./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:59:46,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:59:46,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:59:46,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:59:46,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:59:46,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:59:46,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:59:46,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:59:46,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:59:46,448 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:59:46,448 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:59:46,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:59:46,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:59:46,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:59:46,450 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:59:46,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:59:46,451 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:59:46,451 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:59:46,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:59:46,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:59:46,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:59:46,453 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:59:46,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:59:46,454 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:59:46,454 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:59:46,454 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:59:46,455 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:59:46,455 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:59:46,455 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:59:46,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:59:46,456 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:59:46,456 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:59:46,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:59:46,457 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:59:46,457 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:59:46,458 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:59:46,458 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:59:46,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:59:46,459 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:59:46,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:59:46,459 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:59:46,460 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:59:46,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:59:46,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:59:46,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:59:46,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:59:46,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:59:46,723 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:59:46,724 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:59:46,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 20:59:46,922 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:59:46,922 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:59:46,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:59:48,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:59:48,422 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:59:48,423 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:59:48,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9581a9c/17f4320b7ef44c45b6af6fca89d5ebde/FLAGc39525279 [2024-06-27 20:59:48,449 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9581a9c/17f4320b7ef44c45b6af6fca89d5ebde [2024-06-27 20:59:48,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:59:48,451 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:59:48,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:59:48,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:59:48,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:59:48,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:59:46" (1/2) ... [2024-06-27 20:59:48,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a69ad2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:59:48, skipping insertion in model container [2024-06-27 20:59:48,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:59:46" (1/2) ... [2024-06-27 20:59:48,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f63a984 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:59:48, skipping insertion in model container [2024-06-27 20:59:48,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:59:48" (2/2) ... [2024-06-27 20:59:48,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a69ad2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:48, skipping insertion in model container [2024-06-27 20:59:48,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:59:48" (2/2) ... [2024-06-27 20:59:48,461 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:59:48,550 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:59:48,551 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-27 20:59:48,552 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-27 20:59:48,552 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-27 20:59:48,552 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:59:48,552 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-27 20:59:48,596 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:59:49,100 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:59:49,111 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:59:49,258 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:59:49,303 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:59:49,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49 WrapperNode [2024-06-27 20:59:49,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:59:49,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:59:49,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:59:49,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:59:49,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,387 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-27 20:59:49,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:59:49,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:59:49,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:59:49,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:59:49,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,446 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]. [2024-06-27 20:59:49,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,449 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:59:49,483 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:59:49,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:59:49,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:59:49,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (1/1) ... [2024-06-27 20:59:49,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:59:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:59:49,514 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) [2024-06-27 20:59:49,540 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 [2024-06-27 20:59:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:59:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:59:49,556 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:59:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:59:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:59:49,557 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:59:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:59:49,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:59:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:59:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:59:49,559 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:59:49,719 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:59:49,722 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:59:50,046 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:59:50,046 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:59:50,285 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:59:50,286 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:59:50,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:59:50 BoogieIcfgContainer [2024-06-27 20:59:50,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:59:50,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:59:50,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:59:50,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:59:50,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:59:46" (1/4) ... [2024-06-27 20:59:50,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696d0807 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:59:50, skipping insertion in model container [2024-06-27 20:59:50,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:59:48" (2/4) ... [2024-06-27 20:59:50,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696d0807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:59:50, skipping insertion in model container [2024-06-27 20:59:50,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:59:49" (3/4) ... [2024-06-27 20:59:50,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696d0807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:59:50, skipping insertion in model container [2024-06-27 20:59:50,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:59:50" (4/4) ... [2024-06-27 20:59:50,298 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:59:50,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:59:50,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:59:50,314 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:59:50,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:59:50,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:59:50,429 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:59:50,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:59:50,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:59:50,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:59:50,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:59:50,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:59:50,459 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;@2b836fe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:59:50,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:59:50,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:59:50,466 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:59:50,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:59:50,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:59:50,467 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)] === [2024-06-27 20:59:50,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash 371187043, now seen corresponding path program 1 times [2024-06-27 20:59:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622902306] [2024-06-27 20:59:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622902306] [2024-06-27 20:59:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622902306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:51,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:51,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:59:51,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771497828] [2024-06-27 20:59:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:59:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:59:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:59:51,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:59:51,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:51,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:51,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:59:51,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:51,965 INFO L124 PetriNetUnfolderBase]: 1156/1754 cut-off events. [2024-06-27 20:59:51,966 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 20:59:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1754 events. 1156/1754 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7996 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3569. Up to 1740 conditions per place. [2024-06-27 20:59:51,983 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 20:59:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 167 flow [2024-06-27 20:59:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:59:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:59:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:59:51,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 20:59:51,997 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:59:51,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 167 flow [2024-06-27 20:59:52,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:59:52,002 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:59:52,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 20:59:52,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:59:52,008 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:59:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:52,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:52,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:59:52,009 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)] === [2024-06-27 20:59:52,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 229573720, now seen corresponding path program 1 times [2024-06-27 20:59:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796425443] [2024-06-27 20:59:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:52,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796425443] [2024-06-27 20:59:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796425443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:52,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:59:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446254858] [2024-06-27 20:59:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:59:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:59:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:59:52,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:59:52,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:52,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:52,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:59:52,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:52,939 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-27 20:59:52,940 INFO L125 PetriNetUnfolderBase]: For 327/334 co-relation queries the response was YES. [2024-06-27 20:59:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4052 conditions, 1745 events. 1150/1745 cut-off events. For 327/334 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7836 event pairs, 699 based on Foata normal form. 7/1749 useless extension candidates. Maximal degree in co-relation 4040. Up to 1716 conditions per place. [2024-06-27 20:59:52,951 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-27 20:59:52,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 234 flow [2024-06-27 20:59:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:59:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:59:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 20:59:52,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 20:59:52,955 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-27 20:59:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 234 flow [2024-06-27 20:59:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:59:52,960 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-27 20:59:52,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:59:52,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-27 20:59:52,961 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-27 20:59:52,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:52,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:52,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:59:52,966 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)] === [2024-06-27 20:59:52,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:52,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1473147828, now seen corresponding path program 1 times [2024-06-27 20:59:52,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:52,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082757014] [2024-06-27 20:59:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:53,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:53,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082757014] [2024-06-27 20:59:53,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082757014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:53,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:53,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:59:53,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720128226] [2024-06-27 20:59:53,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:53,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:59:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:59:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:59:53,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:59:53,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:53,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:53,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:59:53,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:53,937 INFO L124 PetriNetUnfolderBase]: 1385/2086 cut-off events. [2024-06-27 20:59:53,938 INFO L125 PetriNetUnfolderBase]: For 1057/1065 co-relation queries the response was YES. [2024-06-27 20:59:53,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5365 conditions, 2086 events. 1385/2086 cut-off events. For 1057/1065 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9393 event pairs, 709 based on Foata normal form. 9/2093 useless extension candidates. Maximal degree in co-relation 5351. Up to 2043 conditions per place. [2024-06-27 20:59:53,950 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-06-27 20:59:53,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 351 flow [2024-06-27 20:59:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:59:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:59:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-27 20:59:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-27 20:59:53,956 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 109 transitions. [2024-06-27 20:59:53,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 351 flow [2024-06-27 20:59:53,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 330 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:59:53,960 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2024-06-27 20:59:53,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-06-27 20:59:53,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 20:59:53,962 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2024-06-27 20:59:53,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:53,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:53,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:53,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:59:53,962 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)] === [2024-06-27 20:59:53,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash 551950753, now seen corresponding path program 1 times [2024-06-27 20:59:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893188984] [2024-06-27 20:59:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:54,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:54,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893188984] [2024-06-27 20:59:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893188984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:54,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:54,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:59:54,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125941655] [2024-06-27 20:59:54,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:54,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:59:54,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:59:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:59:54,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:59:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:59:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:55,229 INFO L124 PetriNetUnfolderBase]: 1379/2077 cut-off events. [2024-06-27 20:59:55,229 INFO L125 PetriNetUnfolderBase]: For 1874/1893 co-relation queries the response was YES. [2024-06-27 20:59:55,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5902 conditions, 2077 events. 1379/2077 cut-off events. For 1874/1893 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9378 event pairs, 584 based on Foata normal form. 15/2090 useless extension candidates. Maximal degree in co-relation 5885. Up to 2019 conditions per place. [2024-06-27 20:59:55,243 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 59 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-27 20:59:55,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 77 transitions, 434 flow [2024-06-27 20:59:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:59:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:59:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 20:59:55,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 20:59:55,245 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 129 transitions. [2024-06-27 20:59:55,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 77 transitions, 434 flow [2024-06-27 20:59:55,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 430 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 20:59:55,249 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 256 flow [2024-06-27 20:59:55,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 20:59:55,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-27 20:59:55,250 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 256 flow [2024-06-27 20:59:55,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:55,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:55,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:59:55,251 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)] === [2024-06-27 20:59:55,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:55,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1644192203, now seen corresponding path program 1 times [2024-06-27 20:59:55,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:55,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225062500] [2024-06-27 20:59:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:55,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:56,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:56,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225062500] [2024-06-27 20:59:56,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225062500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:56,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:56,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:59:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571891765] [2024-06-27 20:59:56,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:59:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:59:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:59:56,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:59:56,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:56,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:56,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:59:56,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:56,617 INFO L124 PetriNetUnfolderBase]: 1433/2161 cut-off events. [2024-06-27 20:59:56,617 INFO L125 PetriNetUnfolderBase]: For 3177/3196 co-relation queries the response was YES. [2024-06-27 20:59:56,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6677 conditions, 2161 events. 1433/2161 cut-off events. For 3177/3196 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9842 event pairs, 449 based on Foata normal form. 30/2189 useless extension candidates. Maximal degree in co-relation 6657. Up to 1965 conditions per place. [2024-06-27 20:59:56,634 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 24 changer transitions 0/106 dead transitions. [2024-06-27 20:59:56,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 106 transitions, 644 flow [2024-06-27 20:59:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:59:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:59:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 20:59:56,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 20:59:56,636 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 256 flow. Second operand 7 states and 161 transitions. [2024-06-27 20:59:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 106 transitions, 644 flow [2024-06-27 20:59:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 106 transitions, 614 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:56,647 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 385 flow [2024-06-27 20:59:56,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-27 20:59:56,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-27 20:59:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 385 flow [2024-06-27 20:59:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:56,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:56,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:59:56,651 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)] === [2024-06-27 20:59:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -889132349, now seen corresponding path program 1 times [2024-06-27 20:59:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479611950] [2024-06-27 20:59:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:57,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:57,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479611950] [2024-06-27 20:59:57,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479611950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:57,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:57,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:59:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016610137] [2024-06-27 20:59:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:59:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:59:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:59:57,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:57,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:57,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:57,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:57,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:57,815 INFO L124 PetriNetUnfolderBase]: 1652/2476 cut-off events. [2024-06-27 20:59:57,815 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-06-27 20:59:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 2476 events. 1652/2476 cut-off events. For 6808/6808 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11403 event pairs, 663 based on Foata normal form. 4/2477 useless extension candidates. Maximal degree in co-relation 8925. Up to 2436 conditions per place. [2024-06-27 20:59:57,837 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-06-27 20:59:57,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 621 flow [2024-06-27 20:59:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:59:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:59:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-27 20:59:57,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 20:59:57,839 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 385 flow. Second operand 5 states and 83 transitions. [2024-06-27 20:59:57,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 621 flow [2024-06-27 20:59:57,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 609 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-27 20:59:57,850 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 454 flow [2024-06-27 20:59:57,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-27 20:59:57,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-27 20:59:57,853 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 454 flow [2024-06-27 20:59:57,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:57,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:57,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:57,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:59:57,854 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)] === [2024-06-27 20:59:57,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash 129836356, now seen corresponding path program 1 times [2024-06-27 20:59:57,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847833086] [2024-06-27 20:59:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847833086] [2024-06-27 20:59:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847833086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:59:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994384411] [2024-06-27 20:59:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:59:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:59:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:59:58,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 20:59:58,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:58,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:58,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 20:59:58,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:59,104 INFO L124 PetriNetUnfolderBase]: 1622/2437 cut-off events. [2024-06-27 20:59:59,105 INFO L125 PetriNetUnfolderBase]: For 8685/8744 co-relation queries the response was YES. [2024-06-27 20:59:59,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 2437 events. 1622/2437 cut-off events. For 8685/8744 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11228 event pairs, 603 based on Foata normal form. 24/2447 useless extension candidates. Maximal degree in co-relation 9560. Up to 2334 conditions per place. [2024-06-27 20:59:59,140 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 24 changer transitions 0/103 dead transitions. [2024-06-27 20:59:59,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 790 flow [2024-06-27 20:59:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:59:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:59:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:59:59,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:59:59,146 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 454 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:59:59,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 790 flow [2024-06-27 20:59:59,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 103 transitions, 784 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 20:59:59,158 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 558 flow [2024-06-27 20:59:59,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 20:59:59,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 20:59:59,159 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 558 flow [2024-06-27 20:59:59,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:59,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:59,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:59:59,160 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)] === [2024-06-27 20:59:59,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash 64954954, now seen corresponding path program 2 times [2024-06-27 20:59:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633487902] [2024-06-27 20:59:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633487902] [2024-06-27 20:59:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633487902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:59,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:59:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126461079] [2024-06-27 20:59:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:59,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:59:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:59:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:00,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:00,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 558 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:00,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:00,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:00,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:00,574 INFO L124 PetriNetUnfolderBase]: 1610/2423 cut-off events. [2024-06-27 21:00:00,574 INFO L125 PetriNetUnfolderBase]: For 11211/11280 co-relation queries the response was YES. [2024-06-27 21:00:00,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10155 conditions, 2423 events. 1610/2423 cut-off events. For 11211/11280 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11166 event pairs, 601 based on Foata normal form. 34/2443 useless extension candidates. Maximal degree in co-relation 10121. Up to 2345 conditions per place. [2024-06-27 21:00:00,595 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-27 21:00:00,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 862 flow [2024-06-27 21:00:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:00:00,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:00:00,597 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 558 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:00:00,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 862 flow [2024-06-27 21:00:00,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 821 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:00,610 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 627 flow [2024-06-27 21:00:00,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-27 21:00:00,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-27 21:00:00,612 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 627 flow [2024-06-27 21:00:00,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:00,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:00,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:00,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:00:00,613 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)] === [2024-06-27 21:00:00,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash 235657570, now seen corresponding path program 1 times [2024-06-27 21:00:00,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:00,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024560282] [2024-06-27 21:00:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:00,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:01,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024560282] [2024-06-27 21:00:01,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024560282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:01,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:01,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302092058] [2024-06-27 21:00:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:01,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:01,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:01,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 627 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:01,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:01,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:01,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:01,958 INFO L124 PetriNetUnfolderBase]: 1738/2600 cut-off events. [2024-06-27 21:00:01,958 INFO L125 PetriNetUnfolderBase]: For 12997/13000 co-relation queries the response was YES. [2024-06-27 21:00:01,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10859 conditions, 2600 events. 1738/2600 cut-off events. For 12997/13000 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11922 event pairs, 611 based on Foata normal form. 4/2601 useless extension candidates. Maximal degree in co-relation 10823. Up to 2489 conditions per place. [2024-06-27 21:00:01,976 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 102 selfloop transitions, 20 changer transitions 0/125 dead transitions. [2024-06-27 21:00:01,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1079 flow [2024-06-27 21:00:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:00:01,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:00:01,982 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 627 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:00:01,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1079 flow [2024-06-27 21:00:01,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 1008 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:01,999 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 743 flow [2024-06-27 21:00:01,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=743, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-27 21:00:02,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-27 21:00:02,001 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 743 flow [2024-06-27 21:00:02,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:02,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:02,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:02,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:00:02,002 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)] === [2024-06-27 21:00:02,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:02,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1193674702, now seen corresponding path program 2 times [2024-06-27 21:00:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:02,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089859239] [2024-06-27 21:00:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:02,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:02,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089859239] [2024-06-27 21:00:02,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089859239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:02,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:02,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:02,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973433585] [2024-06-27 21:00:02,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:02,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:02,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:02,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 743 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:02,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:02,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:02,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:03,311 INFO L124 PetriNetUnfolderBase]: 1760/2632 cut-off events. [2024-06-27 21:00:03,312 INFO L125 PetriNetUnfolderBase]: For 15702/15705 co-relation queries the response was YES. [2024-06-27 21:00:03,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11777 conditions, 2632 events. 1760/2632 cut-off events. For 15702/15705 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12061 event pairs, 622 based on Foata normal form. 6/2635 useless extension candidates. Maximal degree in co-relation 11737. Up to 2583 conditions per place. [2024-06-27 21:00:03,340 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 102 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2024-06-27 21:00:03,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 1044 flow [2024-06-27 21:00:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:00:03,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 21:00:03,343 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 743 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:00:03,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 1044 flow [2024-06-27 21:00:03,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 1028 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:03,368 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 788 flow [2024-06-27 21:00:03,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-27 21:00:03,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-27 21:00:03,370 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 788 flow [2024-06-27 21:00:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:03,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:03,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:03,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:00:03,371 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)] === [2024-06-27 21:00:03,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1286480344, now seen corresponding path program 3 times [2024-06-27 21:00:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049839634] [2024-06-27 21:00:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049839634] [2024-06-27 21:00:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049839634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:04,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:04,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:04,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827756219] [2024-06-27 21:00:04,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:04,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:04,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:04,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 788 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:04,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:04,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:04,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:04,724 INFO L124 PetriNetUnfolderBase]: 1671/2517 cut-off events. [2024-06-27 21:00:04,724 INFO L125 PetriNetUnfolderBase]: For 18490/18680 co-relation queries the response was YES. [2024-06-27 21:00:04,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11686 conditions, 2517 events. 1671/2517 cut-off events. For 18490/18680 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11728 event pairs, 553 based on Foata normal form. 27/2495 useless extension candidates. Maximal degree in co-relation 11643. Up to 2401 conditions per place. [2024-06-27 21:00:04,744 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 85 selfloop transitions, 25 changer transitions 0/121 dead transitions. [2024-06-27 21:00:04,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 121 transitions, 1062 flow [2024-06-27 21:00:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:00:04,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:00:04,746 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 788 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:00:04,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 121 transitions, 1062 flow [2024-06-27 21:00:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 121 transitions, 1021 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:04,766 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 811 flow [2024-06-27 21:00:04,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-27 21:00:04,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-27 21:00:04,767 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 811 flow [2024-06-27 21:00:04,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:04,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:04,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:04,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:00:04,768 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)] === [2024-06-27 21:00:04,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1193668192, now seen corresponding path program 3 times [2024-06-27 21:00:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:04,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050726480] [2024-06-27 21:00:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:05,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050726480] [2024-06-27 21:00:05,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050726480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:05,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172260725] [2024-06-27 21:00:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:05,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:05,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:05,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:05,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:05,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:05,970 INFO L124 PetriNetUnfolderBase]: 1742/2607 cut-off events. [2024-06-27 21:00:05,971 INFO L125 PetriNetUnfolderBase]: For 20184/20187 co-relation queries the response was YES. [2024-06-27 21:00:05,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12133 conditions, 2607 events. 1742/2607 cut-off events. For 20184/20187 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11931 event pairs, 608 based on Foata normal form. 4/2608 useless extension candidates. Maximal degree in co-relation 12090. Up to 2489 conditions per place. [2024-06-27 21:00:05,991 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 96 selfloop transitions, 24 changer transitions 0/123 dead transitions. [2024-06-27 21:00:05,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1127 flow [2024-06-27 21:00:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:00:05,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:00:05,994 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 811 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:00:05,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1127 flow [2024-06-27 21:00:06,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 123 transitions, 1062 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:06,018 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 835 flow [2024-06-27 21:00:06,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=835, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-27 21:00:06,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 21:00:06,019 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 835 flow [2024-06-27 21:00:06,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:06,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:06,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:06,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:00:06,020 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)] === [2024-06-27 21:00:06,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1286234080, now seen corresponding path program 1 times [2024-06-27 21:00:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75723021] [2024-06-27 21:00:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:06,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:07,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:07,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75723021] [2024-06-27 21:00:07,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75723021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:07,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:07,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358325983] [2024-06-27 21:00:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:07,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:07,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:07,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 835 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:07,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:07,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:07,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:07,843 INFO L124 PetriNetUnfolderBase]: 1734/2595 cut-off events. [2024-06-27 21:00:07,844 INFO L125 PetriNetUnfolderBase]: For 22547/22550 co-relation queries the response was YES. [2024-06-27 21:00:07,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12351 conditions, 2595 events. 1734/2595 cut-off events. For 22547/22550 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11861 event pairs, 600 based on Foata normal form. 6/2598 useless extension candidates. Maximal degree in co-relation 12306. Up to 2537 conditions per place. [2024-06-27 21:00:07,864 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-27 21:00:07,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 121 transitions, 1133 flow [2024-06-27 21:00:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:00:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 21:00:07,866 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 835 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:00:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 121 transitions, 1133 flow [2024-06-27 21:00:07,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 121 transitions, 1088 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:07,892 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 841 flow [2024-06-27 21:00:07,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=841, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-27 21:00:07,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-27 21:00:07,893 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 841 flow [2024-06-27 21:00:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:07,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:07,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:07,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:00:07,894 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:07,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:07,895 INFO L85 PathProgramCache]: Analyzing trace with hash -270129775, now seen corresponding path program 1 times [2024-06-27 21:00:07,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:07,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195598864] [2024-06-27 21:00:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:07,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:08,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:08,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195598864] [2024-06-27 21:00:08,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195598864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:08,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:08,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257244121] [2024-06-27 21:00:08,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:08,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:08,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:08,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 841 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:08,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:08,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:08,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:09,537 INFO L124 PetriNetUnfolderBase]: 1697/2557 cut-off events. [2024-06-27 21:00:09,537 INFO L125 PetriNetUnfolderBase]: For 25404/25476 co-relation queries the response was YES. [2024-06-27 21:00:09,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12499 conditions, 2557 events. 1697/2557 cut-off events. For 25404/25476 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11979 event pairs, 528 based on Foata normal form. 35/2540 useless extension candidates. Maximal degree in co-relation 12454. Up to 2205 conditions per place. [2024-06-27 21:00:09,558 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 96 selfloop transitions, 54 changer transitions 0/163 dead transitions. [2024-06-27 21:00:09,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 163 transitions, 1497 flow [2024-06-27 21:00:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 21:00:09,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-27 21:00:09,561 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 841 flow. Second operand 8 states and 158 transitions. [2024-06-27 21:00:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 163 transitions, 1497 flow [2024-06-27 21:00:09,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 163 transitions, 1464 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:09,586 INFO L231 Difference]: Finished difference. Result has 101 places, 121 transitions, 1119 flow [2024-06-27 21:00:09,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=101, PETRI_TRANSITIONS=121} [2024-06-27 21:00:09,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 21:00:09,587 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 121 transitions, 1119 flow [2024-06-27 21:00:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:09,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:09,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:09,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:00:09,588 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)] === [2024-06-27 21:00:09,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -270039565, now seen corresponding path program 2 times [2024-06-27 21:00:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:09,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126511301] [2024-06-27 21:00:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126511301] [2024-06-27 21:00:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126511301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:10,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:10,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083936185] [2024-06-27 21:00:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:10,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:10,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 121 transitions, 1119 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:10,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:10,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:10,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:11,339 INFO L124 PetriNetUnfolderBase]: 1708/2573 cut-off events. [2024-06-27 21:00:11,340 INFO L125 PetriNetUnfolderBase]: For 31061/31154 co-relation queries the response was YES. [2024-06-27 21:00:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13838 conditions, 2573 events. 1708/2573 cut-off events. For 31061/31154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11976 event pairs, 551 based on Foata normal form. 44/2566 useless extension candidates. Maximal degree in co-relation 13789. Up to 2395 conditions per place. [2024-06-27 21:00:11,357 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 102 selfloop transitions, 38 changer transitions 0/153 dead transitions. [2024-06-27 21:00:11,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 1507 flow [2024-06-27 21:00:11,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:00:11,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:00:11,360 INFO L175 Difference]: Start difference. First operand has 101 places, 121 transitions, 1119 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:00:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 1507 flow [2024-06-27 21:00:11,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 153 transitions, 1469 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:11,392 INFO L231 Difference]: Finished difference. Result has 108 places, 124 transitions, 1205 flow [2024-06-27 21:00:11,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=108, PETRI_TRANSITIONS=124} [2024-06-27 21:00:11,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 21:00:11,394 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 124 transitions, 1205 flow [2024-06-27 21:00:11,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:11,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:11,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:11,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:00:11,395 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)] === [2024-06-27 21:00:11,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2009885354, now seen corresponding path program 1 times [2024-06-27 21:00:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:11,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22289338] [2024-06-27 21:00:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:11,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:12,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22289338] [2024-06-27 21:00:12,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22289338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:12,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:12,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:12,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997901364] [2024-06-27 21:00:12,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:12,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:12,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:12,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:12,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 124 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:12,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:12,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:12,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:12,881 INFO L124 PetriNetUnfolderBase]: 1834/2738 cut-off events. [2024-06-27 21:00:12,881 INFO L125 PetriNetUnfolderBase]: For 31555/31558 co-relation queries the response was YES. [2024-06-27 21:00:12,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14457 conditions, 2738 events. 1834/2738 cut-off events. For 31555/31558 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12591 event pairs, 565 based on Foata normal form. 4/2739 useless extension candidates. Maximal degree in co-relation 14405. Up to 2501 conditions per place. [2024-06-27 21:00:12,908 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 136 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-27 21:00:12,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 174 transitions, 1853 flow [2024-06-27 21:00:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:00:12,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:00:12,910 INFO L175 Difference]: Start difference. First operand has 108 places, 124 transitions, 1205 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:00:12,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 174 transitions, 1853 flow [2024-06-27 21:00:12,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 174 transitions, 1748 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:12,950 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1347 flow [2024-06-27 21:00:12,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1347, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-27 21:00:12,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 21:00:12,951 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1347 flow [2024-06-27 21:00:12,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:12,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:12,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:12,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:00:12,952 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)] === [2024-06-27 21:00:12,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2013610004, now seen corresponding path program 2 times [2024-06-27 21:00:12,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:12,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591287909] [2024-06-27 21:00:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:13,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591287909] [2024-06-27 21:00:13,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591287909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:13,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:13,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355823975] [2024-06-27 21:00:13,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:13,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:13,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:13,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:13,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1347 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:13,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:13,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:13,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:14,602 INFO L124 PetriNetUnfolderBase]: 1888/2816 cut-off events. [2024-06-27 21:00:14,602 INFO L125 PetriNetUnfolderBase]: For 36318/36321 co-relation queries the response was YES. [2024-06-27 21:00:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15536 conditions, 2816 events. 1888/2816 cut-off events. For 36318/36321 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12983 event pairs, 582 based on Foata normal form. 4/2817 useless extension candidates. Maximal degree in co-relation 15481. Up to 2642 conditions per place. [2024-06-27 21:00:14,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 150 selfloop transitions, 33 changer transitions 0/186 dead transitions. [2024-06-27 21:00:14,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 1970 flow [2024-06-27 21:00:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:00:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:00:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:00:14,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 21:00:14,622 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1347 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:00:14,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 1970 flow [2024-06-27 21:00:14,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1900 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:14,663 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1444 flow [2024-06-27 21:00:14,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1444, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-27 21:00:14,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-27 21:00:14,664 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1444 flow [2024-06-27 21:00:14,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:14,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:14,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:14,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:00:14,665 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)] === [2024-06-27 21:00:14,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2013604424, now seen corresponding path program 3 times [2024-06-27 21:00:14,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:14,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639472373] [2024-06-27 21:00:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639472373] [2024-06-27 21:00:15,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639472373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:15,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:15,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:15,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579763562] [2024-06-27 21:00:15,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:15,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:15,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:15,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:15,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:15,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:15,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1444 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:15,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:15,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:15,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:16,098 INFO L124 PetriNetUnfolderBase]: 1878/2802 cut-off events. [2024-06-27 21:00:16,098 INFO L125 PetriNetUnfolderBase]: For 39479/39482 co-relation queries the response was YES. [2024-06-27 21:00:16,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15729 conditions, 2802 events. 1878/2802 cut-off events. For 39479/39482 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12877 event pairs, 582 based on Foata normal form. 4/2803 useless extension candidates. Maximal degree in co-relation 15671. Up to 2634 conditions per place. [2024-06-27 21:00:16,116 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 141 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2024-06-27 21:00:16,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1880 flow [2024-06-27 21:00:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:00:16,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:00:16,118 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1444 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:00:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1880 flow [2024-06-27 21:00:16,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 176 transitions, 1828 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:16,177 INFO L231 Difference]: Finished difference. Result has 123 places, 145 transitions, 1464 flow [2024-06-27 21:00:16,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1464, PETRI_PLACES=123, PETRI_TRANSITIONS=145} [2024-06-27 21:00:16,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-27 21:00:16,178 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 145 transitions, 1464 flow [2024-06-27 21:00:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:00:16,179 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)] === [2024-06-27 21:00:16,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2013604269, now seen corresponding path program 3 times [2024-06-27 21:00:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734498533] [2024-06-27 21:00:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734498533] [2024-06-27 21:00:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734498533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:17,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483451993] [2024-06-27 21:00:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:17,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:17,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 145 transitions, 1464 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:17,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:17,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:17,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:17,926 INFO L124 PetriNetUnfolderBase]: 1871/2806 cut-off events. [2024-06-27 21:00:17,926 INFO L125 PetriNetUnfolderBase]: For 48960/49054 co-relation queries the response was YES. [2024-06-27 21:00:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2806 events. 1871/2806 cut-off events. For 48960/49054 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13233 event pairs, 549 based on Foata normal form. 10/2764 useless extension candidates. Maximal degree in co-relation 16401. Up to 2549 conditions per place. [2024-06-27 21:00:17,948 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 126 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-27 21:00:17,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 2135 flow [2024-06-27 21:00:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:00:17,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-27 21:00:17,950 INFO L175 Difference]: Start difference. First operand has 123 places, 145 transitions, 1464 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:00:17,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 2135 flow [2024-06-27 21:00:18,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 190 transitions, 2071 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:18,004 INFO L231 Difference]: Finished difference. Result has 125 places, 155 transitions, 1626 flow [2024-06-27 21:00:18,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1626, PETRI_PLACES=125, PETRI_TRANSITIONS=155} [2024-06-27 21:00:18,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-27 21:00:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 155 transitions, 1626 flow [2024-06-27 21:00:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:18,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:00:18,007 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)] === [2024-06-27 21:00:18,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1226184150, now seen corresponding path program 4 times [2024-06-27 21:00:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138912139] [2024-06-27 21:00:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138912139] [2024-06-27 21:00:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138912139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:18,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159590232] [2024-06-27 21:00:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:18,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:18,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:18,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 155 transitions, 1626 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:18,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:18,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:19,436 INFO L124 PetriNetUnfolderBase]: 1962/2921 cut-off events. [2024-06-27 21:00:19,436 INFO L125 PetriNetUnfolderBase]: For 48861/48864 co-relation queries the response was YES. [2024-06-27 21:00:19,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17084 conditions, 2921 events. 1962/2921 cut-off events. For 48861/48864 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13489 event pairs, 605 based on Foata normal form. 4/2922 useless extension candidates. Maximal degree in co-relation 17022. Up to 2749 conditions per place. [2024-06-27 21:00:19,453 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 159 selfloop transitions, 28 changer transitions 0/190 dead transitions. [2024-06-27 21:00:19,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 190 transitions, 2201 flow [2024-06-27 21:00:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:00:19,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:00:19,454 INFO L175 Difference]: Start difference. First operand has 125 places, 155 transitions, 1626 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:00:19,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 190 transitions, 2201 flow [2024-06-27 21:00:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 2100 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:19,509 INFO L231 Difference]: Finished difference. Result has 129 places, 159 transitions, 1641 flow [2024-06-27 21:00:19,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1641, PETRI_PLACES=129, PETRI_TRANSITIONS=159} [2024-06-27 21:00:19,510 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-27 21:00:19,511 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 159 transitions, 1641 flow [2024-06-27 21:00:19,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:19,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:19,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:00:19,511 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)] === [2024-06-27 21:00:19,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1226184305, now seen corresponding path program 4 times [2024-06-27 21:00:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:19,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153835056] [2024-06-27 21:00:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:20,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:20,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153835056] [2024-06-27 21:00:20,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153835056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:20,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:20,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427392203] [2024-06-27 21:00:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:20,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:20,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 159 transitions, 1641 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:20,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:20,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:20,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:21,054 INFO L124 PetriNetUnfolderBase]: 1877/2819 cut-off events. [2024-06-27 21:00:21,055 INFO L125 PetriNetUnfolderBase]: For 56690/56771 co-relation queries the response was YES. [2024-06-27 21:00:21,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17009 conditions, 2819 events. 1877/2819 cut-off events. For 56690/56771 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13225 event pairs, 558 based on Foata normal form. 19/2787 useless extension candidates. Maximal degree in co-relation 16945. Up to 2629 conditions per place. [2024-06-27 21:00:21,074 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 36 changer transitions 0/189 dead transitions. [2024-06-27 21:00:21,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 189 transitions, 2075 flow [2024-06-27 21:00:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:00:21,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 21:00:21,076 INFO L175 Difference]: Start difference. First operand has 129 places, 159 transitions, 1641 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:00:21,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 189 transitions, 2075 flow [2024-06-27 21:00:21,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 189 transitions, 1965 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:21,130 INFO L231 Difference]: Finished difference. Result has 130 places, 161 transitions, 1645 flow [2024-06-27 21:00:21,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1645, PETRI_PLACES=130, PETRI_TRANSITIONS=161} [2024-06-27 21:00:21,130 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-27 21:00:21,131 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 1645 flow [2024-06-27 21:00:21,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-27 21:00:21,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:21,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:21,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:00:21,131 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)] === [2024-06-27 21:00:21,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1650781581, now seen corresponding path program 1 times [2024-06-27 21:00:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:21,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576162068] [2024-06-27 21:00:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:22,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576162068] [2024-06-27 21:00:22,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576162068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:22,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:22,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596579922] [2024-06-27 21:00:22,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:22,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:22,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:22,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 1645 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:22,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:22,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:22,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:22,644 INFO L124 PetriNetUnfolderBase]: 1949/2903 cut-off events. [2024-06-27 21:00:22,645 INFO L125 PetriNetUnfolderBase]: For 55774/55777 co-relation queries the response was YES. [2024-06-27 21:00:22,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17099 conditions, 2903 events. 1949/2903 cut-off events. For 55774/55777 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13386 event pairs, 596 based on Foata normal form. 4/2904 useless extension candidates. Maximal degree in co-relation 17035. Up to 2836 conditions per place. [2024-06-27 21:00:22,663 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 161 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-27 21:00:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 2077 flow [2024-06-27 21:00:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 21:00:22,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:00:22,664 INFO L175 Difference]: Start difference. First operand has 130 places, 161 transitions, 1645 flow. Second operand 6 states and 98 transitions. [2024-06-27 21:00:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 181 transitions, 2077 flow [2024-06-27 21:00:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 1991 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:22,723 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 1637 flow [2024-06-27 21:00:22,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1637, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-06-27 21:00:22,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-27 21:00:22,723 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 1637 flow [2024-06-27 21:00:22,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:22,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:22,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:22,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:00:22,724 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)] === [2024-06-27 21:00:22,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1650991048, now seen corresponding path program 5 times [2024-06-27 21:00:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992845317] [2024-06-27 21:00:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:22,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:23,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:23,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992845317] [2024-06-27 21:00:23,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992845317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:23,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:23,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:23,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357884691] [2024-06-27 21:00:23,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:23,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:23,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 1637 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:23,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:23,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:24,040 INFO L124 PetriNetUnfolderBase]: 1971/2935 cut-off events. [2024-06-27 21:00:24,040 INFO L125 PetriNetUnfolderBase]: For 61144/61147 co-relation queries the response was YES. [2024-06-27 21:00:24,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 2935 events. 1971/2935 cut-off events. For 61144/61147 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13548 event pairs, 600 based on Foata normal form. 4/2936 useless extension candidates. Maximal degree in co-relation 17630. Up to 2750 conditions per place. [2024-06-27 21:00:24,061 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 163 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-27 21:00:24,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2215 flow [2024-06-27 21:00:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:00:24,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:00:24,062 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 1637 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:00:24,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2215 flow [2024-06-27 21:00:24,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 195 transitions, 2179 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:24,124 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1695 flow [2024-06-27 21:00:24,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=134, PETRI_TRANSITIONS=167} [2024-06-27 21:00:24,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-27 21:00:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1695 flow [2024-06-27 21:00:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:24,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:24,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:24,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:00:24,125 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)] === [2024-06-27 21:00:24,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1218826920, now seen corresponding path program 6 times [2024-06-27 21:00:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255716546] [2024-06-27 21:00:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:24,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:24,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255716546] [2024-06-27 21:00:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255716546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:24,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:24,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366863204] [2024-06-27 21:00:24,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:24,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:24,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:24,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 167 transitions, 1695 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:24,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:24,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:24,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:25,372 INFO L124 PetriNetUnfolderBase]: 1961/2921 cut-off events. [2024-06-27 21:00:25,372 INFO L125 PetriNetUnfolderBase]: For 65103/65106 co-relation queries the response was YES. [2024-06-27 21:00:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17847 conditions, 2921 events. 1961/2921 cut-off events. For 65103/65106 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13475 event pairs, 594 based on Foata normal form. 6/2924 useless extension candidates. Maximal degree in co-relation 17781. Up to 2849 conditions per place. [2024-06-27 21:00:25,393 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 172 selfloop transitions, 15 changer transitions 0/190 dead transitions. [2024-06-27 21:00:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 190 transitions, 2143 flow [2024-06-27 21:00:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:00:25,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:00:25,394 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1695 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:00:25,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 190 transitions, 2143 flow [2024-06-27 21:00:25,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 190 transitions, 2095 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:25,457 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1697 flow [2024-06-27 21:00:25,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2024-06-27 21:00:25,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-27 21:00:25,457 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1697 flow [2024-06-27 21:00:25,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:25,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:25,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:00:25,458 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:25,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash 706653034, now seen corresponding path program 1 times [2024-06-27 21:00:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:25,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663997175] [2024-06-27 21:00:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:25,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:25,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663997175] [2024-06-27 21:00:25,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663997175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:25,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:25,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904681246] [2024-06-27 21:00:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:26,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:26,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1697 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:26,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:26,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:26,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:26,444 INFO L124 PetriNetUnfolderBase]: 1864/2806 cut-off events. [2024-06-27 21:00:26,444 INFO L125 PetriNetUnfolderBase]: For 69935/69958 co-relation queries the response was YES. [2024-06-27 21:00:26,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17383 conditions, 2806 events. 1864/2806 cut-off events. For 69935/69958 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13089 event pairs, 576 based on Foata normal form. 17/2811 useless extension candidates. Maximal degree in co-relation 17316. Up to 2695 conditions per place. [2024-06-27 21:00:26,465 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 147 selfloop transitions, 15 changer transitions 0/177 dead transitions. [2024-06-27 21:00:26,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 177 transitions, 2043 flow [2024-06-27 21:00:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:00:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:00:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-27 21:00:26,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 21:00:26,466 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1697 flow. Second operand 5 states and 83 transitions. [2024-06-27 21:00:26,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 177 transitions, 2043 flow [2024-06-27 21:00:26,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 2003 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:26,516 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1696 flow [2024-06-27 21:00:26,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1696, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2024-06-27 21:00:26,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-27 21:00:26,517 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1696 flow [2024-06-27 21:00:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:26,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:26,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:26,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:00:26,517 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)] === [2024-06-27 21:00:26,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2120866845, now seen corresponding path program 1 times [2024-06-27 21:00:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:26,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134141545] [2024-06-27 21:00:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:27,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134141545] [2024-06-27 21:00:27,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134141545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:27,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:27,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:27,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412730670] [2024-06-27 21:00:27,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:27,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:27,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:27,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1696 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:27,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:27,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:27,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:28,079 INFO L124 PetriNetUnfolderBase]: 1891/2843 cut-off events. [2024-06-27 21:00:28,079 INFO L125 PetriNetUnfolderBase]: For 80885/81001 co-relation queries the response was YES. [2024-06-27 21:00:28,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18057 conditions, 2843 events. 1891/2843 cut-off events. For 80885/81001 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13379 event pairs, 408 based on Foata normal form. 20/2807 useless extension candidates. Maximal degree in co-relation 17989. Up to 2494 conditions per place. [2024-06-27 21:00:28,097 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 61 changer transitions 0/217 dead transitions. [2024-06-27 21:00:28,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 217 transitions, 2361 flow [2024-06-27 21:00:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:00:28,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 21:00:28,098 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1696 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:00:28,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 217 transitions, 2361 flow [2024-06-27 21:00:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 217 transitions, 2318 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:28,159 INFO L231 Difference]: Finished difference. Result has 145 places, 177 transitions, 1908 flow [2024-06-27 21:00:28,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1908, PETRI_PLACES=145, PETRI_TRANSITIONS=177} [2024-06-27 21:00:28,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 21:00:28,160 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 177 transitions, 1908 flow [2024-06-27 21:00:28,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:28,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:28,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:00:28,160 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)] === [2024-06-27 21:00:28,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2120863931, now seen corresponding path program 1 times [2024-06-27 21:00:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:28,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512616594] [2024-06-27 21:00:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:28,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512616594] [2024-06-27 21:00:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512616594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:29,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:29,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135679857] [2024-06-27 21:00:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:29,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:29,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 177 transitions, 1908 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:29,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:29,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:29,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:29,742 INFO L124 PetriNetUnfolderBase]: 1996/2976 cut-off events. [2024-06-27 21:00:29,742 INFO L125 PetriNetUnfolderBase]: For 80470/80473 co-relation queries the response was YES. [2024-06-27 21:00:29,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19030 conditions, 2976 events. 1996/2976 cut-off events. For 80470/80473 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13838 event pairs, 488 based on Foata normal form. 4/2977 useless extension candidates. Maximal degree in co-relation 18960. Up to 2494 conditions per place. [2024-06-27 21:00:29,763 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 170 selfloop transitions, 69 changer transitions 0/242 dead transitions. [2024-06-27 21:00:29,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 242 transitions, 2920 flow [2024-06-27 21:00:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:00:29,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-27 21:00:29,765 INFO L175 Difference]: Start difference. First operand has 145 places, 177 transitions, 1908 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:00:29,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 242 transitions, 2920 flow [2024-06-27 21:00:29,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 242 transitions, 2838 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:29,819 INFO L231 Difference]: Finished difference. Result has 153 places, 194 transitions, 2235 flow [2024-06-27 21:00:29,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2235, PETRI_PLACES=153, PETRI_TRANSITIONS=194} [2024-06-27 21:00:29,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-27 21:00:29,820 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 194 transitions, 2235 flow [2024-06-27 21:00:29,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:29,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:29,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:29,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:00:29,821 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)] === [2024-06-27 21:00:29,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 215912293, now seen corresponding path program 2 times [2024-06-27 21:00:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:29,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390003286] [2024-06-27 21:00:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:30,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:30,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390003286] [2024-06-27 21:00:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390003286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:30,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:30,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548129127] [2024-06-27 21:00:30,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:30,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:30,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 194 transitions, 2235 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:30,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:30,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:30,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:31,547 INFO L124 PetriNetUnfolderBase]: 1951/2931 cut-off events. [2024-06-27 21:00:31,547 INFO L125 PetriNetUnfolderBase]: For 96214/96279 co-relation queries the response was YES. [2024-06-27 21:00:31,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20244 conditions, 2931 events. 1951/2931 cut-off events. For 96214/96279 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13930 event pairs, 500 based on Foata normal form. 8/2877 useless extension candidates. Maximal degree in co-relation 20169. Up to 2633 conditions per place. [2024-06-27 21:00:31,570 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 143 selfloop transitions, 67 changer transitions 0/237 dead transitions. [2024-06-27 21:00:31,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 237 transitions, 2783 flow [2024-06-27 21:00:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:00:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:00:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:00:31,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-27 21:00:31,572 INFO L175 Difference]: Start difference. First operand has 153 places, 194 transitions, 2235 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:00:31,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 237 transitions, 2783 flow [2024-06-27 21:00:31,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 237 transitions, 2690 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:31,652 INFO L231 Difference]: Finished difference. Result has 159 places, 196 transitions, 2314 flow [2024-06-27 21:00:31,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=159, PETRI_TRANSITIONS=196} [2024-06-27 21:00:31,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 21:00:31,653 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 196 transitions, 2314 flow [2024-06-27 21:00:31,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:31,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:31,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:31,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:00:31,653 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:31,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1357928879, now seen corresponding path program 2 times [2024-06-27 21:00:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836263755] [2024-06-27 21:00:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:31,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:32,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836263755] [2024-06-27 21:00:32,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836263755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:32,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:32,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:32,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940998655] [2024-06-27 21:00:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:32,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:32,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:32,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 196 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:32,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:32,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:32,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:33,287 INFO L124 PetriNetUnfolderBase]: 2043/3047 cut-off events. [2024-06-27 21:00:33,287 INFO L125 PetriNetUnfolderBase]: For 93630/93633 co-relation queries the response was YES. [2024-06-27 21:00:33,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20649 conditions, 3047 events. 2043/3047 cut-off events. For 93630/93633 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14267 event pairs, 505 based on Foata normal form. 4/3048 useless extension candidates. Maximal degree in co-relation 20573. Up to 2712 conditions per place. [2024-06-27 21:00:33,307 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 176 selfloop transitions, 60 changer transitions 0/239 dead transitions. [2024-06-27 21:00:33,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 239 transitions, 3035 flow [2024-06-27 21:00:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:00:33,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:00:33,308 INFO L175 Difference]: Start difference. First operand has 159 places, 196 transitions, 2314 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:00:33,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 239 transitions, 3035 flow [2024-06-27 21:00:33,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 239 transitions, 2897 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:33,380 INFO L231 Difference]: Finished difference. Result has 161 places, 199 transitions, 2339 flow [2024-06-27 21:00:33,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2339, PETRI_PLACES=161, PETRI_TRANSITIONS=199} [2024-06-27 21:00:33,381 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-27 21:00:33,381 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 199 transitions, 2339 flow [2024-06-27 21:00:33,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:33,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:33,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:33,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:00:33,381 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)] === [2024-06-27 21:00:33,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2118067421, now seen corresponding path program 3 times [2024-06-27 21:00:33,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:33,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707747567] [2024-06-27 21:00:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:34,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707747567] [2024-06-27 21:00:34,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707747567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:34,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:34,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:34,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094613320] [2024-06-27 21:00:34,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:34,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:34,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:34,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:34,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 199 transitions, 2339 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:34,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:34,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:34,897 INFO L124 PetriNetUnfolderBase]: 2065/3079 cut-off events. [2024-06-27 21:00:34,897 INFO L125 PetriNetUnfolderBase]: For 99955/99958 co-relation queries the response was YES. [2024-06-27 21:00:34,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21145 conditions, 3079 events. 2065/3079 cut-off events. For 99955/99958 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14410 event pairs, 505 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 21068. Up to 2717 conditions per place. [2024-06-27 21:00:34,920 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 177 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-27 21:00:34,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 3106 flow [2024-06-27 21:00:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:00:34,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:00:34,922 INFO L175 Difference]: Start difference. First operand has 161 places, 199 transitions, 2339 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:00:34,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 3106 flow [2024-06-27 21:00:35,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 245 transitions, 2972 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:35,035 INFO L231 Difference]: Finished difference. Result has 164 places, 204 transitions, 2414 flow [2024-06-27 21:00:35,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2414, PETRI_PLACES=164, PETRI_TRANSITIONS=204} [2024-06-27 21:00:35,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 21:00:35,035 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 204 transitions, 2414 flow [2024-06-27 21:00:35,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:35,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:35,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:00:35,036 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)] === [2024-06-27 21:00:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2002776251, now seen corresponding path program 4 times [2024-06-27 21:00:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732066114] [2024-06-27 21:00:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:35,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732066114] [2024-06-27 21:00:35,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732066114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:35,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:35,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402670966] [2024-06-27 21:00:35,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:35,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:35,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:36,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:36,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 2414 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:36,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:36,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:36,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:36,695 INFO L124 PetriNetUnfolderBase]: 2119/3157 cut-off events. [2024-06-27 21:00:36,695 INFO L125 PetriNetUnfolderBase]: For 108374/108377 co-relation queries the response was YES. [2024-06-27 21:00:36,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 3157 events. 2119/3157 cut-off events. For 108374/108377 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14815 event pairs, 525 based on Foata normal form. 4/3158 useless extension candidates. Maximal degree in co-relation 21943. Up to 2905 conditions per place. [2024-06-27 21:00:36,724 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 202 selfloop transitions, 44 changer transitions 0/249 dead transitions. [2024-06-27 21:00:36,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 249 transitions, 3221 flow [2024-06-27 21:00:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:00:36,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:00:36,726 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 2414 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:00:36,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 249 transitions, 3221 flow [2024-06-27 21:00:36,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 249 transitions, 3128 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:36,845 INFO L231 Difference]: Finished difference. Result has 169 places, 211 transitions, 2524 flow [2024-06-27 21:00:36,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2524, PETRI_PLACES=169, PETRI_TRANSITIONS=211} [2024-06-27 21:00:36,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-27 21:00:36,845 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 211 transitions, 2524 flow [2024-06-27 21:00:36,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:36,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:36,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:00:36,846 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)] === [2024-06-27 21:00:36,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2002776375, now seen corresponding path program 3 times [2024-06-27 21:00:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328084854] [2024-06-27 21:00:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328084854] [2024-06-27 21:00:37,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328084854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:37,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:37,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485525095] [2024-06-27 21:00:37,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:37,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:37,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 211 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:37,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:37,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:37,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:38,550 INFO L124 PetriNetUnfolderBase]: 2115/3181 cut-off events. [2024-06-27 21:00:38,551 INFO L125 PetriNetUnfolderBase]: For 130579/130644 co-relation queries the response was YES. [2024-06-27 21:00:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22929 conditions, 3181 events. 2115/3181 cut-off events. For 130579/130644 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15286 event pairs, 516 based on Foata normal form. 18/3135 useless extension candidates. Maximal degree in co-relation 22847. Up to 2822 conditions per place. [2024-06-27 21:00:38,579 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 173 selfloop transitions, 52 changer transitions 0/257 dead transitions. [2024-06-27 21:00:38,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 257 transitions, 3314 flow [2024-06-27 21:00:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:00:38,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-27 21:00:38,580 INFO L175 Difference]: Start difference. First operand has 169 places, 211 transitions, 2524 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:00:38,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 257 transitions, 3314 flow [2024-06-27 21:00:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 257 transitions, 3242 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:38,696 INFO L231 Difference]: Finished difference. Result has 173 places, 214 transitions, 2613 flow [2024-06-27 21:00:38,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2613, PETRI_PLACES=173, PETRI_TRANSITIONS=214} [2024-06-27 21:00:38,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-27 21:00:38,697 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 214 transitions, 2613 flow [2024-06-27 21:00:38,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:38,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:38,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:00:38,698 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)] === [2024-06-27 21:00:38,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash 334004747, now seen corresponding path program 5 times [2024-06-27 21:00:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601378661] [2024-06-27 21:00:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:39,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:39,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601378661] [2024-06-27 21:00:39,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601378661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:39,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:39,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:39,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171374684] [2024-06-27 21:00:39,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:39,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:39,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:39,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 214 transitions, 2613 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:39,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:39,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:40,373 INFO L124 PetriNetUnfolderBase]: 2215/3307 cut-off events. [2024-06-27 21:00:40,373 INFO L125 PetriNetUnfolderBase]: For 122402/122405 co-relation queries the response was YES. [2024-06-27 21:00:40,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23639 conditions, 3307 events. 2215/3307 cut-off events. For 122402/122405 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15709 event pairs, 533 based on Foata normal form. 4/3308 useless extension candidates. Maximal degree in co-relation 23555. Up to 3116 conditions per place. [2024-06-27 21:00:40,397 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 215 selfloop transitions, 35 changer transitions 0/253 dead transitions. [2024-06-27 21:00:40,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 3265 flow [2024-06-27 21:00:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:00:40,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 21:00:40,398 INFO L175 Difference]: Start difference. First operand has 173 places, 214 transitions, 2613 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:00:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 3265 flow [2024-06-27 21:00:40,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 253 transitions, 3146 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:40,513 INFO L231 Difference]: Finished difference. Result has 175 places, 217 transitions, 2626 flow [2024-06-27 21:00:40,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2626, PETRI_PLACES=175, PETRI_TRANSITIONS=217} [2024-06-27 21:00:40,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-27 21:00:40,513 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 217 transitions, 2626 flow [2024-06-27 21:00:40,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:40,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:40,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:00:40,514 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)] === [2024-06-27 21:00:40,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:40,514 INFO L85 PathProgramCache]: Analyzing trace with hash 334177727, now seen corresponding path program 6 times [2024-06-27 21:00:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:40,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217191938] [2024-06-27 21:00:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:40,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:41,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:41,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217191938] [2024-06-27 21:00:41,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217191938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:41,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:41,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700851970] [2024-06-27 21:00:41,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:41,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:41,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:41,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 217 transitions, 2626 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:41,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:41,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:41,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:42,323 INFO L124 PetriNetUnfolderBase]: 2205/3293 cut-off events. [2024-06-27 21:00:42,323 INFO L125 PetriNetUnfolderBase]: For 126937/126940 co-relation queries the response was YES. [2024-06-27 21:00:42,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23480 conditions, 3293 events. 2205/3293 cut-off events. For 126937/126940 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15630 event pairs, 533 based on Foata normal form. 4/3294 useless extension candidates. Maximal degree in co-relation 23395. Up to 3102 conditions per place. [2024-06-27 21:00:42,353 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 223 selfloop transitions, 36 changer transitions 0/262 dead transitions. [2024-06-27 21:00:42,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 262 transitions, 3284 flow [2024-06-27 21:00:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:00:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:00:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 21:00:42,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-27 21:00:42,355 INFO L175 Difference]: Start difference. First operand has 175 places, 217 transitions, 2626 flow. Second operand 11 states and 177 transitions. [2024-06-27 21:00:42,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 262 transitions, 3284 flow [2024-06-27 21:00:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 262 transitions, 3166 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:42,489 INFO L231 Difference]: Finished difference. Result has 179 places, 218 transitions, 2606 flow [2024-06-27 21:00:42,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2606, PETRI_PLACES=179, PETRI_TRANSITIONS=218} [2024-06-27 21:00:42,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-27 21:00:42,489 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 218 transitions, 2606 flow [2024-06-27 21:00:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:42,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:42,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:00:42,490 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)] === [2024-06-27 21:00:42,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2002591677, now seen corresponding path program 1 times [2024-06-27 21:00:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396321070] [2024-06-27 21:00:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:43,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:43,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396321070] [2024-06-27 21:00:43,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396321070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:43,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:43,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:43,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846422999] [2024-06-27 21:00:43,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:43,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:43,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:43,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:43,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:43,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:43,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 218 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:43,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:43,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:43,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:44,229 INFO L124 PetriNetUnfolderBase]: 2222/3320 cut-off events. [2024-06-27 21:00:44,229 INFO L125 PetriNetUnfolderBase]: For 133516/133519 co-relation queries the response was YES. [2024-06-27 21:00:44,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23685 conditions, 3320 events. 2222/3320 cut-off events. For 133516/133519 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15815 event pairs, 534 based on Foata normal form. 4/3321 useless extension candidates. Maximal degree in co-relation 23599. Up to 3184 conditions per place. [2024-06-27 21:00:44,260 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 26 changer transitions 0/250 dead transitions. [2024-06-27 21:00:44,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 250 transitions, 3206 flow [2024-06-27 21:00:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:00:44,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:00:44,262 INFO L175 Difference]: Start difference. First operand has 179 places, 218 transitions, 2606 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:00:44,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 250 transitions, 3206 flow [2024-06-27 21:00:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 250 transitions, 3130 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:00:44,400 INFO L231 Difference]: Finished difference. Result has 178 places, 220 transitions, 2615 flow [2024-06-27 21:00:44,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2615, PETRI_PLACES=178, PETRI_TRANSITIONS=220} [2024-06-27 21:00:44,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 21:00:44,401 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 220 transitions, 2615 flow [2024-06-27 21:00:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:44,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:44,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:44,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:00:44,402 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)] === [2024-06-27 21:00:44,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 871071839, now seen corresponding path program 7 times [2024-06-27 21:00:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617557485] [2024-06-27 21:00:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:44,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:45,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617557485] [2024-06-27 21:00:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617557485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:45,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:45,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:45,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143811819] [2024-06-27 21:00:45,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:45,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:45,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:45,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 220 transitions, 2615 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:45,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:45,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:45,947 INFO L124 PetriNetUnfolderBase]: 2244/3352 cut-off events. [2024-06-27 21:00:45,947 INFO L125 PetriNetUnfolderBase]: For 141118/141121 co-relation queries the response was YES. [2024-06-27 21:00:45,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24202 conditions, 3352 events. 2244/3352 cut-off events. For 141118/141121 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15939 event pairs, 564 based on Foata normal form. 6/3355 useless extension candidates. Maximal degree in co-relation 24115. Up to 3257 conditions per place. [2024-06-27 21:00:45,979 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 229 selfloop transitions, 18 changer transitions 0/250 dead transitions. [2024-06-27 21:00:45,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 250 transitions, 3234 flow [2024-06-27 21:00:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:00:45,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:00:45,981 INFO L175 Difference]: Start difference. First operand has 178 places, 220 transitions, 2615 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:00:45,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 250 transitions, 3234 flow [2024-06-27 21:00:46,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 250 transitions, 3167 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:46,121 INFO L231 Difference]: Finished difference. Result has 180 places, 223 transitions, 2645 flow [2024-06-27 21:00:46,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2645, PETRI_PLACES=180, PETRI_TRANSITIONS=223} [2024-06-27 21:00:46,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-27 21:00:46,122 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 223 transitions, 2645 flow [2024-06-27 21:00:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:46,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:46,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:46,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:00:46,122 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)] === [2024-06-27 21:00:46,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash 879352745, now seen corresponding path program 1 times [2024-06-27 21:00:46,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:46,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418988937] [2024-06-27 21:00:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:46,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418988937] [2024-06-27 21:00:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418988937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:47,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:47,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93147316] [2024-06-27 21:00:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:47,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:47,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:47,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:47,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 223 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:47,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:47,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:47,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:47,965 INFO L124 PetriNetUnfolderBase]: 2239/3345 cut-off events. [2024-06-27 21:00:47,966 INFO L125 PetriNetUnfolderBase]: For 146286/146289 co-relation queries the response was YES. [2024-06-27 21:00:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24249 conditions, 3345 events. 2239/3345 cut-off events. For 146286/146289 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15901 event pairs, 562 based on Foata normal form. 4/3346 useless extension candidates. Maximal degree in co-relation 24161. Up to 3246 conditions per place. [2024-06-27 21:00:47,998 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 23 changer transitions 0/245 dead transitions. [2024-06-27 21:00:47,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 245 transitions, 3193 flow [2024-06-27 21:00:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:00:47,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:00:47,999 INFO L175 Difference]: Start difference. First operand has 180 places, 223 transitions, 2645 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:00:47,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 245 transitions, 3193 flow [2024-06-27 21:00:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 245 transitions, 3121 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:48,161 INFO L231 Difference]: Finished difference. Result has 181 places, 223 transitions, 2631 flow [2024-06-27 21:00:48,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2631, PETRI_PLACES=181, PETRI_TRANSITIONS=223} [2024-06-27 21:00:48,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-27 21:00:48,162 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 223 transitions, 2631 flow [2024-06-27 21:00:48,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:48,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:48,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:00:48,163 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)] === [2024-06-27 21:00:48,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 879352993, now seen corresponding path program 2 times [2024-06-27 21:00:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458999759] [2024-06-27 21:00:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458999759] [2024-06-27 21:00:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458999759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761381880] [2024-06-27 21:00:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:49,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:49,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 223 transitions, 2631 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:49,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:49,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:49,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:49,791 INFO L124 PetriNetUnfolderBase]: 2256/3372 cut-off events. [2024-06-27 21:00:49,791 INFO L125 PetriNetUnfolderBase]: For 155061/155064 co-relation queries the response was YES. [2024-06-27 21:00:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24524 conditions, 3372 events. 2256/3372 cut-off events. For 155061/155064 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16052 event pairs, 572 based on Foata normal form. 6/3375 useless extension candidates. Maximal degree in co-relation 24435. Up to 3282 conditions per place. [2024-06-27 21:00:49,823 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 19 changer transitions 0/247 dead transitions. [2024-06-27 21:00:49,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 3207 flow [2024-06-27 21:00:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:00:49,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:00:49,824 INFO L175 Difference]: Start difference. First operand has 181 places, 223 transitions, 2631 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:00:49,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 3207 flow [2024-06-27 21:00:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 247 transitions, 3132 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:49,971 INFO L231 Difference]: Finished difference. Result has 182 places, 225 transitions, 2632 flow [2024-06-27 21:00:49,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=182, PETRI_TRANSITIONS=225} [2024-06-27 21:00:49,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 21:00:49,972 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 225 transitions, 2632 flow [2024-06-27 21:00:49,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:49,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:49,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:49,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:00:49,972 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)] === [2024-06-27 21:00:49,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash 879649663, now seen corresponding path program 3 times [2024-06-27 21:00:49,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:49,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168206731] [2024-06-27 21:00:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168206731] [2024-06-27 21:00:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168206731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:50,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:50,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:50,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171698130] [2024-06-27 21:00:50,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:50,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:50,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:50,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 225 transitions, 2632 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:50,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:50,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:50,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:51,629 INFO L124 PetriNetUnfolderBase]: 2273/3411 cut-off events. [2024-06-27 21:00:51,629 INFO L125 PetriNetUnfolderBase]: For 165880/165880 co-relation queries the response was YES. [2024-06-27 21:00:51,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24985 conditions, 3411 events. 2273/3411 cut-off events. For 165880/165880 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16440 event pairs, 955 based on Foata normal form. 4/3413 useless extension candidates. Maximal degree in co-relation 24895. Up to 3318 conditions per place. [2024-06-27 21:00:51,662 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 19 changer transitions 0/255 dead transitions. [2024-06-27 21:00:51,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3275 flow [2024-06-27 21:00:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 21:00:51,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:00:51,663 INFO L175 Difference]: Start difference. First operand has 182 places, 225 transitions, 2632 flow. Second operand 9 states and 132 transitions. [2024-06-27 21:00:51,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3275 flow [2024-06-27 21:00:51,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 3215 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:51,845 INFO L231 Difference]: Finished difference. Result has 188 places, 231 transitions, 2711 flow [2024-06-27 21:00:51,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2711, PETRI_PLACES=188, PETRI_TRANSITIONS=231} [2024-06-27 21:00:51,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 21:00:51,846 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 231 transitions, 2711 flow [2024-06-27 21:00:51,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:51,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:51,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:00:51,847 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)] === [2024-06-27 21:00:51,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash 717074499, now seen corresponding path program 4 times [2024-06-27 21:00:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:51,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482560701] [2024-06-27 21:00:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:52,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:52,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482560701] [2024-06-27 21:00:52,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482560701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:52,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:52,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:52,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298732468] [2024-06-27 21:00:52,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:52,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:52,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 231 transitions, 2711 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:53,522 INFO L124 PetriNetUnfolderBase]: 2265/3390 cut-off events. [2024-06-27 21:00:53,522 INFO L125 PetriNetUnfolderBase]: For 169485/169496 co-relation queries the response was YES. [2024-06-27 21:00:53,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25079 conditions, 3390 events. 2265/3390 cut-off events. For 169485/169496 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16247 event pairs, 541 based on Foata normal form. 12/3399 useless extension candidates. Maximal degree in co-relation 24986. Up to 3233 conditions per place. [2024-06-27 21:00:53,556 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 30 changer transitions 0/257 dead transitions. [2024-06-27 21:00:53,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 257 transitions, 3319 flow [2024-06-27 21:00:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:00:53,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:00:53,557 INFO L175 Difference]: Start difference. First operand has 188 places, 231 transitions, 2711 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:00:53,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 257 transitions, 3319 flow [2024-06-27 21:00:53,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 257 transitions, 3260 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:53,688 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 2760 flow [2024-06-27 21:00:53,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2760, PETRI_PLACES=190, PETRI_TRANSITIONS=233} [2024-06-27 21:00:53,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-27 21:00:53,689 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 2760 flow [2024-06-27 21:00:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:53,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:00:53,689 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)] === [2024-06-27 21:00:53,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 643170689, now seen corresponding path program 8 times [2024-06-27 21:00:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495747927] [2024-06-27 21:00:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495747927] [2024-06-27 21:00:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495747927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:54,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135187723] [2024-06-27 21:00:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:54,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:54,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:54,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 233 transitions, 2760 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:54,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:54,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:54,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:55,353 INFO L124 PetriNetUnfolderBase]: 2287/3423 cut-off events. [2024-06-27 21:00:55,353 INFO L125 PetriNetUnfolderBase]: For 178782/178797 co-relation queries the response was YES. [2024-06-27 21:00:55,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25674 conditions, 3423 events. 2287/3423 cut-off events. For 178782/178797 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16411 event pairs, 579 based on Foata normal form. 16/3436 useless extension candidates. Maximal degree in co-relation 25580. Up to 3190 conditions per place. [2024-06-27 21:00:55,397 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 220 selfloop transitions, 42 changer transitions 0/265 dead transitions. [2024-06-27 21:00:55,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 265 transitions, 3419 flow [2024-06-27 21:00:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:00:55,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:00:55,398 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 2760 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:00:55,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 265 transitions, 3419 flow [2024-06-27 21:00:55,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 265 transitions, 3331 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:55,559 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 2823 flow [2024-06-27 21:00:55,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2823, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-27 21:00:55,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 21:00:55,560 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 2823 flow [2024-06-27 21:00:55,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:55,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:55,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:55,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:00:55,560 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:55,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 642992935, now seen corresponding path program 4 times [2024-06-27 21:00:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:55,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976840071] [2024-06-27 21:00:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:55,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:56,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:56,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976840071] [2024-06-27 21:00:56,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976840071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:56,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:56,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:56,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66857359] [2024-06-27 21:00:56,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:56,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:56,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:00:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 2823 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:00:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:57,264 INFO L124 PetriNetUnfolderBase]: 2277/3432 cut-off events. [2024-06-27 21:00:57,265 INFO L125 PetriNetUnfolderBase]: For 199961/200056 co-relation queries the response was YES. [2024-06-27 21:00:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25967 conditions, 3432 events. 2277/3432 cut-off events. For 199961/200056 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16764 event pairs, 425 based on Foata normal form. 33/3398 useless extension candidates. Maximal degree in co-relation 25872. Up to 2929 conditions per place. [2024-06-27 21:00:57,305 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 181 selfloop transitions, 63 changer transitions 0/285 dead transitions. [2024-06-27 21:00:57,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 285 transitions, 3676 flow [2024-06-27 21:00:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 21:00:57,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-27 21:00:57,306 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 2823 flow. Second operand 8 states and 159 transitions. [2024-06-27 21:00:57,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 285 transitions, 3676 flow [2024-06-27 21:00:57,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 285 transitions, 3540 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:57,472 INFO L231 Difference]: Finished difference. Result has 197 places, 243 transitions, 2973 flow [2024-06-27 21:00:57,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=197, PETRI_TRANSITIONS=243} [2024-06-27 21:00:57,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 21:00:57,473 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 243 transitions, 2973 flow [2024-06-27 21:00:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-27 21:00:57,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:57,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:57,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:00:57,475 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)] === [2024-06-27 21:00:57,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:57,475 INFO L85 PathProgramCache]: Analyzing trace with hash 642997709, now seen corresponding path program 9 times [2024-06-27 21:00:57,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:57,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121560145] [2024-06-27 21:00:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:58,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121560145] [2024-06-27 21:00:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121560145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:58,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177864575] [2024-06-27 21:00:58,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:58,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:58,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 243 transitions, 2973 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:59,061 INFO L124 PetriNetUnfolderBase]: 2375/3555 cut-off events. [2024-06-27 21:00:59,061 INFO L125 PetriNetUnfolderBase]: For 193036/193047 co-relation queries the response was YES. [2024-06-27 21:00:59,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26818 conditions, 3555 events. 2375/3555 cut-off events. For 193036/193047 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17191 event pairs, 579 based on Foata normal form. 12/3564 useless extension candidates. Maximal degree in co-relation 26720. Up to 3324 conditions per place. [2024-06-27 21:00:59,101 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 230 selfloop transitions, 45 changer transitions 0/278 dead transitions. [2024-06-27 21:00:59,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 278 transitions, 3674 flow [2024-06-27 21:00:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:00:59,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:00:59,102 INFO L175 Difference]: Start difference. First operand has 197 places, 243 transitions, 2973 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:00:59,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 278 transitions, 3674 flow [2024-06-27 21:00:59,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 278 transitions, 3565 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:59,348 INFO L231 Difference]: Finished difference. Result has 201 places, 246 transitions, 3027 flow [2024-06-27 21:00:59,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3027, PETRI_PLACES=201, PETRI_TRANSITIONS=246} [2024-06-27 21:00:59,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-27 21:00:59,349 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 246 transitions, 3027 flow [2024-06-27 21:00:59,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:59,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:59,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:59,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:00:59,350 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)] === [2024-06-27 21:00:59,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 642993059, now seen corresponding path program 10 times [2024-06-27 21:00:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119160844] [2024-06-27 21:00:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:00,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119160844] [2024-06-27 21:01:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119160844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:00,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:00,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488399187] [2024-06-27 21:01:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:00,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:00,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:00,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 246 transitions, 3027 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:00,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:00,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:00,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:01,000 INFO L124 PetriNetUnfolderBase]: 2381/3564 cut-off events. [2024-06-27 21:01:01,000 INFO L125 PetriNetUnfolderBase]: For 199755/199766 co-relation queries the response was YES. [2024-06-27 21:01:01,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26874 conditions, 3564 events. 2381/3564 cut-off events. For 199755/199766 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17217 event pairs, 575 based on Foata normal form. 12/3573 useless extension candidates. Maximal degree in co-relation 26775. Up to 3272 conditions per place. [2024-06-27 21:01:01,039 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 237 selfloop transitions, 51 changer transitions 0/291 dead transitions. [2024-06-27 21:01:01,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 291 transitions, 3816 flow [2024-06-27 21:01:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:01:01,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:01:01,041 INFO L175 Difference]: Start difference. First operand has 201 places, 246 transitions, 3027 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:01:01,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 291 transitions, 3816 flow [2024-06-27 21:01:01,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 291 transitions, 3686 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:01,294 INFO L231 Difference]: Finished difference. Result has 205 places, 251 transitions, 3131 flow [2024-06-27 21:01:01,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3131, PETRI_PLACES=205, PETRI_TRANSITIONS=251} [2024-06-27 21:01:01,294 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-27 21:01:01,294 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 251 transitions, 3131 flow [2024-06-27 21:01:01,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:01,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:01,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:01,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:01:01,295 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)] === [2024-06-27 21:01:01,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1350328809, now seen corresponding path program 1 times [2024-06-27 21:01:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670067835] [2024-06-27 21:01:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670067835] [2024-06-27 21:01:02,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670067835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:02,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:02,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:02,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809684891] [2024-06-27 21:01:02,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:02,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:02,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:02,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:02,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 251 transitions, 3131 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:02,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:02,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:03,430 INFO L124 PetriNetUnfolderBase]: 3253/4891 cut-off events. [2024-06-27 21:01:03,430 INFO L125 PetriNetUnfolderBase]: For 249394/249401 co-relation queries the response was YES. [2024-06-27 21:01:03,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 4891 events. 3253/4891 cut-off events. For 249394/249401 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25282 event pairs, 591 based on Foata normal form. 20/4908 useless extension candidates. Maximal degree in co-relation 36273. Up to 3667 conditions per place. [2024-06-27 21:01:03,476 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 306 selfloop transitions, 145 changer transitions 0/454 dead transitions. [2024-06-27 21:01:03,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 454 transitions, 6474 flow [2024-06-27 21:01:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 21:01:03,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 21:01:03,478 INFO L175 Difference]: Start difference. First operand has 205 places, 251 transitions, 3131 flow. Second operand 11 states and 197 transitions. [2024-06-27 21:01:03,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 454 transitions, 6474 flow [2024-06-27 21:01:03,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 454 transitions, 6309 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:03,795 INFO L231 Difference]: Finished difference. Result has 217 places, 377 transitions, 5325 flow [2024-06-27 21:01:03,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5325, PETRI_PLACES=217, PETRI_TRANSITIONS=377} [2024-06-27 21:01:03,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 21:01:03,796 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 377 transitions, 5325 flow [2024-06-27 21:01:03,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:03,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:03,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:01:03,796 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)] === [2024-06-27 21:01:03,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1878305101, now seen corresponding path program 2 times [2024-06-27 21:01:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117991823] [2024-06-27 21:01:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:04,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117991823] [2024-06-27 21:01:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117991823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:04,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:04,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:04,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707677782] [2024-06-27 21:01:04,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:04,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:04,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:04,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 377 transitions, 5325 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:04,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:04,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:04,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:06,001 INFO L124 PetriNetUnfolderBase]: 4078/6167 cut-off events. [2024-06-27 21:01:06,001 INFO L125 PetriNetUnfolderBase]: For 306783/306792 co-relation queries the response was YES. [2024-06-27 21:01:06,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47670 conditions, 6167 events. 4078/6167 cut-off events. For 306783/306792 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33849 event pairs, 914 based on Foata normal form. 22/6186 useless extension candidates. Maximal degree in co-relation 47562. Up to 4665 conditions per place. [2024-06-27 21:01:06,080 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 366 selfloop transitions, 192 changer transitions 0/561 dead transitions. [2024-06-27 21:01:06,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 561 transitions, 8638 flow [2024-06-27 21:01:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 21:01:06,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 21:01:06,082 INFO L175 Difference]: Start difference. First operand has 217 places, 377 transitions, 5325 flow. Second operand 11 states and 196 transitions. [2024-06-27 21:01:06,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 561 transitions, 8638 flow [2024-06-27 21:01:06,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 561 transitions, 8571 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 21:01:06,691 INFO L231 Difference]: Finished difference. Result has 232 places, 494 transitions, 7773 flow [2024-06-27 21:01:06,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7773, PETRI_PLACES=232, PETRI_TRANSITIONS=494} [2024-06-27 21:01:06,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-27 21:01:06,693 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 494 transitions, 7773 flow [2024-06-27 21:01:06,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:06,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:06,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:06,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:01:06,693 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)] === [2024-06-27 21:01:06,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash -452998007, now seen corresponding path program 3 times [2024-06-27 21:01:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773843655] [2024-06-27 21:01:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773843655] [2024-06-27 21:01:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773843655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:07,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:07,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509658915] [2024-06-27 21:01:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:07,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:01:07,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 494 transitions, 7773 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:07,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:07,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:01:07,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:09,220 INFO L124 PetriNetUnfolderBase]: 4776/7369 cut-off events. [2024-06-27 21:01:09,220 INFO L125 PetriNetUnfolderBase]: For 440778/440856 co-relation queries the response was YES. [2024-06-27 21:01:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60819 conditions, 7369 events. 4776/7369 cut-off events. For 440778/440856 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 43838 event pairs, 798 based on Foata normal form. 28/7344 useless extension candidates. Maximal degree in co-relation 60703. Up to 3160 conditions per place. [2024-06-27 21:01:09,305 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 261 selfloop transitions, 300 changer transitions 0/584 dead transitions. [2024-06-27 21:01:09,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 584 transitions, 10060 flow [2024-06-27 21:01:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 21:01:09,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-27 21:01:09,307 INFO L175 Difference]: Start difference. First operand has 232 places, 494 transitions, 7773 flow. Second operand 10 states and 196 transitions. [2024-06-27 21:01:09,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 584 transitions, 10060 flow [2024-06-27 21:01:10,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 584 transitions, 9973 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 21:01:10,198 INFO L231 Difference]: Finished difference. Result has 243 places, 516 transitions, 8824 flow [2024-06-27 21:01:10,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8824, PETRI_PLACES=243, PETRI_TRANSITIONS=516} [2024-06-27 21:01:10,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-27 21:01:10,199 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 516 transitions, 8824 flow [2024-06-27 21:01:10,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:10,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:10,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:10,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:01:10,200 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)] === [2024-06-27 21:01:10,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1254749625, now seen corresponding path program 4 times [2024-06-27 21:01:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:10,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329602153] [2024-06-27 21:01:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329602153] [2024-06-27 21:01:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329602153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:10,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:10,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216697993] [2024-06-27 21:01:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:10,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:10,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:10,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:01:10,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 516 transitions, 8824 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:10,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:10,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:01:10,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:12,900 INFO L124 PetriNetUnfolderBase]: 5788/8930 cut-off events. [2024-06-27 21:01:12,900 INFO L125 PetriNetUnfolderBase]: For 538055/538141 co-relation queries the response was YES. [2024-06-27 21:01:12,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76206 conditions, 8930 events. 5788/8930 cut-off events. For 538055/538141 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 55000 event pairs, 1339 based on Foata normal form. 36/8913 useless extension candidates. Maximal degree in co-relation 76085. Up to 5116 conditions per place. [2024-06-27 21:01:13,014 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 278 selfloop transitions, 396 changer transitions 0/697 dead transitions. [2024-06-27 21:01:13,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 697 transitions, 13103 flow [2024-06-27 21:01:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 21:01:13,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 21:01:13,015 INFO L175 Difference]: Start difference. First operand has 243 places, 516 transitions, 8824 flow. Second operand 10 states and 195 transitions. [2024-06-27 21:01:13,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 697 transitions, 13103 flow [2024-06-27 21:01:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 697 transitions, 12667 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:14,422 INFO L231 Difference]: Finished difference. Result has 252 places, 622 transitions, 11407 flow [2024-06-27 21:01:14,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8500, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11407, PETRI_PLACES=252, PETRI_TRANSITIONS=622} [2024-06-27 21:01:14,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-27 21:01:14,423 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 622 transitions, 11407 flow [2024-06-27 21:01:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:14,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:14,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:01:14,424 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)] === [2024-06-27 21:01:14,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1979269951, now seen corresponding path program 5 times [2024-06-27 21:01:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:14,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483378882] [2024-06-27 21:01:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:15,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483378882] [2024-06-27 21:01:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483378882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779287220] [2024-06-27 21:01:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:01:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 622 transitions, 11407 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:15,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:01:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:18,196 INFO L124 PetriNetUnfolderBase]: 6255/9699 cut-off events. [2024-06-27 21:01:18,197 INFO L125 PetriNetUnfolderBase]: For 636882/636968 co-relation queries the response was YES. [2024-06-27 21:01:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84707 conditions, 9699 events. 6255/9699 cut-off events. For 636882/636968 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 61146 event pairs, 1704 based on Foata normal form. 100/9746 useless extension candidates. Maximal degree in co-relation 84581. Up to 7167 conditions per place. [2024-06-27 21:01:18,303 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 304 selfloop transitions, 405 changer transitions 0/732 dead transitions. [2024-06-27 21:01:18,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 732 transitions, 14544 flow [2024-06-27 21:01:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 21:01:18,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775 [2024-06-27 21:01:18,379 INFO L175 Difference]: Start difference. First operand has 252 places, 622 transitions, 11407 flow. Second operand 10 states and 191 transitions. [2024-06-27 21:01:18,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 732 transitions, 14544 flow [2024-06-27 21:01:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 732 transitions, 14290 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:19,755 INFO L231 Difference]: Finished difference. Result has 260 places, 665 transitions, 13061 flow [2024-06-27 21:01:19,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11153, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13061, PETRI_PLACES=260, PETRI_TRANSITIONS=665} [2024-06-27 21:01:19,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-27 21:01:19,756 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 665 transitions, 13061 flow [2024-06-27 21:01:19,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:19,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:19,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:19,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:01:19,757 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)] === [2024-06-27 21:01:19,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash -291273747, now seen corresponding path program 6 times [2024-06-27 21:01:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:19,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083721758] [2024-06-27 21:01:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:19,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:20,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:20,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083721758] [2024-06-27 21:01:20,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083721758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:20,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:20,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143321749] [2024-06-27 21:01:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:20,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:01:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 665 transitions, 13061 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:20,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:01:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:23,348 INFO L124 PetriNetUnfolderBase]: 6392/9908 cut-off events. [2024-06-27 21:01:23,348 INFO L125 PetriNetUnfolderBase]: For 611030/611116 co-relation queries the response was YES. [2024-06-27 21:01:23,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87650 conditions, 9908 events. 6392/9908 cut-off events. For 611030/611116 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 62695 event pairs, 1577 based on Foata normal form. 76/9931 useless extension candidates. Maximal degree in co-relation 87521. Up to 6925 conditions per place. [2024-06-27 21:01:23,491 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 311 selfloop transitions, 415 changer transitions 0/749 dead transitions. [2024-06-27 21:01:23,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 749 transitions, 15792 flow [2024-06-27 21:01:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 21:01:23,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-06-27 21:01:23,492 INFO L175 Difference]: Start difference. First operand has 260 places, 665 transitions, 13061 flow. Second operand 10 states and 194 transitions. [2024-06-27 21:01:23,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 749 transitions, 15792 flow [2024-06-27 21:01:25,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 749 transitions, 14964 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:25,048 INFO L231 Difference]: Finished difference. Result has 265 places, 678 transitions, 13502 flow [2024-06-27 21:01:25,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13502, PETRI_PLACES=265, PETRI_TRANSITIONS=678} [2024-06-27 21:01:25,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-27 21:01:25,049 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 678 transitions, 13502 flow [2024-06-27 21:01:25,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:25,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:25,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:01:25,049 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)] === [2024-06-27 21:01:25,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1348454859, now seen corresponding path program 7 times [2024-06-27 21:01:25,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:25,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147002676] [2024-06-27 21:01:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:25,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:25,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147002676] [2024-06-27 21:01:25,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147002676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:25,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:25,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642303904] [2024-06-27 21:01:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:25,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:25,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:26,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:26,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 678 transitions, 13502 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:26,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:26,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:29,257 INFO L124 PetriNetUnfolderBase]: 6997/10862 cut-off events. [2024-06-27 21:01:29,258 INFO L125 PetriNetUnfolderBase]: For 645772/645781 co-relation queries the response was YES. [2024-06-27 21:01:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96830 conditions, 10862 events. 6997/10862 cut-off events. For 645772/645781 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 69682 event pairs, 1951 based on Foata normal form. 46/10905 useless extension candidates. Maximal degree in co-relation 96699. Up to 8609 conditions per place. [2024-06-27 21:01:29,544 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 493 selfloop transitions, 273 changer transitions 0/769 dead transitions. [2024-06-27 21:01:29,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 769 transitions, 16178 flow [2024-06-27 21:01:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:01:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:01:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-27 21:01:29,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 21:01:29,546 INFO L175 Difference]: Start difference. First operand has 265 places, 678 transitions, 13502 flow. Second operand 12 states and 213 transitions. [2024-06-27 21:01:29,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 769 transitions, 16178 flow [2024-06-27 21:01:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 769 transitions, 15628 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:31,318 INFO L231 Difference]: Finished difference. Result has 274 places, 692 transitions, 14080 flow [2024-06-27 21:01:31,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12966, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14080, PETRI_PLACES=274, PETRI_TRANSITIONS=692} [2024-06-27 21:01:31,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 21:01:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 692 transitions, 14080 flow [2024-06-27 21:01:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:31,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:01:31,320 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)] === [2024-06-27 21:01:31,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1348451139, now seen corresponding path program 8 times [2024-06-27 21:01:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892217533] [2024-06-27 21:01:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:32,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892217533] [2024-06-27 21:01:32,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892217533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:32,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:32,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:32,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159281134] [2024-06-27 21:01:32,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:32,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:32,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:32,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:32,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 692 transitions, 14080 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:32,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:32,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:32,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:35,493 INFO L124 PetriNetUnfolderBase]: 6869/10682 cut-off events. [2024-06-27 21:01:35,493 INFO L125 PetriNetUnfolderBase]: For 611185/611194 co-relation queries the response was YES. [2024-06-27 21:01:35,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94424 conditions, 10682 events. 6869/10682 cut-off events. For 611185/611194 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 68662 event pairs, 2021 based on Foata normal form. 66/10745 useless extension candidates. Maximal degree in co-relation 94288. Up to 8989 conditions per place. [2024-06-27 21:01:35,621 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 499 selfloop transitions, 269 changer transitions 0/771 dead transitions. [2024-06-27 21:01:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 771 transitions, 16311 flow [2024-06-27 21:01:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:01:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:01:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 220 transitions. [2024-06-27 21:01:35,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 21:01:35,623 INFO L175 Difference]: Start difference. First operand has 274 places, 692 transitions, 14080 flow. Second operand 13 states and 220 transitions. [2024-06-27 21:01:35,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 771 transitions, 16311 flow [2024-06-27 21:01:37,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 771 transitions, 15970 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:37,324 INFO L231 Difference]: Finished difference. Result has 284 places, 702 transitions, 14592 flow [2024-06-27 21:01:37,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13771, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14592, PETRI_PLACES=284, PETRI_TRANSITIONS=702} [2024-06-27 21:01:37,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 21:01:37,325 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 702 transitions, 14592 flow [2024-06-27 21:01:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:37,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:37,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:01:37,326 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)] === [2024-06-27 21:01:37,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2118118975, now seen corresponding path program 1 times [2024-06-27 21:01:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103066929] [2024-06-27 21:01:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:38,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:38,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103066929] [2024-06-27 21:01:38,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103066929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313723587] [2024-06-27 21:01:38,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:38,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:38,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 702 transitions, 14592 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:38,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:38,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:38,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:41,453 INFO L124 PetriNetUnfolderBase]: 6996/10859 cut-off events. [2024-06-27 21:01:41,454 INFO L125 PetriNetUnfolderBase]: For 567891/567896 co-relation queries the response was YES. [2024-06-27 21:01:41,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97237 conditions, 10859 events. 6996/10859 cut-off events. For 567891/567896 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 69788 event pairs, 2624 based on Foata normal form. 12/10868 useless extension candidates. Maximal degree in co-relation 97097. Up to 10412 conditions per place. [2024-06-27 21:01:41,598 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 685 selfloop transitions, 101 changer transitions 0/789 dead transitions. [2024-06-27 21:01:41,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 789 transitions, 17278 flow [2024-06-27 21:01:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:01:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:01:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-27 21:01:41,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 21:01:41,600 INFO L175 Difference]: Start difference. First operand has 284 places, 702 transitions, 14592 flow. Second operand 12 states and 194 transitions. [2024-06-27 21:01:41,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 789 transitions, 17278 flow [2024-06-27 21:01:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 789 transitions, 16742 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:01:43,426 INFO L231 Difference]: Finished difference. Result has 293 places, 739 transitions, 15251 flow [2024-06-27 21:01:43,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14094, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15251, PETRI_PLACES=293, PETRI_TRANSITIONS=739} [2024-06-27 21:01:43,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 21:01:43,427 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 739 transitions, 15251 flow [2024-06-27 21:01:43,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:43,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:43,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:01:43,428 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)] === [2024-06-27 21:01:43,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1982700355, now seen corresponding path program 9 times [2024-06-27 21:01:43,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:43,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292556034] [2024-06-27 21:01:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:44,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:44,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292556034] [2024-06-27 21:01:44,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292556034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:44,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:44,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:44,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323711153] [2024-06-27 21:01:44,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:44,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:44,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 739 transitions, 15251 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:44,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:44,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:47,820 INFO L124 PetriNetUnfolderBase]: 7260/11288 cut-off events. [2024-06-27 21:01:47,821 INFO L125 PetriNetUnfolderBase]: For 648910/648915 co-relation queries the response was YES. [2024-06-27 21:01:47,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100572 conditions, 11288 events. 7260/11288 cut-off events. For 648910/648915 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 73334 event pairs, 2661 based on Foata normal form. 62/11347 useless extension candidates. Maximal degree in co-relation 100425. Up to 10346 conditions per place. [2024-06-27 21:01:47,990 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 694 selfloop transitions, 115 changer transitions 0/812 dead transitions. [2024-06-27 21:01:47,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 812 transitions, 17599 flow [2024-06-27 21:01:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:01:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:01:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-27 21:01:47,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:01:47,992 INFO L175 Difference]: Start difference. First operand has 293 places, 739 transitions, 15251 flow. Second operand 12 states and 202 transitions. [2024-06-27 21:01:47,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 812 transitions, 17599 flow [2024-06-27 21:01:50,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 812 transitions, 17380 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 21:01:50,193 INFO L231 Difference]: Finished difference. Result has 304 places, 755 transitions, 15748 flow [2024-06-27 21:01:50,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15032, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15748, PETRI_PLACES=304, PETRI_TRANSITIONS=755} [2024-06-27 21:01:50,194 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-27 21:01:50,194 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 755 transitions, 15748 flow [2024-06-27 21:01:50,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:50,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:50,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:50,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:01:50,195 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)] === [2024-06-27 21:01:50,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1982704075, now seen corresponding path program 10 times [2024-06-27 21:01:50,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:50,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346985909] [2024-06-27 21:01:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346985909] [2024-06-27 21:01:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346985909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:51,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:51,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:51,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008040232] [2024-06-27 21:01:51,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:51,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:51,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 755 transitions, 15748 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:51,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:51,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:51,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:54,707 INFO L124 PetriNetUnfolderBase]: 7515/11698 cut-off events. [2024-06-27 21:01:54,707 INFO L125 PetriNetUnfolderBase]: For 668698/668703 co-relation queries the response was YES. [2024-06-27 21:01:54,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104831 conditions, 11698 events. 7515/11698 cut-off events. For 668698/668703 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 76505 event pairs, 2605 based on Foata normal form. 42/11737 useless extension candidates. Maximal degree in co-relation 104681. Up to 9963 conditions per place. [2024-06-27 21:01:54,881 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 690 selfloop transitions, 126 changer transitions 0/819 dead transitions. [2024-06-27 21:01:54,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 819 transitions, 18202 flow [2024-06-27 21:01:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 21:01:54,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-27 21:01:54,883 INFO L175 Difference]: Start difference. First operand has 304 places, 755 transitions, 15748 flow. Second operand 11 states and 191 transitions. [2024-06-27 21:01:54,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 819 transitions, 18202 flow [2024-06-27 21:01:56,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 819 transitions, 18021 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:56,877 INFO L231 Difference]: Finished difference. Result has 310 places, 764 transitions, 16175 flow [2024-06-27 21:01:56,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15567, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16175, PETRI_PLACES=310, PETRI_TRANSITIONS=764} [2024-06-27 21:01:56,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-27 21:01:56,878 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 764 transitions, 16175 flow [2024-06-27 21:01:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:56,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:56,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:01:56,879 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:56,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1977193825, now seen corresponding path program 11 times [2024-06-27 21:01:56,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:56,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760428728] [2024-06-27 21:01:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760428728] [2024-06-27 21:01:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760428728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:58,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:58,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:01:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041143742] [2024-06-27 21:01:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:01:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:01:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:01:58,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:58,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 764 transitions, 16175 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:58,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:58,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:58,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:01,688 INFO L124 PetriNetUnfolderBase]: 7410/11548 cut-off events. [2024-06-27 21:02:01,688 INFO L125 PetriNetUnfolderBase]: For 629105/629110 co-relation queries the response was YES. [2024-06-27 21:02:01,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101411 conditions, 11548 events. 7410/11548 cut-off events. For 629105/629110 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 75763 event pairs, 2758 based on Foata normal form. 52/11597 useless extension candidates. Maximal degree in co-relation 101259. Up to 10737 conditions per place. [2024-06-27 21:02:01,849 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 729 selfloop transitions, 95 changer transitions 0/827 dead transitions. [2024-06-27 21:02:01,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 827 transitions, 18320 flow [2024-06-27 21:02:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:02:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:02:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-27 21:02:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 21:02:01,851 INFO L175 Difference]: Start difference. First operand has 310 places, 764 transitions, 16175 flow. Second operand 13 states and 212 transitions. [2024-06-27 21:02:01,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 827 transitions, 18320 flow [2024-06-27 21:02:04,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 827 transitions, 18050 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:04,222 INFO L231 Difference]: Finished difference. Result has 317 places, 768 transitions, 16281 flow [2024-06-27 21:02:04,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15953, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16281, PETRI_PLACES=317, PETRI_TRANSITIONS=768} [2024-06-27 21:02:04,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 21:02:04,223 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 768 transitions, 16281 flow [2024-06-27 21:02:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:04,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:04,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:04,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:02:04,223 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)] === [2024-06-27 21:02:04,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1976978623, now seen corresponding path program 2 times [2024-06-27 21:02:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260022189] [2024-06-27 21:02:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:04,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260022189] [2024-06-27 21:02:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260022189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:05,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:05,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:02:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624555824] [2024-06-27 21:02:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:02:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:02:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:02:05,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:05,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 768 transitions, 16281 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:05,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:05,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:05,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:08,886 INFO L124 PetriNetUnfolderBase]: 7444/11598 cut-off events. [2024-06-27 21:02:08,886 INFO L125 PetriNetUnfolderBase]: For 564170/564175 co-relation queries the response was YES. [2024-06-27 21:02:08,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101313 conditions, 11598 events. 7444/11598 cut-off events. For 564170/564175 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 76227 event pairs, 2780 based on Foata normal form. 6/11601 useless extension candidates. Maximal degree in co-relation 101159. Up to 11061 conditions per place. [2024-06-27 21:02:09,050 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 713 selfloop transitions, 110 changer transitions 0/826 dead transitions. [2024-06-27 21:02:09,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 826 transitions, 18361 flow [2024-06-27 21:02:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:02:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:02:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-27 21:02:09,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 21:02:09,052 INFO L175 Difference]: Start difference. First operand has 317 places, 768 transitions, 16281 flow. Second operand 12 states and 194 transitions. [2024-06-27 21:02:09,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 826 transitions, 18361 flow [2024-06-27 21:02:11,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 826 transitions, 18192 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 21:02:11,372 INFO L231 Difference]: Finished difference. Result has 320 places, 777 transitions, 16543 flow [2024-06-27 21:02:11,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16112, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16543, PETRI_PLACES=320, PETRI_TRANSITIONS=777} [2024-06-27 21:02:11,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 21:02:11,373 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 777 transitions, 16543 flow [2024-06-27 21:02:11,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:11,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:11,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:11,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:02:11,373 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:11,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash -192706539, now seen corresponding path program 1 times [2024-06-27 21:02:11,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:11,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455976689] [2024-06-27 21:02:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:11,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455976689] [2024-06-27 21:02:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455976689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:11,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:11,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:02:11,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746525291] [2024-06-27 21:02:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:11,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:02:11,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:02:11,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:02:11,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:02:11,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 777 transitions, 16543 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:11,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:11,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:02:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:15,410 INFO L124 PetriNetUnfolderBase]: 7298/11399 cut-off events. [2024-06-27 21:02:15,410 INFO L125 PetriNetUnfolderBase]: For 585495/585775 co-relation queries the response was YES. [2024-06-27 21:02:15,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100538 conditions, 11399 events. 7298/11399 cut-off events. For 585495/585775 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 75640 event pairs, 2741 based on Foata normal form. 274/11606 useless extension candidates. Maximal degree in co-relation 100382. Up to 10969 conditions per place. [2024-06-27 21:02:15,566 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 724 selfloop transitions, 60 changer transitions 0/818 dead transitions. [2024-06-27 21:02:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 818 transitions, 18529 flow [2024-06-27 21:02:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:02:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 21:02:15,567 INFO L175 Difference]: Start difference. First operand has 320 places, 777 transitions, 16543 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:02:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 818 transitions, 18529 flow [2024-06-27 21:02:17,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 818 transitions, 18379 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:17,809 INFO L231 Difference]: Finished difference. Result has 323 places, 796 transitions, 16800 flow [2024-06-27 21:02:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16394, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16800, PETRI_PLACES=323, PETRI_TRANSITIONS=796} [2024-06-27 21:02:17,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-27 21:02:17,810 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 796 transitions, 16800 flow [2024-06-27 21:02:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:17,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:02:17,811 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)] === [2024-06-27 21:02:17,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1826340073, now seen corresponding path program 12 times [2024-06-27 21:02:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156606311] [2024-06-27 21:02:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:18,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156606311] [2024-06-27 21:02:18,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156606311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:18,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:02:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983590569] [2024-06-27 21:02:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:02:18,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:02:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:02:18,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:18,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 796 transitions, 16800 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:18,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:18,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:18,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand