./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:55:19,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:55:19,389 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:55:19,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:55:19,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:55:19,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:55:19,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:55:19,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:55:19,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:55:19,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:55:19,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:55:19,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:55:19,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:55:19,425 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:55:19,425 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:55:19,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:55:19,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:55:19,426 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:55:19,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:55:19,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:55:19,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:55:19,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:55:19,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:55:19,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:55:19,428 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:55:19,428 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:55:19,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:55:19,429 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:55:19,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:55:19,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:55:19,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:55:19,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:55:19,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:55:19,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:55:19,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:55:19,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:55:19,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:55:19,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:55:19,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:55:19,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:55:19,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:55:19,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:55:19,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:55:19,453 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:55:19,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:55:19,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:55:19,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:55:19,660 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:55:19,661 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:55:19,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:55:20,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:55:20,916 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:55:20,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:55:20,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5947ae34/d6c1dab3a1ef465387bb09faf92035ee/FLAGc24111681 [2024-06-03 19:55:20,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5947ae34/d6c1dab3a1ef465387bb09faf92035ee [2024-06-03 19:55:20,949 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:55:20,950 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:55:20,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:55:21,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:55:21,063 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:55:21,064 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:55:21,064 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:55:21,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:55:21,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:55:20" (1/2) ... [2024-06-03 19:55:21,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414f77b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:55:21, skipping insertion in model container [2024-06-03 19:55:21,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:55:20" (1/2) ... [2024-06-03 19:55:21,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72c8034e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:55:21, skipping insertion in model container [2024-06-03 19:55:21,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:55:21" (2/2) ... [2024-06-03 19:55:21,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414f77b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21, skipping insertion in model container [2024-06-03 19:55:21,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:55:21" (2/2) ... [2024-06-03 19:55:21,071 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:55:21,124 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:55:21,126 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 19:55:21,126 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 19:55:21,126 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 19:55:21,126 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:55:21,126 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-03 19:55:21,183 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:55:21,443 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:55:21,454 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:55:21,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:55:21,598 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:55:21,598 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21 WrapperNode [2024-06-03 19:55:21,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:55:21,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:55:21,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:55:21,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:55:21,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,649 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-03 19:55:21,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:55:21,654 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:55:21,655 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:55:21,655 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:55:21,663 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,665 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,679 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:55:21,680 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,701 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:55:21,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:55:21,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:55:21,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:55:21,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (1/1) ... [2024-06-03 19:55:21,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:55:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:55:21,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:55:21,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:55:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:55:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:55:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:55:21,816 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:55:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:55:21,816 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:55:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:55:21,817 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:55:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:55:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:55:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:55:21,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:55:21,818 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:55:21,910 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:55:21,912 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:55:22,191 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:55:22,192 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:55:22,358 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:55:22,358 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:55:22,358 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:55:22 BoogieIcfgContainer [2024-06-03 19:55:22,358 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:55:22,360 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:55:22,360 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:55:22,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:55:22,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:55:20" (1/4) ... [2024-06-03 19:55:22,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c77a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:55:22, skipping insertion in model container [2024-06-03 19:55:22,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:55:21" (2/4) ... [2024-06-03 19:55:22,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c77a76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:55:22, skipping insertion in model container [2024-06-03 19:55:22,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:55:21" (3/4) ... [2024-06-03 19:55:22,364 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c77a76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:55:22, skipping insertion in model container [2024-06-03 19:55:22,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:55:22" (4/4) ... [2024-06-03 19:55:22,365 INFO L112 eAbstractionObserver]: Analyzing ICFG mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:55:22,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:55:22,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:55:22,377 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:55:22,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:55:22,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:55:22,476 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 19:55:22,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:55:22,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:55:22,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 19:55:22,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 19:55:22,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:55:22,501 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;@2d23439b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:55:22,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:55:22,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:55:22,505 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:55:22,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:55:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:22,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:55:22,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:22,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1495991067, now seen corresponding path program 1 times [2024-06-03 19:55:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492963209] [2024-06-03 19:55:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492963209] [2024-06-03 19:55:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492963209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:23,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:23,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:55:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038336169] [2024-06-03 19:55:23,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:23,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:55:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:55:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:55:23,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:55:23,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:23,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:23,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:55:23,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:23,743 INFO L124 PetriNetUnfolderBase]: 1659/2478 cut-off events. [2024-06-03 19:55:23,744 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-03 19:55:23,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 2478 events. 1659/2478 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11231 event pairs, 1184 based on Foata normal form. 1/2438 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-03 19:55:23,759 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 19:55:23,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 177 flow [2024-06-03 19:55:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:55:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:55:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-03 19:55:23,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 19:55:23,770 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-03 19:55:23,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 177 flow [2024-06-03 19:55:23,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:23,776 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 19:55:23,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 19:55:23,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 19:55:23,780 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 19:55:23,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:23,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:23,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:23,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:55:23,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:23,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1166657604, now seen corresponding path program 1 times [2024-06-03 19:55:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:23,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364685881] [2024-06-03 19:55:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:24,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364685881] [2024-06-03 19:55:24,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364685881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:24,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:24,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:55:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559881730] [2024-06-03 19:55:24,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:55:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:55:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:55:24,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:55:24,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:24,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:55:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:24,651 INFO L124 PetriNetUnfolderBase]: 1653/2469 cut-off events. [2024-06-03 19:55:24,651 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-03 19:55:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5660 conditions, 2469 events. 1653/2469 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11184 event pairs, 1038 based on Foata normal form. 3/2471 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-03 19:55:24,663 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 19:55:24,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 244 flow [2024-06-03 19:55:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:55:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:55:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-03 19:55:24,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 19:55:24,667 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 88 transitions. [2024-06-03 19:55:24,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 244 flow [2024-06-03 19:55:24,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:55:24,670 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 19:55:24,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:55:24,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 19:55:24,671 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 19:55:24,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:24,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:24,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:24,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:55:24,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:24,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1806648318, now seen corresponding path program 1 times [2024-06-03 19:55:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512066305] [2024-06-03 19:55:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:24,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512066305] [2024-06-03 19:55:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512066305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:25,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:25,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:55:25,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933269499] [2024-06-03 19:55:25,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:55:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:55:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:55:25,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:55:25,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:25,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:25,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:55:25,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:25,532 INFO L124 PetriNetUnfolderBase]: 1661/2482 cut-off events. [2024-06-03 19:55:25,533 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-03 19:55:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6310 conditions, 2482 events. 1661/2482 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11227 event pairs, 812 based on Foata normal form. 5/2486 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-03 19:55:25,544 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-03 19:55:25,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 398 flow [2024-06-03 19:55:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:55:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:55:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 19:55:25,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 19:55:25,546 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 115 transitions. [2024-06-03 19:55:25,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 398 flow [2024-06-03 19:55:25,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:55:25,548 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-03 19:55:25,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-03 19:55:25,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 19:55:25,549 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-03 19:55:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:25,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:25,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:25,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:55:25,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:25,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:25,550 INFO L85 PathProgramCache]: Analyzing trace with hash 171524003, now seen corresponding path program 1 times [2024-06-03 19:55:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:25,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241348034] [2024-06-03 19:55:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:25,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:26,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:26,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241348034] [2024-06-03 19:55:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241348034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:26,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:26,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:55:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683738813] [2024-06-03 19:55:26,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:55:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:55:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:55:26,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:55:26,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:26,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:26,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:55:26,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:26,582 INFO L124 PetriNetUnfolderBase]: 1669/2494 cut-off events. [2024-06-03 19:55:26,583 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-03 19:55:26,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 2494 events. 1669/2494 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11291 event pairs, 666 based on Foata normal form. 7/2500 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-03 19:55:26,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-03 19:55:26,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 525 flow [2024-06-03 19:55:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 19:55:26,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 19:55:26,595 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-03 19:55:26,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 525 flow [2024-06-03 19:55:26,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:55:26,599 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-03 19:55:26,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-03 19:55:26,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-03 19:55:26,600 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-03 19:55:26,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:26,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:26,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:26,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:55:26,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:26,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1022277821, now seen corresponding path program 1 times [2024-06-03 19:55:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:26,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238299139] [2024-06-03 19:55:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:26,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238299139] [2024-06-03 19:55:27,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238299139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:27,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:27,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684616877] [2024-06-03 19:55:27,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:27,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 19:55:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:27,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:27,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 19:55:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:27,919 INFO L124 PetriNetUnfolderBase]: 1681/2514 cut-off events. [2024-06-03 19:55:27,920 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-03 19:55:27,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 2514 events. 1681/2514 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11394 event pairs, 502 based on Foata normal form. 12/2525 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-03 19:55:27,934 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 66 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-03 19:55:27,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 626 flow [2024-06-03 19:55:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 19:55:27,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-03 19:55:27,935 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 7 states and 151 transitions. [2024-06-03 19:55:27,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 626 flow [2024-06-03 19:55:27,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:27,940 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 335 flow [2024-06-03 19:55:27,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-03 19:55:27,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 19:55:27,940 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 335 flow [2024-06-03 19:55:27,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:27,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:27,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:55:27,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:27,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash 552327518, now seen corresponding path program 1 times [2024-06-03 19:55:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:27,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081367568] [2024-06-03 19:55:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:27,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:28,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081367568] [2024-06-03 19:55:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081367568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:28,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:55:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865109248] [2024-06-03 19:55:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:55:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:55:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:55:28,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:28,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:28,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:28,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:28,833 INFO L124 PetriNetUnfolderBase]: 1676/2506 cut-off events. [2024-06-03 19:55:28,834 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-03 19:55:28,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8825 conditions, 2506 events. 1676/2506 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11331 event pairs, 659 based on Foata normal form. 2/2507 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-03 19:55:28,855 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 55 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-03 19:55:28,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 489 flow [2024-06-03 19:55:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:55:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:55:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-03 19:55:28,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-03 19:55:28,857 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 335 flow. Second operand 5 states and 87 transitions. [2024-06-03 19:55:28,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 489 flow [2024-06-03 19:55:28,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:28,862 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 295 flow [2024-06-03 19:55:28,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-03 19:55:28,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 19:55:28,865 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 295 flow [2024-06-03 19:55:28,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:28,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:28,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:28,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:55:28,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:28,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -58839168, now seen corresponding path program 1 times [2024-06-03 19:55:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:28,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527512187] [2024-06-03 19:55:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:28,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:29,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:29,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527512187] [2024-06-03 19:55:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527512187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:29,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384408262] [2024-06-03 19:55:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:29,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:29,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:29,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:29,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:29,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:29,932 INFO L124 PetriNetUnfolderBase]: 1708/2552 cut-off events. [2024-06-03 19:55:29,933 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-06-03 19:55:29,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 2552 events. 1708/2552 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11525 event pairs, 621 based on Foata normal form. 10/2561 useless extension candidates. Maximal degree in co-relation 8905. Up to 2402 conditions per place. [2024-06-03 19:55:29,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-06-03 19:55:29,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 613 flow [2024-06-03 19:55:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 19:55:29,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-03 19:55:29,945 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 295 flow. Second operand 6 states and 116 transitions. [2024-06-03 19:55:29,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 613 flow [2024-06-03 19:55:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 591 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:29,950 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 404 flow [2024-06-03 19:55:29,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-03 19:55:29,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-03 19:55:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 404 flow [2024-06-03 19:55:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:29,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:29,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:29,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:55:29,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:29,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1540263943, now seen corresponding path program 1 times [2024-06-03 19:55:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259356065] [2024-06-03 19:55:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259356065] [2024-06-03 19:55:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259356065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:30,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:30,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693704296] [2024-06-03 19:55:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:30,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:30,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:30,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:30,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:30,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:30,827 INFO L124 PetriNetUnfolderBase]: 1714/2562 cut-off events. [2024-06-03 19:55:30,827 INFO L125 PetriNetUnfolderBase]: For 10528/10532 co-relation queries the response was YES. [2024-06-03 19:55:30,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10004 conditions, 2562 events. 1714/2562 cut-off events. For 10528/10532 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11627 event pairs, 648 based on Foata normal form. 8/2569 useless extension candidates. Maximal degree in co-relation 9976. Up to 2464 conditions per place. [2024-06-03 19:55:30,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-03 19:55:30,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 676 flow [2024-06-03 19:55:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 19:55:30,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 19:55:30,843 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 404 flow. Second operand 6 states and 111 transitions. [2024-06-03 19:55:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 676 flow [2024-06-03 19:55:30,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 658 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 19:55:30,851 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 458 flow [2024-06-03 19:55:30,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-03 19:55:30,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-03 19:55:30,853 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 458 flow [2024-06-03 19:55:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:30,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:30,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:55:30,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:30,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1789165315, now seen corresponding path program 2 times [2024-06-03 19:55:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049677692] [2024-06-03 19:55:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049677692] [2024-06-03 19:55:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049677692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369784842] [2024-06-03 19:55:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:31,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:31,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:31,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:31,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:31,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:31,877 INFO L124 PetriNetUnfolderBase]: 1699/2536 cut-off events. [2024-06-03 19:55:31,877 INFO L125 PetriNetUnfolderBase]: For 11815/11815 co-relation queries the response was YES. [2024-06-03 19:55:31,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10105 conditions, 2536 events. 1699/2536 cut-off events. For 11815/11815 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11446 event pairs, 644 based on Foata normal form. 2/2537 useless extension candidates. Maximal degree in co-relation 10074. Up to 2505 conditions per place. [2024-06-03 19:55:31,891 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-03 19:55:31,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 658 flow [2024-06-03 19:55:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:55:31,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:55:31,892 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 458 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:55:31,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 658 flow [2024-06-03 19:55:31,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 629 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:31,900 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 459 flow [2024-06-03 19:55:31,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-03 19:55:31,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-03 19:55:31,901 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 459 flow [2024-06-03 19:55:31,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:31,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:31,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:55:31,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 170082911, now seen corresponding path program 1 times [2024-06-03 19:55:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728758196] [2024-06-03 19:55:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728758196] [2024-06-03 19:55:32,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728758196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:32,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:32,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696110486] [2024-06-03 19:55:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:32,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:33,037 INFO L124 PetriNetUnfolderBase]: 2147/3164 cut-off events. [2024-06-03 19:55:33,038 INFO L125 PetriNetUnfolderBase]: For 16980/16980 co-relation queries the response was YES. [2024-06-03 19:55:33,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12614 conditions, 3164 events. 2147/3164 cut-off events. For 16980/16980 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14624 event pairs, 595 based on Foata normal form. 20/3183 useless extension candidates. Maximal degree in co-relation 12582. Up to 2491 conditions per place. [2024-06-03 19:55:33,055 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 97 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-03 19:55:33,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 1042 flow [2024-06-03 19:55:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:55:33,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-03 19:55:33,057 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 459 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:55:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 1042 flow [2024-06-03 19:55:33,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 995 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:33,070 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 655 flow [2024-06-03 19:55:33,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-03 19:55:33,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 19:55:33,073 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 655 flow [2024-06-03 19:55:33,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:33,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:33,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:55:33,074 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:33,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash 588776901, now seen corresponding path program 2 times [2024-06-03 19:55:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:33,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831541446] [2024-06-03 19:55:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:33,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:33,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831541446] [2024-06-03 19:55:33,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831541446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:33,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:33,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807705232] [2024-06-03 19:55:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:33,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:33,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:33,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:33,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:33,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:34,242 INFO L124 PetriNetUnfolderBase]: 2211/3254 cut-off events. [2024-06-03 19:55:34,242 INFO L125 PetriNetUnfolderBase]: For 22821/22821 co-relation queries the response was YES. [2024-06-03 19:55:34,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15335 conditions, 3254 events. 2211/3254 cut-off events. For 22821/22821 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14985 event pairs, 681 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 15299. Up to 3156 conditions per place. [2024-06-03 19:55:34,291 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 98 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-03 19:55:34,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 1084 flow [2024-06-03 19:55:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:55:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-03 19:55:34,293 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 655 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:55:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 1084 flow [2024-06-03 19:55:34,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1044 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-03 19:55:34,309 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 790 flow [2024-06-03 19:55:34,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-03 19:55:34,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-03 19:55:34,310 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 790 flow [2024-06-03 19:55:34,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:34,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:34,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:55:34,311 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:34,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1012438069, now seen corresponding path program 3 times [2024-06-03 19:55:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460759507] [2024-06-03 19:55:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:34,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:34,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:34,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460759507] [2024-06-03 19:55:34,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460759507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:34,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:34,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505428085] [2024-06-03 19:55:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:34,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:34,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:34,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:34,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:34,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:35,487 INFO L124 PetriNetUnfolderBase]: 2243/3300 cut-off events. [2024-06-03 19:55:35,487 INFO L125 PetriNetUnfolderBase]: For 26184/26184 co-relation queries the response was YES. [2024-06-03 19:55:35,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15994 conditions, 3300 events. 2243/3300 cut-off events. For 26184/26184 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15286 event pairs, 671 based on Foata normal form. 10/3309 useless extension candidates. Maximal degree in co-relation 15952. Up to 3078 conditions per place. [2024-06-03 19:55:35,509 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 104 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-03 19:55:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 134 transitions, 1274 flow [2024-06-03 19:55:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:55:35,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-03 19:55:35,510 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 790 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:55:35,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 134 transitions, 1274 flow [2024-06-03 19:55:35,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 134 transitions, 1225 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:35,528 INFO L231 Difference]: Finished difference. Result has 88 places, 106 transitions, 910 flow [2024-06-03 19:55:35,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=88, PETRI_TRANSITIONS=106} [2024-06-03 19:55:35,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-03 19:55:35,529 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 106 transitions, 910 flow [2024-06-03 19:55:35,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:35,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:35,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:35,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:55:35,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:35,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash -709822081, now seen corresponding path program 1 times [2024-06-03 19:55:35,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:35,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806380303] [2024-06-03 19:55:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:36,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:36,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806380303] [2024-06-03 19:55:36,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806380303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:36,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:36,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:36,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723753120] [2024-06-03 19:55:36,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:36,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:36,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:36,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:36,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 106 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:36,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:36,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:36,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:37,111 INFO L124 PetriNetUnfolderBase]: 2306/3401 cut-off events. [2024-06-03 19:55:37,112 INFO L125 PetriNetUnfolderBase]: For 31509/31509 co-relation queries the response was YES. [2024-06-03 19:55:37,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16984 conditions, 3401 events. 2306/3401 cut-off events. For 31509/31509 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15851 event pairs, 665 based on Foata normal form. 18/3418 useless extension candidates. Maximal degree in co-relation 16940. Up to 3147 conditions per place. [2024-06-03 19:55:37,133 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-03 19:55:37,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 143 transitions, 1364 flow [2024-06-03 19:55:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:55:37,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-03 19:55:37,135 INFO L175 Difference]: Start difference. First operand has 88 places, 106 transitions, 910 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:55:37,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 143 transitions, 1364 flow [2024-06-03 19:55:37,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1311 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:37,158 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 945 flow [2024-06-03 19:55:37,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=945, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-03 19:55:37,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 19:55:37,159 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 945 flow [2024-06-03 19:55:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:37,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:37,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:55:37,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 197337773, now seen corresponding path program 1 times [2024-06-03 19:55:37,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:37,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163541995] [2024-06-03 19:55:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:37,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163541995] [2024-06-03 19:55:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163541995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:37,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:37,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:55:37,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481089917] [2024-06-03 19:55:37,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:55:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:55:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:55:37,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:37,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 945 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:37,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:37,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:38,135 INFO L124 PetriNetUnfolderBase]: 2297/3389 cut-off events. [2024-06-03 19:55:38,135 INFO L125 PetriNetUnfolderBase]: For 33074/33074 co-relation queries the response was YES. [2024-06-03 19:55:38,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17269 conditions, 3389 events. 2297/3389 cut-off events. For 33074/33074 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15806 event pairs, 704 based on Foata normal form. 3/3391 useless extension candidates. Maximal degree in co-relation 17223. Up to 3367 conditions per place. [2024-06-03 19:55:38,157 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 104 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-06-03 19:55:38,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 1195 flow [2024-06-03 19:55:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:55:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:55:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-03 19:55:38,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 19:55:38,159 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 945 flow. Second operand 5 states and 85 transitions. [2024-06-03 19:55:38,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 1195 flow [2024-06-03 19:55:38,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 1113 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:38,181 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 891 flow [2024-06-03 19:55:38,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=891, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-03 19:55:38,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 19:55:38,181 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 891 flow [2024-06-03 19:55:38,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:38,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:38,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:38,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:55:38,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:38,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1566381682, now seen corresponding path program 1 times [2024-06-03 19:55:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:38,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415383924] [2024-06-03 19:55:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:38,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:38,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415383924] [2024-06-03 19:55:38,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415383924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:38,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:38,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:38,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787095441] [2024-06-03 19:55:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:38,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:38,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:38,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:38,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 891 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:38,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:38,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:38,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:39,339 INFO L124 PetriNetUnfolderBase]: 2308/3406 cut-off events. [2024-06-03 19:55:39,340 INFO L125 PetriNetUnfolderBase]: For 35394/35400 co-relation queries the response was YES. [2024-06-03 19:55:39,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17348 conditions, 3406 events. 2308/3406 cut-off events. For 35394/35400 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15912 event pairs, 696 based on Foata normal form. 8/3413 useless extension candidates. Maximal degree in co-relation 17301. Up to 3268 conditions per place. [2024-06-03 19:55:39,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-03 19:55:39,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 141 transitions, 1369 flow [2024-06-03 19:55:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:55:39,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 19:55:39,361 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 891 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:55:39,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 141 transitions, 1369 flow [2024-06-03 19:55:39,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1335 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:39,384 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1003 flow [2024-06-03 19:55:39,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1003, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-03 19:55:39,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 19:55:39,384 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1003 flow [2024-06-03 19:55:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:39,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:39,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:39,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:55:39,385 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:39,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1566385402, now seen corresponding path program 2 times [2024-06-03 19:55:39,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:39,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925948615] [2024-06-03 19:55:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925948615] [2024-06-03 19:55:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925948615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:40,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516533229] [2024-06-03 19:55:40,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:40,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:40,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1003 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:40,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:40,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:40,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:40,751 INFO L124 PetriNetUnfolderBase]: 2303/3399 cut-off events. [2024-06-03 19:55:40,751 INFO L125 PetriNetUnfolderBase]: For 39822/39828 co-relation queries the response was YES. [2024-06-03 19:55:40,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17912 conditions, 3399 events. 2303/3399 cut-off events. For 39822/39828 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15873 event pairs, 701 based on Foata normal form. 8/3406 useless extension candidates. Maximal degree in co-relation 17865. Up to 3296 conditions per place. [2024-06-03 19:55:40,771 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 111 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-03 19:55:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1325 flow [2024-06-03 19:55:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:55:40,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 19:55:40,773 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1003 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:55:40,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1325 flow [2024-06-03 19:55:40,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1244 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:40,802 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 974 flow [2024-06-03 19:55:40,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-03 19:55:40,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-03 19:55:40,803 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 974 flow [2024-06-03 19:55:40,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:40,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:40,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:40,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:55:40,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1570110207, now seen corresponding path program 1 times [2024-06-03 19:55:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:40,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950872835] [2024-06-03 19:55:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950872835] [2024-06-03 19:55:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950872835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:41,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:41,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699021208] [2024-06-03 19:55:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:41,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:41,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 974 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:41,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:41,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:41,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:42,049 INFO L124 PetriNetUnfolderBase]: 2447/3604 cut-off events. [2024-06-03 19:55:42,049 INFO L125 PetriNetUnfolderBase]: For 46612/46614 co-relation queries the response was YES. [2024-06-03 19:55:42,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19246 conditions, 3604 events. 2447/3604 cut-off events. For 46612/46614 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17044 event pairs, 593 based on Foata normal form. 12/3615 useless extension candidates. Maximal degree in co-relation 19197. Up to 2727 conditions per place. [2024-06-03 19:55:42,073 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 111 selfloop transitions, 47 changer transitions 0/161 dead transitions. [2024-06-03 19:55:42,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1694 flow [2024-06-03 19:55:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:55:42,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-03 19:55:42,075 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 974 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:55:42,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1694 flow [2024-06-03 19:55:42,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 161 transitions, 1639 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:42,108 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1189 flow [2024-06-03 19:55:42,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-06-03 19:55:42,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-03 19:55:42,109 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1189 flow [2024-06-03 19:55:42,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:42,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:42,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:55:42,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:42,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1570104627, now seen corresponding path program 2 times [2024-06-03 19:55:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970274921] [2024-06-03 19:55:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970274921] [2024-06-03 19:55:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970274921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574992344] [2024-06-03 19:55:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:42,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:42,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:42,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:42,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:42,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:43,191 INFO L124 PetriNetUnfolderBase]: 2431/3584 cut-off events. [2024-06-03 19:55:43,191 INFO L125 PetriNetUnfolderBase]: For 52847/52849 co-relation queries the response was YES. [2024-06-03 19:55:43,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20444 conditions, 3584 events. 2431/3584 cut-off events. For 52847/52849 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16953 event pairs, 647 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 20392. Up to 2721 conditions per place. [2024-06-03 19:55:43,215 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 112 selfloop transitions, 50 changer transitions 0/165 dead transitions. [2024-06-03 19:55:43,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 1819 flow [2024-06-03 19:55:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 19:55:43,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 19:55:43,216 INFO L175 Difference]: Start difference. First operand has 102 places, 123 transitions, 1189 flow. Second operand 7 states and 147 transitions. [2024-06-03 19:55:43,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 1819 flow [2024-06-03 19:55:43,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1716 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:43,273 INFO L231 Difference]: Finished difference. Result has 108 places, 126 transitions, 1293 flow [2024-06-03 19:55:43,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1293, PETRI_PLACES=108, PETRI_TRANSITIONS=126} [2024-06-03 19:55:43,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-03 19:55:43,274 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 126 transitions, 1293 flow [2024-06-03 19:55:43,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:43,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:43,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:43,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:55:43,274 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:43,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1393555355, now seen corresponding path program 3 times [2024-06-03 19:55:43,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:43,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147871434] [2024-06-03 19:55:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:43,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147871434] [2024-06-03 19:55:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147871434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:43,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:43,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687807741] [2024-06-03 19:55:43,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:43,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:43,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 126 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:43,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:43,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:43,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:44,440 INFO L124 PetriNetUnfolderBase]: 2463/3629 cut-off events. [2024-06-03 19:55:44,440 INFO L125 PetriNetUnfolderBase]: For 58696/58702 co-relation queries the response was YES. [2024-06-03 19:55:44,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21511 conditions, 3629 events. 2463/3629 cut-off events. For 58696/58702 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17159 event pairs, 731 based on Foata normal form. 16/3644 useless extension candidates. Maximal degree in co-relation 21456. Up to 3464 conditions per place. [2024-06-03 19:55:44,464 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 130 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2024-06-03 19:55:44,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 156 transitions, 1773 flow [2024-06-03 19:55:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:55:44,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-03 19:55:44,465 INFO L175 Difference]: Start difference. First operand has 108 places, 126 transitions, 1293 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:55:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 156 transitions, 1773 flow [2024-06-03 19:55:44,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 156 transitions, 1673 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:44,513 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 1324 flow [2024-06-03 19:55:44,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2024-06-03 19:55:44,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-03 19:55:44,514 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 1324 flow [2024-06-03 19:55:44,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:44,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:44,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:55:44,515 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:44,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:44,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1393288228, now seen corresponding path program 1 times [2024-06-03 19:55:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091829300] [2024-06-03 19:55:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:45,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:45,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091829300] [2024-06-03 19:55:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091829300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:45,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:45,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246360946] [2024-06-03 19:55:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:45,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:45,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:45,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:45,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:45,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:45,903 INFO L124 PetriNetUnfolderBase]: 2479/3651 cut-off events. [2024-06-03 19:55:45,903 INFO L125 PetriNetUnfolderBase]: For 61962/61962 co-relation queries the response was YES. [2024-06-03 19:55:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 3651 events. 2479/3651 cut-off events. For 61962/61962 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17265 event pairs, 709 based on Foata normal form. 5/3655 useless extension candidates. Maximal degree in co-relation 21312. Up to 3514 conditions per place. [2024-06-03 19:55:45,929 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 130 selfloop transitions, 30 changer transitions 0/163 dead transitions. [2024-06-03 19:55:45,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1836 flow [2024-06-03 19:55:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 19:55:45,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-03 19:55:45,931 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 1324 flow. Second operand 7 states and 128 transitions. [2024-06-03 19:55:45,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1836 flow [2024-06-03 19:55:46,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 163 transitions, 1763 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:46,028 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1460 flow [2024-06-03 19:55:46,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1460, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-03 19:55:46,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-03 19:55:46,028 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1460 flow [2024-06-03 19:55:46,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:46,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:46,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:46,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:55:46,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:46,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1310451450, now seen corresponding path program 1 times [2024-06-03 19:55:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266144596] [2024-06-03 19:55:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266144596] [2024-06-03 19:55:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266144596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:46,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:46,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146113494] [2024-06-03 19:55:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:46,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:46,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:47,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:47,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:47,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:47,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:47,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:47,674 INFO L124 PetriNetUnfolderBase]: 2496/3679 cut-off events. [2024-06-03 19:55:47,675 INFO L125 PetriNetUnfolderBase]: For 68153/68159 co-relation queries the response was YES. [2024-06-03 19:55:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 3679 events. 2496/3679 cut-off events. For 68153/68159 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17467 event pairs, 576 based on Foata normal form. 10/3688 useless extension candidates. Maximal degree in co-relation 22593. Up to 3443 conditions per place. [2024-06-03 19:55:47,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 32 changer transitions 0/177 dead transitions. [2024-06-03 19:55:47,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 177 transitions, 2064 flow [2024-06-03 19:55:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:55:47,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 19:55:47,706 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1460 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:55:47,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 177 transitions, 2064 flow [2024-06-03 19:55:47,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1999 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:47,771 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 1566 flow [2024-06-03 19:55:47,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2024-06-03 19:55:47,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-03 19:55:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 1566 flow [2024-06-03 19:55:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:47,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:47,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:47,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:55:47,773 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:47,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1310512024, now seen corresponding path program 1 times [2024-06-03 19:55:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465989508] [2024-06-03 19:55:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:48,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:48,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465989508] [2024-06-03 19:55:48,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465989508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:48,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:48,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:48,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605744816] [2024-06-03 19:55:48,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:48,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:48,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:48,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:48,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:48,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:48,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:48,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:49,396 INFO L124 PetriNetUnfolderBase]: 2720/3993 cut-off events. [2024-06-03 19:55:49,396 INFO L125 PetriNetUnfolderBase]: For 81314/81316 co-relation queries the response was YES. [2024-06-03 19:55:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24786 conditions, 3993 events. 2720/3993 cut-off events. For 81314/81316 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19269 event pairs, 571 based on Foata normal form. 12/4004 useless extension candidates. Maximal degree in co-relation 24727. Up to 2700 conditions per place. [2024-06-03 19:55:49,429 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 146 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-03 19:55:49,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2624 flow [2024-06-03 19:55:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:55:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:55:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 19:55:49,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 19:55:49,431 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 1566 flow. Second operand 10 states and 210 transitions. [2024-06-03 19:55:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2624 flow [2024-06-03 19:55:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2534 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:49,506 INFO L231 Difference]: Finished difference. Result has 127 places, 159 transitions, 1831 flow [2024-06-03 19:55:49,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1831, PETRI_PLACES=127, PETRI_TRANSITIONS=159} [2024-06-03 19:55:49,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-03 19:55:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 159 transitions, 1831 flow [2024-06-03 19:55:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:49,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:49,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:49,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:55:49,507 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)] === [2024-06-03 19:55:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -547519622, now seen corresponding path program 2 times [2024-06-03 19:55:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:49,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589688151] [2024-06-03 19:55:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:50,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:50,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589688151] [2024-06-03 19:55:50,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589688151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:50,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:50,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565689779] [2024-06-03 19:55:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:50,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:50,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 159 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:50,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:50,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:51,131 INFO L124 PetriNetUnfolderBase]: 2712/3980 cut-off events. [2024-06-03 19:55:51,132 INFO L125 PetriNetUnfolderBase]: For 90010/90016 co-relation queries the response was YES. [2024-06-03 19:55:51,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26777 conditions, 3980 events. 2712/3980 cut-off events. For 90010/90016 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19061 event pairs, 748 based on Foata normal form. 10/3989 useless extension candidates. Maximal degree in co-relation 26714. Up to 3821 conditions per place. [2024-06-03 19:55:51,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 31 changer transitions 0/193 dead transitions. [2024-06-03 19:55:51,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2297 flow [2024-06-03 19:55:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:55:51,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 19:55:51,167 INFO L175 Difference]: Start difference. First operand has 127 places, 159 transitions, 1831 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:55:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2297 flow [2024-06-03 19:55:51,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 2120 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:51,256 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1724 flow [2024-06-03 19:55:51,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-03 19:55:51,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 19:55:51,257 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1724 flow [2024-06-03 19:55:51,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:51,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:51,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:55:51,258 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:51,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1428599704, now seen corresponding path program 2 times [2024-06-03 19:55:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:51,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759955752] [2024-06-03 19:55:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:51,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:51,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759955752] [2024-06-03 19:55:51,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759955752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:51,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683890360] [2024-06-03 19:55:51,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:51,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:52,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:52,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:52,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:52,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:52,873 INFO L124 PetriNetUnfolderBase]: 2776/4073 cut-off events. [2024-06-03 19:55:52,873 INFO L125 PetriNetUnfolderBase]: For 95402/95404 co-relation queries the response was YES. [2024-06-03 19:55:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27086 conditions, 4073 events. 2776/4073 cut-off events. For 95402/95404 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19723 event pairs, 578 based on Foata normal form. 12/4084 useless extension candidates. Maximal degree in co-relation 27021. Up to 2921 conditions per place. [2024-06-03 19:55:52,906 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 150 selfloop transitions, 67 changer transitions 0/220 dead transitions. [2024-06-03 19:55:52,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 220 transitions, 2682 flow [2024-06-03 19:55:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:55:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:55:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 19:55:52,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-03 19:55:52,908 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1724 flow. Second operand 9 states and 191 transitions. [2024-06-03 19:55:52,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 220 transitions, 2682 flow [2024-06-03 19:55:52,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 220 transitions, 2612 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:55:53,002 INFO L231 Difference]: Finished difference. Result has 133 places, 165 transitions, 1904 flow [2024-06-03 19:55:53,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1904, PETRI_PLACES=133, PETRI_TRANSITIONS=165} [2024-06-03 19:55:53,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-03 19:55:53,003 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 165 transitions, 1904 flow [2024-06-03 19:55:53,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:53,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:53,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:53,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:55:53,003 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:53,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1428784278, now seen corresponding path program 1 times [2024-06-03 19:55:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475058303] [2024-06-03 19:55:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475058303] [2024-06-03 19:55:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475058303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:53,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:53,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644450446] [2024-06-03 19:55:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:53,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:53,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 165 transitions, 1904 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) [2024-06-03 19:55:53,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:53,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:53,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:54,769 INFO L124 PetriNetUnfolderBase]: 3120/4587 cut-off events. [2024-06-03 19:55:54,769 INFO L125 PetriNetUnfolderBase]: For 125055/125057 co-relation queries the response was YES. [2024-06-03 19:55:54,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31310 conditions, 4587 events. 3120/4587 cut-off events. For 125055/125057 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22735 event pairs, 621 based on Foata normal form. 46/4632 useless extension candidates. Maximal degree in co-relation 31243. Up to 3248 conditions per place. [2024-06-03 19:55:54,807 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 165 selfloop transitions, 66 changer transitions 0/234 dead transitions. [2024-06-03 19:55:54,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 234 transitions, 2983 flow [2024-06-03 19:55:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:55:54,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 19:55:54,808 INFO L175 Difference]: Start difference. First operand has 133 places, 165 transitions, 1904 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:55:54,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 234 transitions, 2983 flow [2024-06-03 19:55:54,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 234 transitions, 2805 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:54,918 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 2247 flow [2024-06-03 19:55:54,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2247, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-03 19:55:54,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 19:55:54,918 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 2247 flow [2024-06-03 19:55:54,918 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) [2024-06-03 19:55:54,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:54,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:54,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:55:54,919 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:54,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1428777334, now seen corresponding path program 3 times [2024-06-03 19:55:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:54,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737479963] [2024-06-03 19:55:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:54,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:55,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737479963] [2024-06-03 19:55:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737479963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:55,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486370249] [2024-06-03 19:55:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:55,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:55,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 2247 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:55,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:56,655 INFO L124 PetriNetUnfolderBase]: 3156/4639 cut-off events. [2024-06-03 19:55:56,656 INFO L125 PetriNetUnfolderBase]: For 133480/133482 co-relation queries the response was YES. [2024-06-03 19:55:56,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34286 conditions, 4639 events. 3156/4639 cut-off events. For 133480/133482 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22868 event pairs, 588 based on Foata normal form. 8/4646 useless extension candidates. Maximal degree in co-relation 34214. Up to 4155 conditions per place. [2024-06-03 19:55:56,693 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 201 selfloop transitions, 48 changer transitions 0/252 dead transitions. [2024-06-03 19:55:56,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 252 transitions, 3470 flow [2024-06-03 19:55:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:55:56,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 19:55:56,694 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 2247 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:55:56,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 252 transitions, 3470 flow [2024-06-03 19:55:56,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 3386 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-03 19:55:56,834 INFO L231 Difference]: Finished difference. Result has 148 places, 214 transitions, 2782 flow [2024-06-03 19:55:56,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2782, PETRI_PLACES=148, PETRI_TRANSITIONS=214} [2024-06-03 19:55:56,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-03 19:55:56,835 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 214 transitions, 2782 flow [2024-06-03 19:55:56,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:56,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:56,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:56,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:55:56,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:56,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2082634254, now seen corresponding path program 1 times [2024-06-03 19:55:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019649252] [2024-06-03 19:55:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:56,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019649252] [2024-06-03 19:55:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019649252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:57,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:57,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117250796] [2024-06-03 19:55:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:57,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:57,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 214 transitions, 2782 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:57,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:57,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:57,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:58,081 INFO L124 PetriNetUnfolderBase]: 3171/4658 cut-off events. [2024-06-03 19:55:58,082 INFO L125 PetriNetUnfolderBase]: For 141882/141882 co-relation queries the response was YES. [2024-06-03 19:55:58,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35218 conditions, 4658 events. 3171/4658 cut-off events. For 141882/141882 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22922 event pairs, 801 based on Foata normal form. 3/4660 useless extension candidates. Maximal degree in co-relation 35140. Up to 4604 conditions per place. [2024-06-03 19:55:58,122 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 16 changer transitions 0/237 dead transitions. [2024-06-03 19:55:58,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 237 transitions, 3443 flow [2024-06-03 19:55:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:55:58,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:55:58,124 INFO L175 Difference]: Start difference. First operand has 148 places, 214 transitions, 2782 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:55:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 237 transitions, 3443 flow [2024-06-03 19:55:58,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 237 transitions, 3342 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-03 19:55:58,270 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2792 flow [2024-06-03 19:55:58,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2792, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-06-03 19:55:58,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-03 19:55:58,271 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2792 flow [2024-06-03 19:55:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:58,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:58,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:58,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:55:58,271 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:55:58,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash 524342784, now seen corresponding path program 2 times [2024-06-03 19:55:58,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:58,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028381738] [2024-06-03 19:55:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:58,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028381738] [2024-06-03 19:55:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028381738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:59,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:55:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093757718] [2024-06-03 19:55:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:55:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:55:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:55:59,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:55:59,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2792 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) [2024-06-03 19:55:59,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:59,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:55:59,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:00,148 INFO L124 PetriNetUnfolderBase]: 3287/4838 cut-off events. [2024-06-03 19:56:00,148 INFO L125 PetriNetUnfolderBase]: For 157041/157041 co-relation queries the response was YES. [2024-06-03 19:56:00,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36236 conditions, 4838 events. 3287/4838 cut-off events. For 157041/157041 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24016 event pairs, 760 based on Foata normal form. 22/4859 useless extension candidates. Maximal degree in co-relation 36156. Up to 4422 conditions per place. [2024-06-03 19:56:00,194 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 219 selfloop transitions, 45 changer transitions 0/267 dead transitions. [2024-06-03 19:56:00,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 3778 flow [2024-06-03 19:56:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:56:00,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-03 19:56:00,195 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2792 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:56:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 3778 flow [2024-06-03 19:56:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 267 transitions, 3597 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:00,345 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2949 flow [2024-06-03 19:56:00,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2949, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-03 19:56:00,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-03 19:56:00,346 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2949 flow [2024-06-03 19:56:00,346 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) [2024-06-03 19:56:00,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:00,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:00,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:56:00,346 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:00,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash 760517896, now seen corresponding path program 1 times [2024-06-03 19:56:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:00,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969673878] [2024-06-03 19:56:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:00,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:01,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969673878] [2024-06-03 19:56:01,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969673878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:01,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:01,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:01,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327119995] [2024-06-03 19:56:01,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:01,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:01,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:01,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:01,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:01,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2949 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:01,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:01,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:01,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:01,895 INFO L124 PetriNetUnfolderBase]: 3303/4862 cut-off events. [2024-06-03 19:56:01,895 INFO L125 PetriNetUnfolderBase]: For 163953/163959 co-relation queries the response was YES. [2024-06-03 19:56:01,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37249 conditions, 4862 events. 3303/4862 cut-off events. For 163953/163959 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24222 event pairs, 783 based on Foata normal form. 11/4872 useless extension candidates. Maximal degree in co-relation 37166. Up to 4629 conditions per place. [2024-06-03 19:56:01,942 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-03 19:56:01,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 260 transitions, 3721 flow [2024-06-03 19:56:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:56:01,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-03 19:56:01,943 INFO L175 Difference]: Start difference. First operand has 157 places, 228 transitions, 2949 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:56:01,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 260 transitions, 3721 flow [2024-06-03 19:56:02,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3625 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-03 19:56:02,145 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3033 flow [2024-06-03 19:56:02,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-03 19:56:02,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-03 19:56:02,145 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3033 flow [2024-06-03 19:56:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:02,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:02,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:56:02,146 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -242260718, now seen corresponding path program 3 times [2024-06-03 19:56:02,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556706807] [2024-06-03 19:56:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556706807] [2024-06-03 19:56:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556706807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:02,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966469048] [2024-06-03 19:56:02,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:02,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:02,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3033 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) [2024-06-03 19:56:02,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:02,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:02,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:04,017 INFO L124 PetriNetUnfolderBase]: 3391/5001 cut-off events. [2024-06-03 19:56:04,018 INFO L125 PetriNetUnfolderBase]: For 179434/179434 co-relation queries the response was YES. [2024-06-03 19:56:04,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 5001 events. 3391/5001 cut-off events. For 179434/179434 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25029 event pairs, 804 based on Foata normal form. 18/5018 useless extension candidates. Maximal degree in co-relation 38592. Up to 4743 conditions per place. [2024-06-03 19:56:04,056 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 33 changer transitions 0/269 dead transitions. [2024-06-03 19:56:04,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3848 flow [2024-06-03 19:56:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:56:04,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-03 19:56:04,058 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3033 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:56:04,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3848 flow [2024-06-03 19:56:04,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 269 transitions, 3732 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:04,229 INFO L231 Difference]: Finished difference. Result has 165 places, 234 transitions, 3064 flow [2024-06-03 19:56:04,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=165, PETRI_TRANSITIONS=234} [2024-06-03 19:56:04,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-03 19:56:04,229 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 234 transitions, 3064 flow [2024-06-03 19:56:04,229 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) [2024-06-03 19:56:04,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:04,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:04,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:56:04,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:04,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash 752236990, now seen corresponding path program 4 times [2024-06-03 19:56:04,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:04,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820424482] [2024-06-03 19:56:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:04,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:04,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:04,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820424482] [2024-06-03 19:56:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820424482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:04,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:04,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:56:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359450166] [2024-06-03 19:56:04,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:56:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:56:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:56:04,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:04,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 234 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:04,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:04,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:04,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:05,877 INFO L124 PetriNetUnfolderBase]: 3397/5011 cut-off events. [2024-06-03 19:56:05,878 INFO L125 PetriNetUnfolderBase]: For 183951/183957 co-relation queries the response was YES. [2024-06-03 19:56:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38920 conditions, 5011 events. 3397/5011 cut-off events. For 183951/183957 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25203 event pairs, 806 based on Foata normal form. 15/5025 useless extension candidates. Maximal degree in co-relation 38834. Up to 4809 conditions per place. [2024-06-03 19:56:05,920 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 43 changer transitions 0/277 dead transitions. [2024-06-03 19:56:05,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 277 transitions, 3984 flow [2024-06-03 19:56:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:56:05,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 19:56:05,921 INFO L175 Difference]: Start difference. First operand has 165 places, 234 transitions, 3064 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:56:05,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 277 transitions, 3984 flow [2024-06-03 19:56:06,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 277 transitions, 3868 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:06,116 INFO L231 Difference]: Finished difference. Result has 169 places, 250 transitions, 3323 flow [2024-06-03 19:56:06,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2953, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=169, PETRI_TRANSITIONS=250} [2024-06-03 19:56:06,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-03 19:56:06,117 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 250 transitions, 3323 flow [2024-06-03 19:56:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:06,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:06,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:06,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:56:06,118 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:06,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash -241964048, now seen corresponding path program 4 times [2024-06-03 19:56:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:06,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353572394] [2024-06-03 19:56:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:06,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:06,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353572394] [2024-06-03 19:56:06,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353572394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:06,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448020377] [2024-06-03 19:56:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:06,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:06,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:06,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:06,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:06,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 250 transitions, 3323 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) [2024-06-03 19:56:06,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:06,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:06,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:07,890 INFO L124 PetriNetUnfolderBase]: 3438/5077 cut-off events. [2024-06-03 19:56:07,890 INFO L125 PetriNetUnfolderBase]: For 194546/194546 co-relation queries the response was YES. [2024-06-03 19:56:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39784 conditions, 5077 events. 3438/5077 cut-off events. For 194546/194546 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25505 event pairs, 787 based on Foata normal form. 14/5090 useless extension candidates. Maximal degree in co-relation 39695. Up to 4905 conditions per place. [2024-06-03 19:56:07,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 27 changer transitions 0/284 dead transitions. [2024-06-03 19:56:07,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 284 transitions, 4149 flow [2024-06-03 19:56:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:56:07,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:56:07,940 INFO L175 Difference]: Start difference. First operand has 169 places, 250 transitions, 3323 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:56:07,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 284 transitions, 4149 flow [2024-06-03 19:56:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 284 transitions, 4014 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-03 19:56:08,165 INFO L231 Difference]: Finished difference. Result has 175 places, 254 transitions, 3357 flow [2024-06-03 19:56:08,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3357, PETRI_PLACES=175, PETRI_TRANSITIONS=254} [2024-06-03 19:56:08,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-03 19:56:08,165 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 254 transitions, 3357 flow [2024-06-03 19:56:08,165 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) [2024-06-03 19:56:08,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:08,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:56:08,166 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:08,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 663071500, now seen corresponding path program 2 times [2024-06-03 19:56:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:08,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290381044] [2024-06-03 19:56:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290381044] [2024-06-03 19:56:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290381044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:56:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483172675] [2024-06-03 19:56:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:56:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:56:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:56:08,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:08,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 254 transitions, 3357 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:08,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:08,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:08,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:09,471 INFO L124 PetriNetUnfolderBase]: 3429/5065 cut-off events. [2024-06-03 19:56:09,471 INFO L125 PetriNetUnfolderBase]: For 196810/196810 co-relation queries the response was YES. [2024-06-03 19:56:09,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 5065 events. 3429/5065 cut-off events. For 196810/196810 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25418 event pairs, 825 based on Foata normal form. 3/5067 useless extension candidates. Maximal degree in co-relation 39906. Up to 5040 conditions per place. [2024-06-03 19:56:09,519 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 251 selfloop transitions, 11 changer transitions 0/265 dead transitions. [2024-06-03 19:56:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 265 transitions, 3918 flow [2024-06-03 19:56:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:56:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:56:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 19:56:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 19:56:09,520 INFO L175 Difference]: Start difference. First operand has 175 places, 254 transitions, 3357 flow. Second operand 6 states and 97 transitions. [2024-06-03 19:56:09,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 265 transitions, 3918 flow [2024-06-03 19:56:09,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 265 transitions, 3779 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:09,745 INFO L231 Difference]: Finished difference. Result has 176 places, 254 transitions, 3246 flow [2024-06-03 19:56:09,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3246, PETRI_PLACES=176, PETRI_TRANSITIONS=254} [2024-06-03 19:56:09,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 19:56:09,745 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 254 transitions, 3246 flow [2024-06-03 19:56:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:09,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:09,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:56:09,746 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash 325632748, now seen corresponding path program 1 times [2024-06-03 19:56:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620649875] [2024-06-03 19:56:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620649875] [2024-06-03 19:56:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620649875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:10,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:56:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499176207] [2024-06-03 19:56:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:56:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:56:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:56:10,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:10,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 254 transitions, 3246 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:10,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:10,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:10,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:11,139 INFO L124 PetriNetUnfolderBase]: 3426/5062 cut-off events. [2024-06-03 19:56:11,139 INFO L125 PetriNetUnfolderBase]: For 200133/200133 co-relation queries the response was YES. [2024-06-03 19:56:11,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39471 conditions, 5062 events. 3426/5062 cut-off events. For 200133/200133 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25488 event pairs, 817 based on Foata normal form. 9/5070 useless extension candidates. Maximal degree in co-relation 39378. Up to 4920 conditions per place. [2024-06-03 19:56:11,189 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 35 changer transitions 0/280 dead transitions. [2024-06-03 19:56:11,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 280 transitions, 4049 flow [2024-06-03 19:56:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:56:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:56:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 19:56:11,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 19:56:11,190 INFO L175 Difference]: Start difference. First operand has 176 places, 254 transitions, 3246 flow. Second operand 6 states and 111 transitions. [2024-06-03 19:56:11,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 280 transitions, 4049 flow [2024-06-03 19:56:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 280 transitions, 4015 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:11,382 INFO L231 Difference]: Finished difference. Result has 177 places, 260 transitions, 3401 flow [2024-06-03 19:56:11,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3401, PETRI_PLACES=177, PETRI_TRANSITIONS=260} [2024-06-03 19:56:11,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 19:56:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 260 transitions, 3401 flow [2024-06-03 19:56:11,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:11,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:11,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:56:11,383 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:11,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 663279262, now seen corresponding path program 2 times [2024-06-03 19:56:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799785143] [2024-06-03 19:56:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:11,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799785143] [2024-06-03 19:56:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799785143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:11,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:56:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552632817] [2024-06-03 19:56:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:56:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:56:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:56:11,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:11,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 260 transitions, 3401 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:11,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:11,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:11,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:12,746 INFO L124 PetriNetUnfolderBase]: 3312/4882 cut-off events. [2024-06-03 19:56:12,746 INFO L125 PetriNetUnfolderBase]: For 202077/202079 co-relation queries the response was YES. [2024-06-03 19:56:12,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38569 conditions, 4882 events. 3312/4882 cut-off events. For 202077/202079 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24269 event pairs, 811 based on Foata normal form. 3/4884 useless extension candidates. Maximal degree in co-relation 38476. Up to 4753 conditions per place. [2024-06-03 19:56:12,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 37 changer transitions 0/277 dead transitions. [2024-06-03 19:56:12,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 277 transitions, 4023 flow [2024-06-03 19:56:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:56:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:56:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:56:12,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:56:12,794 INFO L175 Difference]: Start difference. First operand has 177 places, 260 transitions, 3401 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:56:12,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 277 transitions, 4023 flow [2024-06-03 19:56:13,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 277 transitions, 3944 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:56:13,003 INFO L231 Difference]: Finished difference. Result has 180 places, 260 transitions, 3407 flow [2024-06-03 19:56:13,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3407, PETRI_PLACES=180, PETRI_TRANSITIONS=260} [2024-06-03 19:56:13,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-03 19:56:13,004 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 260 transitions, 3407 flow [2024-06-03 19:56:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:13,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:13,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:13,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:56:13,004 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:13,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 204888280, now seen corresponding path program 1 times [2024-06-03 19:56:13,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:13,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684742949] [2024-06-03 19:56:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:13,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:13,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:13,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684742949] [2024-06-03 19:56:13,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684742949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:13,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:13,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:13,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449217189] [2024-06-03 19:56:13,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:13,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:13,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:13,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:13,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 260 transitions, 3407 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:13,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:13,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:14,845 INFO L124 PetriNetUnfolderBase]: 3561/5285 cut-off events. [2024-06-03 19:56:14,845 INFO L125 PetriNetUnfolderBase]: For 245803/245805 co-relation queries the response was YES. [2024-06-03 19:56:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42481 conditions, 5285 events. 3561/5285 cut-off events. For 245803/245805 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27110 event pairs, 518 based on Foata normal form. 24/5308 useless extension candidates. Maximal degree in co-relation 42387. Up to 3760 conditions per place. [2024-06-03 19:56:14,901 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 261 selfloop transitions, 82 changer transitions 0/346 dead transitions. [2024-06-03 19:56:14,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 346 transitions, 5199 flow [2024-06-03 19:56:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:56:14,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-03 19:56:14,903 INFO L175 Difference]: Start difference. First operand has 180 places, 260 transitions, 3407 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:56:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 346 transitions, 5199 flow [2024-06-03 19:56:15,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 346 transitions, 5070 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:15,199 INFO L231 Difference]: Finished difference. Result has 186 places, 280 transitions, 3901 flow [2024-06-03 19:56:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3901, PETRI_PLACES=186, PETRI_TRANSITIONS=280} [2024-06-03 19:56:15,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 19:56:15,200 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 280 transitions, 3901 flow [2024-06-03 19:56:15,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:56:15,200 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash 206765950, now seen corresponding path program 2 times [2024-06-03 19:56:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146162843] [2024-06-03 19:56:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146162843] [2024-06-03 19:56:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146162843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:15,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:15,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250764656] [2024-06-03 19:56:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:16,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 280 transitions, 3901 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:17,431 INFO L124 PetriNetUnfolderBase]: 4125/6199 cut-off events. [2024-06-03 19:56:17,431 INFO L125 PetriNetUnfolderBase]: For 342751/342753 co-relation queries the response was YES. [2024-06-03 19:56:17,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50340 conditions, 6199 events. 4125/6199 cut-off events. For 342751/342753 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33474 event pairs, 832 based on Foata normal form. 98/6296 useless extension candidates. Maximal degree in co-relation 50242. Up to 3597 conditions per place. [2024-06-03 19:56:17,488 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 222 selfloop transitions, 143 changer transitions 0/368 dead transitions. [2024-06-03 19:56:17,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 368 transitions, 5569 flow [2024-06-03 19:56:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:56:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:56:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-03 19:56:17,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-03 19:56:17,489 INFO L175 Difference]: Start difference. First operand has 186 places, 280 transitions, 3901 flow. Second operand 11 states and 234 transitions. [2024-06-03 19:56:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 368 transitions, 5569 flow [2024-06-03 19:56:17,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 368 transitions, 5399 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-03 19:56:17,860 INFO L231 Difference]: Finished difference. Result has 198 places, 296 transitions, 4441 flow [2024-06-03 19:56:17,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4441, PETRI_PLACES=198, PETRI_TRANSITIONS=296} [2024-06-03 19:56:17,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-03 19:56:17,861 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 296 transitions, 4441 flow [2024-06-03 19:56:17,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:17,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:17,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:56:17,861 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:17,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash 206762230, now seen corresponding path program 3 times [2024-06-03 19:56:17,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:17,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888848568] [2024-06-03 19:56:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:18,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:18,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888848568] [2024-06-03 19:56:18,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888848568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:18,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:18,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792956901] [2024-06-03 19:56:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:18,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:18,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:18,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 296 transitions, 4441 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:18,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:18,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:18,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:20,393 INFO L124 PetriNetUnfolderBase]: 5055/7673 cut-off events. [2024-06-03 19:56:20,393 INFO L125 PetriNetUnfolderBase]: For 454121/454123 co-relation queries the response was YES. [2024-06-03 19:56:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64897 conditions, 7673 events. 5055/7673 cut-off events. For 454121/454123 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43900 event pairs, 1051 based on Foata normal form. 82/7754 useless extension candidates. Maximal degree in co-relation 64794. Up to 3586 conditions per place. [2024-06-03 19:56:20,481 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 238 selfloop transitions, 139 changer transitions 0/380 dead transitions. [2024-06-03 19:56:20,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 380 transitions, 6213 flow [2024-06-03 19:56:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:56:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:56:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-03 19:56:20,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 19:56:20,482 INFO L175 Difference]: Start difference. First operand has 198 places, 296 transitions, 4441 flow. Second operand 10 states and 220 transitions. [2024-06-03 19:56:20,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 380 transitions, 6213 flow [2024-06-03 19:56:21,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 380 transitions, 5956 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-03 19:56:21,251 INFO L231 Difference]: Finished difference. Result has 204 places, 303 transitions, 4696 flow [2024-06-03 19:56:21,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4696, PETRI_PLACES=204, PETRI_TRANSITIONS=303} [2024-06-03 19:56:21,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-03 19:56:21,251 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 303 transitions, 4696 flow [2024-06-03 19:56:21,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:21,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:21,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:21,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:56:21,252 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:21,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 57473710, now seen corresponding path program 1 times [2024-06-03 19:56:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185296310] [2024-06-03 19:56:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:21,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185296310] [2024-06-03 19:56:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185296310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:21,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:21,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827715416] [2024-06-03 19:56:21,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:21,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:21,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:21,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 303 transitions, 4696 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:21,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:21,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:21,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:23,195 INFO L124 PetriNetUnfolderBase]: 5115/7757 cut-off events. [2024-06-03 19:56:23,195 INFO L125 PetriNetUnfolderBase]: For 424510/424512 co-relation queries the response was YES. [2024-06-03 19:56:23,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66637 conditions, 7757 events. 5115/7757 cut-off events. For 424510/424512 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44519 event pairs, 1437 based on Foata normal form. 14/7770 useless extension candidates. Maximal degree in co-relation 66531. Up to 6842 conditions per place. [2024-06-03 19:56:23,279 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 258 selfloop transitions, 83 changer transitions 0/344 dead transitions. [2024-06-03 19:56:23,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 344 transitions, 5844 flow [2024-06-03 19:56:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 19:56:23,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-03 19:56:23,281 INFO L175 Difference]: Start difference. First operand has 204 places, 303 transitions, 4696 flow. Second operand 7 states and 142 transitions. [2024-06-03 19:56:23,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 344 transitions, 5844 flow [2024-06-03 19:56:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 344 transitions, 5562 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:24,102 INFO L231 Difference]: Finished difference. Result has 205 places, 311 transitions, 4772 flow [2024-06-03 19:56:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4772, PETRI_PLACES=205, PETRI_TRANSITIONS=311} [2024-06-03 19:56:24,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 19:56:24,103 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 311 transitions, 4772 flow [2024-06-03 19:56:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:24,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:24,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:56:24,103 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)] === [2024-06-03 19:56:24,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1336915348, now seen corresponding path program 4 times [2024-06-03 19:56:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621813871] [2024-06-03 19:56:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:24,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:24,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621813871] [2024-06-03 19:56:24,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621813871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:24,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524265618] [2024-06-03 19:56:24,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:24,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:24,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:24,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:24,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 311 transitions, 4772 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:24,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:24,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:24,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:26,576 INFO L124 PetriNetUnfolderBase]: 5211/7917 cut-off events. [2024-06-03 19:56:26,576 INFO L125 PetriNetUnfolderBase]: For 439863/439865 co-relation queries the response was YES. [2024-06-03 19:56:26,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67116 conditions, 7917 events. 5211/7917 cut-off events. For 439863/439865 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 45684 event pairs, 1411 based on Foata normal form. 24/7940 useless extension candidates. Maximal degree in co-relation 67008. Up to 6643 conditions per place. [2024-06-03 19:56:26,653 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 284 selfloop transitions, 96 changer transitions 0/383 dead transitions. [2024-06-03 19:56:26,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 383 transitions, 6541 flow [2024-06-03 19:56:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 19:56:26,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 19:56:26,654 INFO L175 Difference]: Start difference. First operand has 205 places, 311 transitions, 4772 flow. Second operand 9 states and 187 transitions. [2024-06-03 19:56:26,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 383 transitions, 6541 flow [2024-06-03 19:56:27,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 383 transitions, 6367 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:27,289 INFO L231 Difference]: Finished difference. Result has 214 places, 326 transitions, 5247 flow [2024-06-03 19:56:27,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5247, PETRI_PLACES=214, PETRI_TRANSITIONS=326} [2024-06-03 19:56:27,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-03 19:56:27,291 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 326 transitions, 5247 flow [2024-06-03 19:56:27,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:27,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:27,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:56:27,291 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)] === [2024-06-03 19:56:27,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1336919068, now seen corresponding path program 5 times [2024-06-03 19:56:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:27,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042325399] [2024-06-03 19:56:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042325399] [2024-06-03 19:56:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042325399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433167164] [2024-06-03 19:56:28,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:28,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 326 transitions, 5247 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:28,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:28,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:28,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:29,714 INFO L124 PetriNetUnfolderBase]: 5371/8173 cut-off events. [2024-06-03 19:56:29,714 INFO L125 PetriNetUnfolderBase]: For 476965/476967 co-relation queries the response was YES. [2024-06-03 19:56:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70608 conditions, 8173 events. 5371/8173 cut-off events. For 476965/476967 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 47772 event pairs, 1592 based on Foata normal form. 30/8202 useless extension candidates. Maximal degree in co-relation 70495. Up to 7265 conditions per place. [2024-06-03 19:56:29,812 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 283 selfloop transitions, 97 changer transitions 0/383 dead transitions. [2024-06-03 19:56:29,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 383 transitions, 6611 flow [2024-06-03 19:56:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:56:29,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-03 19:56:29,813 INFO L175 Difference]: Start difference. First operand has 214 places, 326 transitions, 5247 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:56:29,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 383 transitions, 6611 flow [2024-06-03 19:56:30,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 383 transitions, 6407 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:30,595 INFO L231 Difference]: Finished difference. Result has 221 places, 333 transitions, 5443 flow [2024-06-03 19:56:30,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5443, PETRI_PLACES=221, PETRI_TRANSITIONS=333} [2024-06-03 19:56:30,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 19:56:30,596 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 333 transitions, 5443 flow [2024-06-03 19:56:30,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:30,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:30,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:56:30,596 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)] === [2024-06-03 19:56:30,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1342633360, now seen corresponding path program 1 times [2024-06-03 19:56:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677147584] [2024-06-03 19:56:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:31,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677147584] [2024-06-03 19:56:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677147584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:31,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:31,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54425487] [2024-06-03 19:56:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:31,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:31,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:31,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 333 transitions, 5443 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:31,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:31,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:31,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:33,337 INFO L124 PetriNetUnfolderBase]: 5519/8397 cut-off events. [2024-06-03 19:56:33,337 INFO L125 PetriNetUnfolderBase]: For 497560/497562 co-relation queries the response was YES. [2024-06-03 19:56:33,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72461 conditions, 8397 events. 5519/8397 cut-off events. For 497560/497562 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49219 event pairs, 1338 based on Foata normal form. 24/8420 useless extension candidates. Maximal degree in co-relation 72345. Up to 7079 conditions per place. [2024-06-03 19:56:33,422 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 273 selfloop transitions, 109 changer transitions 0/385 dead transitions. [2024-06-03 19:56:33,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 385 transitions, 6769 flow [2024-06-03 19:56:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:56:33,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:56:33,423 INFO L175 Difference]: Start difference. First operand has 221 places, 333 transitions, 5443 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:56:33,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 385 transitions, 6769 flow [2024-06-03 19:56:34,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 385 transitions, 6607 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:56:34,176 INFO L231 Difference]: Finished difference. Result has 227 places, 342 transitions, 5788 flow [2024-06-03 19:56:34,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5281, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5788, PETRI_PLACES=227, PETRI_TRANSITIONS=342} [2024-06-03 19:56:34,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-03 19:56:34,176 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 342 transitions, 5788 flow [2024-06-03 19:56:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:34,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:34,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:56:34,181 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:34,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -427333164, now seen corresponding path program 2 times [2024-06-03 19:56:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:34,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718952131] [2024-06-03 19:56:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:34,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:34,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718952131] [2024-06-03 19:56:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718952131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:34,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255449186] [2024-06-03 19:56:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:34,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:34,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:35,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:35,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 342 transitions, 5788 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:35,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:35,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:35,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:36,830 INFO L124 PetriNetUnfolderBase]: 5603/8533 cut-off events. [2024-06-03 19:56:36,830 INFO L125 PetriNetUnfolderBase]: For 532377/532379 co-relation queries the response was YES. [2024-06-03 19:56:36,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74609 conditions, 8533 events. 5603/8533 cut-off events. For 532377/532379 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 50342 event pairs, 1339 based on Foata normal form. 24/8556 useless extension candidates. Maximal degree in co-relation 74490. Up to 7219 conditions per place. [2024-06-03 19:56:36,936 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 268 selfloop transitions, 121 changer transitions 0/392 dead transitions. [2024-06-03 19:56:36,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 392 transitions, 7068 flow [2024-06-03 19:56:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:56:36,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 19:56:36,937 INFO L175 Difference]: Start difference. First operand has 227 places, 342 transitions, 5788 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:56:36,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 392 transitions, 7068 flow [2024-06-03 19:56:37,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 392 transitions, 6892 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 19:56:37,973 INFO L231 Difference]: Finished difference. Result has 234 places, 346 transitions, 6064 flow [2024-06-03 19:56:37,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6064, PETRI_PLACES=234, PETRI_TRANSITIONS=346} [2024-06-03 19:56:37,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 19:56:37,974 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 346 transitions, 6064 flow [2024-06-03 19:56:37,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:37,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:37,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:37,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:56:37,974 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:37,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash -427339116, now seen corresponding path program 6 times [2024-06-03 19:56:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:37,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433587387] [2024-06-03 19:56:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433587387] [2024-06-03 19:56:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433587387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:38,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828690893] [2024-06-03 19:56:38,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:38,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:38,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 346 transitions, 6064 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:38,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:40,870 INFO L124 PetriNetUnfolderBase]: 6071/9309 cut-off events. [2024-06-03 19:56:40,870 INFO L125 PetriNetUnfolderBase]: For 666536/666538 co-relation queries the response was YES. [2024-06-03 19:56:40,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80830 conditions, 9309 events. 6071/9309 cut-off events. For 666536/666538 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 56138 event pairs, 1649 based on Foata normal form. 94/9402 useless extension candidates. Maximal degree in co-relation 80708. Up to 7574 conditions per place. [2024-06-03 19:56:40,972 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 301 selfloop transitions, 99 changer transitions 1/404 dead transitions. [2024-06-03 19:56:40,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 404 transitions, 7412 flow [2024-06-03 19:56:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 19:56:40,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 19:56:40,973 INFO L175 Difference]: Start difference. First operand has 234 places, 346 transitions, 6064 flow. Second operand 9 states and 187 transitions. [2024-06-03 19:56:40,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 404 transitions, 7412 flow [2024-06-03 19:56:41,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 404 transitions, 7152 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:41,882 INFO L231 Difference]: Finished difference. Result has 238 places, 351 transitions, 6162 flow [2024-06-03 19:56:41,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6162, PETRI_PLACES=238, PETRI_TRANSITIONS=351} [2024-06-03 19:56:41,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-03 19:56:41,883 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 351 transitions, 6162 flow [2024-06-03 19:56:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:41,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:41,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:41,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:56:41,883 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:41,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash -421976736, now seen corresponding path program 7 times [2024-06-03 19:56:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:41,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747680236] [2024-06-03 19:56:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:41,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:42,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:42,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747680236] [2024-06-03 19:56:42,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747680236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:42,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683597708] [2024-06-03 19:56:42,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:42,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:42,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:42,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:42,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 351 transitions, 6162 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:42,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:45,093 INFO L124 PetriNetUnfolderBase]: 6535/10081 cut-off events. [2024-06-03 19:56:45,093 INFO L125 PetriNetUnfolderBase]: For 720452/720454 co-relation queries the response was YES. [2024-06-03 19:56:45,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85881 conditions, 10081 events. 6535/10081 cut-off events. For 720452/720454 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 62393 event pairs, 1715 based on Foata normal form. 98/10178 useless extension candidates. Maximal degree in co-relation 85759. Up to 8350 conditions per place. [2024-06-03 19:56:45,225 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 312 selfloop transitions, 90 changer transitions 0/405 dead transitions. [2024-06-03 19:56:45,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 405 transitions, 7425 flow [2024-06-03 19:56:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:56:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:56:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:56:45,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 19:56:45,228 INFO L175 Difference]: Start difference. First operand has 238 places, 351 transitions, 6162 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:56:45,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 405 transitions, 7425 flow [2024-06-03 19:56:46,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 405 transitions, 7160 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:56:46,469 INFO L231 Difference]: Finished difference. Result has 241 places, 357 transitions, 6275 flow [2024-06-03 19:56:46,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=241, PETRI_TRANSITIONS=357} [2024-06-03 19:56:46,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-03 19:56:46,470 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 357 transitions, 6275 flow [2024-06-03 19:56:46,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:46,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:46,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:56:46,470 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:46,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -421761534, now seen corresponding path program 3 times [2024-06-03 19:56:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:46,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476895458] [2024-06-03 19:56:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:47,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476895458] [2024-06-03 19:56:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476895458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:47,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898892338] [2024-06-03 19:56:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:47,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:47,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:47,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:47,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 357 transitions, 6275 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:47,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:47,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:47,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:49,365 INFO L124 PetriNetUnfolderBase]: 6623/10221 cut-off events. [2024-06-03 19:56:49,365 INFO L125 PetriNetUnfolderBase]: For 665376/665378 co-relation queries the response was YES. [2024-06-03 19:56:49,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86848 conditions, 10221 events. 6623/10221 cut-off events. For 665376/665378 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 63524 event pairs, 1579 based on Foata normal form. 20/10240 useless extension candidates. Maximal degree in co-relation 86725. Up to 8039 conditions per place. [2024-06-03 19:56:49,487 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 293 selfloop transitions, 113 changer transitions 0/409 dead transitions. [2024-06-03 19:56:49,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 409 transitions, 7592 flow [2024-06-03 19:56:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 19:56:49,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-03 19:56:49,488 INFO L175 Difference]: Start difference. First operand has 241 places, 357 transitions, 6275 flow. Second operand 8 states and 165 transitions. [2024-06-03 19:56:49,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 409 transitions, 7592 flow [2024-06-03 19:56:50,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 409 transitions, 7318 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:50,611 INFO L231 Difference]: Finished difference. Result has 243 places, 359 transitions, 6345 flow [2024-06-03 19:56:50,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=243, PETRI_TRANSITIONS=359} [2024-06-03 19:56:50,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-03 19:56:50,612 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 359 transitions, 6345 flow [2024-06-03 19:56:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:50,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:50,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:50,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:56:50,612 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:50,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 57772240, now seen corresponding path program 2 times [2024-06-03 19:56:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:50,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990297576] [2024-06-03 19:56:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:51,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990297576] [2024-06-03 19:56:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990297576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:51,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:51,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:56:51,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905007509] [2024-06-03 19:56:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:56:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:56:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:56:51,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:51,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 359 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:51,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:51,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:51,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:53,213 INFO L124 PetriNetUnfolderBase]: 6821/10497 cut-off events. [2024-06-03 19:56:53,214 INFO L125 PetriNetUnfolderBase]: For 694651/694653 co-relation queries the response was YES. [2024-06-03 19:56:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90451 conditions, 10497 events. 6821/10497 cut-off events. For 694651/694653 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 65176 event pairs, 1832 based on Foata normal form. 14/10510 useless extension candidates. Maximal degree in co-relation 90327. Up to 9396 conditions per place. [2024-06-03 19:56:53,340 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 309 selfloop transitions, 97 changer transitions 0/409 dead transitions. [2024-06-03 19:56:53,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 409 transitions, 8089 flow [2024-06-03 19:56:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:56:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:56:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:56:53,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-03 19:56:53,341 INFO L175 Difference]: Start difference. First operand has 243 places, 359 transitions, 6345 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:56:53,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 409 transitions, 8089 flow [2024-06-03 19:56:54,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 409 transitions, 7774 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:56:54,610 INFO L231 Difference]: Finished difference. Result has 245 places, 382 transitions, 6904 flow [2024-06-03 19:56:54,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6904, PETRI_PLACES=245, PETRI_TRANSITIONS=382} [2024-06-03 19:56:54,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-03 19:56:54,610 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 382 transitions, 6904 flow [2024-06-03 19:56:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:54,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:54,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:56:54,610 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:54,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:54,611 INFO L85 PathProgramCache]: Analyzing trace with hash 823345526, now seen corresponding path program 4 times [2024-06-03 19:56:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:54,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897414251] [2024-06-03 19:56:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:54,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:55,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897414251] [2024-06-03 19:56:55,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897414251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:55,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:55,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:55,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114925130] [2024-06-03 19:56:55,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:55,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:55,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:55,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:55,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 382 transitions, 6904 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:55,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:55,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:55,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:56:57,641 INFO L124 PetriNetUnfolderBase]: 6890/10603 cut-off events. [2024-06-03 19:56:57,642 INFO L125 PetriNetUnfolderBase]: For 723342/723348 co-relation queries the response was YES. [2024-06-03 19:56:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91237 conditions, 10603 events. 6890/10603 cut-off events. For 723342/723348 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 66076 event pairs, 2394 based on Foata normal form. 24/10626 useless extension candidates. Maximal degree in co-relation 91111. Up to 10379 conditions per place. [2024-06-03 19:56:57,794 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 384 selfloop transitions, 31 changer transitions 0/418 dead transitions. [2024-06-03 19:56:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 418 transitions, 7984 flow [2024-06-03 19:56:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:56:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:56:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:56:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-03 19:56:57,795 INFO L175 Difference]: Start difference. First operand has 245 places, 382 transitions, 6904 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:56:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 418 transitions, 7984 flow [2024-06-03 19:56:59,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 418 transitions, 7829 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 19:56:59,126 INFO L231 Difference]: Finished difference. Result has 250 places, 384 transitions, 6914 flow [2024-06-03 19:56:59,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6914, PETRI_PLACES=250, PETRI_TRANSITIONS=384} [2024-06-03 19:56:59,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-03 19:56:59,127 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 384 transitions, 6914 flow [2024-06-03 19:56:59,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:59,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:56:59,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:56:59,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:56:59,128 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:56:59,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:56:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1089050246, now seen corresponding path program 5 times [2024-06-03 19:56:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:56:59,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537679998] [2024-06-03 19:56:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:56:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:56:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:56:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:56:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:56:59,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537679998] [2024-06-03 19:56:59,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537679998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:56:59,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:56:59,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:56:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575586340] [2024-06-03 19:56:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:56:59,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:56:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:56:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:56:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:56:59,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:56:59,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 384 transitions, 6914 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:56:59,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:56:59,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:56:59,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:02,040 INFO L124 PetriNetUnfolderBase]: 6943/10686 cut-off events. [2024-06-03 19:57:02,040 INFO L125 PetriNetUnfolderBase]: For 743796/743802 co-relation queries the response was YES. [2024-06-03 19:57:02,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91957 conditions, 10686 events. 6943/10686 cut-off events. For 743796/743802 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 66662 event pairs, 2397 based on Foata normal form. 20/10705 useless extension candidates. Maximal degree in co-relation 91830. Up to 10454 conditions per place. [2024-06-03 19:57:02,183 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-06-03 19:57:02,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 420 transitions, 8002 flow [2024-06-03 19:57:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:57:02,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-03 19:57:02,185 INFO L175 Difference]: Start difference. First operand has 250 places, 384 transitions, 6914 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:57:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 420 transitions, 8002 flow [2024-06-03 19:57:03,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 420 transitions, 7889 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:03,738 INFO L231 Difference]: Finished difference. Result has 253 places, 386 transitions, 6964 flow [2024-06-03 19:57:03,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6964, PETRI_PLACES=253, PETRI_TRANSITIONS=386} [2024-06-03 19:57:03,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 19:57:03,739 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 386 transitions, 6964 flow [2024-06-03 19:57:03,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:03,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:03,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:57:03,739 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:03,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash -152666826, now seen corresponding path program 6 times [2024-06-03 19:57:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:03,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820289981] [2024-06-03 19:57:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:03,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:04,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:04,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820289981] [2024-06-03 19:57:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820289981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:04,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146441585] [2024-06-03 19:57:04,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:04,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:04,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:04,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 386 transitions, 6964 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:04,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:04,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:06,922 INFO L124 PetriNetUnfolderBase]: 7073/10888 cut-off events. [2024-06-03 19:57:06,923 INFO L125 PetriNetUnfolderBase]: For 780044/780050 co-relation queries the response was YES. [2024-06-03 19:57:07,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93691 conditions, 10888 events. 7073/10888 cut-off events. For 780044/780050 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 68218 event pairs, 2448 based on Foata normal form. 24/10911 useless extension candidates. Maximal degree in co-relation 93563. Up to 10481 conditions per place. [2024-06-03 19:57:07,040 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 393 selfloop transitions, 33 changer transitions 0/429 dead transitions. [2024-06-03 19:57:07,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 429 transitions, 8164 flow [2024-06-03 19:57:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:57:07,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 19:57:07,041 INFO L175 Difference]: Start difference. First operand has 253 places, 386 transitions, 6964 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:57:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 429 transitions, 8164 flow [2024-06-03 19:57:08,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 429 transitions, 8037 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:08,326 INFO L231 Difference]: Finished difference. Result has 256 places, 390 transitions, 7044 flow [2024-06-03 19:57:08,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7044, PETRI_PLACES=256, PETRI_TRANSITIONS=390} [2024-06-03 19:57:08,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-03 19:57:08,327 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 390 transitions, 7044 flow [2024-06-03 19:57:08,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:08,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:08,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:57:08,328 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:08,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash 823137764, now seen corresponding path program 8 times [2024-06-03 19:57:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:08,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70385817] [2024-06-03 19:57:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70385817] [2024-06-03 19:57:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70385817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194703693] [2024-06-03 19:57:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:09,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:09,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 390 transitions, 7044 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:09,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:09,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:09,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:11,664 INFO L124 PetriNetUnfolderBase]: 7408/11433 cut-off events. [2024-06-03 19:57:11,664 INFO L125 PetriNetUnfolderBase]: For 932278/932284 co-relation queries the response was YES. [2024-06-03 19:57:11,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97771 conditions, 11433 events. 7408/11433 cut-off events. For 932278/932284 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 72415 event pairs, 2564 based on Foata normal form. 102/11534 useless extension candidates. Maximal degree in co-relation 97641. Up to 10639 conditions per place. [2024-06-03 19:57:11,819 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 390 selfloop transitions, 33 changer transitions 13/439 dead transitions. [2024-06-03 19:57:11,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 439 transitions, 8285 flow [2024-06-03 19:57:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:57:11,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-03 19:57:11,820 INFO L175 Difference]: Start difference. First operand has 256 places, 390 transitions, 7044 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:57:11,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 439 transitions, 8285 flow [2024-06-03 19:57:13,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 439 transitions, 8166 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:13,164 INFO L231 Difference]: Finished difference. Result has 262 places, 389 transitions, 7028 flow [2024-06-03 19:57:13,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=262, PETRI_TRANSITIONS=389} [2024-06-03 19:57:13,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-03 19:57:13,165 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 389 transitions, 7028 flow [2024-06-03 19:57:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:13,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:13,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:13,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:57:13,165 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:13,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1079846036, now seen corresponding path program 7 times [2024-06-03 19:57:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:13,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855840364] [2024-06-03 19:57:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:13,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:13,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:13,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855840364] [2024-06-03 19:57:13,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855840364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:13,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:13,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894692808] [2024-06-03 19:57:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:13,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:14,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:14,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 389 transitions, 7028 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:14,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:14,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:16,377 INFO L124 PetriNetUnfolderBase]: 7233/11164 cut-off events. [2024-06-03 19:57:16,378 INFO L125 PetriNetUnfolderBase]: For 866280/866286 co-relation queries the response was YES. [2024-06-03 19:57:16,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97342 conditions, 11164 events. 7233/11164 cut-off events. For 866280/866286 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 70480 event pairs, 2520 based on Foata normal form. 22/11185 useless extension candidates. Maximal degree in co-relation 97210. Up to 10861 conditions per place. [2024-06-03 19:57:16,528 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 376 selfloop transitions, 46 changer transitions 0/425 dead transitions. [2024-06-03 19:57:16,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 425 transitions, 8161 flow [2024-06-03 19:57:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:57:16,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-03 19:57:16,529 INFO L175 Difference]: Start difference. First operand has 262 places, 389 transitions, 7028 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:57:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 425 transitions, 8161 flow [2024-06-03 19:57:18,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 425 transitions, 7986 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:18,036 INFO L231 Difference]: Finished difference. Result has 265 places, 391 transitions, 7086 flow [2024-06-03 19:57:18,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7086, PETRI_PLACES=265, PETRI_TRANSITIONS=391} [2024-06-03 19:57:18,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 19:57:18,037 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 391 transitions, 7086 flow [2024-06-03 19:57:18,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:18,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:18,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:18,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:57:18,037 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1079853476, now seen corresponding path program 8 times [2024-06-03 19:57:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631636699] [2024-06-03 19:57:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631636699] [2024-06-03 19:57:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631636699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:18,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:57:18,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634649616] [2024-06-03 19:57:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:18,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:57:18,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:57:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:57:18,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:18,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 391 transitions, 7086 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:18,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:18,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:18,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:21,293 INFO L124 PetriNetUnfolderBase]: 7269/11220 cut-off events. [2024-06-03 19:57:21,293 INFO L125 PetriNetUnfolderBase]: For 860493/860499 co-relation queries the response was YES. [2024-06-03 19:57:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96977 conditions, 11220 events. 7269/11220 cut-off events. For 860493/860499 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70942 event pairs, 2482 based on Foata normal form. 22/11241 useless extension candidates. Maximal degree in co-relation 96844. Up to 10573 conditions per place. [2024-06-03 19:57:21,483 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 379 selfloop transitions, 51 changer transitions 0/433 dead transitions. [2024-06-03 19:57:21,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 433 transitions, 8298 flow [2024-06-03 19:57:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:57:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:57:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:57:21,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-03 19:57:21,485 INFO L175 Difference]: Start difference. First operand has 265 places, 391 transitions, 7086 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:57:21,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 433 transitions, 8298 flow [2024-06-03 19:57:23,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 8142 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:23,477 INFO L231 Difference]: Finished difference. Result has 267 places, 393 transitions, 7154 flow [2024-06-03 19:57:23,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7154, PETRI_PLACES=267, PETRI_TRANSITIONS=393} [2024-06-03 19:57:23,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 19:57:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 393 transitions, 7154 flow [2024-06-03 19:57:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:23,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:23,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:23,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:57:23,478 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:23,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 520015916, now seen corresponding path program 3 times [2024-06-03 19:57:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:23,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593854161] [2024-06-03 19:57:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593854161] [2024-06-03 19:57:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593854161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:23,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:57:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609984111] [2024-06-03 19:57:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:57:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:57:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:57:24,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:24,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 393 transitions, 7154 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:24,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:24,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:24,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:26,595 INFO L124 PetriNetUnfolderBase]: 7251/11200 cut-off events. [2024-06-03 19:57:26,596 INFO L125 PetriNetUnfolderBase]: For 857458/857460 co-relation queries the response was YES. [2024-06-03 19:57:26,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96614 conditions, 11200 events. 7251/11200 cut-off events. For 857458/857460 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70728 event pairs, 2541 based on Foata normal form. 14/11213 useless extension candidates. Maximal degree in co-relation 96480. Up to 10969 conditions per place. [2024-06-03 19:57:26,730 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 363 selfloop transitions, 44 changer transitions 0/410 dead transitions. [2024-06-03 19:57:26,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 410 transitions, 8166 flow [2024-06-03 19:57:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:57:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:57:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:57:26,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 19:57:26,731 INFO L175 Difference]: Start difference. First operand has 267 places, 393 transitions, 7154 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:57:26,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 410 transitions, 8166 flow [2024-06-03 19:57:28,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 410 transitions, 7954 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:28,417 INFO L231 Difference]: Finished difference. Result has 268 places, 393 transitions, 7049 flow [2024-06-03 19:57:28,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7049, PETRI_PLACES=268, PETRI_TRANSITIONS=393} [2024-06-03 19:57:28,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 19:57:28,418 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 393 transitions, 7049 flow [2024-06-03 19:57:28,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:28,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:28,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:57:28,418 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:28,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1307081636, now seen corresponding path program 1 times [2024-06-03 19:57:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:28,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775668036] [2024-06-03 19:57:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:28,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775668036] [2024-06-03 19:57:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775668036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:29,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:57:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617875874] [2024-06-03 19:57:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:57:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:57:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:57:29,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:29,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 393 transitions, 7049 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:29,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:29,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:29,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:31,433 INFO L124 PetriNetUnfolderBase]: 7242/11186 cut-off events. [2024-06-03 19:57:31,433 INFO L125 PetriNetUnfolderBase]: For 828771/828771 co-relation queries the response was YES. [2024-06-03 19:57:31,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95691 conditions, 11186 events. 7242/11186 cut-off events. For 828771/828771 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70586 event pairs, 2542 based on Foata normal form. 3/11188 useless extension candidates. Maximal degree in co-relation 95556. Up to 11155 conditions per place. [2024-06-03 19:57:31,583 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 385 selfloop transitions, 19 changer transitions 0/407 dead transitions. [2024-06-03 19:57:31,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 407 transitions, 7951 flow [2024-06-03 19:57:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:57:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:57:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 19:57:31,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-03 19:57:31,584 INFO L175 Difference]: Start difference. First operand has 268 places, 393 transitions, 7049 flow. Second operand 7 states and 109 transitions. [2024-06-03 19:57:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 407 transitions, 7951 flow [2024-06-03 19:57:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 407 transitions, 7558 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-03 19:57:33,236 INFO L231 Difference]: Finished difference. Result has 266 places, 396 transitions, 6776 flow [2024-06-03 19:57:33,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6776, PETRI_PLACES=266, PETRI_TRANSITIONS=396} [2024-06-03 19:57:33,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 19:57:33,236 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 396 transitions, 6776 flow [2024-06-03 19:57:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:33,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:33,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:33,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:57:33,237 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:33,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash 412466242, now seen corresponding path program 1 times [2024-06-03 19:57:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446000268] [2024-06-03 19:57:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:34,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:34,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446000268] [2024-06-03 19:57:34,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446000268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:34,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:34,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377665868] [2024-06-03 19:57:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:34,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:34,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:34,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 396 transitions, 6776 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:34,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:34,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:34,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:36,484 INFO L124 PetriNetUnfolderBase]: 7237/11179 cut-off events. [2024-06-03 19:57:36,484 INFO L125 PetriNetUnfolderBase]: For 838858/838858 co-relation queries the response was YES. [2024-06-03 19:57:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95218 conditions, 11179 events. 7237/11179 cut-off events. For 838858/838858 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 70368 event pairs, 2545 based on Foata normal form. 2/11180 useless extension candidates. Maximal degree in co-relation 95084. Up to 11151 conditions per place. [2024-06-03 19:57:36,632 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 391 selfloop transitions, 15 changer transitions 0/409 dead transitions. [2024-06-03 19:57:36,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 409 transitions, 7646 flow [2024-06-03 19:57:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:57:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:57:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:57:36,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 19:57:36,633 INFO L175 Difference]: Start difference. First operand has 266 places, 396 transitions, 6776 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:57:36,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 409 transitions, 7646 flow [2024-06-03 19:57:38,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 409 transitions, 7408 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-03 19:57:38,008 INFO L231 Difference]: Finished difference. Result has 265 places, 398 transitions, 6609 flow [2024-06-03 19:57:38,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6609, PETRI_PLACES=265, PETRI_TRANSITIONS=398} [2024-06-03 19:57:38,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 19:57:38,008 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 398 transitions, 6609 flow [2024-06-03 19:57:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:38,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:38,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:57:38,009 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:38,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1781417353, now seen corresponding path program 1 times [2024-06-03 19:57:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:38,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402942544] [2024-06-03 19:57:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:38,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:38,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402942544] [2024-06-03 19:57:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402942544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785816818] [2024-06-03 19:57:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:38,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:38,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 398 transitions, 6609 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:38,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:38,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:38,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:41,100 INFO L124 PetriNetUnfolderBase]: 7297/11265 cut-off events. [2024-06-03 19:57:41,100 INFO L125 PetriNetUnfolderBase]: For 854626/854628 co-relation queries the response was YES. [2024-06-03 19:57:41,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95366 conditions, 11265 events. 7297/11265 cut-off events. For 854626/854628 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 70939 event pairs, 1930 based on Foata normal form. 14/11278 useless extension candidates. Maximal degree in co-relation 95234. Up to 9791 conditions per place. [2024-06-03 19:57:41,249 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 301 selfloop transitions, 147 changer transitions 0/451 dead transitions. [2024-06-03 19:57:41,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 451 transitions, 8111 flow [2024-06-03 19:57:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:57:41,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 19:57:41,250 INFO L175 Difference]: Start difference. First operand has 265 places, 398 transitions, 6609 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:57:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 451 transitions, 8111 flow [2024-06-03 19:57:43,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 451 transitions, 8056 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:57:43,119 INFO L231 Difference]: Finished difference. Result has 269 places, 408 transitions, 7087 flow [2024-06-03 19:57:43,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7087, PETRI_PLACES=269, PETRI_TRANSITIONS=408} [2024-06-03 19:57:43,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-03 19:57:43,119 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 408 transitions, 7087 flow [2024-06-03 19:57:43,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:43,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:43,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:43,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:57:43,120 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:43,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1785230601, now seen corresponding path program 1 times [2024-06-03 19:57:43,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:43,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684440590] [2024-06-03 19:57:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:43,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684440590] [2024-06-03 19:57:43,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684440590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:43,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:43,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:57:43,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041546916] [2024-06-03 19:57:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:43,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:57:43,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:57:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:57:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:43,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 408 transitions, 7087 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:43,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:43,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:43,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:45,976 INFO L124 PetriNetUnfolderBase]: 7291/11259 cut-off events. [2024-06-03 19:57:45,976 INFO L125 PetriNetUnfolderBase]: For 874676/874678 co-relation queries the response was YES. [2024-06-03 19:57:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96113 conditions, 11259 events. 7291/11259 cut-off events. For 874676/874678 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 70931 event pairs, 2021 based on Foata normal form. 20/11278 useless extension candidates. Maximal degree in co-relation 95980. Up to 10199 conditions per place. [2024-06-03 19:57:46,150 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 347 selfloop transitions, 95 changer transitions 0/445 dead transitions. [2024-06-03 19:57:46,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 445 transitions, 8499 flow [2024-06-03 19:57:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:57:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:57:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:57:46,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-03 19:57:46,151 INFO L175 Difference]: Start difference. First operand has 269 places, 408 transitions, 7087 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:57:46,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 445 transitions, 8499 flow [2024-06-03 19:57:47,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 445 transitions, 8178 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:57:47,787 INFO L231 Difference]: Finished difference. Result has 270 places, 415 transitions, 7127 flow [2024-06-03 19:57:47,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7127, PETRI_PLACES=270, PETRI_TRANSITIONS=415} [2024-06-03 19:57:47,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-03 19:57:47,787 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 415 transitions, 7127 flow [2024-06-03 19:57:47,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:47,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:47,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:57:47,788 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:47,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash -482701077, now seen corresponding path program 2 times [2024-06-03 19:57:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:47,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332748050] [2024-06-03 19:57:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:48,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332748050] [2024-06-03 19:57:48,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332748050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:48,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:57:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40768863] [2024-06-03 19:57:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:57:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:57:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:57:48,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:48,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 415 transitions, 7127 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:48,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:48,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:48,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:50,659 INFO L124 PetriNetUnfolderBase]: 7273/11235 cut-off events. [2024-06-03 19:57:50,659 INFO L125 PetriNetUnfolderBase]: For 857131/857133 co-relation queries the response was YES. [2024-06-03 19:57:50,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95479 conditions, 11235 events. 7273/11235 cut-off events. For 857131/857133 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 70619 event pairs, 2029 based on Foata normal form. 8/11242 useless extension candidates. Maximal degree in co-relation 95345. Up to 10194 conditions per place. [2024-06-03 19:57:50,816 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 340 selfloop transitions, 98 changer transitions 0/441 dead transitions. [2024-06-03 19:57:50,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 441 transitions, 8371 flow [2024-06-03 19:57:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:57:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:57:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:57:50,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-03 19:57:50,817 INFO L175 Difference]: Start difference. First operand has 270 places, 415 transitions, 7127 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:57:50,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 441 transitions, 8371 flow [2024-06-03 19:57:52,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 441 transitions, 8213 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:52,549 INFO L231 Difference]: Finished difference. Result has 273 places, 415 transitions, 7179 flow [2024-06-03 19:57:52,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7179, PETRI_PLACES=273, PETRI_TRANSITIONS=415} [2024-06-03 19:57:52,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-03 19:57:52,550 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 415 transitions, 7179 flow [2024-06-03 19:57:52,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:52,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:52,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:57:52,550 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:52,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:52,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1327806987, now seen corresponding path program 1 times [2024-06-03 19:57:52,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:52,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915362017] [2024-06-03 19:57:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915362017] [2024-06-03 19:57:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915362017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:57:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151019565] [2024-06-03 19:57:53,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:57:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:57:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:57:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 415 transitions, 7179 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:57:56,186 INFO L124 PetriNetUnfolderBase]: 7341/11351 cut-off events. [2024-06-03 19:57:56,186 INFO L125 PetriNetUnfolderBase]: For 909908/909910 co-relation queries the response was YES. [2024-06-03 19:57:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96907 conditions, 11351 events. 7341/11351 cut-off events. For 909908/909910 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 71866 event pairs, 2055 based on Foata normal form. 18/11368 useless extension candidates. Maximal degree in co-relation 96772. Up to 10522 conditions per place. [2024-06-03 19:57:56,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 375 selfloop transitions, 90 changer transitions 0/468 dead transitions. [2024-06-03 19:57:56,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 468 transitions, 8634 flow [2024-06-03 19:57:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:57:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:57:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:57:56,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-03 19:57:56,363 INFO L175 Difference]: Start difference. First operand has 273 places, 415 transitions, 7179 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:57:56,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 468 transitions, 8634 flow [2024-06-03 19:57:58,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 468 transitions, 8477 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:57:58,069 INFO L231 Difference]: Finished difference. Result has 280 places, 428 transitions, 7513 flow [2024-06-03 19:57:58,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7513, PETRI_PLACES=280, PETRI_TRANSITIONS=428} [2024-06-03 19:57:58,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-03 19:57:58,069 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 428 transitions, 7513 flow [2024-06-03 19:57:58,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:58,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:57:58,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:57:58,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:57:58,070 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:57:58,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:57:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash -43207187, now seen corresponding path program 2 times [2024-06-03 19:57:58,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:57:58,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089601448] [2024-06-03 19:57:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:57:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:57:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:57:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:57:58,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:57:58,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089601448] [2024-06-03 19:57:58,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089601448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:57:58,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:57:58,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:57:58,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994461758] [2024-06-03 19:57:58,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:57:58,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:57:58,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:57:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:57:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:57:58,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:57:58,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 428 transitions, 7513 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:57:58,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:57:58,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:57:58,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:01,214 INFO L124 PetriNetUnfolderBase]: 7398/11431 cut-off events. [2024-06-03 19:58:01,214 INFO L125 PetriNetUnfolderBase]: For 922708/922710 co-relation queries the response was YES. [2024-06-03 19:58:01,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99088 conditions, 11431 events. 7398/11431 cut-off events. For 922708/922710 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 72312 event pairs, 2126 based on Foata normal form. 5/11435 useless extension candidates. Maximal degree in co-relation 98950. Up to 10853 conditions per place. [2024-06-03 19:58:01,376 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 372 selfloop transitions, 99 changer transitions 0/474 dead transitions. [2024-06-03 19:58:01,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 474 transitions, 9369 flow [2024-06-03 19:58:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:58:01,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-03 19:58:01,377 INFO L175 Difference]: Start difference. First operand has 280 places, 428 transitions, 7513 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:58:01,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 474 transitions, 9369 flow [2024-06-03 19:58:03,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 474 transitions, 9114 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-06-03 19:58:03,287 INFO L231 Difference]: Finished difference. Result has 286 places, 448 transitions, 7948 flow [2024-06-03 19:58:03,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7948, PETRI_PLACES=286, PETRI_TRANSITIONS=448} [2024-06-03 19:58:03,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 19:58:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 448 transitions, 7948 flow [2024-06-03 19:58:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:03,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:58:03,288 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:03,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash 433513801, now seen corresponding path program 3 times [2024-06-03 19:58:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:03,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663043746] [2024-06-03 19:58:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663043746] [2024-06-03 19:58:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663043746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:03,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:58:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142253665] [2024-06-03 19:58:03,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:03,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:58:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:58:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:58:03,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:03,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 448 transitions, 7948 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:03,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:03,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:06,389 INFO L124 PetriNetUnfolderBase]: 7347/11357 cut-off events. [2024-06-03 19:58:06,389 INFO L125 PetriNetUnfolderBase]: For 925495/925495 co-relation queries the response was YES. [2024-06-03 19:58:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97678 conditions, 11357 events. 7347/11357 cut-off events. For 925495/925495 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 71860 event pairs, 2442 based on Foata normal form. 9/11365 useless extension candidates. Maximal degree in co-relation 97537. Up to 11112 conditions per place. [2024-06-03 19:58:06,564 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 40 changer transitions 1/472 dead transitions. [2024-06-03 19:58:06,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 472 transitions, 9136 flow [2024-06-03 19:58:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:58:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:58:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:58:06,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:58:06,565 INFO L175 Difference]: Start difference. First operand has 286 places, 448 transitions, 7948 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:58:06,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 472 transitions, 9136 flow [2024-06-03 19:58:08,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 472 transitions, 8948 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-03 19:58:08,548 INFO L231 Difference]: Finished difference. Result has 290 places, 447 transitions, 7841 flow [2024-06-03 19:58:08,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7841, PETRI_PLACES=290, PETRI_TRANSITIONS=447} [2024-06-03 19:58:08,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 19:58:08,549 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 447 transitions, 7841 flow [2024-06-03 19:58:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:08,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:08,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:58:08,549 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:08,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1302199031, now seen corresponding path program 4 times [2024-06-03 19:58:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293717804] [2024-06-03 19:58:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293717804] [2024-06-03 19:58:09,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293717804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:09,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:09,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:58:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535524329] [2024-06-03 19:58:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:58:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:58:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:58:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 447 transitions, 7841 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:11,696 INFO L124 PetriNetUnfolderBase]: 7328/11332 cut-off events. [2024-06-03 19:58:11,697 INFO L125 PetriNetUnfolderBase]: For 933606/933606 co-relation queries the response was YES. [2024-06-03 19:58:11,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97012 conditions, 11332 events. 7328/11332 cut-off events. For 933606/933606 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 71665 event pairs, 2454 based on Foata normal form. 9/11340 useless extension candidates. Maximal degree in co-relation 96870. Up to 11253 conditions per place. [2024-06-03 19:58:11,860 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 440 selfloop transitions, 26 changer transitions 0/469 dead transitions. [2024-06-03 19:58:11,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 469 transitions, 8961 flow [2024-06-03 19:58:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:58:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:58:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:58:11,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 19:58:11,861 INFO L175 Difference]: Start difference. First operand has 290 places, 447 transitions, 7841 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:58:11,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 469 transitions, 8961 flow [2024-06-03 19:58:13,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 469 transitions, 8824 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:58:13,763 INFO L231 Difference]: Finished difference. Result has 291 places, 453 transitions, 7903 flow [2024-06-03 19:58:13,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7709, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7903, PETRI_PLACES=291, PETRI_TRANSITIONS=453} [2024-06-03 19:58:13,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-03 19:58:13,764 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 453 transitions, 7903 flow [2024-06-03 19:58:13,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:13,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:13,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:13,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:58:13,764 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:13,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1351951421, now seen corresponding path program 2 times [2024-06-03 19:58:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:13,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092602275] [2024-06-03 19:58:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092602275] [2024-06-03 19:58:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092602275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:14,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:58:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577174188] [2024-06-03 19:58:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:58:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:58:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:58:14,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:14,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 453 transitions, 7903 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:14,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:14,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:14,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:17,377 INFO L124 PetriNetUnfolderBase]: 7389/11436 cut-off events. [2024-06-03 19:58:17,377 INFO L125 PetriNetUnfolderBase]: For 978484/978490 co-relation queries the response was YES. [2024-06-03 19:58:17,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98180 conditions, 11436 events. 7389/11436 cut-off events. For 978484/978490 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 72696 event pairs, 2410 based on Foata normal form. 24/11459 useless extension candidates. Maximal degree in co-relation 98037. Up to 11026 conditions per place. [2024-06-03 19:58:17,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 441 selfloop transitions, 53 changer transitions 0/497 dead transitions. [2024-06-03 19:58:17,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 497 transitions, 9249 flow [2024-06-03 19:58:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:58:17,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 19:58:17,547 INFO L175 Difference]: Start difference. First operand has 291 places, 453 transitions, 7903 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:58:17,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 497 transitions, 9249 flow [2024-06-03 19:58:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 497 transitions, 9196 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:58:19,568 INFO L231 Difference]: Finished difference. Result has 299 places, 464 transitions, 8265 flow [2024-06-03 19:58:19,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8265, PETRI_PLACES=299, PETRI_TRANSITIONS=464} [2024-06-03 19:58:19,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 19:58:19,569 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 464 transitions, 8265 flow [2024-06-03 19:58:19,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:19,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:19,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:19,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:58:19,570 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:19,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash -599179569, now seen corresponding path program 3 times [2024-06-03 19:58:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063548356] [2024-06-03 19:58:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063548356] [2024-06-03 19:58:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063548356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:20,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:58:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687986106] [2024-06-03 19:58:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:58:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:58:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:58:20,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:20,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 464 transitions, 8265 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:20,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:20,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:20,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:23,311 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-03 19:58:23,312 INFO L125 PetriNetUnfolderBase]: For 1073846/1073852 co-relation queries the response was YES. [2024-06-03 19:58:23,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100471 conditions, 11655 events. 7518/11655 cut-off events. For 1073846/1073852 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 74373 event pairs, 2390 based on Foata normal form. 48/11702 useless extension candidates. Maximal degree in co-relation 100325. Up to 11198 conditions per place. [2024-06-03 19:58:23,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 464 selfloop transitions, 32 changer transitions 11/510 dead transitions. [2024-06-03 19:58:23,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 510 transitions, 9623 flow [2024-06-03 19:58:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:58:23,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-03 19:58:23,489 INFO L175 Difference]: Start difference. First operand has 299 places, 464 transitions, 8265 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:58:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 510 transitions, 9623 flow [2024-06-03 19:58:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 510 transitions, 9321 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-03 19:58:25,928 INFO L231 Difference]: Finished difference. Result has 304 places, 466 transitions, 8154 flow [2024-06-03 19:58:25,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8154, PETRI_PLACES=304, PETRI_TRANSITIONS=466} [2024-06-03 19:58:25,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 19:58:25,929 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 466 transitions, 8154 flow [2024-06-03 19:58:25,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:25,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:25,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:58:25,929 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:25,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:25,930 INFO L85 PathProgramCache]: Analyzing trace with hash -884516775, now seen corresponding path program 1 times [2024-06-03 19:58:25,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:25,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858849416] [2024-06-03 19:58:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:27,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858849416] [2024-06-03 19:58:27,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858849416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:27,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:27,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876406714] [2024-06-03 19:58:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:27,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:27,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:27,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 466 transitions, 8154 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:27,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:27,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:27,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:29,712 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-03 19:58:29,713 INFO L125 PetriNetUnfolderBase]: For 1015724/1015730 co-relation queries the response was YES. [2024-06-03 19:58:29,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98716 conditions, 11655 events. 7518/11655 cut-off events. For 1015724/1015730 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 74364 event pairs, 2508 based on Foata normal form. 30/11684 useless extension candidates. Maximal degree in co-relation 98568. Up to 11181 conditions per place. [2024-06-03 19:58:29,879 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 451 selfloop transitions, 50 changer transitions 0/504 dead transitions. [2024-06-03 19:58:29,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 504 transitions, 9415 flow [2024-06-03 19:58:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:58:29,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-03 19:58:29,880 INFO L175 Difference]: Start difference. First operand has 304 places, 466 transitions, 8154 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:58:29,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 504 transitions, 9415 flow [2024-06-03 19:58:32,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 504 transitions, 9252 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:32,530 INFO L231 Difference]: Finished difference. Result has 306 places, 469 transitions, 8232 flow [2024-06-03 19:58:32,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8232, PETRI_PLACES=306, PETRI_TRANSITIONS=469} [2024-06-03 19:58:32,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-03 19:58:32,531 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 469 transitions, 8232 flow [2024-06-03 19:58:32,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:32,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:32,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:32,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:58:32,531 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:32,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -884510079, now seen corresponding path program 4 times [2024-06-03 19:58:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:32,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634850919] [2024-06-03 19:58:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634850919] [2024-06-03 19:58:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634850919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531388368] [2024-06-03 19:58:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:33,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:33,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 469 transitions, 8232 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:33,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:33,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:33,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:36,283 INFO L124 PetriNetUnfolderBase]: 7518/11655 cut-off events. [2024-06-03 19:58:36,283 INFO L125 PetriNetUnfolderBase]: For 1000285/1000291 co-relation queries the response was YES. [2024-06-03 19:58:36,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97937 conditions, 11655 events. 7518/11655 cut-off events. For 1000285/1000291 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 74315 event pairs, 2468 based on Foata normal form. 24/11678 useless extension candidates. Maximal degree in co-relation 97788. Up to 11276 conditions per place. [2024-06-03 19:58:36,447 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 452 selfloop transitions, 48 changer transitions 0/503 dead transitions. [2024-06-03 19:58:36,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 503 transitions, 9275 flow [2024-06-03 19:58:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:58:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:58:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:58:36,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-03 19:58:36,449 INFO L175 Difference]: Start difference. First operand has 306 places, 469 transitions, 8232 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:58:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 503 transitions, 9275 flow [2024-06-03 19:58:38,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 503 transitions, 9086 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-03 19:58:38,440 INFO L231 Difference]: Finished difference. Result has 307 places, 470 transitions, 8102 flow [2024-06-03 19:58:38,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7945, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8102, PETRI_PLACES=307, PETRI_TRANSITIONS=470} [2024-06-03 19:58:38,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-03 19:58:38,440 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 470 transitions, 8102 flow [2024-06-03 19:58:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:38,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:38,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:58:38,441 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1562304235, now seen corresponding path program 5 times [2024-06-03 19:58:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029119327] [2024-06-03 19:58:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029119327] [2024-06-03 19:58:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029119327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:38,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:38,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:58:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045302690] [2024-06-03 19:58:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:58:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:58:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:58:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:38,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 470 transitions, 8102 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:38,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:38,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:38,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:41,389 INFO L124 PetriNetUnfolderBase]: 7494/11621 cut-off events. [2024-06-03 19:58:41,390 INFO L125 PetriNetUnfolderBase]: For 949071/949073 co-relation queries the response was YES. [2024-06-03 19:58:41,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96824 conditions, 11621 events. 7494/11621 cut-off events. For 949071/949073 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 74148 event pairs, 2516 based on Foata normal form. 5/11625 useless extension candidates. Maximal degree in co-relation 96674. Up to 11562 conditions per place. [2024-06-03 19:58:41,557 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 453 selfloop transitions, 25 changer transitions 1/482 dead transitions. [2024-06-03 19:58:41,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 482 transitions, 9107 flow [2024-06-03 19:58:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:58:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:58:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:58:41,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 19:58:41,558 INFO L175 Difference]: Start difference. First operand has 307 places, 470 transitions, 8102 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:58:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 482 transitions, 9107 flow [2024-06-03 19:58:43,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 482 transitions, 8846 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 19:58:43,502 INFO L231 Difference]: Finished difference. Result has 307 places, 469 transitions, 7882 flow [2024-06-03 19:58:43,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7882, PETRI_PLACES=307, PETRI_TRANSITIONS=469} [2024-06-03 19:58:43,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-03 19:58:43,503 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 469 transitions, 7882 flow [2024-06-03 19:58:43,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:43,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:43,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:58:43,503 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:43,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -111803127, now seen corresponding path program 6 times [2024-06-03 19:58:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:43,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595830687] [2024-06-03 19:58:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:44,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:44,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595830687] [2024-06-03 19:58:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595830687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:44,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:44,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:58:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432051650] [2024-06-03 19:58:44,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:58:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:58:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:58:44,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:44,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 469 transitions, 7882 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:44,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:44,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:44,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:46,363 INFO L124 PetriNetUnfolderBase]: 7173/11073 cut-off events. [2024-06-03 19:58:46,363 INFO L125 PetriNetUnfolderBase]: For 944102/944104 co-relation queries the response was YES. [2024-06-03 19:58:46,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92037 conditions, 11073 events. 7173/11073 cut-off events. For 944102/944104 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 69669 event pairs, 2361 based on Foata normal form. 8/11080 useless extension candidates. Maximal degree in co-relation 91887. Up to 10878 conditions per place. [2024-06-03 19:58:46,531 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 419 selfloop transitions, 44 changer transitions 17/483 dead transitions. [2024-06-03 19:58:46,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 483 transitions, 8899 flow [2024-06-03 19:58:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:58:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:58:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:58:46,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 19:58:46,532 INFO L175 Difference]: Start difference. First operand has 307 places, 469 transitions, 7882 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:58:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 483 transitions, 8899 flow [2024-06-03 19:58:48,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 483 transitions, 8699 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-03 19:58:48,563 INFO L231 Difference]: Finished difference. Result has 303 places, 452 transitions, 7491 flow [2024-06-03 19:58:48,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7491, PETRI_PLACES=303, PETRI_TRANSITIONS=452} [2024-06-03 19:58:48,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-03 19:58:48,563 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 452 transitions, 7491 flow [2024-06-03 19:58:48,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:48,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:48,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:48,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:58:48,564 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:48,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash -98908584, now seen corresponding path program 1 times [2024-06-03 19:58:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:48,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450893930] [2024-06-03 19:58:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:49,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450893930] [2024-06-03 19:58:49,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450893930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:49,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:49,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184681080] [2024-06-03 19:58:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:49,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:49,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 452 transitions, 7491 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:49,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:49,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:49,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:51,555 INFO L124 PetriNetUnfolderBase]: 6783/10463 cut-off events. [2024-06-03 19:58:51,555 INFO L125 PetriNetUnfolderBase]: For 912180/912182 co-relation queries the response was YES. [2024-06-03 19:58:51,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88154 conditions, 10463 events. 6783/10463 cut-off events. For 912180/912182 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 65219 event pairs, 2078 based on Foata normal form. 14/10476 useless extension candidates. Maximal degree in co-relation 88005. Up to 10215 conditions per place. [2024-06-03 19:58:51,696 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 63 changer transitions 0/492 dead transitions. [2024-06-03 19:58:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 492 transitions, 9070 flow [2024-06-03 19:58:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:58:51,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 19:58:51,697 INFO L175 Difference]: Start difference. First operand has 303 places, 452 transitions, 7491 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:58:51,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 492 transitions, 9070 flow [2024-06-03 19:58:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 492 transitions, 8867 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 19:58:53,433 INFO L231 Difference]: Finished difference. Result has 304 places, 475 transitions, 7933 flow [2024-06-03 19:58:53,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7933, PETRI_PLACES=304, PETRI_TRANSITIONS=475} [2024-06-03 19:58:53,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 19:58:53,433 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 475 transitions, 7933 flow [2024-06-03 19:58:53,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:53,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:53,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:53,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:58:53,434 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:53,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash -111807095, now seen corresponding path program 3 times [2024-06-03 19:58:53,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:53,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069179983] [2024-06-03 19:58:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069179983] [2024-06-03 19:58:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069179983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:54,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:58:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437205632] [2024-06-03 19:58:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:54,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:58:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:58:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:58:54,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:54,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 475 transitions, 7933 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:54,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:54,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:54,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:58:56,531 INFO L124 PetriNetUnfolderBase]: 6814/10504 cut-off events. [2024-06-03 19:58:56,531 INFO L125 PetriNetUnfolderBase]: For 924022/924024 co-relation queries the response was YES. [2024-06-03 19:58:56,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90283 conditions, 10504 events. 6814/10504 cut-off events. For 924022/924024 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 65399 event pairs, 2069 based on Foata normal form. 22/10525 useless extension candidates. Maximal degree in co-relation 90131. Up to 10077 conditions per place. [2024-06-03 19:58:56,678 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 416 selfloop transitions, 86 changer transitions 0/505 dead transitions. [2024-06-03 19:58:56,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 505 transitions, 9365 flow [2024-06-03 19:58:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:58:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:58:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:58:56,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 19:58:56,679 INFO L175 Difference]: Start difference. First operand has 304 places, 475 transitions, 7933 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:58:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 505 transitions, 9365 flow [2024-06-03 19:58:58,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 505 transitions, 8942 flow, removed 133 selfloop flow, removed 5 redundant places. [2024-06-03 19:58:58,633 INFO L231 Difference]: Finished difference. Result has 308 places, 487 transitions, 7959 flow [2024-06-03 19:58:58,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7514, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7959, PETRI_PLACES=308, PETRI_TRANSITIONS=487} [2024-06-03 19:58:58,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-03 19:58:58,633 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 487 transitions, 7959 flow [2024-06-03 19:58:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:58,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:58:58,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:58:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:58:58,634 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:58:58,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:58:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -610874771, now seen corresponding path program 1 times [2024-06-03 19:58:58,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:58:58,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154444985] [2024-06-03 19:58:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:58:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:58:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:58:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:58:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:58:59,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154444985] [2024-06-03 19:58:59,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154444985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:58:59,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:58:59,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:58:59,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91182201] [2024-06-03 19:58:59,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:58:59,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:58:59,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:58:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:58:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:58:59,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:58:59,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 487 transitions, 7959 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:58:59,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:58:59,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:58:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:02,218 INFO L124 PetriNetUnfolderBase]: 7434/11456 cut-off events. [2024-06-03 19:59:02,218 INFO L125 PetriNetUnfolderBase]: For 1208239/1208241 co-relation queries the response was YES. [2024-06-03 19:59:02,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103258 conditions, 11456 events. 7434/11456 cut-off events. For 1208239/1208241 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 71898 event pairs, 1786 based on Foata normal form. 24/11479 useless extension candidates. Maximal degree in co-relation 103105. Up to 7867 conditions per place. [2024-06-03 19:59:02,409 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 381 selfloop transitions, 167 changer transitions 0/551 dead transitions. [2024-06-03 19:59:02,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 551 transitions, 9873 flow [2024-06-03 19:59:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 19:59:02,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-03 19:59:02,410 INFO L175 Difference]: Start difference. First operand has 308 places, 487 transitions, 7959 flow. Second operand 9 states and 191 transitions. [2024-06-03 19:59:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 551 transitions, 9873 flow [2024-06-03 19:59:04,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 551 transitions, 9575 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 19:59:04,891 INFO L231 Difference]: Finished difference. Result has 315 places, 494 transitions, 8265 flow [2024-06-03 19:59:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8265, PETRI_PLACES=315, PETRI_TRANSITIONS=494} [2024-06-03 19:59:04,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 19:59:04,891 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 494 transitions, 8265 flow [2024-06-03 19:59:04,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:04,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:04,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:59:04,892 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:04,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash -610635451, now seen corresponding path program 1 times [2024-06-03 19:59:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158606036] [2024-06-03 19:59:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158606036] [2024-06-03 19:59:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158606036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527171215] [2024-06-03 19:59:05,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:06,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:06,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 494 transitions, 8265 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:06,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:06,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:08,711 INFO L124 PetriNetUnfolderBase]: 7570/11645 cut-off events. [2024-06-03 19:59:08,711 INFO L125 PetriNetUnfolderBase]: For 1236696/1236698 co-relation queries the response was YES. [2024-06-03 19:59:08,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107162 conditions, 11645 events. 7570/11645 cut-off events. For 1236696/1236698 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 73396 event pairs, 1870 based on Foata normal form. 8/11652 useless extension candidates. Maximal degree in co-relation 107006. Up to 9586 conditions per place. [2024-06-03 19:59:08,912 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 310 selfloop transitions, 250 changer transitions 0/563 dead transitions. [2024-06-03 19:59:08,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 563 transitions, 10709 flow [2024-06-03 19:59:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:59:08,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-03 19:59:08,913 INFO L175 Difference]: Start difference. First operand has 315 places, 494 transitions, 8265 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:59:08,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 563 transitions, 10709 flow [2024-06-03 19:59:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 563 transitions, 10435 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:59:12,178 INFO L231 Difference]: Finished difference. Result has 320 places, 518 transitions, 9219 flow [2024-06-03 19:59:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8003, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9219, PETRI_PLACES=320, PETRI_TRANSITIONS=518} [2024-06-03 19:59:12,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 19:59:12,178 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 518 transitions, 9219 flow [2024-06-03 19:59:12,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:12,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:12,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:59:12,179 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:12,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash -610635761, now seen corresponding path program 2 times [2024-06-03 19:59:12,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:12,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600483744] [2024-06-03 19:59:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:13,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:13,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600483744] [2024-06-03 19:59:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600483744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:13,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:13,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819866596] [2024-06-03 19:59:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:13,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:13,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:13,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 518 transitions, 9219 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:13,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:13,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:16,270 INFO L124 PetriNetUnfolderBase]: 7922/12201 cut-off events. [2024-06-03 19:59:16,270 INFO L125 PetriNetUnfolderBase]: For 1499838/1499840 co-relation queries the response was YES. [2024-06-03 19:59:16,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113989 conditions, 12201 events. 7922/12201 cut-off events. For 1499838/1499840 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 77566 event pairs, 2104 based on Foata normal form. 104/12304 useless extension candidates. Maximal degree in co-relation 113830. Up to 10462 conditions per place. [2024-06-03 19:59:16,463 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 412 selfloop transitions, 158 changer transitions 2/575 dead transitions. [2024-06-03 19:59:16,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 575 transitions, 10932 flow [2024-06-03 19:59:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:59:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:59:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 19:59:16,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926829268292683 [2024-06-03 19:59:16,464 INFO L175 Difference]: Start difference. First operand has 320 places, 518 transitions, 9219 flow. Second operand 10 states and 202 transitions. [2024-06-03 19:59:16,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 575 transitions, 10932 flow [2024-06-03 19:59:18,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 575 transitions, 10723 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-03 19:59:18,993 INFO L231 Difference]: Finished difference. Result has 327 places, 522 transitions, 9475 flow [2024-06-03 19:59:18,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9010, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9475, PETRI_PLACES=327, PETRI_TRANSITIONS=522} [2024-06-03 19:59:18,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 19:59:18,994 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 522 transitions, 9475 flow [2024-06-03 19:59:18,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:18,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:18,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:18,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:59:18,994 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:18,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash -602303581, now seen corresponding path program 2 times [2024-06-03 19:59:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819812680] [2024-06-03 19:59:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:20,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:20,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819812680] [2024-06-03 19:59:20,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819812680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:20,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:20,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:20,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406920640] [2024-06-03 19:59:20,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:20,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:20,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:20,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:20,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 522 transitions, 9475 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:20,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:20,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:23,409 INFO L124 PetriNetUnfolderBase]: 7966/12262 cut-off events. [2024-06-03 19:59:23,409 INFO L125 PetriNetUnfolderBase]: For 1301641/1301643 co-relation queries the response was YES. [2024-06-03 19:59:23,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115940 conditions, 12262 events. 7966/12262 cut-off events. For 1301641/1301643 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 78206 event pairs, 1997 based on Foata normal form. 8/12269 useless extension candidates. Maximal degree in co-relation 115780. Up to 10748 conditions per place. [2024-06-03 19:59:23,581 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 364 selfloop transitions, 208 changer transitions 0/575 dead transitions. [2024-06-03 19:59:23,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 575 transitions, 11657 flow [2024-06-03 19:59:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:59:23,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-03 19:59:23,582 INFO L175 Difference]: Start difference. First operand has 327 places, 522 transitions, 9475 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:59:23,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 575 transitions, 11657 flow [2024-06-03 19:59:26,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 575 transitions, 11329 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-03 19:59:26,387 INFO L231 Difference]: Finished difference. Result has 331 places, 536 transitions, 9919 flow [2024-06-03 19:59:26,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9919, PETRI_PLACES=331, PETRI_TRANSITIONS=536} [2024-06-03 19:59:26,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-03 19:59:26,388 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 536 transitions, 9919 flow [2024-06-03 19:59:26,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:26,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:26,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:26,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:59:26,388 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:26,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1339065153, now seen corresponding path program 3 times [2024-06-03 19:59:26,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:26,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864434591] [2024-06-03 19:59:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:26,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:27,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864434591] [2024-06-03 19:59:27,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864434591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:27,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:27,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462245673] [2024-06-03 19:59:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:27,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:27,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 536 transitions, 9919 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:27,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:27,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:27,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:30,962 INFO L124 PetriNetUnfolderBase]: 8042/12370 cut-off events. [2024-06-03 19:59:30,962 INFO L125 PetriNetUnfolderBase]: For 1336224/1336226 co-relation queries the response was YES. [2024-06-03 19:59:31,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117280 conditions, 12370 events. 8042/12370 cut-off events. For 1336224/1336226 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 78857 event pairs, 2111 based on Foata normal form. 10/12379 useless extension candidates. Maximal degree in co-relation 117118. Up to 11456 conditions per place. [2024-06-03 19:59:31,273 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 470 selfloop transitions, 100 changer transitions 0/573 dead transitions. [2024-06-03 19:59:31,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 573 transitions, 11396 flow [2024-06-03 19:59:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:59:31,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 19:59:31,274 INFO L175 Difference]: Start difference. First operand has 331 places, 536 transitions, 9919 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:59:31,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 573 transitions, 11396 flow [2024-06-03 19:59:33,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 573 transitions, 11140 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-03 19:59:33,855 INFO L231 Difference]: Finished difference. Result has 338 places, 545 transitions, 10108 flow [2024-06-03 19:59:33,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9667, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10108, PETRI_PLACES=338, PETRI_TRANSITIONS=545} [2024-06-03 19:59:33,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-03 19:59:33,856 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 545 transitions, 10108 flow [2024-06-03 19:59:33,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:33,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:33,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:59:33,856 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:33,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1339052257, now seen corresponding path program 1 times [2024-06-03 19:59:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167491660] [2024-06-03 19:59:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:34,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167491660] [2024-06-03 19:59:34,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167491660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:34,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:34,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412911694] [2024-06-03 19:59:34,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:35,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:35,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 545 transitions, 10108 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:35,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:35,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:38,415 INFO L124 PetriNetUnfolderBase]: 8050/12380 cut-off events. [2024-06-03 19:59:38,415 INFO L125 PetriNetUnfolderBase]: For 1352320/1352320 co-relation queries the response was YES. [2024-06-03 19:59:38,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117947 conditions, 12380 events. 8050/12380 cut-off events. For 1352320/1352320 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 79022 event pairs, 2534 based on Foata normal form. 2/12381 useless extension candidates. Maximal degree in co-relation 117782. Up to 12316 conditions per place. [2024-06-03 19:59:38,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 540 selfloop transitions, 27 changer transitions 0/570 dead transitions. [2024-06-03 19:59:38,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 570 transitions, 11395 flow [2024-06-03 19:59:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:59:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:59:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:59:38,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 19:59:38,583 INFO L175 Difference]: Start difference. First operand has 338 places, 545 transitions, 10108 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:59:38,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 570 transitions, 11395 flow [2024-06-03 19:59:41,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 570 transitions, 11163 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:59:41,947 INFO L231 Difference]: Finished difference. Result has 343 places, 549 transitions, 10029 flow [2024-06-03 19:59:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9876, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10029, PETRI_PLACES=343, PETRI_TRANSITIONS=549} [2024-06-03 19:59:41,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-03 19:59:41,948 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 549 transitions, 10029 flow [2024-06-03 19:59:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:59:41,948 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:41,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1339411113, now seen corresponding path program 4 times [2024-06-03 19:59:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966985818] [2024-06-03 19:59:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:43,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966985818] [2024-06-03 19:59:43,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966985818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:43,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:43,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148538048] [2024-06-03 19:59:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:43,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:43,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:43,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 549 transitions, 10029 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:43,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:43,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:43,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:46,456 INFO L124 PetriNetUnfolderBase]: 8018/12338 cut-off events. [2024-06-03 19:59:46,456 INFO L125 PetriNetUnfolderBase]: For 1373981/1373983 co-relation queries the response was YES. [2024-06-03 19:59:46,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116688 conditions, 12338 events. 8018/12338 cut-off events. For 1373981/1373983 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 78620 event pairs, 2117 based on Foata normal form. 10/12347 useless extension candidates. Maximal degree in co-relation 116521. Up to 11424 conditions per place. [2024-06-03 19:59:46,621 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 470 selfloop transitions, 104 changer transitions 0/577 dead transitions. [2024-06-03 19:59:46,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 577 transitions, 11291 flow [2024-06-03 19:59:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:59:46,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:59:46,622 INFO L175 Difference]: Start difference. First operand has 343 places, 549 transitions, 10029 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:59:46,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 577 transitions, 11291 flow [2024-06-03 19:59:49,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 577 transitions, 11093 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:59:49,789 INFO L231 Difference]: Finished difference. Result has 347 places, 549 transitions, 10047 flow [2024-06-03 19:59:49,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9831, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10047, PETRI_PLACES=347, PETRI_TRANSITIONS=549} [2024-06-03 19:59:49,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 19:59:49,790 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 549 transitions, 10047 flow [2024-06-03 19:59:49,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:49,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:49,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:59:49,791 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:49,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1339421653, now seen corresponding path program 3 times [2024-06-03 19:59:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256507222] [2024-06-03 19:59:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256507222] [2024-06-03 19:59:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256507222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:50,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:50,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799079384] [2024-06-03 19:59:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:50,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:50,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:50,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 549 transitions, 10047 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:50,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:50,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:50,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:59:54,137 INFO L124 PetriNetUnfolderBase]: 8108/12480 cut-off events. [2024-06-03 19:59:54,137 INFO L125 PetriNetUnfolderBase]: For 1452394/1452396 co-relation queries the response was YES. [2024-06-03 19:59:54,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118703 conditions, 12480 events. 8108/12480 cut-off events. For 1452394/1452396 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 79812 event pairs, 2344 based on Foata normal form. 22/12501 useless extension candidates. Maximal degree in co-relation 118535. Up to 11837 conditions per place. [2024-06-03 19:59:54,322 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 478 selfloop transitions, 103 changer transitions 0/584 dead transitions. [2024-06-03 19:59:54,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 584 transitions, 11927 flow [2024-06-03 19:59:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:59:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:59:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:59:54,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-03 19:59:54,323 INFO L175 Difference]: Start difference. First operand has 347 places, 549 transitions, 10047 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:59:54,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 584 transitions, 11927 flow [2024-06-03 19:59:57,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 584 transitions, 11657 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 19:59:58,005 INFO L231 Difference]: Finished difference. Result has 349 places, 553 transitions, 10097 flow [2024-06-03 19:59:58,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9777, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10097, PETRI_PLACES=349, PETRI_TRANSITIONS=553} [2024-06-03 19:59:58,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-03 19:59:58,006 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 553 transitions, 10097 flow [2024-06-03 19:59:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:58,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:59:58,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:59:58,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:59:58,006 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:59:58,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:59:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1339421343, now seen corresponding path program 5 times [2024-06-03 19:59:58,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:59:58,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533930335] [2024-06-03 19:59:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:59:58,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:59:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:59:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:59:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:59:58,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533930335] [2024-06-03 19:59:58,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533930335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:59:58,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:59:58,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:59:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685033802] [2024-06-03 19:59:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:59:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:59:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:59:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:59:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:59:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 19:59:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 553 transitions, 10097 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:59:59,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:59:59,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 19:59:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:02,508 INFO L124 PetriNetUnfolderBase]: 8200/12608 cut-off events. [2024-06-03 20:00:02,508 INFO L125 PetriNetUnfolderBase]: For 1464884/1464886 co-relation queries the response was YES. [2024-06-03 20:00:02,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120644 conditions, 12608 events. 8200/12608 cut-off events. For 1464884/1464886 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 80555 event pairs, 2055 based on Foata normal form. 8/12615 useless extension candidates. Maximal degree in co-relation 120476. Up to 11015 conditions per place. [2024-06-03 20:00:02,840 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 392 selfloop transitions, 205 changer transitions 0/600 dead transitions. [2024-06-03 20:00:02,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 600 transitions, 12386 flow [2024-06-03 20:00:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:00:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:00:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:00:02,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-03 20:00:02,841 INFO L175 Difference]: Start difference. First operand has 349 places, 553 transitions, 10097 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:00:02,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 600 transitions, 12386 flow [2024-06-03 20:00:06,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 600 transitions, 12130 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:00:06,428 INFO L231 Difference]: Finished difference. Result has 352 places, 567 transitions, 10681 flow [2024-06-03 20:00:06,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9849, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10681, PETRI_PLACES=352, PETRI_TRANSITIONS=567} [2024-06-03 20:00:06,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:00:06,428 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 567 transitions, 10681 flow [2024-06-03 20:00:06,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:06,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:00:06,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:00:06,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:00:06,429 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:00:06,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:00:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -422948031, now seen corresponding path program 1 times [2024-06-03 20:00:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:00:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600830452] [2024-06-03 20:00:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:00:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:00:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:00:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:00:07,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:00:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600830452] [2024-06-03 20:00:07,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600830452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:00:07,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:00:07,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:00:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513388130] [2024-06-03 20:00:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:00:07,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:00:07,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:00:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:00:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:00:07,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:00:07,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 567 transitions, 10681 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:00:07,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:00:07,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:00:07,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:00:10,693 INFO L124 PetriNetUnfolderBase]: 8177/12573 cut-off events. [2024-06-03 20:00:10,693 INFO L125 PetriNetUnfolderBase]: For 1451179/1451179 co-relation queries the response was YES. [2024-06-03 20:00:10,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120545 conditions, 12573 events. 8177/12573 cut-off events. For 1451179/1451179 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 80339 event pairs, 2588 based on Foata normal form. 9/12581 useless extension candidates. Maximal degree in co-relation 120375. Up to 12454 conditions per place. [2024-06-03 20:00:10,882 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 543 selfloop transitions, 44 changer transitions 0/590 dead transitions. [2024-06-03 20:00:10,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 590 transitions, 12030 flow [2024-06-03 20:00:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:00:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:00:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:00:10,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:00:10,884 INFO L175 Difference]: Start difference. First operand has 352 places, 567 transitions, 10681 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:00:10,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 590 transitions, 12030 flow