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1809192684, now seen corresponding path program 4 times [2024-06-14 12:18:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440592351] [2024-06-14 12:18:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440592351] [2024-06-14 12:18:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440592351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:52,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:52,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225906926] [2024-06-14 12:18:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:52,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:52,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:52,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:52,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:52,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:52,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 277 transitions, 3378 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:52,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:52,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:53,190 INFO L124 PetriNetUnfolderBase]: 3163/4956 cut-off events. [2024-06-14 12:18:53,191 INFO L125 PetriNetUnfolderBase]: For 189884/189913 co-relation queries the response was YES. [2024-06-14 12:18:53,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35032 conditions, 4956 events. 3163/4956 cut-off events. For 189884/189913 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27349 event pairs, 827 based on Foata normal form. 32/4963 useless extension candidates. Maximal degree in co-relation 34959. Up to 4043 conditions per place. [2024-06-14 12:18:53,244 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 195 selfloop transitions, 96 changer transitions 0/321 dead transitions. [2024-06-14 12:18:53,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 321 transitions, 4441 flow [2024-06-14 12:18:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 12:18:53,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 12:18:53,246 INFO L175 Difference]: Start difference. First operand has 158 places, 277 transitions, 3378 flow. Second operand 8 states and 172 transitions. [2024-06-14 12:18:53,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 321 transitions, 4441 flow [2024-06-14 12:18:53,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 321 transitions, 4215 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:53,436 INFO L231 Difference]: Finished difference. Result has 163 places, 292 transitions, 3688 flow [2024-06-14 12:18:53,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3688, PETRI_PLACES=163, PETRI_TRANSITIONS=292} [2024-06-14 12:18:53,437 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-06-14 12:18:53,437 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 292 transitions, 3688 flow [2024-06-14 12:18:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:53,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:18:53,437 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)] === [2024-06-14 12:18:53,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1839726568, now seen corresponding path program 2 times [2024-06-14 12:18:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394191191] [2024-06-14 12:18:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:54,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394191191] [2024-06-14 12:18:54,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394191191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:54,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:54,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104470160] [2024-06-14 12:18:54,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:54,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:54,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:54,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:54,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 292 transitions, 3688 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:54,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:54,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:55,399 INFO L124 PetriNetUnfolderBase]: 3325/5137 cut-off events. [2024-06-14 12:18:55,399 INFO L125 PetriNetUnfolderBase]: For 194605/194642 co-relation queries the response was YES. [2024-06-14 12:18:55,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36548 conditions, 5137 events. 3325/5137 cut-off events. For 194605/194642 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 27640 event pairs, 891 based on Foata normal form. 34/5168 useless extension candidates. Maximal degree in co-relation 36473. Up to 4321 conditions per place. [2024-06-14 12:18:55,445 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 210 selfloop transitions, 114 changer transitions 0/330 dead transitions. [2024-06-14 12:18:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 330 transitions, 4804 flow [2024-06-14 12:18:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 12:18:55,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-14 12:18:55,446 INFO L175 Difference]: Start difference. First operand has 163 places, 292 transitions, 3688 flow. Second operand 8 states and 172 transitions. [2024-06-14 12:18:55,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 330 transitions, 4804 flow [2024-06-14 12:18:55,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 330 transitions, 4681 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:55,596 INFO L231 Difference]: Finished difference. Result has 167 places, 302 transitions, 4001 flow [2024-06-14 12:18:55,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=167, PETRI_TRANSITIONS=302} [2024-06-14 12:18:55,596 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2024-06-14 12:18:55,596 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 302 transitions, 4001 flow [2024-06-14 12:18:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:55,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:55,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:18:55,597 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)] === [2024-06-14 12:18:55,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1809253134, now seen corresponding path program 5 times [2024-06-14 12:18:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793521883] [2024-06-14 12:18:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:56,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:56,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793521883] [2024-06-14 12:18:56,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793521883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:56,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:56,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964975015] [2024-06-14 12:18:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:56,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:56,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 302 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:56,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:56,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:56,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:57,721 INFO L124 PetriNetUnfolderBase]: 3174/4986 cut-off events. [2024-06-14 12:18:57,722 INFO L125 PetriNetUnfolderBase]: For 196294/196331 co-relation queries the response was YES. [2024-06-14 12:18:57,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36430 conditions, 4986 events. 3174/4986 cut-off events. For 196294/196331 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27498 event pairs, 830 based on Foata normal form. 40/5023 useless extension candidates. Maximal degree in co-relation 36353. Up to 4263 conditions per place. [2024-06-14 12:18:57,767 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 219 selfloop transitions, 77 changer transitions 0/329 dead transitions. [2024-06-14 12:18:57,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 329 transitions, 4723 flow [2024-06-14 12:18:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:18:57,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:18:57,769 INFO L175 Difference]: Start difference. First operand has 167 places, 302 transitions, 4001 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:18:57,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 329 transitions, 4723 flow [2024-06-14 12:18:57,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 329 transitions, 4651 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:57,933 INFO L231 Difference]: Finished difference. Result has 171 places, 304 transitions, 4138 flow [2024-06-14 12:18:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3929, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4138, PETRI_PLACES=171, PETRI_TRANSITIONS=304} [2024-06-14 12:18:57,934 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2024-06-14 12:18:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 304 transitions, 4138 flow [2024-06-14 12:18:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:57,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:57,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:18:57,935 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1614832412, now seen corresponding path program 3 times [2024-06-14 12:18:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750261578] [2024-06-14 12:18:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:57,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750261578] [2024-06-14 12:18:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750261578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455342379] [2024-06-14 12:18:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:59,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:59,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:18:59,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 304 transitions, 4138 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) [2024-06-14 12:18:59,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:59,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:18:59,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:00,283 INFO L124 PetriNetUnfolderBase]: 3368/5206 cut-off events. [2024-06-14 12:19:00,284 INFO L125 PetriNetUnfolderBase]: For 195855/195870 co-relation queries the response was YES. [2024-06-14 12:19:00,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37848 conditions, 5206 events. 3368/5206 cut-off events. For 195855/195870 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28191 event pairs, 905 based on Foata normal form. 14/5217 useless extension candidates. Maximal degree in co-relation 37770. Up to 4576 conditions per place. [2024-06-14 12:19:00,330 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 238 selfloop transitions, 106 changer transitions 0/350 dead transitions. [2024-06-14 12:19:00,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 350 transitions, 5241 flow [2024-06-14 12:19:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:19:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:19:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 12:19:00,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-06-14 12:19:00,332 INFO L175 Difference]: Start difference. First operand has 171 places, 304 transitions, 4138 flow. Second operand 10 states and 204 transitions. [2024-06-14 12:19:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 350 transitions, 5241 flow [2024-06-14 12:19:00,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 350 transitions, 5058 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:00,534 INFO L231 Difference]: Finished difference. Result has 176 places, 314 transitions, 4356 flow [2024-06-14 12:19:00,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4356, PETRI_PLACES=176, PETRI_TRANSITIONS=314} [2024-06-14 12:19:00,534 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2024-06-14 12:19:00,535 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 314 transitions, 4356 flow [2024-06-14 12:19:00,535 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) [2024-06-14 12:19:00,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:00,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:00,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:19:00,535 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1815596678, now seen corresponding path program 1 times [2024-06-14 12:19:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:00,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044682735] [2024-06-14 12:19:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:01,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:01,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044682735] [2024-06-14 12:19:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044682735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:01,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:01,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208334143] [2024-06-14 12:19:01,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:01,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:01,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 314 transitions, 4356 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) [2024-06-14 12:19:01,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:01,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:01,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:02,691 INFO L124 PetriNetUnfolderBase]: 3410/5266 cut-off events. [2024-06-14 12:19:02,691 INFO L125 PetriNetUnfolderBase]: For 209327/209342 co-relation queries the response was YES. [2024-06-14 12:19:02,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38782 conditions, 5266 events. 3410/5266 cut-off events. For 209327/209342 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28571 event pairs, 904 based on Foata normal form. 16/5279 useless extension candidates. Maximal degree in co-relation 38702. Up to 4396 conditions per place. [2024-06-14 12:19:02,742 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 245 selfloop transitions, 114 changer transitions 0/365 dead transitions. [2024-06-14 12:19:02,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 365 transitions, 5668 flow [2024-06-14 12:19:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 12:19:02,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47901234567901235 [2024-06-14 12:19:02,745 INFO L175 Difference]: Start difference. First operand has 176 places, 314 transitions, 4356 flow. Second operand 9 states and 194 transitions. [2024-06-14 12:19:02,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 365 transitions, 5668 flow [2024-06-14 12:19:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 365 transitions, 5530 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:02,979 INFO L231 Difference]: Finished difference. Result has 180 places, 324 transitions, 4649 flow [2024-06-14 12:19:02,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4649, PETRI_PLACES=180, PETRI_TRANSITIONS=324} [2024-06-14 12:19:02,980 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 134 predicate places. [2024-06-14 12:19:02,980 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 324 transitions, 4649 flow [2024-06-14 12:19:02,980 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) [2024-06-14 12:19:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:02,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:19:02,980 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:02,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1815417188, now seen corresponding path program 2 times [2024-06-14 12:19:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501788189] [2024-06-14 12:19:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:03,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501788189] [2024-06-14 12:19:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501788189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:03,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590891396] [2024-06-14 12:19:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:03,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 324 transitions, 4649 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) [2024-06-14 12:19:03,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:03,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:03,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:05,177 INFO L124 PetriNetUnfolderBase]: 3514/5428 cut-off events. [2024-06-14 12:19:05,178 INFO L125 PetriNetUnfolderBase]: For 226034/226057 co-relation queries the response was YES. [2024-06-14 12:19:05,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41029 conditions, 5428 events. 3514/5428 cut-off events. For 226034/226057 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29638 event pairs, 890 based on Foata normal form. 24/5449 useless extension candidates. Maximal degree in co-relation 40946. Up to 4478 conditions per place. [2024-06-14 12:19:05,229 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 250 selfloop transitions, 124 changer transitions 0/380 dead transitions. [2024-06-14 12:19:05,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 380 transitions, 6130 flow [2024-06-14 12:19:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 12:19:05,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:19:05,230 INFO L175 Difference]: Start difference. First operand has 180 places, 324 transitions, 4649 flow. Second operand 9 states and 192 transitions. [2024-06-14 12:19:05,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 380 transitions, 6130 flow [2024-06-14 12:19:05,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 380 transitions, 5940 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:05,495 INFO L231 Difference]: Finished difference. Result has 185 places, 340 transitions, 5001 flow [2024-06-14 12:19:05,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5001, PETRI_PLACES=185, PETRI_TRANSITIONS=340} [2024-06-14 12:19:05,495 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2024-06-14 12:19:05,495 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 340 transitions, 5001 flow [2024-06-14 12:19:05,496 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) [2024-06-14 12:19:05,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:05,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:19:05,496 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:05,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1640572952, now seen corresponding path program 4 times [2024-06-14 12:19:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:05,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863416012] [2024-06-14 12:19:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863416012] [2024-06-14 12:19:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863416012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:06,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:06,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911742972] [2024-06-14 12:19:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:06,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:06,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 340 transitions, 5001 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) [2024-06-14 12:19:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:07,847 INFO L124 PetriNetUnfolderBase]: 3519/5439 cut-off events. [2024-06-14 12:19:07,848 INFO L125 PetriNetUnfolderBase]: For 237888/237911 co-relation queries the response was YES. [2024-06-14 12:19:07,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41603 conditions, 5439 events. 3519/5439 cut-off events. For 237888/237911 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29671 event pairs, 913 based on Foata normal form. 22/5458 useless extension candidates. Maximal degree in co-relation 41518. Up to 4833 conditions per place. [2024-06-14 12:19:07,906 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 270 selfloop transitions, 95 changer transitions 0/371 dead transitions. [2024-06-14 12:19:07,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 371 transitions, 5894 flow [2024-06-14 12:19:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:19:07,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:19:07,907 INFO L175 Difference]: Start difference. First operand has 185 places, 340 transitions, 5001 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:19:07,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 371 transitions, 5894 flow [2024-06-14 12:19:08,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 371 transitions, 5668 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:08,203 INFO L231 Difference]: Finished difference. Result has 189 places, 343 transitions, 5028 flow [2024-06-14 12:19:08,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5028, PETRI_PLACES=189, PETRI_TRANSITIONS=343} [2024-06-14 12:19:08,204 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 143 predicate places. [2024-06-14 12:19:08,204 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 343 transitions, 5028 flow [2024-06-14 12:19:08,204 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) [2024-06-14 12:19:08,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:08,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:08,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:19:08,205 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:08,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1640572766, now seen corresponding path program 3 times [2024-06-14 12:19:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:08,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276502758] [2024-06-14 12:19:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276502758] [2024-06-14 12:19:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276502758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:09,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070682919] [2024-06-14 12:19:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:09,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:09,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 343 transitions, 5028 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) [2024-06-14 12:19:09,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:09,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:09,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:10,477 INFO L124 PetriNetUnfolderBase]: 3509/5421 cut-off events. [2024-06-14 12:19:10,477 INFO L125 PetriNetUnfolderBase]: For 249006/249029 co-relation queries the response was YES. [2024-06-14 12:19:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41453 conditions, 5421 events. 3509/5421 cut-off events. For 249006/249029 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29514 event pairs, 888 based on Foata normal form. 24/5442 useless extension candidates. Maximal degree in co-relation 41367. Up to 4477 conditions per place. [2024-06-14 12:19:10,527 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 255 selfloop transitions, 122 changer transitions 0/383 dead transitions. [2024-06-14 12:19:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 383 transitions, 6221 flow [2024-06-14 12:19:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 12:19:10,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765432098765432 [2024-06-14 12:19:10,528 INFO L175 Difference]: Start difference. First operand has 189 places, 343 transitions, 5028 flow. Second operand 9 states and 193 transitions. [2024-06-14 12:19:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 383 transitions, 6221 flow [2024-06-14 12:19:10,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 383 transitions, 6013 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:10,831 INFO L231 Difference]: Finished difference. Result has 191 places, 343 transitions, 5072 flow [2024-06-14 12:19:10,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5072, PETRI_PLACES=191, PETRI_TRANSITIONS=343} [2024-06-14 12:19:10,831 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 145 predicate places. [2024-06-14 12:19:10,831 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 343 transitions, 5072 flow [2024-06-14 12:19:10,832 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) [2024-06-14 12:19:10,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:10,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:10,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:19:10,832 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)] === [2024-06-14 12:19:10,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1874536236, now seen corresponding path program 1 times [2024-06-14 12:19:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265832849] [2024-06-14 12:19:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:10,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:11,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:11,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265832849] [2024-06-14 12:19:11,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265832849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:11,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:11,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:19:11,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136660872] [2024-06-14 12:19:11,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:11,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:19:11,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:19:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:19:11,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:11,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 343 transitions, 5072 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:11,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:11,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:12,598 INFO L124 PetriNetUnfolderBase]: 3918/5999 cut-off events. [2024-06-14 12:19:12,598 INFO L125 PetriNetUnfolderBase]: For 296425/296430 co-relation queries the response was YES. [2024-06-14 12:19:12,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46221 conditions, 5999 events. 3918/5999 cut-off events. For 296425/296430 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32203 event pairs, 1432 based on Foata normal form. 6/5999 useless extension candidates. Maximal degree in co-relation 46134. Up to 5578 conditions per place. [2024-06-14 12:19:12,655 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 313 selfloop transitions, 21 changer transitions 0/369 dead transitions. [2024-06-14 12:19:12,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 369 transitions, 6008 flow [2024-06-14 12:19:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:19:12,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43174603174603177 [2024-06-14 12:19:12,656 INFO L175 Difference]: Start difference. First operand has 191 places, 343 transitions, 5072 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:19:12,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 369 transitions, 6008 flow [2024-06-14 12:19:13,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 369 transitions, 5772 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:13,030 INFO L231 Difference]: Finished difference. Result has 193 places, 351 transitions, 5038 flow [2024-06-14 12:19:13,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5038, PETRI_PLACES=193, PETRI_TRANSITIONS=351} [2024-06-14 12:19:13,031 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2024-06-14 12:19:13,031 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 351 transitions, 5038 flow [2024-06-14 12:19:13,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:13,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:13,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:19:13,032 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:13,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1196830248, now seen corresponding path program 6 times [2024-06-14 12:19:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002378717] [2024-06-14 12:19:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:14,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002378717] [2024-06-14 12:19:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002378717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:14,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:14,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375419111] [2024-06-14 12:19:14,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:14,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:14,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 351 transitions, 5038 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) [2024-06-14 12:19:14,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:14,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:14,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:15,412 INFO L124 PetriNetUnfolderBase]: 3477/5396 cut-off events. [2024-06-14 12:19:15,412 INFO L125 PetriNetUnfolderBase]: For 290982/291062 co-relation queries the response was YES. [2024-06-14 12:19:15,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42834 conditions, 5396 events. 3477/5396 cut-off events. For 290982/291062 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29996 event pairs, 838 based on Foata normal form. 40/5393 useless extension candidates. Maximal degree in co-relation 42745. Up to 4270 conditions per place. [2024-06-14 12:19:15,472 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 231 selfloop transitions, 119 changer transitions 0/386 dead transitions. [2024-06-14 12:19:15,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 386 transitions, 6066 flow [2024-06-14 12:19:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:19:15,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:19:15,475 INFO L175 Difference]: Start difference. First operand has 193 places, 351 transitions, 5038 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:19:15,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 386 transitions, 6066 flow [2024-06-14 12:19:15,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 386 transitions, 6019 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 12:19:15,832 INFO L231 Difference]: Finished difference. Result has 199 places, 355 transitions, 5325 flow [2024-06-14 12:19:15,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5325, PETRI_PLACES=199, PETRI_TRANSITIONS=355} [2024-06-14 12:19:15,832 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 153 predicate places. [2024-06-14 12:19:15,833 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 355 transitions, 5325 flow [2024-06-14 12:19:15,833 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) [2024-06-14 12:19:15,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:15,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:19:15,833 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)] === [2024-06-14 12:19:15,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1609581361, now seen corresponding path program 1 times [2024-06-14 12:19:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:15,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731715487] [2024-06-14 12:19:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731715487] [2024-06-14 12:19:16,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731715487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:16,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:16,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901857739] [2024-06-14 12:19:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:17,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:17,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 355 transitions, 5325 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) [2024-06-14 12:19:17,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:17,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:17,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:18,589 INFO L124 PetriNetUnfolderBase]: 3627/5596 cut-off events. [2024-06-14 12:19:18,589 INFO L125 PetriNetUnfolderBase]: For 293563/293586 co-relation queries the response was YES. [2024-06-14 12:19:18,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44410 conditions, 5596 events. 3627/5596 cut-off events. For 293563/293586 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30672 event pairs, 1124 based on Foata normal form. 24/5617 useless extension candidates. Maximal degree in co-relation 44319. Up to 4364 conditions per place. [2024-06-14 12:19:18,639 INFO L140 encePairwiseOnDemand]: 29/45 looper letters, 262 selfloop transitions, 151 changer transitions 0/419 dead transitions. [2024-06-14 12:19:18,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 419 transitions, 6842 flow [2024-06-14 12:19:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:19:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:19:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-14 12:19:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547008547008547 [2024-06-14 12:19:18,641 INFO L175 Difference]: Start difference. First operand has 199 places, 355 transitions, 5325 flow. Second operand 13 states and 266 transitions. [2024-06-14 12:19:18,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 419 transitions, 6842 flow [2024-06-14 12:19:18,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 419 transitions, 6604 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:18,953 INFO L231 Difference]: Finished difference. Result has 206 places, 361 transitions, 5508 flow [2024-06-14 12:19:18,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5508, PETRI_PLACES=206, PETRI_TRANSITIONS=361} [2024-06-14 12:19:18,953 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 160 predicate places. [2024-06-14 12:19:18,954 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 361 transitions, 5508 flow [2024-06-14 12:19:18,954 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) [2024-06-14 12:19:18,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:18,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:18,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:19:18,954 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:18,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1184474658, now seen corresponding path program 7 times [2024-06-14 12:19:18,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:18,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246076455] [2024-06-14 12:19:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:20,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:20,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246076455] [2024-06-14 12:19:20,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246076455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:20,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:20,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146203557] [2024-06-14 12:19:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:20,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:20,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:20,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 361 transitions, 5508 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) [2024-06-14 12:19:20,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:20,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:21,489 INFO L124 PetriNetUnfolderBase]: 3451/5395 cut-off events. [2024-06-14 12:19:21,489 INFO L125 PetriNetUnfolderBase]: For 282814/282857 co-relation queries the response was YES. [2024-06-14 12:19:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43099 conditions, 5395 events. 3451/5395 cut-off events. For 282814/282857 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30135 event pairs, 1031 based on Foata normal form. 38/5419 useless extension candidates. Maximal degree in co-relation 43008. Up to 4573 conditions per place. [2024-06-14 12:19:21,538 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 262 selfloop transitions, 96 changer transitions 0/394 dead transitions. [2024-06-14 12:19:21,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 394 transitions, 6388 flow [2024-06-14 12:19:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 12:19:21,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:19:21,540 INFO L175 Difference]: Start difference. First operand has 206 places, 361 transitions, 5508 flow. Second operand 9 states and 186 transitions. [2024-06-14 12:19:21,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 394 transitions, 6388 flow [2024-06-14 12:19:21,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 394 transitions, 6215 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:21,905 INFO L231 Difference]: Finished difference. Result has 207 places, 361 transitions, 5556 flow [2024-06-14 12:19:21,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5556, PETRI_PLACES=207, PETRI_TRANSITIONS=361} [2024-06-14 12:19:21,905 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2024-06-14 12:19:21,905 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 361 transitions, 5556 flow [2024-06-14 12:19:21,906 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) [2024-06-14 12:19:21,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:21,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:19:21,906 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:21,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1935996697, now seen corresponding path program 2 times [2024-06-14 12:19:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756155076] [2024-06-14 12:19:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756155076] [2024-06-14 12:19:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756155076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:23,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:23,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:23,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274385177] [2024-06-14 12:19:23,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:23,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:23,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 361 transitions, 5556 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) [2024-06-14 12:19:23,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:23,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:24,225 INFO L124 PetriNetUnfolderBase]: 3702/5694 cut-off events. [2024-06-14 12:19:24,225 INFO L125 PetriNetUnfolderBase]: For 294403/294440 co-relation queries the response was YES. [2024-06-14 12:19:24,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45395 conditions, 5694 events. 3702/5694 cut-off events. For 294403/294440 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31282 event pairs, 1076 based on Foata normal form. 32/5711 useless extension candidates. Maximal degree in co-relation 45302. Up to 4115 conditions per place. [2024-06-14 12:19:24,285 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 223 selfloop transitions, 195 changer transitions 0/424 dead transitions. [2024-06-14 12:19:24,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 424 transitions, 7301 flow [2024-06-14 12:19:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 12:19:24,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765432098765432 [2024-06-14 12:19:24,287 INFO L175 Difference]: Start difference. First operand has 207 places, 361 transitions, 5556 flow. Second operand 9 states and 193 transitions. [2024-06-14 12:19:24,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 424 transitions, 7301 flow [2024-06-14 12:19:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 424 transitions, 7040 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:24,650 INFO L231 Difference]: Finished difference. Result has 210 places, 382 transitions, 6152 flow [2024-06-14 12:19:24,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6152, PETRI_PLACES=210, PETRI_TRANSITIONS=382} [2024-06-14 12:19:24,651 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 164 predicate places. [2024-06-14 12:19:24,651 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 382 transitions, 6152 flow [2024-06-14 12:19:24,651 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) [2024-06-14 12:19:24,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:24,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:19:24,651 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:24,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1429314184, now seen corresponding path program 5 times [2024-06-14 12:19:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531360961] [2024-06-14 12:19:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:25,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:25,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531360961] [2024-06-14 12:19:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531360961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:25,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176323887] [2024-06-14 12:19:25,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:25,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:25,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:25,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:25,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:25,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 382 transitions, 6152 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) [2024-06-14 12:19:25,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:25,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:25,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:26,904 INFO L124 PetriNetUnfolderBase]: 3685/5667 cut-off events. [2024-06-14 12:19:26,904 INFO L125 PetriNetUnfolderBase]: For 280494/280527 co-relation queries the response was YES. [2024-06-14 12:19:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46200 conditions, 5667 events. 3685/5667 cut-off events. For 280494/280527 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31070 event pairs, 1059 based on Foata normal form. 31/5691 useless extension candidates. Maximal degree in co-relation 46104. Up to 4797 conditions per place. [2024-06-14 12:19:26,966 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 260 selfloop transitions, 146 changer transitions 0/412 dead transitions. [2024-06-14 12:19:26,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 412 transitions, 7234 flow [2024-06-14 12:19:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:19:26,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:19:26,968 INFO L175 Difference]: Start difference. First operand has 210 places, 382 transitions, 6152 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:19:26,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 412 transitions, 7234 flow [2024-06-14 12:19:27,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 412 transitions, 7077 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:27,286 INFO L231 Difference]: Finished difference. Result has 215 places, 382 transitions, 6307 flow [2024-06-14 12:19:27,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6307, PETRI_PLACES=215, PETRI_TRANSITIONS=382} [2024-06-14 12:19:27,287 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 169 predicate places. [2024-06-14 12:19:27,287 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 382 transitions, 6307 flow [2024-06-14 12:19:27,287 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) [2024-06-14 12:19:27,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:27,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:19:27,288 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:27,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -732241206, now seen corresponding path program 6 times [2024-06-14 12:19:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657155154] [2024-06-14 12:19:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:28,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:28,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657155154] [2024-06-14 12:19:28,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657155154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:28,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:28,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389608842] [2024-06-14 12:19:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:28,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:28,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:28,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:28,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 382 transitions, 6307 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) [2024-06-14 12:19:28,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:28,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:28,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:29,937 INFO L124 PetriNetUnfolderBase]: 3721/5727 cut-off events. [2024-06-14 12:19:29,938 INFO L125 PetriNetUnfolderBase]: For 295691/295714 co-relation queries the response was YES. [2024-06-14 12:19:29,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47059 conditions, 5727 events. 3721/5727 cut-off events. For 295691/295714 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31505 event pairs, 1098 based on Foata normal form. 24/5744 useless extension candidates. Maximal degree in co-relation 46961. Up to 5097 conditions per place. [2024-06-14 12:19:29,989 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 307 selfloop transitions, 108 changer transitions 0/421 dead transitions. [2024-06-14 12:19:29,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 421 transitions, 7512 flow [2024-06-14 12:19:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:19:29,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:19:29,991 INFO L175 Difference]: Start difference. First operand has 215 places, 382 transitions, 6307 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:19:29,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 421 transitions, 7512 flow [2024-06-14 12:19:30,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 421 transitions, 7226 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:30,293 INFO L231 Difference]: Finished difference. Result has 216 places, 394 transitions, 6497 flow [2024-06-14 12:19:30,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6497, PETRI_PLACES=216, PETRI_TRANSITIONS=394} [2024-06-14 12:19:30,294 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2024-06-14 12:19:30,294 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 394 transitions, 6497 flow [2024-06-14 12:19:30,294 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) [2024-06-14 12:19:30,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:30,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:30,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:19:30,295 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:30,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -732245856, now seen corresponding path program 7 times [2024-06-14 12:19:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:30,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300902213] [2024-06-14 12:19:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:31,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:31,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300902213] [2024-06-14 12:19:31,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300902213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:31,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:31,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464223779] [2024-06-14 12:19:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:31,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:31,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 394 transitions, 6497 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) [2024-06-14 12:19:31,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:31,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:31,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:32,648 INFO L124 PetriNetUnfolderBase]: 3746/5765 cut-off events. [2024-06-14 12:19:32,648 INFO L125 PetriNetUnfolderBase]: For 309678/309701 co-relation queries the response was YES. [2024-06-14 12:19:32,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47607 conditions, 5765 events. 3746/5765 cut-off events. For 309678/309701 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31786 event pairs, 1098 based on Foata normal form. 24/5782 useless extension candidates. Maximal degree in co-relation 47509. Up to 5080 conditions per place. [2024-06-14 12:19:32,707 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 297 selfloop transitions, 129 changer transitions 0/432 dead transitions. [2024-06-14 12:19:32,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 432 transitions, 7704 flow [2024-06-14 12:19:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:19:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:19:32,708 INFO L175 Difference]: Start difference. First operand has 216 places, 394 transitions, 6497 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:19:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 432 transitions, 7704 flow [2024-06-14 12:19:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 432 transitions, 7426 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:33,081 INFO L231 Difference]: Finished difference. Result has 218 places, 403 transitions, 6691 flow [2024-06-14 12:19:33,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6691, PETRI_PLACES=218, PETRI_TRANSITIONS=403} [2024-06-14 12:19:33,082 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 172 predicate places. [2024-06-14 12:19:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 403 transitions, 6691 flow [2024-06-14 12:19:33,082 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) [2024-06-14 12:19:33,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:33,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:19:33,082 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:33,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash -616954686, now seen corresponding path program 8 times [2024-06-14 12:19:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568889779] [2024-06-14 12:19:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:33,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:34,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568889779] [2024-06-14 12:19:34,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568889779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:34,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:34,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228149749] [2024-06-14 12:19:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:34,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:34,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:34,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 403 transitions, 6691 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) [2024-06-14 12:19:34,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:34,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:35,531 INFO L124 PetriNetUnfolderBase]: 3782/5798 cut-off events. [2024-06-14 12:19:35,531 INFO L125 PetriNetUnfolderBase]: For 322193/322218 co-relation queries the response was YES. [2024-06-14 12:19:35,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 5798 events. 3782/5798 cut-off events. For 322193/322218 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31797 event pairs, 1061 based on Foata normal form. 24/5815 useless extension candidates. Maximal degree in co-relation 48316. Up to 5052 conditions per place. [2024-06-14 12:19:35,593 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 298 selfloop transitions, 146 changer transitions 0/450 dead transitions. [2024-06-14 12:19:35,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 450 transitions, 8156 flow [2024-06-14 12:19:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:19:35,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:19:35,594 INFO L175 Difference]: Start difference. First operand has 218 places, 403 transitions, 6691 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:19:35,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 450 transitions, 8156 flow [2024-06-14 12:19:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 450 transitions, 7814 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:35,953 INFO L231 Difference]: Finished difference. Result has 220 places, 415 transitions, 6893 flow [2024-06-14 12:19:35,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6893, PETRI_PLACES=220, PETRI_TRANSITIONS=415} [2024-06-14 12:19:35,954 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 174 predicate places. [2024-06-14 12:19:35,954 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 415 transitions, 6893 flow [2024-06-14 12:19:35,954 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) [2024-06-14 12:19:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:35,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:35,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:19:35,955 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:35,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash -616770360, now seen corresponding path program 4 times [2024-06-14 12:19:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:35,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443513163] [2024-06-14 12:19:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:36,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443513163] [2024-06-14 12:19:36,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443513163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:36,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669964760] [2024-06-14 12:19:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:36,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:36,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:37,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:37,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 415 transitions, 6893 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) [2024-06-14 12:19:37,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:37,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:37,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:38,223 INFO L124 PetriNetUnfolderBase]: 3904/5997 cut-off events. [2024-06-14 12:19:38,224 INFO L125 PetriNetUnfolderBase]: For 352296/352319 co-relation queries the response was YES. [2024-06-14 12:19:38,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50737 conditions, 5997 events. 3904/5997 cut-off events. For 352296/352319 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33214 event pairs, 1069 based on Foata normal form. 28/6018 useless extension candidates. Maximal degree in co-relation 50637. Up to 4892 conditions per place. [2024-06-14 12:19:38,287 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 298 selfloop transitions, 169 changer transitions 0/473 dead transitions. [2024-06-14 12:19:38,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 473 transitions, 8853 flow [2024-06-14 12:19:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 12:19:38,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-14 12:19:38,291 INFO L175 Difference]: Start difference. First operand has 220 places, 415 transitions, 6893 flow. Second operand 8 states and 169 transitions. [2024-06-14 12:19:38,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 473 transitions, 8853 flow [2024-06-14 12:19:38,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 473 transitions, 8424 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:38,731 INFO L231 Difference]: Finished difference. Result has 222 places, 437 transitions, 7359 flow [2024-06-14 12:19:38,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7359, PETRI_PLACES=222, PETRI_TRANSITIONS=437} [2024-06-14 12:19:38,731 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 176 predicate places. [2024-06-14 12:19:38,731 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 437 transitions, 7359 flow [2024-06-14 12:19:38,731 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) [2024-06-14 12:19:38,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:38,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:38,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:19:38,732 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)] === [2024-06-14 12:19:38,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash -616949850, now seen corresponding path program 5 times [2024-06-14 12:19:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:38,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906125316] [2024-06-14 12:19:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:38,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906125316] [2024-06-14 12:19:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906125316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976862012] [2024-06-14 12:19:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:39,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:39,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:39,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 437 transitions, 7359 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) [2024-06-14 12:19:39,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:39,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:41,009 INFO L124 PetriNetUnfolderBase]: 3934/6036 cut-off events. [2024-06-14 12:19:41,009 INFO L125 PetriNetUnfolderBase]: For 367242/367257 co-relation queries the response was YES. [2024-06-14 12:19:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51541 conditions, 6036 events. 3934/6036 cut-off events. For 367242/367257 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33507 event pairs, 1096 based on Foata normal form. 20/6049 useless extension candidates. Maximal degree in co-relation 51440. Up to 4919 conditions per place. [2024-06-14 12:19:41,085 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 293 selfloop transitions, 184 changer transitions 0/483 dead transitions. [2024-06-14 12:19:41,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 483 transitions, 8914 flow [2024-06-14 12:19:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 12:19:41,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 12:19:41,087 INFO L175 Difference]: Start difference. First operand has 222 places, 437 transitions, 7359 flow. Second operand 8 states and 171 transitions. [2024-06-14 12:19:41,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 483 transitions, 8914 flow [2024-06-14 12:19:41,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 483 transitions, 8468 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:41,636 INFO L231 Difference]: Finished difference. Result has 225 places, 445 transitions, 7514 flow [2024-06-14 12:19:41,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6955, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7514, PETRI_PLACES=225, PETRI_TRANSITIONS=445} [2024-06-14 12:19:41,637 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 179 predicate places. [2024-06-14 12:19:41,637 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 445 transitions, 7514 flow [2024-06-14 12:19:41,637 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) [2024-06-14 12:19:41,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:41,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:41,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:19:41,637 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)] === [2024-06-14 12:19:41,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash -616777056, now seen corresponding path program 9 times [2024-06-14 12:19:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:41,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895597954] [2024-06-14 12:19:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:41,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895597954] [2024-06-14 12:19:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895597954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:42,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:42,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311890660] [2024-06-14 12:19:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:42,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:42,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:42,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:43,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:43,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 445 transitions, 7514 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) [2024-06-14 12:19:43,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:43,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:44,212 INFO L124 PetriNetUnfolderBase]: 3966/6087 cut-off events. [2024-06-14 12:19:44,213 INFO L125 PetriNetUnfolderBase]: For 365695/365718 co-relation queries the response was YES. [2024-06-14 12:19:44,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51742 conditions, 6087 events. 3966/6087 cut-off events. For 365695/365718 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33821 event pairs, 1124 based on Foata normal form. 25/6105 useless extension candidates. Maximal degree in co-relation 51641. Up to 5447 conditions per place. [2024-06-14 12:19:44,279 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 367 selfloop transitions, 111 changer transitions 0/484 dead transitions. [2024-06-14 12:19:44,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 484 transitions, 8881 flow [2024-06-14 12:19:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:19:44,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:19:44,280 INFO L175 Difference]: Start difference. First operand has 225 places, 445 transitions, 7514 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:19:44,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 484 transitions, 8881 flow [2024-06-14 12:19:44,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 484 transitions, 8428 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:44,825 INFO L231 Difference]: Finished difference. Result has 227 places, 457 transitions, 7590 flow [2024-06-14 12:19:44,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7061, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7590, PETRI_PLACES=227, PETRI_TRANSITIONS=457} [2024-06-14 12:19:44,826 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 181 predicate places. [2024-06-14 12:19:44,826 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 457 transitions, 7590 flow [2024-06-14 12:19:44,826 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) [2024-06-14 12:19:44,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:44,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:19:44,827 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)] === [2024-06-14 12:19:44,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -616776870, now seen corresponding path program 6 times [2024-06-14 12:19:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306882986] [2024-06-14 12:19:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:44,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306882986] [2024-06-14 12:19:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306882986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:45,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:45,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908946735] [2024-06-14 12:19:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:45,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:45,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 457 transitions, 7590 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) [2024-06-14 12:19:45,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:45,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:45,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:47,148 INFO L124 PetriNetUnfolderBase]: 3944/6060 cut-off events. [2024-06-14 12:19:47,149 INFO L125 PetriNetUnfolderBase]: For 357965/357988 co-relation queries the response was YES. [2024-06-14 12:19:47,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50844 conditions, 6060 events. 3944/6060 cut-off events. For 357965/357988 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33634 event pairs, 1068 based on Foata normal form. 28/6081 useless extension candidates. Maximal degree in co-relation 50743. Up to 4947 conditions per place. [2024-06-14 12:19:47,218 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 316 selfloop transitions, 173 changer transitions 0/495 dead transitions. [2024-06-14 12:19:47,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 495 transitions, 8953 flow [2024-06-14 12:19:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 12:19:47,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-14 12:19:47,220 INFO L175 Difference]: Start difference. First operand has 227 places, 457 transitions, 7590 flow. Second operand 8 states and 169 transitions. [2024-06-14 12:19:47,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 495 transitions, 8953 flow [2024-06-14 12:19:47,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 495 transitions, 8545 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:47,766 INFO L231 Difference]: Finished difference. Result has 230 places, 457 transitions, 7554 flow [2024-06-14 12:19:47,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7554, PETRI_PLACES=230, PETRI_TRANSITIONS=457} [2024-06-14 12:19:47,767 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 184 predicate places. [2024-06-14 12:19:47,767 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 457 transitions, 7554 flow [2024-06-14 12:19:47,767 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) [2024-06-14 12:19:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:19:47,768 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)] === [2024-06-14 12:19:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -616950036, now seen corresponding path program 10 times [2024-06-14 12:19:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:47,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850041398] [2024-06-14 12:19:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:47,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:49,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:49,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850041398] [2024-06-14 12:19:49,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850041398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:49,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:49,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003511480] [2024-06-14 12:19:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:49,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:49,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:49,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 457 transitions, 7554 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) [2024-06-14 12:19:49,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:49,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:49,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:50,365 INFO L124 PetriNetUnfolderBase]: 3969/6099 cut-off events. [2024-06-14 12:19:50,365 INFO L125 PetriNetUnfolderBase]: For 354646/354661 co-relation queries the response was YES. [2024-06-14 12:19:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51339 conditions, 6099 events. 3969/6099 cut-off events. For 354646/354661 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33917 event pairs, 1113 based on Foata normal form. 16/6108 useless extension candidates. Maximal degree in co-relation 51237. Up to 5455 conditions per place. [2024-06-14 12:19:50,437 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 375 selfloop transitions, 115 changer transitions 0/496 dead transitions. [2024-06-14 12:19:50,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 496 transitions, 8931 flow [2024-06-14 12:19:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:19:50,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-14 12:19:50,438 INFO L175 Difference]: Start difference. First operand has 230 places, 457 transitions, 7554 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:19:50,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 496 transitions, 8931 flow [2024-06-14 12:19:51,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 496 transitions, 8510 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:51,017 INFO L231 Difference]: Finished difference. Result has 230 places, 466 transitions, 7613 flow [2024-06-14 12:19:51,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=230, PETRI_TRANSITIONS=466} [2024-06-14 12:19:51,018 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 184 predicate places. [2024-06-14 12:19:51,018 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 466 transitions, 7613 flow [2024-06-14 12:19:51,018 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) [2024-06-14 12:19:51,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:51,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:51,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:19:51,018 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:51,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1855541546, now seen corresponding path program 2 times [2024-06-14 12:19:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293633460] [2024-06-14 12:19:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:51,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:51,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293633460] [2024-06-14 12:19:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293633460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:51,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:51,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:19:51,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017555970] [2024-06-14 12:19:51,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:51,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:19:51,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:51,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:19:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:19:51,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:51,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 466 transitions, 7613 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:51,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:51,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:51,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:53,139 INFO L124 PetriNetUnfolderBase]: 4442/6767 cut-off events. [2024-06-14 12:19:53,139 INFO L125 PetriNetUnfolderBase]: For 401801/401808 co-relation queries the response was YES. [2024-06-14 12:19:53,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 6767 events. 4442/6767 cut-off events. For 401801/401808 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36976 event pairs, 1524 based on Foata normal form. 8/6763 useless extension candidates. Maximal degree in co-relation 56191. Up to 6272 conditions per place. [2024-06-14 12:19:53,224 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 404 selfloop transitions, 23 changer transitions 0/483 dead transitions. [2024-06-14 12:19:53,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 483 transitions, 8650 flow [2024-06-14 12:19:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:19:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:19:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:19:53,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:19:53,225 INFO L175 Difference]: Start difference. First operand has 230 places, 466 transitions, 7613 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:19:53,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 483 transitions, 8650 flow [2024-06-14 12:19:53,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 483 transitions, 8312 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:53,801 INFO L231 Difference]: Finished difference. Result has 230 places, 469 transitions, 7380 flow [2024-06-14 12:19:53,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7275, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7380, PETRI_PLACES=230, PETRI_TRANSITIONS=469} [2024-06-14 12:19:53,802 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 184 predicate places. [2024-06-14 12:19:53,802 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 469 transitions, 7380 flow [2024-06-14 12:19:53,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:53,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:53,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:53,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:19:53,802 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)] === [2024-06-14 12:19:53,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1881364798, now seen corresponding path program 7 times [2024-06-14 12:19:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865945535] [2024-06-14 12:19:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:54,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865945535] [2024-06-14 12:19:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865945535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:54,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:54,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081608141] [2024-06-14 12:19:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:54,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:54,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:54,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 469 transitions, 7380 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) [2024-06-14 12:19:54,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:54,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:54,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:56,156 INFO L124 PetriNetUnfolderBase]: 4096/6295 cut-off events. [2024-06-14 12:19:56,156 INFO L125 PetriNetUnfolderBase]: For 383022/383025 co-relation queries the response was YES. [2024-06-14 12:19:56,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52788 conditions, 6295 events. 4096/6295 cut-off events. For 383022/383025 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35264 event pairs, 1430 based on Foata normal form. 10/6298 useless extension candidates. Maximal degree in co-relation 52685. Up to 5722 conditions per place. [2024-06-14 12:19:56,234 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 450 selfloop transitions, 71 changer transitions 0/527 dead transitions. [2024-06-14 12:19:56,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 527 transitions, 9495 flow [2024-06-14 12:19:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:19:56,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:19:56,235 INFO L175 Difference]: Start difference. First operand has 230 places, 469 transitions, 7380 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:19:56,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 527 transitions, 9495 flow [2024-06-14 12:19:56,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 527 transitions, 9425 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:19:56,712 INFO L231 Difference]: Finished difference. Result has 234 places, 491 transitions, 8027 flow [2024-06-14 12:19:56,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8027, PETRI_PLACES=234, PETRI_TRANSITIONS=491} [2024-06-14 12:19:56,713 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-06-14 12:19:56,713 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 491 transitions, 8027 flow [2024-06-14 12:19:56,713 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) [2024-06-14 12:19:56,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:56,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:56,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:19:56,713 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:56,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash -297608076, now seen corresponding path program 11 times [2024-06-14 12:19:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:56,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151624465] [2024-06-14 12:19:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:57,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:57,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151624465] [2024-06-14 12:19:57,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151624465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:57,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:57,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932014124] [2024-06-14 12:19:57,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:57,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:57,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:19:57,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 491 transitions, 8027 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) [2024-06-14 12:19:57,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:57,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:19:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:59,121 INFO L124 PetriNetUnfolderBase]: 4082/6272 cut-off events. [2024-06-14 12:19:59,121 INFO L125 PetriNetUnfolderBase]: For 378029/378032 co-relation queries the response was YES. [2024-06-14 12:19:59,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52668 conditions, 6272 events. 4082/6272 cut-off events. For 378029/378032 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35145 event pairs, 1442 based on Foata normal form. 7/6271 useless extension candidates. Maximal degree in co-relation 52565. Up to 5892 conditions per place. [2024-06-14 12:19:59,200 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 469 selfloop transitions, 38 changer transitions 0/513 dead transitions. [2024-06-14 12:19:59,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 513 transitions, 9156 flow [2024-06-14 12:19:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:19:59,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 12:19:59,201 INFO L175 Difference]: Start difference. First operand has 234 places, 491 transitions, 8027 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:19:59,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 513 transitions, 9156 flow [2024-06-14 12:19:59,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 513 transitions, 8717 flow, removed 142 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:59,650 INFO L231 Difference]: Finished difference. Result has 237 places, 491 transitions, 7683 flow [2024-06-14 12:19:59,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7588, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7683, PETRI_PLACES=237, PETRI_TRANSITIONS=491} [2024-06-14 12:19:59,651 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 191 predicate places. [2024-06-14 12:19:59,651 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 491 transitions, 7683 flow [2024-06-14 12:19:59,651 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) [2024-06-14 12:19:59,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:59,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:59,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:19:59,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:59,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash -289327170, now seen corresponding path program 8 times [2024-06-14 12:19:59,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:59,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797318669] [2024-06-14 12:19:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:00,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:00,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797318669] [2024-06-14 12:20:00,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797318669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:00,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:00,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:00,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110251247] [2024-06-14 12:20:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:00,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 491 transitions, 7683 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) [2024-06-14 12:20:00,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:00,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:00,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:01,904 INFO L124 PetriNetUnfolderBase]: 4060/6244 cut-off events. [2024-06-14 12:20:01,905 INFO L125 PetriNetUnfolderBase]: For 381017/381020 co-relation queries the response was YES. [2024-06-14 12:20:01,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51796 conditions, 6244 events. 4060/6244 cut-off events. For 381017/381020 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34937 event pairs, 1438 based on Foata normal form. 10/6247 useless extension candidates. Maximal degree in co-relation 51692. Up to 5833 conditions per place. [2024-06-14 12:20:01,976 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 481 selfloop transitions, 32 changer transitions 0/519 dead transitions. [2024-06-14 12:20:01,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 519 transitions, 8855 flow [2024-06-14 12:20:01,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:20:01,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:20:01,981 INFO L175 Difference]: Start difference. First operand has 237 places, 491 transitions, 7683 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:20:01,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 519 transitions, 8855 flow [2024-06-14 12:20:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 519 transitions, 8557 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:02,500 INFO L231 Difference]: Finished difference. Result has 238 places, 491 transitions, 7466 flow [2024-06-14 12:20:02,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7466, PETRI_PLACES=238, PETRI_TRANSITIONS=491} [2024-06-14 12:20:02,500 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2024-06-14 12:20:02,501 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 491 transitions, 7466 flow [2024-06-14 12:20:02,501 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) [2024-06-14 12:20:02,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:02,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:02,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:20:02,501 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:02,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash -297607890, now seen corresponding path program 9 times [2024-06-14 12:20:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:02,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790690754] [2024-06-14 12:20:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:03,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:03,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790690754] [2024-06-14 12:20:03,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790690754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:03,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:03,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921611591] [2024-06-14 12:20:03,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:03,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:03,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:03,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 491 transitions, 7466 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) [2024-06-14 12:20:03,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:03,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:03,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:04,756 INFO L124 PetriNetUnfolderBase]: 4038/6214 cut-off events. [2024-06-14 12:20:04,757 INFO L125 PetriNetUnfolderBase]: For 386678/386681 co-relation queries the response was YES. [2024-06-14 12:20:04,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51302 conditions, 6214 events. 4038/6214 cut-off events. For 386678/386681 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34800 event pairs, 1410 based on Foata normal form. 10/6217 useless extension candidates. Maximal degree in co-relation 51197. Up to 5667 conditions per place. [2024-06-14 12:20:04,827 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 445 selfloop transitions, 73 changer transitions 0/524 dead transitions. [2024-06-14 12:20:04,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 524 transitions, 8713 flow [2024-06-14 12:20:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:20:04,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-14 12:20:04,829 INFO L175 Difference]: Start difference. First operand has 238 places, 491 transitions, 7466 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:20:04,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 524 transitions, 8713 flow [2024-06-14 12:20:05,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 524 transitions, 8495 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:05,284 INFO L231 Difference]: Finished difference. Result has 239 places, 491 transitions, 7412 flow [2024-06-14 12:20:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7248, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7412, PETRI_PLACES=239, PETRI_TRANSITIONS=491} [2024-06-14 12:20:05,284 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 193 predicate places. [2024-06-14 12:20:05,285 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 491 transitions, 7412 flow [2024-06-14 12:20:05,285 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) [2024-06-14 12:20:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:20:05,285 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:05,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1113554308, now seen corresponding path program 3 times [2024-06-14 12:20:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177556046] [2024-06-14 12:20:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:06,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:06,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177556046] [2024-06-14 12:20:06,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177556046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:06,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295490220] [2024-06-14 12:20:06,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:06,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:06,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:06,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 491 transitions, 7412 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:06,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:06,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:06,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:07,467 INFO L124 PetriNetUnfolderBase]: 4536/6917 cut-off events. [2024-06-14 12:20:07,467 INFO L125 PetriNetUnfolderBase]: For 450963/450974 co-relation queries the response was YES. [2024-06-14 12:20:07,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56912 conditions, 6917 events. 4536/6917 cut-off events. For 450963/450974 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38033 event pairs, 1702 based on Foata normal form. 12/6907 useless extension candidates. Maximal degree in co-relation 56806. Up to 6445 conditions per place. [2024-06-14 12:20:07,551 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 431 selfloop transitions, 12 changer transitions 0/499 dead transitions. [2024-06-14 12:20:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 499 transitions, 8326 flow [2024-06-14 12:20:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:20:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:20:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:20:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-14 12:20:07,552 INFO L175 Difference]: Start difference. First operand has 239 places, 491 transitions, 7412 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:20:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 499 transitions, 8326 flow [2024-06-14 12:20:08,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 499 transitions, 7927 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:08,126 INFO L231 Difference]: Finished difference. Result has 236 places, 491 transitions, 7043 flow [2024-06-14 12:20:08,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7013, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7043, PETRI_PLACES=236, PETRI_TRANSITIONS=491} [2024-06-14 12:20:08,126 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 190 predicate places. [2024-06-14 12:20:08,126 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 491 transitions, 7043 flow [2024-06-14 12:20:08,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:08,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:08,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:08,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:20:08,127 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:08,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1105941700, now seen corresponding path program 1 times [2024-06-14 12:20:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:08,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564193013] [2024-06-14 12:20:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564193013] [2024-06-14 12:20:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564193013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:08,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:08,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692612406] [2024-06-14 12:20:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:08,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:08,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 491 transitions, 7043 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:08,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:08,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:08,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:10,276 INFO L124 PetriNetUnfolderBase]: 4541/6924 cut-off events. [2024-06-14 12:20:10,277 INFO L125 PetriNetUnfolderBase]: For 460933/460944 co-relation queries the response was YES. [2024-06-14 12:20:10,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56692 conditions, 6924 events. 4541/6924 cut-off events. For 460933/460944 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38066 event pairs, 1702 based on Foata normal form. 12/6914 useless extension candidates. Maximal degree in co-relation 56585. Up to 6439 conditions per place. [2024-06-14 12:20:10,360 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 436 selfloop transitions, 17 changer transitions 0/509 dead transitions. [2024-06-14 12:20:10,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 509 transitions, 8151 flow [2024-06-14 12:20:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:20:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:20:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:20:10,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:20:10,361 INFO L175 Difference]: Start difference. First operand has 236 places, 491 transitions, 7043 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:20:10,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 509 transitions, 8151 flow [2024-06-14 12:20:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 509 transitions, 8113 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:11,035 INFO L231 Difference]: Finished difference. Result has 237 places, 497 transitions, 7115 flow [2024-06-14 12:20:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7005, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7115, PETRI_PLACES=237, PETRI_TRANSITIONS=497} [2024-06-14 12:20:11,035 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 191 predicate places. [2024-06-14 12:20:11,035 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 497 transitions, 7115 flow [2024-06-14 12:20:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:11,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:11,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:20:11,036 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1749334446, now seen corresponding path program 2 times [2024-06-14 12:20:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850962768] [2024-06-14 12:20:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850962768] [2024-06-14 12:20:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850962768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:11,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147082475] [2024-06-14 12:20:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:11,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:11,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 497 transitions, 7115 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:11,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:11,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:11,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:13,227 INFO L124 PetriNetUnfolderBase]: 4538/6920 cut-off events. [2024-06-14 12:20:13,228 INFO L125 PetriNetUnfolderBase]: For 478266/478280 co-relation queries the response was YES. [2024-06-14 12:20:13,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57413 conditions, 6920 events. 4538/6920 cut-off events. For 478266/478280 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38081 event pairs, 1705 based on Foata normal form. 14/6911 useless extension candidates. Maximal degree in co-relation 57305. Up to 6436 conditions per place. [2024-06-14 12:20:13,314 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 432 selfloop transitions, 17 changer transitions 0/505 dead transitions. [2024-06-14 12:20:13,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 505 transitions, 8041 flow [2024-06-14 12:20:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:20:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:20:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:20:13,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-14 12:20:13,315 INFO L175 Difference]: Start difference. First operand has 237 places, 497 transitions, 7115 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:20:13,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 505 transitions, 8041 flow [2024-06-14 12:20:13,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 505 transitions, 7986 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:20:13,979 INFO L231 Difference]: Finished difference. Result has 241 places, 497 transitions, 7100 flow [2024-06-14 12:20:13,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7100, PETRI_PLACES=241, PETRI_TRANSITIONS=497} [2024-06-14 12:20:13,980 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 195 predicate places. [2024-06-14 12:20:13,980 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 497 transitions, 7100 flow [2024-06-14 12:20:13,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:13,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:13,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:20:13,981 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)] === [2024-06-14 12:20:13,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash -289019340, now seen corresponding path program 1 times [2024-06-14 12:20:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969923371] [2024-06-14 12:20:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:15,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969923371] [2024-06-14 12:20:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969923371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:20:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206198247] [2024-06-14 12:20:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:20:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:20:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:20:15,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:20:15,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 497 transitions, 7100 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:15,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:15,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:20:15,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:17,051 INFO L124 PetriNetUnfolderBase]: 4715/7097 cut-off events. [2024-06-14 12:20:17,051 INFO L125 PetriNetUnfolderBase]: For 488155/488155 co-relation queries the response was YES. [2024-06-14 12:20:17,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58496 conditions, 7097 events. 4715/7097 cut-off events. For 488155/488155 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38108 event pairs, 1744 based on Foata normal form. 4/7095 useless extension candidates. Maximal degree in co-relation 58386. Up to 6804 conditions per place. [2024-06-14 12:20:17,143 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 502 selfloop transitions, 22 changer transitions 0/529 dead transitions. [2024-06-14 12:20:17,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 529 transitions, 8330 flow [2024-06-14 12:20:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:20:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2024-06-14 12:20:17,145 INFO L175 Difference]: Start difference. First operand has 241 places, 497 transitions, 7100 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:20:17,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 529 transitions, 8330 flow [2024-06-14 12:20:17,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 529 transitions, 8277 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:17,823 INFO L231 Difference]: Finished difference. Result has 245 places, 502 transitions, 7174 flow [2024-06-14 12:20:17,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7174, PETRI_PLACES=245, PETRI_TRANSITIONS=502} [2024-06-14 12:20:17,824 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 199 predicate places. [2024-06-14 12:20:17,824 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 502 transitions, 7174 flow [2024-06-14 12:20:17,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:17,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:17,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:17,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:20:17,825 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:17,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1113570180, now seen corresponding path program 1 times [2024-06-14 12:20:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:17,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029267716] [2024-06-14 12:20:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:17,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:18,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:18,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029267716] [2024-06-14 12:20:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029267716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:18,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:20:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024266590] [2024-06-14 12:20:18,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:20:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:20:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:20:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:20:18,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 502 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:20:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:20,254 INFO L124 PetriNetUnfolderBase]: 4709/7091 cut-off events. [2024-06-14 12:20:20,254 INFO L125 PetriNetUnfolderBase]: For 508624/508635 co-relation queries the response was YES. [2024-06-14 12:20:20,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59068 conditions, 7091 events. 4709/7091 cut-off events. For 508624/508635 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38055 event pairs, 1776 based on Foata normal form. 14/7087 useless extension candidates. Maximal degree in co-relation 58957. Up to 6746 conditions per place. [2024-06-14 12:20:20,348 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 447 selfloop transitions, 15 changer transitions 0/516 dead transitions. [2024-06-14 12:20:20,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 516 transitions, 8168 flow [2024-06-14 12:20:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:20:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:20:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:20:20,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-14 12:20:20,350 INFO L175 Difference]: Start difference. First operand has 245 places, 502 transitions, 7174 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:20:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 516 transitions, 8168 flow [2024-06-14 12:20:20,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 516 transitions, 8091 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:20,917 INFO L231 Difference]: Finished difference. Result has 246 places, 505 transitions, 7175 flow [2024-06-14 12:20:20,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7097, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7175, PETRI_PLACES=246, PETRI_TRANSITIONS=505} [2024-06-14 12:20:20,918 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 200 predicate places. [2024-06-14 12:20:20,918 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 505 transitions, 7175 flow [2024-06-14 12:20:20,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:20,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:20,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:20,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:20:20,918 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)] === [2024-06-14 12:20:20,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -12422914, now seen corresponding path program 1 times [2024-06-14 12:20:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170135715] [2024-06-14 12:20:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:21,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:21,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170135715] [2024-06-14 12:20:21,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170135715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:21,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:21,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303148598] [2024-06-14 12:20:21,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:21,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:21,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 505 transitions, 7175 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:21,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:23,319 INFO L124 PetriNetUnfolderBase]: 4329/6652 cut-off events. [2024-06-14 12:20:23,320 INFO L125 PetriNetUnfolderBase]: For 509508/509540 co-relation queries the response was YES. [2024-06-14 12:20:23,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57005 conditions, 6652 events. 4329/6652 cut-off events. For 509508/509540 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37017 event pairs, 843 based on Foata normal form. 30/6679 useless extension candidates. Maximal degree in co-relation 56893. Up to 4931 conditions per place. [2024-06-14 12:20:23,395 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 331 selfloop transitions, 209 changer transitions 0/547 dead transitions. [2024-06-14 12:20:23,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 547 transitions, 8793 flow [2024-06-14 12:20:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:20:23,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2024-06-14 12:20:23,396 INFO L175 Difference]: Start difference. First operand has 246 places, 505 transitions, 7175 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:20:23,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 547 transitions, 8793 flow [2024-06-14 12:20:24,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 547 transitions, 8737 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:24,078 INFO L231 Difference]: Finished difference. Result has 251 places, 512 transitions, 7733 flow [2024-06-14 12:20:24,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7119, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7733, PETRI_PLACES=251, PETRI_TRANSITIONS=512} [2024-06-14 12:20:24,078 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 205 predicate places. [2024-06-14 12:20:24,078 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 512 transitions, 7733 flow [2024-06-14 12:20:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:24,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:24,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:24,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:20:24,079 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:24,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash 250399912, now seen corresponding path program 2 times [2024-06-14 12:20:24,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:24,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313486102] [2024-06-14 12:20:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:24,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313486102] [2024-06-14 12:20:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313486102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:24,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790750295] [2024-06-14 12:20:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:25,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:25,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 512 transitions, 7733 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:25,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:25,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:26,510 INFO L124 PetriNetUnfolderBase]: 4409/6775 cut-off events. [2024-06-14 12:20:26,510 INFO L125 PetriNetUnfolderBase]: For 546636/546668 co-relation queries the response was YES. [2024-06-14 12:20:26,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59594 conditions, 6775 events. 4409/6775 cut-off events. For 546636/546668 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 37998 event pairs, 1051 based on Foata normal form. 32/6799 useless extension candidates. Maximal degree in co-relation 59480. Up to 5288 conditions per place. [2024-06-14 12:20:26,600 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 335 selfloop transitions, 215 changer transitions 0/557 dead transitions. [2024-06-14 12:20:26,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 557 transitions, 9385 flow [2024-06-14 12:20:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 12:20:26,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:20:26,601 INFO L175 Difference]: Start difference. First operand has 251 places, 512 transitions, 7733 flow. Second operand 9 states and 186 transitions. [2024-06-14 12:20:26,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 557 transitions, 9385 flow [2024-06-14 12:20:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 557 transitions, 9012 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:27,300 INFO L231 Difference]: Finished difference. Result has 256 places, 522 transitions, 8050 flow [2024-06-14 12:20:27,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7474, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8050, PETRI_PLACES=256, PETRI_TRANSITIONS=522} [2024-06-14 12:20:27,301 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 210 predicate places. [2024-06-14 12:20:27,301 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 522 transitions, 8050 flow [2024-06-14 12:20:27,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:27,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:27,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:27,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:20:27,301 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:27,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:27,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1196950192, now seen corresponding path program 3 times [2024-06-14 12:20:27,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:27,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535638727] [2024-06-14 12:20:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:28,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535638727] [2024-06-14 12:20:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535638727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:28,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427944605] [2024-06-14 12:20:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:28,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:28,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 522 transitions, 8050 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:28,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:30,129 INFO L124 PetriNetUnfolderBase]: 4437/6817 cut-off events. [2024-06-14 12:20:30,130 INFO L125 PetriNetUnfolderBase]: For 562545/562577 co-relation queries the response was YES. [2024-06-14 12:20:30,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60538 conditions, 6817 events. 4437/6817 cut-off events. For 562545/562577 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38175 event pairs, 1079 based on Foata normal form. 32/6846 useless extension candidates. Maximal degree in co-relation 60422. Up to 5804 conditions per place. [2024-06-14 12:20:30,217 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 353 selfloop transitions, 195 changer transitions 0/555 dead transitions. [2024-06-14 12:20:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 555 transitions, 9321 flow [2024-06-14 12:20:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:20:30,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 12:20:30,219 INFO L175 Difference]: Start difference. First operand has 256 places, 522 transitions, 8050 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:20:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 555 transitions, 9321 flow [2024-06-14 12:20:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 555 transitions, 9077 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:31,200 INFO L231 Difference]: Finished difference. Result has 260 places, 526 transitions, 8278 flow [2024-06-14 12:20:31,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8278, PETRI_PLACES=260, PETRI_TRANSITIONS=526} [2024-06-14 12:20:31,201 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 214 predicate places. [2024-06-14 12:20:31,201 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 526 transitions, 8278 flow [2024-06-14 12:20:31,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:31,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:31,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:31,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:20:31,201 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:31,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1166559652, now seen corresponding path program 4 times [2024-06-14 12:20:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99749926] [2024-06-14 12:20:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99749926] [2024-06-14 12:20:32,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99749926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:32,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:32,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:32,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312438384] [2024-06-14 12:20:32,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:32,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:32,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:32,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:32,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 526 transitions, 8278 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:32,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:32,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:32,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:34,003 INFO L124 PetriNetUnfolderBase]: 4465/6863 cut-off events. [2024-06-14 12:20:34,003 INFO L125 PetriNetUnfolderBase]: For 583944/583976 co-relation queries the response was YES. [2024-06-14 12:20:34,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61807 conditions, 6863 events. 4465/6863 cut-off events. For 583944/583976 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38508 event pairs, 1079 based on Foata normal form. 32/6892 useless extension candidates. Maximal degree in co-relation 61689. Up to 5741 conditions per place. [2024-06-14 12:20:34,073 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 351 selfloop transitions, 203 changer transitions 0/561 dead transitions. [2024-06-14 12:20:34,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 561 transitions, 9577 flow [2024-06-14 12:20:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:20:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 12:20:34,075 INFO L175 Difference]: Start difference. First operand has 260 places, 526 transitions, 8278 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:20:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 561 transitions, 9577 flow [2024-06-14 12:20:34,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 561 transitions, 9159 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:34,684 INFO L231 Difference]: Finished difference. Result has 262 places, 530 transitions, 8356 flow [2024-06-14 12:20:34,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8356, PETRI_PLACES=262, PETRI_TRANSITIONS=530} [2024-06-14 12:20:34,684 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 216 predicate places. [2024-06-14 12:20:34,684 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 530 transitions, 8356 flow [2024-06-14 12:20:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:34,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:34,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:20:34,685 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1756895802, now seen corresponding path program 1 times [2024-06-14 12:20:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521259770] [2024-06-14 12:20:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:35,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521259770] [2024-06-14 12:20:35,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521259770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:35,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:35,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:20:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306306833] [2024-06-14 12:20:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:20:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:20:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:20:35,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:35,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 530 transitions, 8356 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:35,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:35,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:35,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:37,136 INFO L124 PetriNetUnfolderBase]: 4727/7212 cut-off events. [2024-06-14 12:20:37,136 INFO L125 PetriNetUnfolderBase]: For 618633/618651 co-relation queries the response was YES. [2024-06-14 12:20:37,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64711 conditions, 7212 events. 4727/7212 cut-off events. For 618633/618651 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40005 event pairs, 1418 based on Foata normal form. 19/7219 useless extension candidates. Maximal degree in co-relation 64592. Up to 6403 conditions per place. [2024-06-14 12:20:37,224 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 441 selfloop transitions, 64 changer transitions 0/573 dead transitions. [2024-06-14 12:20:37,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 573 transitions, 9986 flow [2024-06-14 12:20:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:20:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 12:20:37,225 INFO L175 Difference]: Start difference. First operand has 262 places, 530 transitions, 8356 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:20:37,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 573 transitions, 9986 flow [2024-06-14 12:20:37,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 573 transitions, 9538 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:37,859 INFO L231 Difference]: Finished difference. Result has 266 places, 548 transitions, 8446 flow [2024-06-14 12:20:37,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8446, PETRI_PLACES=266, PETRI_TRANSITIONS=548} [2024-06-14 12:20:37,860 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 220 predicate places. [2024-06-14 12:20:37,860 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 548 transitions, 8446 flow [2024-06-14 12:20:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:37,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:37,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:20:37,860 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:37,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 676337222, now seen corresponding path program 5 times [2024-06-14 12:20:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402829565] [2024-06-14 12:20:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:37,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402829565] [2024-06-14 12:20:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402829565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838272510] [2024-06-14 12:20:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:39,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:39,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:39,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 548 transitions, 8446 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) [2024-06-14 12:20:39,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:39,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:39,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:40,831 INFO L124 PetriNetUnfolderBase]: 4581/7053 cut-off events. [2024-06-14 12:20:40,832 INFO L125 PetriNetUnfolderBase]: For 631907/631920 co-relation queries the response was YES. [2024-06-14 12:20:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64510 conditions, 7053 events. 4581/7053 cut-off events. For 631907/631920 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40043 event pairs, 1266 based on Foata normal form. 16/7066 useless extension candidates. Maximal degree in co-relation 64387. Up to 6173 conditions per place. [2024-06-14 12:20:40,921 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 459 selfloop transitions, 133 changer transitions 0/599 dead transitions. [2024-06-14 12:20:40,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 599 transitions, 10197 flow [2024-06-14 12:20:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:20:40,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:20:40,923 INFO L175 Difference]: Start difference. First operand has 266 places, 548 transitions, 8446 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:20:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 599 transitions, 10197 flow [2024-06-14 12:20:41,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 599 transitions, 10118 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 12:20:41,651 INFO L231 Difference]: Finished difference. Result has 275 places, 559 transitions, 8873 flow [2024-06-14 12:20:41,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8367, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8873, PETRI_PLACES=275, PETRI_TRANSITIONS=559} [2024-06-14 12:20:41,652 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 229 predicate places. [2024-06-14 12:20:41,652 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 559 transitions, 8873 flow [2024-06-14 12:20:41,652 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) [2024-06-14 12:20:41,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:41,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:41,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:20:41,652 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:41,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 676340942, now seen corresponding path program 6 times [2024-06-14 12:20:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:41,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656746341] [2024-06-14 12:20:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656746341] [2024-06-14 12:20:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656746341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:42,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500643507] [2024-06-14 12:20:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:43,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 559 transitions, 8873 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) [2024-06-14 12:20:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:44,811 INFO L124 PetriNetUnfolderBase]: 4609/7099 cut-off events. [2024-06-14 12:20:44,811 INFO L125 PetriNetUnfolderBase]: For 655463/655476 co-relation queries the response was YES. [2024-06-14 12:20:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65689 conditions, 7099 events. 4609/7099 cut-off events. For 655463/655476 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40406 event pairs, 1281 based on Foata normal form. 16/7112 useless extension candidates. Maximal degree in co-relation 65563. Up to 6327 conditions per place. [2024-06-14 12:20:44,907 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 469 selfloop transitions, 126 changer transitions 0/602 dead transitions. [2024-06-14 12:20:44,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 602 transitions, 10322 flow [2024-06-14 12:20:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-14 12:20:44,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2024-06-14 12:20:44,908 INFO L175 Difference]: Start difference. First operand has 275 places, 559 transitions, 8873 flow. Second operand 11 states and 219 transitions. [2024-06-14 12:20:44,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 602 transitions, 10322 flow [2024-06-14 12:20:45,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 602 transitions, 10122 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:45,911 INFO L231 Difference]: Finished difference. Result has 280 places, 563 transitions, 9033 flow [2024-06-14 12:20:45,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8673, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9033, PETRI_PLACES=280, PETRI_TRANSITIONS=563} [2024-06-14 12:20:45,912 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 234 predicate places. [2024-06-14 12:20:45,912 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 563 transitions, 9033 flow [2024-06-14 12:20:45,912 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) [2024-06-14 12:20:45,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:45,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:45,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:20:45,913 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -449070499, now seen corresponding path program 3 times [2024-06-14 12:20:45,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:45,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511632312] [2024-06-14 12:20:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511632312] [2024-06-14 12:20:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511632312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:47,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:47,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:47,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423719146] [2024-06-14 12:20:47,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:47,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:47,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:47,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:47,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:47,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 563 transitions, 9033 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) [2024-06-14 12:20:47,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:47,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:47,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:49,086 INFO L124 PetriNetUnfolderBase]: 4651/7153 cut-off events. [2024-06-14 12:20:49,086 INFO L125 PetriNetUnfolderBase]: For 677534/677547 co-relation queries the response was YES. [2024-06-14 12:20:49,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66862 conditions, 7153 events. 4651/7153 cut-off events. For 677534/677547 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40684 event pairs, 1259 based on Foata normal form. 14/7162 useless extension candidates. Maximal degree in co-relation 66734. Up to 5876 conditions per place. [2024-06-14 12:20:49,184 INFO L140 encePairwiseOnDemand]: 29/45 looper letters, 417 selfloop transitions, 198 changer transitions 0/622 dead transitions. [2024-06-14 12:20:49,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 622 transitions, 10821 flow [2024-06-14 12:20:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:20:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:20:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 12:20:49,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:20:49,185 INFO L175 Difference]: Start difference. First operand has 280 places, 563 transitions, 9033 flow. Second operand 12 states and 248 transitions. [2024-06-14 12:20:49,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 622 transitions, 10821 flow [2024-06-14 12:20:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 622 transitions, 10523 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:50,303 INFO L231 Difference]: Finished difference. Result has 283 places, 569 transitions, 9235 flow [2024-06-14 12:20:50,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8735, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9235, PETRI_PLACES=283, PETRI_TRANSITIONS=569} [2024-06-14 12:20:50,304 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 237 predicate places. [2024-06-14 12:20:50,304 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 569 transitions, 9235 flow [2024-06-14 12:20:50,304 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) [2024-06-14 12:20:50,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:50,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:20:50,305 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:50,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 682055017, now seen corresponding path program 4 times [2024-06-14 12:20:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:50,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645846436] [2024-06-14 12:20:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:51,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:51,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645846436] [2024-06-14 12:20:51,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645846436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:51,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113445789] [2024-06-14 12:20:51,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:51,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:51,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 569 transitions, 9235 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) [2024-06-14 12:20:51,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:51,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:51,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:53,755 INFO L124 PetriNetUnfolderBase]: 4673/7192 cut-off events. [2024-06-14 12:20:53,755 INFO L125 PetriNetUnfolderBase]: For 702266/702289 co-relation queries the response was YES. [2024-06-14 12:20:53,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67812 conditions, 7192 events. 4673/7192 cut-off events. For 702266/702289 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40970 event pairs, 1254 based on Foata normal form. 24/7213 useless extension candidates. Maximal degree in co-relation 67683. Up to 6061 conditions per place. [2024-06-14 12:20:53,859 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 433 selfloop transitions, 172 changer transitions 0/612 dead transitions. [2024-06-14 12:20:53,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 612 transitions, 10695 flow [2024-06-14 12:20:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:20:53,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 12:20:53,860 INFO L175 Difference]: Start difference. First operand has 283 places, 569 transitions, 9235 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:20:53,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 612 transitions, 10695 flow [2024-06-14 12:20:54,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 612 transitions, 10449 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:54,987 INFO L231 Difference]: Finished difference. Result has 285 places, 572 transitions, 9397 flow [2024-06-14 12:20:54,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9397, PETRI_PLACES=285, PETRI_TRANSITIONS=572} [2024-06-14 12:20:54,987 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 239 predicate places. [2024-06-14 12:20:54,988 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 572 transitions, 9397 flow [2024-06-14 12:20:54,988 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) [2024-06-14 12:20:54,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:54,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:54,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:20:54,988 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:54,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 681847472, now seen corresponding path program 7 times [2024-06-14 12:20:54,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:54,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528707042] [2024-06-14 12:20:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:54,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:56,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528707042] [2024-06-14 12:20:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528707042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:56,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805529109] [2024-06-14 12:20:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:56,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:56,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:20:56,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 572 transitions, 9397 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) [2024-06-14 12:20:56,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:56,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:20:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:58,470 INFO L124 PetriNetUnfolderBase]: 4676/7196 cut-off events. [2024-06-14 12:20:58,470 INFO L125 PetriNetUnfolderBase]: For 721242/721265 co-relation queries the response was YES. [2024-06-14 12:20:58,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68645 conditions, 7196 events. 4676/7196 cut-off events. For 721242/721265 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41049 event pairs, 1288 based on Foata normal form. 26/7219 useless extension candidates. Maximal degree in co-relation 68514. Up to 6483 conditions per place. [2024-06-14 12:20:58,566 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 495 selfloop transitions, 105 changer transitions 0/607 dead transitions. [2024-06-14 12:20:58,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 607 transitions, 10788 flow [2024-06-14 12:20:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:20:58,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2024-06-14 12:20:58,567 INFO L175 Difference]: Start difference. First operand has 285 places, 572 transitions, 9397 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:20:58,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 607 transitions, 10788 flow [2024-06-14 12:20:59,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 607 transitions, 10422 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:59,621 INFO L231 Difference]: Finished difference. Result has 287 places, 574 transitions, 9304 flow [2024-06-14 12:20:59,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9031, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9304, PETRI_PLACES=287, PETRI_TRANSITIONS=574} [2024-06-14 12:20:59,622 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 241 predicate places. [2024-06-14 12:20:59,622 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 574 transitions, 9304 flow [2024-06-14 12:20:59,622 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) [2024-06-14 12:20:59,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:59,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:20:59,622 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 681853207, now seen corresponding path program 5 times [2024-06-14 12:20:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922028211] [2024-06-14 12:20:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922028211] [2024-06-14 12:21:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922028211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:00,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501859755] [2024-06-14 12:21:00,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:00,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:00,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:00,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:00,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 574 transitions, 9304 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) [2024-06-14 12:21:00,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:00,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:02,980 INFO L124 PetriNetUnfolderBase]: 4698/7229 cut-off events. [2024-06-14 12:21:02,981 INFO L125 PetriNetUnfolderBase]: For 739833/739856 co-relation queries the response was YES. [2024-06-14 12:21:03,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68860 conditions, 7229 events. 4698/7229 cut-off events. For 739833/739856 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41174 event pairs, 1252 based on Foata normal form. 24/7250 useless extension candidates. Maximal degree in co-relation 68728. Up to 6098 conditions per place. [2024-06-14 12:21:03,067 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 441 selfloop transitions, 170 changer transitions 0/618 dead transitions. [2024-06-14 12:21:03,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 618 transitions, 10788 flow [2024-06-14 12:21:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:21:03,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:21:03,068 INFO L175 Difference]: Start difference. First operand has 287 places, 574 transitions, 9304 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:21:03,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 618 transitions, 10788 flow [2024-06-14 12:21:04,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 618 transitions, 10579 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:04,145 INFO L231 Difference]: Finished difference. Result has 292 places, 577 transitions, 9505 flow [2024-06-14 12:21:04,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9505, PETRI_PLACES=292, PETRI_TRANSITIONS=577} [2024-06-14 12:21:04,145 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 246 predicate places. [2024-06-14 12:21:04,145 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 577 transitions, 9505 flow [2024-06-14 12:21:04,145 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) [2024-06-14 12:21:04,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:04,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:04,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:21:04,146 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:04,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash 681847627, now seen corresponding path program 6 times [2024-06-14 12:21:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251237019] [2024-06-14 12:21:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:05,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251237019] [2024-06-14 12:21:05,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251237019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:05,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:05,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:05,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063550014] [2024-06-14 12:21:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:05,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:05,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:05,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:05,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 577 transitions, 9505 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) [2024-06-14 12:21:05,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:05,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:05,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:07,458 INFO L124 PetriNetUnfolderBase]: 4708/7243 cut-off events. [2024-06-14 12:21:07,459 INFO L125 PetriNetUnfolderBase]: For 762960/762983 co-relation queries the response was YES. [2024-06-14 12:21:07,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69565 conditions, 7243 events. 4708/7243 cut-off events. For 762960/762983 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41333 event pairs, 1251 based on Foata normal form. 24/7264 useless extension candidates. Maximal degree in co-relation 69432. Up to 6062 conditions per place. [2024-06-14 12:21:07,549 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 440 selfloop transitions, 179 changer transitions 0/626 dead transitions. [2024-06-14 12:21:07,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 626 transitions, 11037 flow [2024-06-14 12:21:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:21:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:21:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-14 12:21:07,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45656565656565656 [2024-06-14 12:21:07,550 INFO L175 Difference]: Start difference. First operand has 292 places, 577 transitions, 9505 flow. Second operand 11 states and 226 transitions. [2024-06-14 12:21:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 626 transitions, 11037 flow [2024-06-14 12:21:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 626 transitions, 10669 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:08,645 INFO L231 Difference]: Finished difference. Result has 295 places, 580 transitions, 9575 flow [2024-06-14 12:21:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9137, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9575, PETRI_PLACES=295, PETRI_TRANSITIONS=580} [2024-06-14 12:21:08,645 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 249 predicate places. [2024-06-14 12:21:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 580 transitions, 9575 flow [2024-06-14 12:21:08,645 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) [2024-06-14 12:21:08,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:08,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:21:08,646 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:08,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1370607538, now seen corresponding path program 2 times [2024-06-14 12:21:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:08,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148727242] [2024-06-14 12:21:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:08,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148727242] [2024-06-14 12:21:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148727242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:09,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:09,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788308189] [2024-06-14 12:21:09,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:09,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:09,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:09,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:09,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:09,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 580 transitions, 9575 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:09,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:09,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:09,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:11,493 INFO L124 PetriNetUnfolderBase]: 5010/7650 cut-off events. [2024-06-14 12:21:11,493 INFO L125 PetriNetUnfolderBase]: For 814256/814272 co-relation queries the response was YES. [2024-06-14 12:21:11,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73330 conditions, 7650 events. 5010/7650 cut-off events. For 814256/814272 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42974 event pairs, 1478 based on Foata normal form. 17/7655 useless extension candidates. Maximal degree in co-relation 73196. Up to 6795 conditions per place. [2024-06-14 12:21:11,587 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 474 selfloop transitions, 72 changer transitions 0/620 dead transitions. [2024-06-14 12:21:11,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 620 transitions, 11321 flow [2024-06-14 12:21:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:21:11,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:21:11,588 INFO L175 Difference]: Start difference. First operand has 295 places, 580 transitions, 9575 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:21:11,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 620 transitions, 11321 flow [2024-06-14 12:21:12,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 620 transitions, 10923 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 12:21:12,645 INFO L231 Difference]: Finished difference. Result has 295 places, 596 transitions, 9573 flow [2024-06-14 12:21:12,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9183, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9573, PETRI_PLACES=295, PETRI_TRANSITIONS=596} [2024-06-14 12:21:12,646 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 249 predicate places. [2024-06-14 12:21:12,646 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 596 transitions, 9573 flow [2024-06-14 12:21:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:12,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:12,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:21:12,647 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:12,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2020390168, now seen corresponding path program 3 times [2024-06-14 12:21:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:12,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578940579] [2024-06-14 12:21:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:13,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:13,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578940579] [2024-06-14 12:21:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578940579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:13,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:13,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292782365] [2024-06-14 12:21:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:13,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:13,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 596 transitions, 9573 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:13,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:15,478 INFO L124 PetriNetUnfolderBase]: 5006/7647 cut-off events. [2024-06-14 12:21:15,479 INFO L125 PetriNetUnfolderBase]: For 805723/805749 co-relation queries the response was YES. [2024-06-14 12:21:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72391 conditions, 7647 events. 5006/7647 cut-off events. For 805723/805749 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43030 event pairs, 1480 based on Foata normal form. 27/7662 useless extension candidates. Maximal degree in co-relation 72255. Up to 6793 conditions per place. [2024-06-14 12:21:15,589 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 473 selfloop transitions, 69 changer transitions 0/616 dead transitions. [2024-06-14 12:21:15,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 616 transitions, 10977 flow [2024-06-14 12:21:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:21:15,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:21:15,590 INFO L175 Difference]: Start difference. First operand has 295 places, 596 transitions, 9573 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:21:15,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 616 transitions, 10977 flow [2024-06-14 12:21:16,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 616 transitions, 10859 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:21:16,908 INFO L231 Difference]: Finished difference. Result has 300 places, 596 transitions, 9601 flow [2024-06-14 12:21:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9455, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9601, PETRI_PLACES=300, PETRI_TRANSITIONS=596} [2024-06-14 12:21:16,909 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 254 predicate places. [2024-06-14 12:21:16,909 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 596 transitions, 9601 flow [2024-06-14 12:21:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:16,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:16,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:16,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:21:16,909 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:16,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1974233772, now seen corresponding path program 1 times [2024-06-14 12:21:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:16,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560698585] [2024-06-14 12:21:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:16,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:17,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:17,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560698585] [2024-06-14 12:21:17,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560698585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:17,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:17,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092632886] [2024-06-14 12:21:17,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:17,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:17,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:21:17,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 596 transitions, 9601 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:17,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:17,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:21:17,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:19,664 INFO L124 PetriNetUnfolderBase]: 5202/7847 cut-off events. [2024-06-14 12:21:19,664 INFO L125 PetriNetUnfolderBase]: For 827111/827117 co-relation queries the response was YES. [2024-06-14 12:21:19,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73820 conditions, 7847 events. 5202/7847 cut-off events. For 827111/827117 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43295 event pairs, 1751 based on Foata normal form. 7/7844 useless extension candidates. Maximal degree in co-relation 73683. Up to 7345 conditions per place. [2024-06-14 12:21:19,769 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 519 selfloop transitions, 30 changer transitions 0/621 dead transitions. [2024-06-14 12:21:19,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 621 transitions, 10991 flow [2024-06-14 12:21:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:21:19,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-14 12:21:19,770 INFO L175 Difference]: Start difference. First operand has 300 places, 596 transitions, 9601 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:21:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 621 transitions, 10991 flow [2024-06-14 12:21:20,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 621 transitions, 10850 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:20,931 INFO L231 Difference]: Finished difference. Result has 303 places, 602 transitions, 9628 flow [2024-06-14 12:21:20,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9460, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9628, PETRI_PLACES=303, PETRI_TRANSITIONS=602} [2024-06-14 12:21:20,931 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 257 predicate places. [2024-06-14 12:21:20,931 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 602 transitions, 9628 flow [2024-06-14 12:21:20,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:20,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:20,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:20,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:21:20,932 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)] === [2024-06-14 12:21:20,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1359155522, now seen corresponding path program 8 times [2024-06-14 12:21:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:20,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151149181] [2024-06-14 12:21:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151149181] [2024-06-14 12:21:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151149181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:22,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:22,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083632655] [2024-06-14 12:21:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:22,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:22,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 602 transitions, 9628 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) [2024-06-14 12:21:22,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:22,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:22,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:24,213 INFO L124 PetriNetUnfolderBase]: 4798/7350 cut-off events. [2024-06-14 12:21:24,213 INFO L125 PetriNetUnfolderBase]: For 837710/837743 co-relation queries the response was YES. [2024-06-14 12:21:24,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71326 conditions, 7350 events. 4798/7350 cut-off events. For 837710/837743 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41932 event pairs, 992 based on Foata normal form. 34/7371 useless extension candidates. Maximal degree in co-relation 71188. Up to 5393 conditions per place. [2024-06-14 12:21:24,302 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 358 selfloop transitions, 276 changer transitions 0/643 dead transitions. [2024-06-14 12:21:24,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 643 transitions, 11356 flow [2024-06-14 12:21:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:21:24,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2024-06-14 12:21:24,304 INFO L175 Difference]: Start difference. First operand has 303 places, 602 transitions, 9628 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:21:24,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 643 transitions, 11356 flow [2024-06-14 12:21:25,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 643 transitions, 11294 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:25,428 INFO L231 Difference]: Finished difference. Result has 308 places, 606 transitions, 10205 flow [2024-06-14 12:21:25,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10205, PETRI_PLACES=308, PETRI_TRANSITIONS=606} [2024-06-14 12:21:25,429 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 262 predicate places. [2024-06-14 12:21:25,429 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 606 transitions, 10205 flow [2024-06-14 12:21:25,429 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) [2024-06-14 12:21:25,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:25,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:21:25,429 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:25,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1311475434, now seen corresponding path program 9 times [2024-06-14 12:21:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964891001] [2024-06-14 12:21:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:26,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964891001] [2024-06-14 12:21:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964891001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:26,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:26,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177000096] [2024-06-14 12:21:26,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:26,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:26,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:26,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 606 transitions, 10205 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) [2024-06-14 12:21:26,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:26,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:28,442 INFO L124 PetriNetUnfolderBase]: 4859/7463 cut-off events. [2024-06-14 12:21:28,442 INFO L125 PetriNetUnfolderBase]: For 873383/873416 co-relation queries the response was YES. [2024-06-14 12:21:28,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73612 conditions, 7463 events. 4859/7463 cut-off events. For 873383/873416 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42797 event pairs, 1275 based on Foata normal form. 36/7492 useless extension candidates. Maximal degree in co-relation 73472. Up to 6387 conditions per place. [2024-06-14 12:21:28,564 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 428 selfloop transitions, 212 changer transitions 0/649 dead transitions. [2024-06-14 12:21:28,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 649 transitions, 11800 flow [2024-06-14 12:21:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:21:28,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:21:28,565 INFO L175 Difference]: Start difference. First operand has 308 places, 606 transitions, 10205 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:21:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 649 transitions, 11800 flow [2024-06-14 12:21:29,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 649 transitions, 11301 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:29,767 INFO L231 Difference]: Finished difference. Result has 310 places, 616 transitions, 10328 flow [2024-06-14 12:21:29,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9716, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10328, PETRI_PLACES=310, PETRI_TRANSITIONS=616} [2024-06-14 12:21:29,768 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 264 predicate places. [2024-06-14 12:21:29,768 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 616 transitions, 10328 flow [2024-06-14 12:21:29,768 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) [2024-06-14 12:21:29,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:29,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:21:29,769 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:29,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1935992822, now seen corresponding path program 10 times [2024-06-14 12:21:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:29,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994877188] [2024-06-14 12:21:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:31,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:31,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994877188] [2024-06-14 12:21:31,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994877188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:31,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140123723] [2024-06-14 12:21:31,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:31,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:31,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:31,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 616 transitions, 10328 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) [2024-06-14 12:21:31,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:31,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:31,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:33,032 INFO L124 PetriNetUnfolderBase]: 4955/7611 cut-off events. [2024-06-14 12:21:33,032 INFO L125 PetriNetUnfolderBase]: For 866996/867029 co-relation queries the response was YES. [2024-06-14 12:21:33,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74523 conditions, 7611 events. 4955/7611 cut-off events. For 866996/867029 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 43926 event pairs, 1255 based on Foata normal form. 36/7638 useless extension candidates. Maximal degree in co-relation 74383. Up to 6229 conditions per place. [2024-06-14 12:21:33,150 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 405 selfloop transitions, 257 changer transitions 0/671 dead transitions. [2024-06-14 12:21:33,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 671 transitions, 12372 flow [2024-06-14 12:21:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 12:21:33,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45111111111111113 [2024-06-14 12:21:33,152 INFO L175 Difference]: Start difference. First operand has 310 places, 616 transitions, 10328 flow. Second operand 10 states and 203 transitions. [2024-06-14 12:21:33,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 671 transitions, 12372 flow [2024-06-14 12:21:34,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 671 transitions, 11900 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:34,291 INFO L231 Difference]: Finished difference. Result has 313 places, 628 transitions, 10652 flow [2024-06-14 12:21:34,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9856, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10652, PETRI_PLACES=313, PETRI_TRANSITIONS=628} [2024-06-14 12:21:34,292 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 267 predicate places. [2024-06-14 12:21:34,292 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 628 transitions, 10652 flow [2024-06-14 12:21:34,292 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) [2024-06-14 12:21:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:34,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:21:34,293 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)] === [2024-06-14 12:21:34,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:34,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2022838237, now seen corresponding path program 7 times [2024-06-14 12:21:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:34,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009652187] [2024-06-14 12:21:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:34,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009652187] [2024-06-14 12:21:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009652187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:35,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:35,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:35,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028532411] [2024-06-14 12:21:35,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:35,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:35,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 628 transitions, 10652 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) [2024-06-14 12:21:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:37,719 INFO L124 PetriNetUnfolderBase]: 5013/7719 cut-off events. [2024-06-14 12:21:37,719 INFO L125 PetriNetUnfolderBase]: For 890630/890653 co-relation queries the response was YES. [2024-06-14 12:21:37,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75679 conditions, 7719 events. 5013/7719 cut-off events. For 890630/890653 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44890 event pairs, 1349 based on Foata normal form. 26/7739 useless extension candidates. Maximal degree in co-relation 75538. Up to 6399 conditions per place. [2024-06-14 12:21:37,827 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 457 selfloop transitions, 206 changer transitions 0/672 dead transitions. [2024-06-14 12:21:37,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 672 transitions, 12315 flow [2024-06-14 12:21:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 12:21:37,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-06-14 12:21:37,828 INFO L175 Difference]: Start difference. First operand has 313 places, 628 transitions, 10652 flow. Second operand 9 states and 183 transitions. [2024-06-14 12:21:37,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 672 transitions, 12315 flow [2024-06-14 12:21:39,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 672 transitions, 11982 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:39,230 INFO L231 Difference]: Finished difference. Result has 316 places, 637 transitions, 10882 flow [2024-06-14 12:21:39,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10319, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10882, PETRI_PLACES=316, PETRI_TRANSITIONS=637} [2024-06-14 12:21:39,231 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 270 predicate places. [2024-06-14 12:21:39,231 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 637 transitions, 10882 flow [2024-06-14 12:21:39,231 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) [2024-06-14 12:21:39,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:39,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:39,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:21:39,231 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)] === [2024-06-14 12:21:39,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1318177147, now seen corresponding path program 8 times [2024-06-14 12:21:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:39,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621646462] [2024-06-14 12:21:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:39,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621646462] [2024-06-14 12:21:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621646462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:40,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320133068] [2024-06-14 12:21:40,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:40,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:40,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:40,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 637 transitions, 10882 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) [2024-06-14 12:21:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:43,008 INFO L124 PetriNetUnfolderBase]: 5224/8059 cut-off events. [2024-06-14 12:21:43,009 INFO L125 PetriNetUnfolderBase]: For 926074/926077 co-relation queries the response was YES. [2024-06-14 12:21:43,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79995 conditions, 8059 events. 5224/8059 cut-off events. For 926074/926077 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47361 event pairs, 1728 based on Foata normal form. 6/8057 useless extension candidates. Maximal degree in co-relation 79852. Up to 6748 conditions per place. [2024-06-14 12:21:43,122 INFO L140 encePairwiseOnDemand]: 30/45 looper letters, 493 selfloop transitions, 225 changer transitions 0/727 dead transitions. [2024-06-14 12:21:43,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 727 transitions, 13801 flow [2024-06-14 12:21:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:21:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:21:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:21:43,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:21:43,123 INFO L175 Difference]: Start difference. First operand has 316 places, 637 transitions, 10882 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:21:43,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 727 transitions, 13801 flow [2024-06-14 12:21:44,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 727 transitions, 13275 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:44,316 INFO L231 Difference]: Finished difference. Result has 325 places, 686 transitions, 12311 flow [2024-06-14 12:21:44,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10426, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12311, PETRI_PLACES=325, PETRI_TRANSITIONS=686} [2024-06-14 12:21:44,317 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 279 predicate places. [2024-06-14 12:21:44,317 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 686 transitions, 12311 flow [2024-06-14 12:21:44,317 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) [2024-06-14 12:21:44,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:44,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:44,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:21:44,317 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)] === [2024-06-14 12:21:44,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1464252790, now seen corresponding path program 11 times [2024-06-14 12:21:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618746341] [2024-06-14 12:21:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618746341] [2024-06-14 12:21:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618746341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084709562] [2024-06-14 12:21:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:45,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:45,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 686 transitions, 12311 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) [2024-06-14 12:21:45,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:45,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:45,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:47,834 INFO L124 PetriNetUnfolderBase]: 5291/8157 cut-off events. [2024-06-14 12:21:47,834 INFO L125 PetriNetUnfolderBase]: For 956007/956029 co-relation queries the response was YES. [2024-06-14 12:21:47,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81973 conditions, 8157 events. 5291/8157 cut-off events. For 956007/956029 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 48002 event pairs, 1394 based on Foata normal form. 24/8167 useless extension candidates. Maximal degree in co-relation 81824. Up to 7272 conditions per place. [2024-06-14 12:21:47,942 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 574 selfloop transitions, 145 changer transitions 0/728 dead transitions. [2024-06-14 12:21:47,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 728 transitions, 14126 flow [2024-06-14 12:21:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:21:47,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:21:47,943 INFO L175 Difference]: Start difference. First operand has 325 places, 686 transitions, 12311 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:21:47,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 728 transitions, 14126 flow [2024-06-14 12:21:49,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 728 transitions, 13796 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:49,495 INFO L231 Difference]: Finished difference. Result has 328 places, 696 transitions, 12496 flow [2024-06-14 12:21:49,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=11981, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12496, PETRI_PLACES=328, PETRI_TRANSITIONS=696} [2024-06-14 12:21:49,496 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 282 predicate places. [2024-06-14 12:21:49,496 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 696 transitions, 12496 flow [2024-06-14 12:21:49,496 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) [2024-06-14 12:21:49,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:49,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:21:49,496 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)] === [2024-06-14 12:21:49,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1224783624, now seen corresponding path program 12 times [2024-06-14 12:21:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:49,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724308990] [2024-06-14 12:21:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724308990] [2024-06-14 12:21:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724308990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371140033] [2024-06-14 12:21:50,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:50,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:50,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:50,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 696 transitions, 12496 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) [2024-06-14 12:21:50,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:50,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:50,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:53,159 INFO L124 PetriNetUnfolderBase]: 5273/8135 cut-off events. [2024-06-14 12:21:53,159 INFO L125 PetriNetUnfolderBase]: For 967067/967089 co-relation queries the response was YES. [2024-06-14 12:21:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81405 conditions, 8135 events. 5273/8135 cut-off events. For 967067/967089 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47948 event pairs, 1384 based on Foata normal form. 24/8149 useless extension candidates. Maximal degree in co-relation 81254. Up to 7193 conditions per place. [2024-06-14 12:21:53,277 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 556 selfloop transitions, 165 changer transitions 0/730 dead transitions. [2024-06-14 12:21:53,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 730 transitions, 14149 flow [2024-06-14 12:21:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:21:53,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-14 12:21:53,279 INFO L175 Difference]: Start difference. First operand has 328 places, 696 transitions, 12496 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:21:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 730 transitions, 14149 flow [2024-06-14 12:21:54,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 730 transitions, 13744 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:54,934 INFO L231 Difference]: Finished difference. Result has 330 places, 696 transitions, 12439 flow [2024-06-14 12:21:54,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12091, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12439, PETRI_PLACES=330, PETRI_TRANSITIONS=696} [2024-06-14 12:21:54,935 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 284 predicate places. [2024-06-14 12:21:54,935 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 696 transitions, 12439 flow [2024-06-14 12:21:54,935 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) [2024-06-14 12:21:54,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:54,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:54,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:21:54,935 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)] === [2024-06-14 12:21:54,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1224783469, now seen corresponding path program 9 times [2024-06-14 12:21:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:54,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010287740] [2024-06-14 12:21:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:56,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:56,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010287740] [2024-06-14 12:21:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010287740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:56,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:56,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:56,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503159143] [2024-06-14 12:21:56,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:56,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:21:56,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 696 transitions, 12439 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) [2024-06-14 12:21:56,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:56,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:21:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:58,275 INFO L124 PetriNetUnfolderBase]: 5343/8252 cut-off events. [2024-06-14 12:21:58,275 INFO L125 PetriNetUnfolderBase]: For 991043/991065 co-relation queries the response was YES. [2024-06-14 12:21:58,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82297 conditions, 8252 events. 5343/8252 cut-off events. For 991043/991065 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 48829 event pairs, 1369 based on Foata normal form. 22/8271 useless extension candidates. Maximal degree in co-relation 82145. Up to 6539 conditions per place. [2024-06-14 12:21:58,411 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 444 selfloop transitions, 294 changer transitions 0/747 dead transitions. [2024-06-14 12:21:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 747 transitions, 14605 flow [2024-06-14 12:21:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:21:58,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:21:58,412 INFO L175 Difference]: Start difference. First operand has 330 places, 696 transitions, 12439 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:21:58,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 747 transitions, 14605 flow [2024-06-14 12:22:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 747 transitions, 14176 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:22:00,051 INFO L231 Difference]: Finished difference. Result has 331 places, 705 transitions, 12778 flow [2024-06-14 12:22:00,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12778, PETRI_PLACES=331, PETRI_TRANSITIONS=705} [2024-06-14 12:22:00,052 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 285 predicate places. [2024-06-14 12:22:00,052 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 705 transitions, 12778 flow [2024-06-14 12:22:00,053 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) [2024-06-14 12:22:00,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:00,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:22:00,053 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:00,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash 694009358, now seen corresponding path program 4 times [2024-06-14 12:22:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713824122] [2024-06-14 12:22:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:00,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713824122] [2024-06-14 12:22:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713824122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:00,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:00,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073663165] [2024-06-14 12:22:00,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:00,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:01,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:01,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 705 transitions, 12778 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:01,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:01,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:01,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:03,045 INFO L124 PetriNetUnfolderBase]: 5647/8639 cut-off events. [2024-06-14 12:22:03,045 INFO L125 PetriNetUnfolderBase]: For 1038302/1038317 co-relation queries the response was YES. [2024-06-14 12:22:03,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86702 conditions, 8639 events. 5647/8639 cut-off events. For 1038302/1038317 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 50045 event pairs, 1538 based on Foata normal form. 15/8642 useless extension candidates. Maximal degree in co-relation 86549. Up to 7629 conditions per place. [2024-06-14 12:22:03,177 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 541 selfloop transitions, 93 changer transitions 0/730 dead transitions. [2024-06-14 12:22:03,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 730 transitions, 14472 flow [2024-06-14 12:22:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:22:03,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:22:03,178 INFO L175 Difference]: Start difference. First operand has 331 places, 705 transitions, 12778 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:22:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 730 transitions, 14472 flow [2024-06-14 12:22:04,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 730 transitions, 13852 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:04,946 INFO L231 Difference]: Finished difference. Result has 332 places, 709 transitions, 12430 flow [2024-06-14 12:22:04,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12158, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12430, PETRI_PLACES=332, PETRI_TRANSITIONS=709} [2024-06-14 12:22:04,947 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 286 predicate places. [2024-06-14 12:22:04,947 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 709 transitions, 12430 flow [2024-06-14 12:22:04,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:04,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:04,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:22:04,948 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)] === [2024-06-14 12:22:04,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1945728370, now seen corresponding path program 13 times [2024-06-14 12:22:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:04,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650908565] [2024-06-14 12:22:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:06,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:06,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650908565] [2024-06-14 12:22:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650908565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:06,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097605091] [2024-06-14 12:22:06,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:06,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:06,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:06,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 709 transitions, 12430 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) [2024-06-14 12:22:06,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:06,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:06,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:08,463 INFO L124 PetriNetUnfolderBase]: 5380/8297 cut-off events. [2024-06-14 12:22:08,463 INFO L125 PetriNetUnfolderBase]: For 1038448/1038470 co-relation queries the response was YES. [2024-06-14 12:22:08,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83123 conditions, 8297 events. 5380/8297 cut-off events. For 1038448/1038470 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49162 event pairs, 1037 based on Foata normal form. 24/8310 useless extension candidates. Maximal degree in co-relation 82969. Up to 6861 conditions per place. [2024-06-14 12:22:08,596 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 514 selfloop transitions, 233 changer transitions 0/756 dead transitions. [2024-06-14 12:22:08,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 756 transitions, 14523 flow [2024-06-14 12:22:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:22:08,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:22:08,597 INFO L175 Difference]: Start difference. First operand has 332 places, 709 transitions, 12430 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:22:08,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 756 transitions, 14523 flow [2024-06-14 12:22:10,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 756 transitions, 14348 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:10,684 INFO L231 Difference]: Finished difference. Result has 336 places, 715 transitions, 12881 flow [2024-06-14 12:22:10,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12259, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12881, PETRI_PLACES=336, PETRI_TRANSITIONS=715} [2024-06-14 12:22:10,684 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 290 predicate places. [2024-06-14 12:22:10,684 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 715 transitions, 12881 flow [2024-06-14 12:22:10,684 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) [2024-06-14 12:22:10,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:10,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:10,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:22:10,685 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)] === [2024-06-14 12:22:10,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2109629330, now seen corresponding path program 14 times [2024-06-14 12:22:10,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:10,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834251627] [2024-06-14 12:22:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:10,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:11,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:11,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834251627] [2024-06-14 12:22:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834251627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:11,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:11,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071178903] [2024-06-14 12:22:11,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:11,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:12,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:12,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 715 transitions, 12881 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) [2024-06-14 12:22:12,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:12,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:12,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:14,284 INFO L124 PetriNetUnfolderBase]: 5447/8394 cut-off events. [2024-06-14 12:22:14,284 INFO L125 PetriNetUnfolderBase]: For 1019668/1019690 co-relation queries the response was YES. [2024-06-14 12:22:14,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84257 conditions, 8394 events. 5447/8394 cut-off events. For 1019668/1019690 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49700 event pairs, 1329 based on Foata normal form. 24/8407 useless extension candidates. Maximal degree in co-relation 84103. Up to 7351 conditions per place. [2024-06-14 12:22:14,391 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 554 selfloop transitions, 199 changer transitions 0/762 dead transitions. [2024-06-14 12:22:14,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 762 transitions, 14783 flow [2024-06-14 12:22:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:22:14,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 12:22:14,392 INFO L175 Difference]: Start difference. First operand has 336 places, 715 transitions, 12881 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:22:14,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 762 transitions, 14783 flow [2024-06-14 12:22:15,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 762 transitions, 13915 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-14 12:22:16,003 INFO L231 Difference]: Finished difference. Result has 336 places, 725 transitions, 12655 flow [2024-06-14 12:22:16,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12045, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12655, PETRI_PLACES=336, PETRI_TRANSITIONS=725} [2024-06-14 12:22:16,004 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 290 predicate places. [2024-06-14 12:22:16,004 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 725 transitions, 12655 flow [2024-06-14 12:22:16,004 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) [2024-06-14 12:22:16,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:16,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:16,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:22:16,005 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)] === [2024-06-14 12:22:16,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1301747481, now seen corresponding path program 10 times [2024-06-14 12:22:16,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:16,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763517183] [2024-06-14 12:22:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:16,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:17,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:17,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763517183] [2024-06-14 12:22:17,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763517183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:17,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:17,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:17,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716686852] [2024-06-14 12:22:17,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:17,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:17,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:17,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:17,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 725 transitions, 12655 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) [2024-06-14 12:22:17,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:17,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:17,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:19,416 INFO L124 PetriNetUnfolderBase]: 5517/8499 cut-off events. [2024-06-14 12:22:19,416 INFO L125 PetriNetUnfolderBase]: For 1014517/1014539 co-relation queries the response was YES. [2024-06-14 12:22:19,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83579 conditions, 8499 events. 5517/8499 cut-off events. For 1014517/1014539 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 50468 event pairs, 1285 based on Foata normal form. 22/8516 useless extension candidates. Maximal degree in co-relation 83426. Up to 6507 conditions per place. [2024-06-14 12:22:19,555 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 449 selfloop transitions, 327 changer transitions 0/785 dead transitions. [2024-06-14 12:22:19,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 785 transitions, 15458 flow [2024-06-14 12:22:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 12:22:19,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:22:19,557 INFO L175 Difference]: Start difference. First operand has 336 places, 725 transitions, 12655 flow. Second operand 9 states and 200 transitions. [2024-06-14 12:22:19,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 785 transitions, 15458 flow [2024-06-14 12:22:21,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 785 transitions, 15000 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:21,417 INFO L231 Difference]: Finished difference. Result has 339 places, 737 transitions, 13201 flow [2024-06-14 12:22:21,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12197, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13201, PETRI_PLACES=339, PETRI_TRANSITIONS=737} [2024-06-14 12:22:21,418 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 293 predicate places. [2024-06-14 12:22:21,418 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 737 transitions, 13201 flow [2024-06-14 12:22:21,418 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) [2024-06-14 12:22:21,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:21,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:21,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:22:21,418 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)] === [2024-06-14 12:22:21,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:21,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1307259591, now seen corresponding path program 11 times [2024-06-14 12:22:21,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:21,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331591382] [2024-06-14 12:22:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331591382] [2024-06-14 12:22:22,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331591382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:22,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:22,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630994555] [2024-06-14 12:22:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:22,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:22,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 737 transitions, 13201 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) [2024-06-14 12:22:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:25,065 INFO L124 PetriNetUnfolderBase]: 5567/8597 cut-off events. [2024-06-14 12:22:25,065 INFO L125 PetriNetUnfolderBase]: For 1055430/1055452 co-relation queries the response was YES. [2024-06-14 12:22:25,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85837 conditions, 8597 events. 5567/8597 cut-off events. For 1055430/1055452 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51216 event pairs, 1324 based on Foata normal form. 24/8618 useless extension candidates. Maximal degree in co-relation 85682. Up to 7105 conditions per place. [2024-06-14 12:22:25,200 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 537 selfloop transitions, 241 changer transitions 0/787 dead transitions. [2024-06-14 12:22:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 787 transitions, 15226 flow [2024-06-14 12:22:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:22:25,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 12:22:25,202 INFO L175 Difference]: Start difference. First operand has 339 places, 737 transitions, 13201 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:22:25,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 787 transitions, 15226 flow [2024-06-14 12:22:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 787 transitions, 14663 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:27,089 INFO L231 Difference]: Finished difference. Result has 343 places, 746 transitions, 13370 flow [2024-06-14 12:22:27,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12656, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13370, PETRI_PLACES=343, PETRI_TRANSITIONS=746} [2024-06-14 12:22:27,089 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 297 predicate places. [2024-06-14 12:22:27,089 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 746 transitions, 13370 flow [2024-06-14 12:22:27,090 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) [2024-06-14 12:22:27,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:27,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:27,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:22:27,090 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:27,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1301891631, now seen corresponding path program 12 times [2024-06-14 12:22:27,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:27,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258445011] [2024-06-14 12:22:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:28,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258445011] [2024-06-14 12:22:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258445011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:28,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:28,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874316000] [2024-06-14 12:22:28,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:28,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:28,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:28,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 746 transitions, 13370 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) [2024-06-14 12:22:28,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:28,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:28,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:30,787 INFO L124 PetriNetUnfolderBase]: 5677/8751 cut-off events. [2024-06-14 12:22:30,787 INFO L125 PetriNetUnfolderBase]: For 1097858/1097870 co-relation queries the response was YES. [2024-06-14 12:22:30,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87560 conditions, 8751 events. 5677/8751 cut-off events. For 1097858/1097870 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 52260 event pairs, 1351 based on Foata normal form. 14/8760 useless extension candidates. Maximal degree in co-relation 87404. Up to 7148 conditions per place. [2024-06-14 12:22:30,913 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 523 selfloop transitions, 277 changer transitions 0/809 dead transitions. [2024-06-14 12:22:30,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 809 transitions, 16352 flow [2024-06-14 12:22:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 12:22:30,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48641975308641977 [2024-06-14 12:22:30,914 INFO L175 Difference]: Start difference. First operand has 343 places, 746 transitions, 13370 flow. Second operand 9 states and 197 transitions. [2024-06-14 12:22:30,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 809 transitions, 16352 flow [2024-06-14 12:22:33,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 809 transitions, 15768 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:33,032 INFO L231 Difference]: Finished difference. Result has 345 places, 761 transitions, 13680 flow [2024-06-14 12:22:33,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12786, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13680, PETRI_PLACES=345, PETRI_TRANSITIONS=761} [2024-06-14 12:22:33,033 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 299 predicate places. [2024-06-14 12:22:33,033 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 761 transitions, 13680 flow [2024-06-14 12:22:33,033 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) [2024-06-14 12:22:33,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:33,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:33,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:22:33,033 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:33,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1301891476, now seen corresponding path program 15 times [2024-06-14 12:22:33,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:33,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324278911] [2024-06-14 12:22:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:33,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:34,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324278911] [2024-06-14 12:22:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324278911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:34,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:34,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342513638] [2024-06-14 12:22:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:34,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:34,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:34,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:34,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 761 transitions, 13680 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) [2024-06-14 12:22:34,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:34,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:34,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:36,773 INFO L124 PetriNetUnfolderBase]: 5716/8818 cut-off events. [2024-06-14 12:22:36,773 INFO L125 PetriNetUnfolderBase]: For 1130713/1130725 co-relation queries the response was YES. [2024-06-14 12:22:36,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88431 conditions, 8818 events. 5716/8818 cut-off events. For 1130713/1130725 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52858 event pairs, 1423 based on Foata normal form. 16/8827 useless extension candidates. Maximal degree in co-relation 88274. Up to 7908 conditions per place. [2024-06-14 12:22:36,893 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 644 selfloop transitions, 148 changer transitions 0/801 dead transitions. [2024-06-14 12:22:36,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 801 transitions, 15584 flow [2024-06-14 12:22:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:22:36,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:22:36,895 INFO L175 Difference]: Start difference. First operand has 345 places, 761 transitions, 13680 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:22:36,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 801 transitions, 15584 flow [2024-06-14 12:22:38,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 801 transitions, 15153 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:38,733 INFO L231 Difference]: Finished difference. Result has 349 places, 767 transitions, 13711 flow [2024-06-14 12:22:38,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13249, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13711, PETRI_PLACES=349, PETRI_TRANSITIONS=767} [2024-06-14 12:22:38,734 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 303 predicate places. [2024-06-14 12:22:38,734 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 767 transitions, 13711 flow [2024-06-14 12:22:38,734 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) [2024-06-14 12:22:38,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:38,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:22:38,734 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:38,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1301897211, now seen corresponding path program 13 times [2024-06-14 12:22:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:38,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564696621] [2024-06-14 12:22:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:38,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:40,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:40,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564696621] [2024-06-14 12:22:40,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564696621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:40,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:40,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:40,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532356326] [2024-06-14 12:22:40,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:40,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:40,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:40,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:40,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 767 transitions, 13711 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) [2024-06-14 12:22:40,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:40,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:40,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:42,309 INFO L124 PetriNetUnfolderBase]: 5700/8785 cut-off events. [2024-06-14 12:22:42,309 INFO L125 PetriNetUnfolderBase]: For 1132962/1132974 co-relation queries the response was YES. [2024-06-14 12:22:42,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88320 conditions, 8785 events. 5700/8785 cut-off events. For 1132962/1132974 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52568 event pairs, 1350 based on Foata normal form. 14/8794 useless extension candidates. Maximal degree in co-relation 88161. Up to 7309 conditions per place. [2024-06-14 12:22:42,434 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 546 selfloop transitions, 252 changer transitions 0/807 dead transitions. [2024-06-14 12:22:42,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 807 transitions, 15547 flow [2024-06-14 12:22:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:22:42,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4617283950617284 [2024-06-14 12:22:42,435 INFO L175 Difference]: Start difference. First operand has 349 places, 767 transitions, 13711 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:22:42,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 807 transitions, 15547 flow [2024-06-14 12:22:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 807 transitions, 15108 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:44,649 INFO L231 Difference]: Finished difference. Result has 352 places, 767 transitions, 13795 flow [2024-06-14 12:22:44,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13272, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13795, PETRI_PLACES=352, PETRI_TRANSITIONS=767} [2024-06-14 12:22:44,650 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 306 predicate places. [2024-06-14 12:22:44,650 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 767 transitions, 13795 flow [2024-06-14 12:22:44,650 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) [2024-06-14 12:22:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:44,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:44,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:22:44,651 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:44,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1307461401, now seen corresponding path program 14 times [2024-06-14 12:22:44,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:44,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383240741] [2024-06-14 12:22:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:45,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:45,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383240741] [2024-06-14 12:22:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383240741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872145696] [2024-06-14 12:22:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:45,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:46,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:46,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 767 transitions, 13795 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) [2024-06-14 12:22:46,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:46,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:46,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:48,250 INFO L124 PetriNetUnfolderBase]: 5750/8886 cut-off events. [2024-06-14 12:22:48,250 INFO L125 PetriNetUnfolderBase]: For 1173137/1173159 co-relation queries the response was YES. [2024-06-14 12:22:48,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89607 conditions, 8886 events. 5750/8886 cut-off events. For 1173137/1173159 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 53476 event pairs, 1341 based on Foata normal form. 24/8907 useless extension candidates. Maximal degree in co-relation 89447. Up to 7341 conditions per place. [2024-06-14 12:22:48,377 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 554 selfloop transitions, 252 changer transitions 0/815 dead transitions. [2024-06-14 12:22:48,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 815 transitions, 16127 flow [2024-06-14 12:22:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 12:22:48,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:22:48,378 INFO L175 Difference]: Start difference. First operand has 352 places, 767 transitions, 13795 flow. Second operand 9 states and 186 transitions. [2024-06-14 12:22:48,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 815 transitions, 16127 flow [2024-06-14 12:22:50,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 815 transitions, 15598 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:22:50,292 INFO L231 Difference]: Finished difference. Result has 353 places, 776 transitions, 14032 flow [2024-06-14 12:22:50,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13266, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14032, PETRI_PLACES=353, PETRI_TRANSITIONS=776} [2024-06-14 12:22:50,293 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 307 predicate places. [2024-06-14 12:22:50,293 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 776 transitions, 14032 flow [2024-06-14 12:22:50,293 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) [2024-06-14 12:22:50,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:50,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:22:50,294 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:50,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1940218120, now seen corresponding path program 16 times [2024-06-14 12:22:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298716943] [2024-06-14 12:22:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:51,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:51,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298716943] [2024-06-14 12:22:51,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298716943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:51,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:51,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:51,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952265839] [2024-06-14 12:22:51,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:51,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 776 transitions, 14032 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) [2024-06-14 12:22:51,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:51,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:54,066 INFO L124 PetriNetUnfolderBase]: 5800/8955 cut-off events. [2024-06-14 12:22:54,066 INFO L125 PetriNetUnfolderBase]: For 1210538/1210560 co-relation queries the response was YES. [2024-06-14 12:22:54,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90724 conditions, 8955 events. 5800/8955 cut-off events. For 1210538/1210560 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 53868 event pairs, 1429 based on Foata normal form. 26/8969 useless extension candidates. Maximal degree in co-relation 90563. Up to 8024 conditions per place. [2024-06-14 12:22:54,196 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 664 selfloop transitions, 143 changer transitions 0/816 dead transitions. [2024-06-14 12:22:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 816 transitions, 16028 flow [2024-06-14 12:22:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:22:54,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345679012345679 [2024-06-14 12:22:54,197 INFO L175 Difference]: Start difference. First operand has 353 places, 776 transitions, 14032 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:22:54,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 816 transitions, 16028 flow [2024-06-14 12:22:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 816 transitions, 15481 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:56,255 INFO L231 Difference]: Finished difference. Result has 356 places, 784 transitions, 14012 flow [2024-06-14 12:22:56,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13485, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14012, PETRI_PLACES=356, PETRI_TRANSITIONS=784} [2024-06-14 12:22:56,255 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 310 predicate places. [2024-06-14 12:22:56,255 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 784 transitions, 14012 flow [2024-06-14 12:22:56,255 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) [2024-06-14 12:22:56,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:56,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:22:56,256 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:56,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1940217965, now seen corresponding path program 15 times [2024-06-14 12:22:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116775765] [2024-06-14 12:22:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:57,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:57,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116775765] [2024-06-14 12:22:57,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116775765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:57,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:57,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:57,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873718095] [2024-06-14 12:22:57,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:57,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:57,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:57,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:22:57,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 784 transitions, 14012 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) [2024-06-14 12:22:57,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:57,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:22:57,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:59,762 INFO L124 PetriNetUnfolderBase]: 5850/9032 cut-off events. [2024-06-14 12:22:59,762 INFO L125 PetriNetUnfolderBase]: For 1206673/1206695 co-relation queries the response was YES. [2024-06-14 12:22:59,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90724 conditions, 9032 events. 5850/9032 cut-off events. For 1206673/1206695 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 54464 event pairs, 1334 based on Foata normal form. 24/9053 useless extension candidates. Maximal degree in co-relation 90562. Up to 7321 conditions per place. [2024-06-14 12:22:59,905 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 543 selfloop transitions, 283 changer transitions 0/835 dead transitions. [2024-06-14 12:22:59,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 835 transitions, 16435 flow [2024-06-14 12:22:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:22:59,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:22:59,907 INFO L175 Difference]: Start difference. First operand has 356 places, 784 transitions, 14012 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:22:59,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 835 transitions, 16435 flow [2024-06-14 12:23:02,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 835 transitions, 16026 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:02,256 INFO L231 Difference]: Finished difference. Result has 358 places, 793 transitions, 14446 flow [2024-06-14 12:23:02,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13607, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14446, PETRI_PLACES=358, PETRI_TRANSITIONS=793} [2024-06-14 12:23:02,257 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 312 predicate places. [2024-06-14 12:23:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 793 transitions, 14446 flow [2024-06-14 12:23:02,257 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) [2024-06-14 12:23:02,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:02,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:02,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:23:02,257 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:02,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -252860256, now seen corresponding path program 2 times [2024-06-14 12:23:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928025597] [2024-06-14 12:23:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928025597] [2024-06-14 12:23:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928025597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:03,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:03,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464567102] [2024-06-14 12:23:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:03,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:03,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:03,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:23:03,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 793 transitions, 14446 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:03,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:03,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:23:03,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:05,526 INFO L124 PetriNetUnfolderBase]: 6397/9714 cut-off events. [2024-06-14 12:23:05,527 INFO L125 PetriNetUnfolderBase]: For 1223742/1223753 co-relation queries the response was YES. [2024-06-14 12:23:05,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96592 conditions, 9714 events. 6397/9714 cut-off events. For 1223742/1223753 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56779 event pairs, 2054 based on Foata normal form. 9/9713 useless extension candidates. Maximal degree in co-relation 96429. Up to 9036 conditions per place. [2024-06-14 12:23:05,695 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 669 selfloop transitions, 35 changer transitions 0/811 dead transitions. [2024-06-14 12:23:05,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 811 transitions, 16118 flow [2024-06-14 12:23:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:23:05,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40634920634920635 [2024-06-14 12:23:05,697 INFO L175 Difference]: Start difference. First operand has 358 places, 793 transitions, 14446 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:23:05,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 811 transitions, 16118 flow [2024-06-14 12:23:07,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 811 transitions, 15396 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-14 12:23:07,926 INFO L231 Difference]: Finished difference. Result has 357 places, 796 transitions, 13858 flow [2024-06-14 12:23:07,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13724, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13858, PETRI_PLACES=357, PETRI_TRANSITIONS=796} [2024-06-14 12:23:07,927 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 311 predicate places. [2024-06-14 12:23:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 796 transitions, 13858 flow [2024-06-14 12:23:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:07,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:07,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:23:07,928 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:07,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1687212068, now seen corresponding path program 5 times [2024-06-14 12:23:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873450666] [2024-06-14 12:23:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873450666] [2024-06-14 12:23:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873450666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:08,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001678363] [2024-06-14 12:23:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:08,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:08,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:08,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 796 transitions, 13858 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:08,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:11,203 INFO L124 PetriNetUnfolderBase]: 6252/9581 cut-off events. [2024-06-14 12:23:11,203 INFO L125 PetriNetUnfolderBase]: For 1251803/1251828 co-relation queries the response was YES. [2024-06-14 12:23:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94588 conditions, 9581 events. 6252/9581 cut-off events. For 1251803/1251828 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 56801 event pairs, 1689 based on Foata normal form. 23/9592 useless extension candidates. Maximal degree in co-relation 94425. Up to 8495 conditions per place. [2024-06-14 12:23:11,352 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 619 selfloop transitions, 89 changer transitions 0/820 dead transitions. [2024-06-14 12:23:11,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 820 transitions, 15777 flow [2024-06-14 12:23:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:23:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-14 12:23:11,355 INFO L175 Difference]: Start difference. First operand has 357 places, 796 transitions, 13858 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:23:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 820 transitions, 15777 flow [2024-06-14 12:23:13,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 820 transitions, 15680 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:13,379 INFO L231 Difference]: Finished difference. Result has 360 places, 804 transitions, 14137 flow [2024-06-14 12:23:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13765, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14137, PETRI_PLACES=360, PETRI_TRANSITIONS=804} [2024-06-14 12:23:13,380 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 314 predicate places. [2024-06-14 12:23:13,380 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 804 transitions, 14137 flow [2024-06-14 12:23:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:13,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:13,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:13,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:23:13,381 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:13,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1090381405, now seen corresponding path program 16 times [2024-06-14 12:23:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667052243] [2024-06-14 12:23:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:14,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:14,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667052243] [2024-06-14 12:23:14,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667052243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:14,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862036242] [2024-06-14 12:23:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:14,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:14,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 804 transitions, 14137 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) [2024-06-14 12:23:14,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:14,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:14,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:17,059 INFO L124 PetriNetUnfolderBase]: 5936/9155 cut-off events. [2024-06-14 12:23:17,060 INFO L125 PetriNetUnfolderBase]: For 1240668/1240671 co-relation queries the response was YES. [2024-06-14 12:23:17,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91709 conditions, 9155 events. 5936/9155 cut-off events. For 1240668/1240671 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 55219 event pairs, 1953 based on Foata normal form. 10/9156 useless extension candidates. Maximal degree in co-relation 91545. Up to 8504 conditions per place. [2024-06-14 12:23:17,200 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 789 selfloop transitions, 51 changer transitions 0/850 dead transitions. [2024-06-14 12:23:17,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 850 transitions, 16831 flow [2024-06-14 12:23:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:23:17,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345679012345679 [2024-06-14 12:23:17,202 INFO L175 Difference]: Start difference. First operand has 360 places, 804 transitions, 14137 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:23:17,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 850 transitions, 16831 flow [2024-06-14 12:23:19,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 850 transitions, 16691 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:19,429 INFO L231 Difference]: Finished difference. Result has 365 places, 813 transitions, 14391 flow [2024-06-14 12:23:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=14001, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14391, PETRI_PLACES=365, PETRI_TRANSITIONS=813} [2024-06-14 12:23:19,429 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 319 predicate places. [2024-06-14 12:23:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 813 transitions, 14391 flow [2024-06-14 12:23:19,429 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) [2024-06-14 12:23:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:19,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:23:19,430 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -369675141, now seen corresponding path program 1 times [2024-06-14 12:23:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052204883] [2024-06-14 12:23:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:19,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:20,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:20,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052204883] [2024-06-14 12:23:20,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052204883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:20,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:20,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997412008] [2024-06-14 12:23:20,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:20,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:20,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:23:20,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 813 transitions, 14391 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:20,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:20,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:23:20,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:23,410 INFO L124 PetriNetUnfolderBase]: 6728/10118 cut-off events. [2024-06-14 12:23:23,410 INFO L125 PetriNetUnfolderBase]: For 1255921/1255921 co-relation queries the response was YES. [2024-06-14 12:23:23,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98998 conditions, 10118 events. 6728/10118 cut-off events. For 1255921/1255921 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 58335 event pairs, 2327 based on Foata normal form. 2/10118 useless extension candidates. Maximal degree in co-relation 98834. Up to 9758 conditions per place. [2024-06-14 12:23:23,564 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 811 selfloop transitions, 30 changer transitions 0/849 dead transitions. [2024-06-14 12:23:23,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 849 transitions, 16354 flow [2024-06-14 12:23:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:23:23,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39753086419753086 [2024-06-14 12:23:23,565 INFO L175 Difference]: Start difference. First operand has 365 places, 813 transitions, 14391 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:23:23,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 849 transitions, 16354 flow [2024-06-14 12:23:25,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 849 transitions, 15496 flow, removed 122 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:25,487 INFO L231 Difference]: Finished difference. Result has 365 places, 820 transitions, 13753 flow [2024-06-14 12:23:25,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13557, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13753, PETRI_PLACES=365, PETRI_TRANSITIONS=820} [2024-06-14 12:23:25,488 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 319 predicate places. [2024-06-14 12:23:25,488 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 820 transitions, 13753 flow [2024-06-14 12:23:25,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:25,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:25,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:25,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:23:25,489 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)] === [2024-06-14 12:23:25,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -185787943, now seen corresponding path program 17 times [2024-06-14 12:23:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067471971] [2024-06-14 12:23:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:25,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:26,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067471971] [2024-06-14 12:23:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067471971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:26,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:26,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:26,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656834941] [2024-06-14 12:23:26,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:26,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:26,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:26,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 820 transitions, 13753 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) [2024-06-14 12:23:26,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:26,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:29,493 INFO L124 PetriNetUnfolderBase]: 6055/9338 cut-off events. [2024-06-14 12:23:29,493 INFO L125 PetriNetUnfolderBase]: For 1259141/1259144 co-relation queries the response was YES. [2024-06-14 12:23:29,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92504 conditions, 9338 events. 6055/9338 cut-off events. For 1259141/1259144 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 56643 event pairs, 1884 based on Foata normal form. 10/9341 useless extension candidates. Maximal degree in co-relation 92339. Up to 8495 conditions per place. [2024-06-14 12:23:29,627 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 764 selfloop transitions, 94 changer transitions 0/868 dead transitions. [2024-06-14 12:23:29,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 868 transitions, 16262 flow [2024-06-14 12:23:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:23:29,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-14 12:23:29,629 INFO L175 Difference]: Start difference. First operand has 365 places, 820 transitions, 13753 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:23:29,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 868 transitions, 16262 flow [2024-06-14 12:23:32,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 868 transitions, 16194 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:23:32,080 INFO L231 Difference]: Finished difference. Result has 366 places, 829 transitions, 14178 flow [2024-06-14 12:23:32,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13685, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14178, PETRI_PLACES=366, PETRI_TRANSITIONS=829} [2024-06-14 12:23:32,081 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 320 predicate places. [2024-06-14 12:23:32,081 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 829 transitions, 14178 flow [2024-06-14 12:23:32,081 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) [2024-06-14 12:23:32,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:32,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:32,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:23:32,082 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:32,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -635908597, now seen corresponding path program 18 times [2024-06-14 12:23:32,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:32,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203414667] [2024-06-14 12:23:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:33,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:33,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203414667] [2024-06-14 12:23:33,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203414667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:33,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285226396] [2024-06-14 12:23:33,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:33,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:33,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:33,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 829 transitions, 14178 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) [2024-06-14 12:23:33,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:33,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:33,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:36,111 INFO L124 PetriNetUnfolderBase]: 6105/9419 cut-off events. [2024-06-14 12:23:36,111 INFO L125 PetriNetUnfolderBase]: For 1297266/1297269 co-relation queries the response was YES. [2024-06-14 12:23:36,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94128 conditions, 9419 events. 6105/9419 cut-off events. For 1297266/1297269 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 57297 event pairs, 1878 based on Foata normal form. 10/9422 useless extension candidates. Maximal degree in co-relation 93962. Up to 8596 conditions per place. [2024-06-14 12:23:36,231 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 775 selfloop transitions, 91 changer transitions 0/876 dead transitions. [2024-06-14 12:23:36,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 876 transitions, 16445 flow [2024-06-14 12:23:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:23:36,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-14 12:23:36,233 INFO L175 Difference]: Start difference. First operand has 366 places, 829 transitions, 14178 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:23:36,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 876 transitions, 16445 flow [2024-06-14 12:23:38,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 876 transitions, 16066 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:38,159 INFO L231 Difference]: Finished difference. Result has 368 places, 838 transitions, 14304 flow [2024-06-14 12:23:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13799, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14304, PETRI_PLACES=368, PETRI_TRANSITIONS=838} [2024-06-14 12:23:38,160 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 322 predicate places. [2024-06-14 12:23:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 838 transitions, 14304 flow [2024-06-14 12:23:38,160 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) [2024-06-14 12:23:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:23:38,161 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)] === [2024-06-14 12:23:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -635914332, now seen corresponding path program 17 times [2024-06-14 12:23:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151322155] [2024-06-14 12:23:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:38,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:39,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151322155] [2024-06-14 12:23:39,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151322155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:39,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:39,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:39,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842263047] [2024-06-14 12:23:39,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:39,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:39,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:39,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 838 transitions, 14304 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) [2024-06-14 12:23:39,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:39,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:39,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:42,638 INFO L124 PetriNetUnfolderBase]: 6082/9378 cut-off events. [2024-06-14 12:23:42,638 INFO L125 PetriNetUnfolderBase]: For 1298319/1298322 co-relation queries the response was YES. [2024-06-14 12:23:42,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93060 conditions, 9378 events. 6082/9378 cut-off events. For 1298319/1298322 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 56868 event pairs, 1927 based on Foata normal form. 12/9380 useless extension candidates. Maximal degree in co-relation 92893. Up to 8789 conditions per place. [2024-06-14 12:23:42,763 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 809 selfloop transitions, 46 changer transitions 0/865 dead transitions. [2024-06-14 12:23:42,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 865 transitions, 16150 flow [2024-06-14 12:23:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:23:42,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-14 12:23:42,764 INFO L175 Difference]: Start difference. First operand has 368 places, 838 transitions, 14304 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:23:42,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 865 transitions, 16150 flow [2024-06-14 12:23:44,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 865 transitions, 15675 flow, removed 153 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:44,816 INFO L231 Difference]: Finished difference. Result has 370 places, 838 transitions, 13937 flow [2024-06-14 12:23:44,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13829, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13937, PETRI_PLACES=370, PETRI_TRANSITIONS=838} [2024-06-14 12:23:44,817 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 324 predicate places. [2024-06-14 12:23:44,817 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 838 transitions, 13937 flow [2024-06-14 12:23:44,817 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) [2024-06-14 12:23:44,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:44,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:44,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:23:44,817 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:44,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -635914177, now seen corresponding path program 19 times [2024-06-14 12:23:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910904879] [2024-06-14 12:23:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:44,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:45,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:45,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910904879] [2024-06-14 12:23:45,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910904879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:45,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:45,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:45,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472515714] [2024-06-14 12:23:45,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:45,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:45,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:23:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 838 transitions, 13937 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) [2024-06-14 12:23:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:23:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:48,922 INFO L124 PetriNetUnfolderBase]: 6060/9352 cut-off events. [2024-06-14 12:23:48,923 INFO L125 PetriNetUnfolderBase]: For 1291347/1291350 co-relation queries the response was YES. [2024-06-14 12:23:49,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91552 conditions, 9352 events. 6060/9352 cut-off events. For 1291347/1291350 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 56824 event pairs, 1849 based on Foata normal form. 10/9355 useless extension candidates. Maximal degree in co-relation 91384. Up to 8307 conditions per place. [2024-06-14 12:23:49,181 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 732 selfloop transitions, 135 changer transitions 0/877 dead transitions. [2024-06-14 12:23:49,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 877 transitions, 16216 flow [2024-06-14 12:23:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:23:49,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-14 12:23:49,183 INFO L175 Difference]: Start difference. First operand has 370 places, 838 transitions, 13937 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:23:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 877 transitions, 16216 flow [2024-06-14 12:23:51,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 877 transitions, 15913 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-14 12:23:51,475 INFO L231 Difference]: Finished difference. Result has 371 places, 838 transitions, 13925 flow [2024-06-14 12:23:51,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13638, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13925, PETRI_PLACES=371, PETRI_TRANSITIONS=838} [2024-06-14 12:23:51,475 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 325 predicate places. [2024-06-14 12:23:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 838 transitions, 13925 flow [2024-06-14 12:23:51,475 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) [2024-06-14 12:23:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:23:51,476 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:51,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1675175574, now seen corresponding path program 3 times [2024-06-14 12:23:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358955530] [2024-06-14 12:23:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:52,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:52,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358955530] [2024-06-14 12:23:52,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358955530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:52,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:52,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864689430] [2024-06-14 12:23:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:52,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:52,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:52,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:23:52,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 838 transitions, 13925 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:52,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:52,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:23:52,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:55,326 INFO L124 PetriNetUnfolderBase]: 6625/10058 cut-off events. [2024-06-14 12:23:55,326 INFO L125 PetriNetUnfolderBase]: For 1290605/1290616 co-relation queries the response was YES. [2024-06-14 12:23:55,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96270 conditions, 10058 events. 6625/10058 cut-off events. For 1290605/1290616 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 59149 event pairs, 2340 based on Foata normal form. 6/10046 useless extension candidates. Maximal degree in co-relation 96101. Up to 9423 conditions per place. [2024-06-14 12:23:55,476 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 728 selfloop transitions, 15 changer transitions 0/850 dead transitions. [2024-06-14 12:23:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 850 transitions, 15500 flow [2024-06-14 12:23:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:23:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-14 12:23:55,477 INFO L175 Difference]: Start difference. First operand has 371 places, 838 transitions, 13925 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:23:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 850 transitions, 15500 flow [2024-06-14 12:23:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 850 transitions, 14674 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:58,126 INFO L231 Difference]: Finished difference. Result has 369 places, 841 transitions, 13198 flow [2024-06-14 12:23:58,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13099, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13198, PETRI_PLACES=369, PETRI_TRANSITIONS=841} [2024-06-14 12:23:58,127 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 323 predicate places. [2024-06-14 12:23:58,127 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 841 transitions, 13198 flow [2024-06-14 12:23:58,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:58,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:58,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:23:58,127 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:58,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash 160446624, now seen corresponding path program 4 times [2024-06-14 12:23:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:58,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103704568] [2024-06-14 12:23:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:59,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103704568] [2024-06-14 12:23:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103704568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:59,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:59,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901943373] [2024-06-14 12:23:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:59,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:59,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:59,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:23:59,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 841 transitions, 13198 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:59,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:59,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:23:59,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:02,111 INFO L124 PetriNetUnfolderBase]: 6622/10054 cut-off events. [2024-06-14 12:24:02,112 INFO L125 PetriNetUnfolderBase]: For 1307782/1307793 co-relation queries the response was YES. [2024-06-14 12:24:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93770 conditions, 10054 events. 6622/10054 cut-off events. For 1307782/1307793 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 59156 event pairs, 2340 based on Foata normal form. 6/10042 useless extension candidates. Maximal degree in co-relation 93601. Up to 9413 conditions per place. [2024-06-14 12:24:02,261 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 722 selfloop transitions, 21 changer transitions 0/850 dead transitions. [2024-06-14 12:24:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 850 transitions, 14716 flow [2024-06-14 12:24:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:24:02,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-14 12:24:02,262 INFO L175 Difference]: Start difference. First operand has 369 places, 841 transitions, 13198 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:24:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 850 transitions, 14716 flow [2024-06-14 12:24:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 850 transitions, 14601 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:04,433 INFO L231 Difference]: Finished difference. Result has 371 places, 841 transitions, 13131 flow [2024-06-14 12:24:04,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13083, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13131, PETRI_PLACES=371, PETRI_TRANSITIONS=841} [2024-06-14 12:24:04,434 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 325 predicate places. [2024-06-14 12:24:04,434 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 841 transitions, 13131 flow [2024-06-14 12:24:04,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:04,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:04,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:04,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:24:04,435 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:04,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 154499730, now seen corresponding path program 6 times [2024-06-14 12:24:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:04,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300064665] [2024-06-14 12:24:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:04,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:05,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:05,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300064665] [2024-06-14 12:24:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300064665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:05,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:05,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:05,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733789479] [2024-06-14 12:24:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:05,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:05,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2024-06-14 12:24:05,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 841 transitions, 13131 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:05,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:05,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2024-06-14 12:24:05,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:08,509 INFO L124 PetriNetUnfolderBase]: 6442/9874 cut-off events. [2024-06-14 12:24:08,510 INFO L125 PetriNetUnfolderBase]: For 1336271/1336285 co-relation queries the response was YES. [2024-06-14 12:24:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93023 conditions, 9874 events. 6442/9874 cut-off events. For 1336271/1336285 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 58941 event pairs, 2234 based on Foata normal form. 9/9864 useless extension candidates. Maximal degree in co-relation 92853. Up to 9059 conditions per place. [2024-06-14 12:24:08,654 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 712 selfloop transitions, 26 changer transitions 0/851 dead transitions. [2024-06-14 12:24:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 851 transitions, 14807 flow [2024-06-14 12:24:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:24:08,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-14 12:24:08,655 INFO L175 Difference]: Start difference. First operand has 371 places, 841 transitions, 13131 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:24:08,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 851 transitions, 14807 flow [2024-06-14 12:24:11,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 851 transitions, 14711 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:11,163 INFO L231 Difference]: Finished difference. Result has 371 places, 841 transitions, 13095 flow [2024-06-14 12:24:11,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=13035, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13095, PETRI_PLACES=371, PETRI_TRANSITIONS=841} [2024-06-14 12:24:11,163 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 325 predicate places. [2024-06-14 12:24:11,164 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 841 transitions, 13095 flow [2024-06-14 12:24:11,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:11,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:11,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:24:11,165 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:11,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash 680432326, now seen corresponding path program 1 times [2024-06-14 12:24:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033551186] [2024-06-14 12:24:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:11,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:11,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033551186] [2024-06-14 12:24:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033551186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:11,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:11,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793307900] [2024-06-14 12:24:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:11,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:11,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:12,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-06-14 12:24:12,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 841 transitions, 13095 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:12,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:12,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-06-14 12:24:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand