./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016.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/mix016.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/mix016.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix016.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 19:20:39,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:20:39,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:20:39,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:20:39,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:20:39,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:20:39,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:20:39,500 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:20:39,500 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:20:39,501 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:20:39,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:20:39,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:20:39,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:20:39,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:20:39,504 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:20:39,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:20:39,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:20:39,507 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:20:39,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:20:39,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:20:39,509 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:20:39,509 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:20:39,509 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:20:39,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:20:39,510 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:20:39,510 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:20:39,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:20:39,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:20:39,511 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:20:39,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:20:39,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:20:39,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:20:39,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:20:39,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:20:39,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:20:39,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:20:39,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:20:39,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:20:39,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:20:39,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:20:39,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:20:39,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:20:39,780 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:20:39,781 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:20:39,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016.oepc.yml/witness.yml [2024-06-03 19:20:39,900 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:20:39,900 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:20:39,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-03 19:20:40,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:20:41,126 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:20:41,132 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016.oepc.i [2024-06-03 19:20:41,147 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b3744a4/5ba180507ae248a5bd3708d6f26e0aac/FLAG3eeb4fc41 [2024-06-03 19:20:41,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b3744a4/5ba180507ae248a5bd3708d6f26e0aac [2024-06-03 19:20:41,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:20:41,174 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:20:41,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:20:41,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:20:41,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:20:41,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:39" (1/2) ... [2024-06-03 19:20:41,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7598bdcf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:41, skipping insertion in model container [2024-06-03 19:20:41,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:39" (1/2) ... [2024-06-03 19:20:41,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b6797a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:41, skipping insertion in model container [2024-06-03 19:20:41,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:20:41" (2/2) ... [2024-06-03 19:20:41,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7598bdcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41, skipping insertion in model container [2024-06-03 19:20:41,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:20:41" (2/2) ... [2024-06-03 19:20:41,188 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:20:41,264 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:20:41,265 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-03 19:20:41,266 INFO L97 edCorrectnessWitness]: Location invariant before [L845-L845] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-03 19:20:41,266 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-03 19:20:41,266 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:20:41,266 INFO L106 edCorrectnessWitness]: ghost_update [L841-L841] multithreaded = 1; [2024-06-03 19:20:41,305 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:20:41,639 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:20:41,647 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:20:41,765 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:20:41,796 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:20:41,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41 WrapperNode [2024-06-03 19:20:41,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:20:41,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:20:41,799 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:20:41,799 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:20:41,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,866 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-03 19:20:41,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:20:41,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:20:41,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:20:41,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:20:41,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,885 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,898 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 19:20:41,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:20:41,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:20:41,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:20:41,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:20:41,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (1/1) ... [2024-06-03 19:20:41,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:20:41,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:20:42,038 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 19:20:42,089 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 19:20:42,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:20:42,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:20:42,102 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:20:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:20:42,102 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:20:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:20:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:20:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:20:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:20:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:20:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:20:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:20:42,104 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 19:20:42,244 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:20:42,247 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:20:42,567 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:20:42,567 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:20:42,689 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:20:42,689 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:20:42,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:20:42 BoogieIcfgContainer [2024-06-03 19:20:42,690 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:20:42,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:20:42,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:20:42,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:20:42,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:39" (1/4) ... [2024-06-03 19:20:42,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214b495c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:20:42, skipping insertion in model container [2024-06-03 19:20:42,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:20:41" (2/4) ... [2024-06-03 19:20:42,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214b495c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:20:42, skipping insertion in model container [2024-06-03 19:20:42,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:41" (3/4) ... [2024-06-03 19:20:42,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214b495c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:20:42, skipping insertion in model container [2024-06-03 19:20:42,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:20:42" (4/4) ... [2024-06-03 19:20:42,696 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016.oepc.i [2024-06-03 19:20:42,709 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:20:42,709 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:20:42,709 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:20:42,777 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:20:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:20:42,824 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 19:20:42,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:20:42,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:20:42,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:20:42,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 19:20:42,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:20:42,842 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;@20b24f91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:20:42,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:20:42,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:20:42,846 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:20:42,846 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:20:42,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:42,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:20:42,847 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 19:20:42,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1248596661, now seen corresponding path program 1 times [2024-06-03 19:20:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116037550] [2024-06-03 19:20:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:42,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:43,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:43,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116037550] [2024-06-03 19:20:43,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116037550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:43,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:43,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:20:43,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850840578] [2024-06-03 19:20:43,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:43,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:20:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:20:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:20:43,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 19:20:43,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:43,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:43,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 19:20:43,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:44,204 INFO L124 PetriNetUnfolderBase]: 1116/1757 cut-off events. [2024-06-03 19:20:44,204 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 19:20:44,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1757 events. 1116/1757 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8469 event pairs, 765 based on Foata normal form. 1/1728 useless extension candidates. Maximal degree in co-relation 3495. Up to 1676 conditions per place. [2024-06-03 19:20:44,216 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 19:20:44,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-03 19:20:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:20:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:20:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-03 19:20:44,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 19:20:44,226 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-03 19:20:44,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-03 19:20:44,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:44,230 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 19:20:44,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 19:20:44,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 19:20:44,234 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 19:20:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:44,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:44,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:20:44,235 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 19:20:44,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1605470230, now seen corresponding path program 1 times [2024-06-03 19:20:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312653144] [2024-06-03 19:20:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:44,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312653144] [2024-06-03 19:20:44,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312653144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:44,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:20:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140068547] [2024-06-03 19:20:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:20:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:20:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:20:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 19:20:44,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:44,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:44,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 19:20:44,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:45,015 INFO L124 PetriNetUnfolderBase]: 1110/1756 cut-off events. [2024-06-03 19:20:45,015 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-03 19:20:45,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1756 events. 1110/1756 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8528 event pairs, 641 based on Foata normal form. 3/1757 useless extension candidates. Maximal degree in co-relation 3964. Up to 1652 conditions per place. [2024-06-03 19:20:45,023 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 19:20:45,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-03 19:20:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:20:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:20:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-03 19:20:45,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 19:20:45,024 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-03 19:20:45,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-03 19:20:45,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:45,026 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 19:20:45,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 19:20:45,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 19:20:45,027 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 19:20:45,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:45,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:45,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:20:45,028 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 19:20:45,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash -963584375, now seen corresponding path program 1 times [2024-06-03 19:20:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930956141] [2024-06-03 19:20:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:45,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:45,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930956141] [2024-06-03 19:20:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930956141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:45,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:45,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929423153] [2024-06-03 19:20:45,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:45,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:45,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 19:20:45,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:45,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:45,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 19:20:45,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:46,295 INFO L124 PetriNetUnfolderBase]: 1345/2103 cut-off events. [2024-06-03 19:20:46,295 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-03 19:20:46,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 2103 events. 1345/2103 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10170 event pairs, 592 based on Foata normal form. 3/2104 useless extension candidates. Maximal degree in co-relation 5267. Up to 1965 conditions per place. [2024-06-03 19:20:46,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-03 19:20:46,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-03 19:20:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 19:20:46,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-03 19:20:46,306 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-03 19:20:46,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-03 19:20:46,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:20:46,308 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-03 19:20:46,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-03 19:20:46,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-03 19:20:46,309 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-03 19:20:46,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:46,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:46,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:20:46,310 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 19:20:46,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 193656989, now seen corresponding path program 1 times [2024-06-03 19:20:46,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539851116] [2024-06-03 19:20:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:47,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539851116] [2024-06-03 19:20:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539851116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:47,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:47,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32836863] [2024-06-03 19:20:47,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:47,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 19:20:47,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:47,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:47,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 19:20:47,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:47,728 INFO L124 PetriNetUnfolderBase]: 1336/2086 cut-off events. [2024-06-03 19:20:47,729 INFO L125 PetriNetUnfolderBase]: For 2178/2178 co-relation queries the response was YES. [2024-06-03 19:20:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5857 conditions, 2086 events. 1336/2086 cut-off events. For 2178/2178 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10079 event pairs, 450 based on Foata normal form. 6/2090 useless extension candidates. Maximal degree in co-relation 5838. Up to 1920 conditions per place. [2024-06-03 19:20:47,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-03 19:20:47,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-03 19:20:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 19:20:47,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 19:20:47,740 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-03 19:20:47,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-03 19:20:47,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:47,743 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-03 19:20:47,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 19:20:47,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-03 19:20:47,744 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-03 19:20:47,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:47,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:20:47,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:47,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash -760605331, now seen corresponding path program 1 times [2024-06-03 19:20:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343746907] [2024-06-03 19:20:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:48,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:48,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343746907] [2024-06-03 19:20:48,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343746907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:48,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:48,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856307392] [2024-06-03 19:20:48,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:48,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:48,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:48,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:48,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:48,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:48,782 INFO L124 PetriNetUnfolderBase]: 1326/2106 cut-off events. [2024-06-03 19:20:48,782 INFO L125 PetriNetUnfolderBase]: For 3261/3261 co-relation queries the response was YES. [2024-06-03 19:20:48,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 2106 events. 1326/2106 cut-off events. For 3261/3261 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10265 event pairs, 517 based on Foata normal form. 4/2108 useless extension candidates. Maximal degree in co-relation 6206. Up to 1963 conditions per place. [2024-06-03 19:20:48,793 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-03 19:20:48,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 375 flow [2024-06-03 19:20:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:20:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:20:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-03 19:20:48,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-03 19:20:48,794 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 97 transitions. [2024-06-03 19:20:48,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 375 flow [2024-06-03 19:20:48,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:20:48,798 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-03 19:20:48,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-03 19:20:48,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-03 19:20:48,799 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-03 19:20:48,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:48,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:48,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:20:48,799 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 19:20:48,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -437286924, now seen corresponding path program 1 times [2024-06-03 19:20:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024920140] [2024-06-03 19:20:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:49,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024920140] [2024-06-03 19:20:49,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024920140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:49,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:49,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:49,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346037451] [2024-06-03 19:20:49,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:49,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:49,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:49,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:49,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:49,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:49,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:49,906 INFO L124 PetriNetUnfolderBase]: 1364/2156 cut-off events. [2024-06-03 19:20:49,906 INFO L125 PetriNetUnfolderBase]: For 4528/4528 co-relation queries the response was YES. [2024-06-03 19:20:49,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 2156 events. 1364/2156 cut-off events. For 4528/4528 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10493 event pairs, 487 based on Foata normal form. 4/2157 useless extension candidates. Maximal degree in co-relation 6810. Up to 1970 conditions per place. [2024-06-03 19:20:49,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-03 19:20:49,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 510 flow [2024-06-03 19:20:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 19:20:49,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 19:20:49,918 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 122 transitions. [2024-06-03 19:20:49,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 510 flow [2024-06-03 19:20:49,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:49,921 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 310 flow [2024-06-03 19:20:49,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-03 19:20:49,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-03 19:20:49,922 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 310 flow [2024-06-03 19:20:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:49,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:49,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:49,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:20:49,923 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 19:20:49,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash -424567314, now seen corresponding path program 2 times [2024-06-03 19:20:49,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:49,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083196154] [2024-06-03 19:20:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:50,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083196154] [2024-06-03 19:20:50,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083196154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:50,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:50,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:50,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77730292] [2024-06-03 19:20:50,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:50,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:50,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:50,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:50,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:50,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:50,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:50,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:50,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:51,149 INFO L124 PetriNetUnfolderBase]: 1354/2145 cut-off events. [2024-06-03 19:20:51,150 INFO L125 PetriNetUnfolderBase]: For 6184/6184 co-relation queries the response was YES. [2024-06-03 19:20:51,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 2145 events. 1354/2145 cut-off events. For 6184/6184 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10440 event pairs, 496 based on Foata normal form. 4/2147 useless extension candidates. Maximal degree in co-relation 7421. Up to 1995 conditions per place. [2024-06-03 19:20:51,161 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-03 19:20:51,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 490 flow [2024-06-03 19:20:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 19:20:51,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:20:51,163 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 310 flow. Second operand 6 states and 114 transitions. [2024-06-03 19:20:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 490 flow [2024-06-03 19:20:51,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 462 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:51,169 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-03 19:20:51,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-03 19:20:51,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-03 19:20:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-03 19:20:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:51,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:51,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:20:51,171 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 19:20:51,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 877834162, now seen corresponding path program 1 times [2024-06-03 19:20:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:51,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334268668] [2024-06-03 19:20:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:52,001 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 19:20:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:52,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334268668] [2024-06-03 19:20:52,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334268668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:52,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:52,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887388332] [2024-06-03 19:20:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:52,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:52,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:52,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:52,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:52,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:52,543 INFO L124 PetriNetUnfolderBase]: 1376/2167 cut-off events. [2024-06-03 19:20:52,544 INFO L125 PetriNetUnfolderBase]: For 7393/7393 co-relation queries the response was YES. [2024-06-03 19:20:52,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 2167 events. 1376/2167 cut-off events. For 7393/7393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10507 event pairs, 489 based on Foata normal form. 4/2169 useless extension candidates. Maximal degree in co-relation 7633. Up to 2006 conditions per place. [2024-06-03 19:20:52,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-03 19:20:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-03 19:20:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:20:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 19:20:52,557 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:20:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-03 19:20:52,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:52,562 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-03 19:20:52,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:20:52,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 19:20:52,562 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-03 19:20:52,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:52,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:52,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:20:52,563 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 19:20:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -670991756, now seen corresponding path program 2 times [2024-06-03 19:20:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754581212] [2024-06-03 19:20:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:53,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754581212] [2024-06-03 19:20:53,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754581212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:53,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141793147] [2024-06-03 19:20:53,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:53,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:53,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:53,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:53,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:53,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:53,826 INFO L124 PetriNetUnfolderBase]: 1414/2221 cut-off events. [2024-06-03 19:20:53,826 INFO L125 PetriNetUnfolderBase]: For 9499/9499 co-relation queries the response was YES. [2024-06-03 19:20:53,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8402 conditions, 2221 events. 1414/2221 cut-off events. For 9499/9499 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10808 event pairs, 467 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 8376. Up to 1964 conditions per place. [2024-06-03 19:20:53,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-03 19:20:53,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 684 flow [2024-06-03 19:20:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 19:20:53,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-03 19:20:53,845 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 142 transitions. [2024-06-03 19:20:53,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 684 flow [2024-06-03 19:20:53,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:20:53,851 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 426 flow [2024-06-03 19:20:53,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-03 19:20:53,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-03 19:20:53,852 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 426 flow [2024-06-03 19:20:53,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:53,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:53,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:20:53,852 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 19:20:53,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash -276683846, now seen corresponding path program 3 times [2024-06-03 19:20:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:53,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014754750] [2024-06-03 19:20:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:54,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014754750] [2024-06-03 19:20:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014754750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:54,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:54,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:54,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968763098] [2024-06-03 19:20:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:54,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:54,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:54,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:55,155 INFO L124 PetriNetUnfolderBase]: 1404/2210 cut-off events. [2024-06-03 19:20:55,155 INFO L125 PetriNetUnfolderBase]: For 11926/11926 co-relation queries the response was YES. [2024-06-03 19:20:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 2210 events. 1404/2210 cut-off events. For 11926/11926 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10754 event pairs, 491 based on Foata normal form. 4/2212 useless extension candidates. Maximal degree in co-relation 8805. Up to 2045 conditions per place. [2024-06-03 19:20:55,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-03 19:20:55,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 648 flow [2024-06-03 19:20:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:20:55,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-03 19:20:55,167 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 426 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:20:55,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 648 flow [2024-06-03 19:20:55,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 592 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:55,177 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 406 flow [2024-06-03 19:20:55,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-03 19:20:55,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-03 19:20:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 406 flow [2024-06-03 19:20:55,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:55,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:20:55,182 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 19:20:55,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1055216596, now seen corresponding path program 1 times [2024-06-03 19:20:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:55,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351729272] [2024-06-03 19:20:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:55,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:56,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:56,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351729272] [2024-06-03 19:20:56,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351729272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:56,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:56,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047539482] [2024-06-03 19:20:56,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:56,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:56,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:20:56,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 406 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:56,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:56,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:20:56,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:56,928 INFO L124 PetriNetUnfolderBase]: 1710/2636 cut-off events. [2024-06-03 19:20:56,928 INFO L125 PetriNetUnfolderBase]: For 15801/15801 co-relation queries the response was YES. [2024-06-03 19:20:56,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10499 conditions, 2636 events. 1710/2636 cut-off events. For 15801/15801 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12433 event pairs, 617 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 10470. Up to 2493 conditions per place. [2024-06-03 19:20:56,943 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-03 19:20:56,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 679 flow [2024-06-03 19:20:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:20:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-03 19:20:56,945 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 406 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:20:56,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 679 flow [2024-06-03 19:20:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 630 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:56,955 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 451 flow [2024-06-03 19:20:56,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-03 19:20:56,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-03 19:20:56,956 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 451 flow [2024-06-03 19:20:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:56,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:56,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:56,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:20:56,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:56,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash 378904292, now seen corresponding path program 1 times [2024-06-03 19:20:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:56,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020594298] [2024-06-03 19:20:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:56,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:57,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020594298] [2024-06-03 19:20:57,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020594298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:57,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:57,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:57,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649375336] [2024-06-03 19:20:57,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:57,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:57,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:57,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:20:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 451 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:57,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:20:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:58,027 INFO L124 PetriNetUnfolderBase]: 1799/2725 cut-off events. [2024-06-03 19:20:58,028 INFO L125 PetriNetUnfolderBase]: For 21039/21043 co-relation queries the response was YES. [2024-06-03 19:20:58,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 2725 events. 1799/2725 cut-off events. For 21039/21043 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12709 event pairs, 723 based on Foata normal form. 5/2711 useless extension candidates. Maximal degree in co-relation 11644. Up to 2667 conditions per place. [2024-06-03 19:20:58,042 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-03 19:20:58,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 643 flow [2024-06-03 19:20:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:20:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:20:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 19:20:58,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:20:58,043 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 451 flow. Second operand 5 states and 88 transitions. [2024-06-03 19:20:58,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 643 flow [2024-06-03 19:20:58,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 598 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:58,061 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 454 flow [2024-06-03 19:20:58,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-03 19:20:58,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-03 19:20:58,063 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 454 flow [2024-06-03 19:20:58,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:58,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:58,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:58,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:20:58,064 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 19:20:58,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash 496469163, now seen corresponding path program 1 times [2024-06-03 19:20:58,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:58,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906437999] [2024-06-03 19:20:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906437999] [2024-06-03 19:20:59,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906437999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520836109] [2024-06-03 19:20:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:59,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:59,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:20:59,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:59,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:59,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:20:59,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:59,804 INFO L124 PetriNetUnfolderBase]: 1737/2673 cut-off events. [2024-06-03 19:20:59,805 INFO L125 PetriNetUnfolderBase]: For 24230/24230 co-relation queries the response was YES. [2024-06-03 19:20:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11938 conditions, 2673 events. 1737/2673 cut-off events. For 24230/24230 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13145 event pairs, 616 based on Foata normal form. 4/2663 useless extension candidates. Maximal degree in co-relation 11906. Up to 2426 conditions per place. [2024-06-03 19:20:59,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-03 19:20:59,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 906 flow [2024-06-03 19:20:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:20:59,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-03 19:20:59,820 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 454 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:20:59,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 906 flow [2024-06-03 19:20:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 880 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:59,831 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 556 flow [2024-06-03 19:20:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-03 19:20:59,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-03 19:20:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 556 flow [2024-06-03 19:20:59,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:59,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:59,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:20:59,832 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 496559373, now seen corresponding path program 2 times [2024-06-03 19:20:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523629181] [2024-06-03 19:20:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:00,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:00,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523629181] [2024-06-03 19:21:00,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523629181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:00,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:00,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730913921] [2024-06-03 19:21:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:00,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:00,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:00,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:00,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:00,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:01,451 INFO L124 PetriNetUnfolderBase]: 1729/2663 cut-off events. [2024-06-03 19:21:01,452 INFO L125 PetriNetUnfolderBase]: For 28102/28106 co-relation queries the response was YES. [2024-06-03 19:21:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 2663 events. 1729/2663 cut-off events. For 28102/28106 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13128 event pairs, 619 based on Foata normal form. 4/2652 useless extension candidates. Maximal degree in co-relation 12470. Up to 2453 conditions per place. [2024-06-03 19:21:01,465 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 88 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-03 19:21:01,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 848 flow [2024-06-03 19:21:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:21:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 19:21:01,467 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 556 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:21:01,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 848 flow [2024-06-03 19:21:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 778 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:01,481 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 528 flow [2024-06-03 19:21:01,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-03 19:21:01,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 19:21:01,483 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 528 flow [2024-06-03 19:21:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:21:01,484 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 19:21:01,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash 500278443, now seen corresponding path program 3 times [2024-06-03 19:21:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599607904] [2024-06-03 19:21:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:02,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599607904] [2024-06-03 19:21:02,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599607904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:02,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:02,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:02,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382919194] [2024-06-03 19:21:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:02,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:02,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:02,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:02,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:02,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:03,012 INFO L124 PetriNetUnfolderBase]: 1753/2696 cut-off events. [2024-06-03 19:21:03,013 INFO L125 PetriNetUnfolderBase]: For 31703/31711 co-relation queries the response was YES. [2024-06-03 19:21:03,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12882 conditions, 2696 events. 1753/2696 cut-off events. For 31703/31711 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13326 event pairs, 582 based on Foata normal form. 4/2682 useless extension candidates. Maximal degree in co-relation 12847. Up to 2391 conditions per place. [2024-06-03 19:21:03,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 76 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2024-06-03 19:21:03,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 114 transitions, 864 flow [2024-06-03 19:21:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:21:03,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-03 19:21:03,029 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 528 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:21:03,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 114 transitions, 864 flow [2024-06-03 19:21:03,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 822 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:03,045 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 602 flow [2024-06-03 19:21:03,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-03 19:21:03,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-03 19:21:03,045 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 602 flow [2024-06-03 19:21:03,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:03,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:03,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:03,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:21:03,046 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 19:21:03,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 12736397, now seen corresponding path program 4 times [2024-06-03 19:21:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465834891] [2024-06-03 19:21:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:04,059 INFO 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 19:21:04,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:04,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465834891] [2024-06-03 19:21:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465834891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:04,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:04,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938895117] [2024-06-03 19:21:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:04,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:04,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:04,665 INFO L124 PetriNetUnfolderBase]: 1762/2711 cut-off events. [2024-06-03 19:21:04,665 INFO L125 PetriNetUnfolderBase]: For 36233/36245 co-relation queries the response was YES. [2024-06-03 19:21:04,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13565 conditions, 2711 events. 1762/2711 cut-off events. For 36233/36245 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13398 event pairs, 623 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 13529. Up to 2494 conditions per place. [2024-06-03 19:21:04,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-03 19:21:04,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 930 flow [2024-06-03 19:21:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:21:04,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 19:21:04,687 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 602 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:21:04,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 930 flow [2024-06-03 19:21:04,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 838 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:04,749 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 608 flow [2024-06-03 19:21:04,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-03 19:21:04,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-03 19:21:04,750 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 608 flow [2024-06-03 19:21:04,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:04,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:04,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:21:04,751 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 19:21:04,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1648292003, now seen corresponding path program 1 times [2024-06-03 19:21:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662431765] [2024-06-03 19:21:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:05,680 INFO 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 19:21:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662431765] [2024-06-03 19:21:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662431765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:05,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:05,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717607025] [2024-06-03 19:21:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:05,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:05,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:05,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 608 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:05,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:05,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:05,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:06,348 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-03 19:21:06,348 INFO L125 PetriNetUnfolderBase]: For 41497/41497 co-relation queries the response was YES. [2024-06-03 19:21:06,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14888 conditions, 2923 events. 1925/2923 cut-off events. For 41497/41497 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13756 event pairs, 683 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14851. Up to 2753 conditions per place. [2024-06-03 19:21:06,362 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-03 19:21:06,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 947 flow [2024-06-03 19:21:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:21:06,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:21:06,364 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 608 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:21:06,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 947 flow [2024-06-03 19:21:06,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 867 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:06,387 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 661 flow [2024-06-03 19:21:06,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-03 19:21:06,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-03 19:21:06,387 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 661 flow [2024-06-03 19:21:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:06,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:06,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:06,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:21:06,388 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:06,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1098649674, now seen corresponding path program 1 times [2024-06-03 19:21:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:06,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834312142] [2024-06-03 19:21:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:06,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834312142] [2024-06-03 19:21:06,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834312142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:06,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:06,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:06,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813620409] [2024-06-03 19:21:06,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:06,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:07,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:07,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:07,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:07,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:07,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:07,566 INFO L124 PetriNetUnfolderBase]: 1930/2914 cut-off events. [2024-06-03 19:21:07,566 INFO L125 PetriNetUnfolderBase]: For 46457/46475 co-relation queries the response was YES. [2024-06-03 19:21:07,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 2914 events. 1930/2914 cut-off events. For 46457/46475 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13604 event pairs, 720 based on Foata normal form. 7/2898 useless extension candidates. Maximal degree in co-relation 15206. Up to 2830 conditions per place. [2024-06-03 19:21:07,585 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 87 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-03 19:21:07,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 907 flow [2024-06-03 19:21:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:21:07,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 19:21:07,586 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 661 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:21:07,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 907 flow [2024-06-03 19:21:07,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 107 transitions, 847 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:07,613 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 659 flow [2024-06-03 19:21:07,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-06-03 19:21:07,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 19:21:07,614 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 659 flow [2024-06-03 19:21:07,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:07,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:07,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:07,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:21:07,614 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 19:21:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1789384519, now seen corresponding path program 1 times [2024-06-03 19:21:07,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:07,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103998290] [2024-06-03 19:21:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:08,652 INFO 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 19:21:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103998290] [2024-06-03 19:21:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103998290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018279411] [2024-06-03 19:21:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:08,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:08,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:08,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 659 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:08,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:08,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:08,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:09,479 INFO L124 PetriNetUnfolderBase]: 1986/3066 cut-off events. [2024-06-03 19:21:09,479 INFO L125 PetriNetUnfolderBase]: For 57492/57492 co-relation queries the response was YES. [2024-06-03 19:21:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16995 conditions, 3066 events. 1986/3066 cut-off events. For 57492/57492 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15610 event pairs, 509 based on Foata normal form. 16/3068 useless extension candidates. Maximal degree in co-relation 16956. Up to 2526 conditions per place. [2024-06-03 19:21:09,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-06-03 19:21:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1247 flow [2024-06-03 19:21:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-03 19:21:09,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-03 19:21:09,517 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 659 flow. Second operand 10 states and 201 transitions. [2024-06-03 19:21:09,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1247 flow [2024-06-03 19:21:09,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 151 transitions, 1211 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:09,545 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 739 flow [2024-06-03 19:21:09,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-03 19:21:09,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-03 19:21:09,546 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 739 flow [2024-06-03 19:21:09,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:09,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:09,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:21:09,547 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 19:21:09,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1671453659, now seen corresponding path program 2 times [2024-06-03 19:21:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:09,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482766913] [2024-06-03 19:21:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:09,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:10,757 INFO 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 19:21:10,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:10,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482766913] [2024-06-03 19:21:10,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482766913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:10,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:10,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:10,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754947582] [2024-06-03 19:21:10,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:10,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:10,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:10,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:10,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 739 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:10,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:10,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:10,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:11,823 INFO L124 PetriNetUnfolderBase]: 2015/3127 cut-off events. [2024-06-03 19:21:11,823 INFO L125 PetriNetUnfolderBase]: For 63758/63758 co-relation queries the response was YES. [2024-06-03 19:21:11,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3127 events. 2015/3127 cut-off events. For 63758/63758 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15992 event pairs, 613 based on Foata normal form. 36/3155 useless extension candidates. Maximal degree in co-relation 17275. Up to 2656 conditions per place. [2024-06-03 19:21:11,840 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-03 19:21:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1203 flow [2024-06-03 19:21:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 19:21:11,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 19:21:11,842 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 739 flow. Second operand 10 states and 196 transitions. [2024-06-03 19:21:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1203 flow [2024-06-03 19:21:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1159 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:11,873 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 788 flow [2024-06-03 19:21:11,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=788, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-03 19:21:11,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-03 19:21:11,874 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 788 flow [2024-06-03 19:21:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:11,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:11,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:21:11,874 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 19:21:11,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1789726037, now seen corresponding path program 1 times [2024-06-03 19:21:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127996567] [2024-06-03 19:21:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:11,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:12,956 INFO 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 19:21:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127996567] [2024-06-03 19:21:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127996567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177335617] [2024-06-03 19:21:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:13,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 788 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:13,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:13,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:13,679 INFO L124 PetriNetUnfolderBase]: 2180/3336 cut-off events. [2024-06-03 19:21:13,679 INFO L125 PetriNetUnfolderBase]: For 64971/64973 co-relation queries the response was YES. [2024-06-03 19:21:13,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18548 conditions, 3336 events. 2180/3336 cut-off events. For 64971/64973 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16332 event pairs, 662 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 18506. Up to 3098 conditions per place. [2024-06-03 19:21:13,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 103 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-03 19:21:13,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1181 flow [2024-06-03 19:21:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:21:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 19:21:13,709 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 788 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:21:13,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1181 flow [2024-06-03 19:21:13,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1130 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:13,742 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 861 flow [2024-06-03 19:21:13,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-03 19:21:13,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 19:21:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 861 flow [2024-06-03 19:21:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:13,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:13,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:21:13,743 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 19:21:13,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1789541339, now seen corresponding path program 3 times [2024-06-03 19:21:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847182470] [2024-06-03 19:21:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:14,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847182470] [2024-06-03 19:21:14,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847182470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:14,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948497101] [2024-06-03 19:21:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:14,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:14,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:15,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:15,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:15,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:15,736 INFO L124 PetriNetUnfolderBase]: 2129/3313 cut-off events. [2024-06-03 19:21:15,736 INFO L125 PetriNetUnfolderBase]: For 76214/76218 co-relation queries the response was YES. [2024-06-03 19:21:15,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19102 conditions, 3313 events. 2129/3313 cut-off events. For 76214/76218 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17341 event pairs, 624 based on Foata normal form. 24/3325 useless extension candidates. Maximal degree in co-relation 19058. Up to 2814 conditions per place. [2024-06-03 19:21:15,757 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2024-06-03 19:21:15,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 1305 flow [2024-06-03 19:21:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:21:15,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-03 19:21:15,759 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 861 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:21:15,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 1305 flow [2024-06-03 19:21:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1222 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:15,792 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 894 flow [2024-06-03 19:21:15,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=894, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-03 19:21:15,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 19:21:15,793 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 894 flow [2024-06-03 19:21:15,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:15,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:15,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:15,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:21:15,793 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:15,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -945553371, now seen corresponding path program 1 times [2024-06-03 19:21:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854359109] [2024-06-03 19:21:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:15,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:16,551 INFO 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 19:21:16,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:16,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854359109] [2024-06-03 19:21:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854359109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:16,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:16,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172314149] [2024-06-03 19:21:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:16,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:16,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:16,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:16,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:17,094 INFO L124 PetriNetUnfolderBase]: 2292/3510 cut-off events. [2024-06-03 19:21:17,095 INFO L125 PetriNetUnfolderBase]: For 80271/80289 co-relation queries the response was YES. [2024-06-03 19:21:17,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20430 conditions, 3510 events. 2292/3510 cut-off events. For 80271/80289 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17516 event pairs, 792 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 20385. Up to 3383 conditions per place. [2024-06-03 19:21:17,112 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2024-06-03 19:21:17,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 127 transitions, 1262 flow [2024-06-03 19:21:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 19:21:17,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:21:17,114 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 894 flow. Second operand 6 states and 110 transitions. [2024-06-03 19:21:17,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 127 transitions, 1262 flow [2024-06-03 19:21:17,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 1182 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:17,150 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 915 flow [2024-06-03 19:21:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-03 19:21:17,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-03 19:21:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 915 flow [2024-06-03 19:21:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:17,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:17,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:21:17,151 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 19:21:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 214424917, now seen corresponding path program 2 times [2024-06-03 19:21:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325714694] [2024-06-03 19:21:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:18,219 INFO 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 19:21:18,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:18,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325714694] [2024-06-03 19:21:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325714694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:18,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:18,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292444912] [2024-06-03 19:21:18,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:18,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 915 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:18,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:18,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:18,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:18,951 INFO L124 PetriNetUnfolderBase]: 2330/3573 cut-off events. [2024-06-03 19:21:18,951 INFO L125 PetriNetUnfolderBase]: For 85332/85342 co-relation queries the response was YES. [2024-06-03 19:21:18,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21039 conditions, 3573 events. 2330/3573 cut-off events. For 85332/85342 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17794 event pairs, 735 based on Foata normal form. 4/3571 useless extension candidates. Maximal degree in co-relation 20993. Up to 3374 conditions per place. [2024-06-03 19:21:18,974 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-03 19:21:18,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1320 flow [2024-06-03 19:21:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:21:18,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:21:18,975 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 915 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:21:18,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1320 flow [2024-06-03 19:21:19,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1292 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:19,033 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 1017 flow [2024-06-03 19:21:19,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2024-06-03 19:21:19,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-03 19:21:19,034 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 1017 flow [2024-06-03 19:21:19,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:19,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:19,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:21:19,034 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 19:21:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1505597255, now seen corresponding path program 4 times [2024-06-03 19:21:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037906218] [2024-06-03 19:21:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:20,170 INFO 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 19:21:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037906218] [2024-06-03 19:21:20,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037906218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:20,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:20,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595494822] [2024-06-03 19:21:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:20,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:21:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:21:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:21,062 INFO L124 PetriNetUnfolderBase]: 2252/3522 cut-off events. [2024-06-03 19:21:21,062 INFO L125 PetriNetUnfolderBase]: For 98832/98842 co-relation queries the response was YES. [2024-06-03 19:21:21,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21337 conditions, 3522 events. 2252/3522 cut-off events. For 98832/98842 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18471 event pairs, 640 based on Foata normal form. 28/3539 useless extension candidates. Maximal degree in co-relation 21288. Up to 3070 conditions per place. [2024-06-03 19:21:21,083 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-06-03 19:21:21,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1465 flow [2024-06-03 19:21:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:21:21,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:21:21,085 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 1017 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:21:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1465 flow [2024-06-03 19:21:21,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 153 transitions, 1378 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:21,153 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1028 flow [2024-06-03 19:21:21,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1028, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-03 19:21:21,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-03 19:21:21,153 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1028 flow [2024-06-03 19:21:21,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:21,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:21,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:21:21,154 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 19:21:21,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1541798159, now seen corresponding path program 3 times [2024-06-03 19:21:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:21,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913092885] [2024-06-03 19:21:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913092885] [2024-06-03 19:21:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913092885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:22,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273639517] [2024-06-03 19:21:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:22,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1028 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:23,040 INFO L124 PetriNetUnfolderBase]: 2406/3701 cut-off events. [2024-06-03 19:21:23,040 INFO L125 PetriNetUnfolderBase]: For 101153/101163 co-relation queries the response was YES. [2024-06-03 19:21:23,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22647 conditions, 3701 events. 2406/3701 cut-off events. For 101153/101163 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18702 event pairs, 749 based on Foata normal form. 4/3699 useless extension candidates. Maximal degree in co-relation 22597. Up to 3506 conditions per place. [2024-06-03 19:21:23,068 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-03 19:21:23,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 144 transitions, 1416 flow [2024-06-03 19:21:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:21:23,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:21:23,070 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1028 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:21:23,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 144 transitions, 1416 flow [2024-06-03 19:21:23,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:23,149 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1070 flow [2024-06-03 19:21:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-06-03 19:21:23,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-03 19:21:23,149 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1070 flow [2024-06-03 19:21:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:21:23,150 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:23,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1030125855, now seen corresponding path program 1 times [2024-06-03 19:21:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080319989] [2024-06-03 19:21:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:24,266 INFO 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 19:21:24,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080319989] [2024-06-03 19:21:24,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080319989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:24,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:24,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97852986] [2024-06-03 19:21:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:24,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:24,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:24,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 1070 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:24,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:24,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:24,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:25,124 INFO L124 PetriNetUnfolderBase]: 2416/3719 cut-off events. [2024-06-03 19:21:25,124 INFO L125 PetriNetUnfolderBase]: For 103392/103392 co-relation queries the response was YES. [2024-06-03 19:21:25,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22740 conditions, 3719 events. 2416/3719 cut-off events. For 103392/103392 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18829 event pairs, 724 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 22689. Up to 3511 conditions per place. [2024-06-03 19:21:25,145 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 27 changer transitions 0/151 dead transitions. [2024-06-03 19:21:25,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1523 flow [2024-06-03 19:21:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:21:25,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:21:25,147 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1070 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:21:25,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1523 flow [2024-06-03 19:21:25,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 1437 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:25,205 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1168 flow [2024-06-03 19:21:25,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-03 19:21:25,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 19:21:25,206 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1168 flow [2024-06-03 19:21:25,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:25,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:25,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:25,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:21:25,207 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 19:21:25,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash 450896947, now seen corresponding path program 4 times [2024-06-03 19:21:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:25,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090908790] [2024-06-03 19:21:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:26,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:26,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090908790] [2024-06-03 19:21:26,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090908790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:26,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:26,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536020754] [2024-06-03 19:21:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:26,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:26,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1168 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:26,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:26,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:26,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:27,003 INFO L124 PetriNetUnfolderBase]: 2408/3707 cut-off events. [2024-06-03 19:21:27,003 INFO L125 PetriNetUnfolderBase]: For 110060/110060 co-relation queries the response was YES. [2024-06-03 19:21:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23114 conditions, 3707 events. 2408/3707 cut-off events. For 110060/110060 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18697 event pairs, 726 based on Foata normal form. 4/3709 useless extension candidates. Maximal degree in co-relation 23061. Up to 3517 conditions per place. [2024-06-03 19:21:27,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 18 changer transitions 0/153 dead transitions. [2024-06-03 19:21:27,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 153 transitions, 1576 flow [2024-06-03 19:21:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:21:27,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 19:21:27,030 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1168 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:21:27,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 153 transitions, 1576 flow [2024-06-03 19:21:27,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 1474 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:27,096 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1169 flow [2024-06-03 19:21:27,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-03 19:21:27,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-03 19:21:27,097 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1169 flow [2024-06-03 19:21:27,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:27,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:27,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:21:27,098 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:27,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -945167421, now seen corresponding path program 2 times [2024-06-03 19:21:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211627066] [2024-06-03 19:21:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:27,686 INFO 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 19:21:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:27,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211627066] [2024-06-03 19:21:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211627066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:27,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:27,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145090982] [2024-06-03 19:21:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:27,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:27,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:27,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1169 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:27,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:27,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:27,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:28,343 INFO L124 PetriNetUnfolderBase]: 2378/3665 cut-off events. [2024-06-03 19:21:28,344 INFO L125 PetriNetUnfolderBase]: For 115198/115205 co-relation queries the response was YES. [2024-06-03 19:21:28,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23072 conditions, 3665 events. 2378/3665 cut-off events. For 115198/115205 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18627 event pairs, 777 based on Foata normal form. 4/3651 useless extension candidates. Maximal degree in co-relation 23018. Up to 3546 conditions per place. [2024-06-03 19:21:28,370 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 110 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-03 19:21:28,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1433 flow [2024-06-03 19:21:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 19:21:28,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-03 19:21:28,371 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1169 flow. Second operand 6 states and 101 transitions. [2024-06-03 19:21:28,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1433 flow [2024-06-03 19:21:28,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 1334 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:28,456 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1100 flow [2024-06-03 19:21:28,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1100, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-03 19:21:28,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-03 19:21:28,457 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1100 flow [2024-06-03 19:21:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:28,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:28,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:21:28,458 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -950875389, now seen corresponding path program 1 times [2024-06-03 19:21:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517904751] [2024-06-03 19:21:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517904751] [2024-06-03 19:21:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517904751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635208288] [2024-06-03 19:21:29,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:29,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:29,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1100 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 19:21:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:29,766 INFO L124 PetriNetUnfolderBase]: 2529/3828 cut-off events. [2024-06-03 19:21:29,766 INFO L125 PetriNetUnfolderBase]: For 119339/119339 co-relation queries the response was YES. [2024-06-03 19:21:29,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23993 conditions, 3828 events. 2529/3828 cut-off events. For 119339/119339 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18803 event pairs, 792 based on Foata normal form. 1/3827 useless extension candidates. Maximal degree in co-relation 23938. Up to 3796 conditions per place. [2024-06-03 19:21:29,792 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-03 19:21:29,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 147 transitions, 1528 flow [2024-06-03 19:21:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:21:29,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:21:29,794 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1100 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:21:29,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 147 transitions, 1528 flow [2024-06-03 19:21:29,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1491 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:29,892 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 1161 flow [2024-06-03 19:21:29,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2024-06-03 19:21:29,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 19:21:29,893 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 1161 flow [2024-06-03 19:21:29,893 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 19:21:29,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:29,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:21:29,894 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:29,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 342703461, now seen corresponding path program 2 times [2024-06-03 19:21:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:29,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476247392] [2024-06-03 19:21:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:30,485 INFO 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 19:21:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476247392] [2024-06-03 19:21:30,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476247392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:30,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455760973] [2024-06-03 19:21:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:30,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:30,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:30,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 1161 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 19:21:30,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:30,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:30,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:31,190 INFO L124 PetriNetUnfolderBase]: 2526/3825 cut-off events. [2024-06-03 19:21:31,190 INFO L125 PetriNetUnfolderBase]: For 126543/126545 co-relation queries the response was YES. [2024-06-03 19:21:31,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3825 events. 2526/3825 cut-off events. For 126543/126545 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18832 event pairs, 795 based on Foata normal form. 3/3826 useless extension candidates. Maximal degree in co-relation 24483. Up to 3793 conditions per place. [2024-06-03 19:21:31,215 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-06-03 19:21:31,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1461 flow [2024-06-03 19:21:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 19:21:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 19:21:31,216 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 1161 flow. Second operand 6 states and 98 transitions. [2024-06-03 19:21:31,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1461 flow [2024-06-03 19:21:31,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 143 transitions, 1414 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:31,290 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1154 flow [2024-06-03 19:21:31,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1154, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-03 19:21:31,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 19:21:31,291 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1154 flow [2024-06-03 19:21:31,291 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 19:21:31,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:31,291 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 19:21:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:21:31,291 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 19:21:31,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash -353066701, now seen corresponding path program 1 times [2024-06-03 19:21:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:31,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891378630] [2024-06-03 19:21:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:32,205 INFO 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 19:21:32,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:32,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891378630] [2024-06-03 19:21:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891378630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:32,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:32,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210548390] [2024-06-03 19:21:32,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:32,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:32,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:32,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1154 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:32,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:32,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:32,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:33,029 INFO L124 PetriNetUnfolderBase]: 2440/3749 cut-off events. [2024-06-03 19:21:33,029 INFO L125 PetriNetUnfolderBase]: For 136615/136617 co-relation queries the response was YES. [2024-06-03 19:21:33,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24299 conditions, 3749 events. 2440/3749 cut-off events. For 136615/136617 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18971 event pairs, 638 based on Foata normal form. 4/3743 useless extension candidates. Maximal degree in co-relation 24241. Up to 3310 conditions per place. [2024-06-03 19:21:33,055 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 48 changer transitions 0/179 dead transitions. [2024-06-03 19:21:33,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 179 transitions, 1744 flow [2024-06-03 19:21:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:21:33,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 19:21:33,057 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1154 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:21:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 179 transitions, 1744 flow [2024-06-03 19:21:33,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1698 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:33,154 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1392 flow [2024-06-03 19:21:33,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-06-03 19:21:33,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-03 19:21:33,155 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1392 flow [2024-06-03 19:21:33,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:33,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:33,155 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 19:21:33,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:21:33,156 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 19:21:33,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash 410319293, now seen corresponding path program 1 times [2024-06-03 19:21:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668396651] [2024-06-03 19:21:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668396651] [2024-06-03 19:21:33,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668396651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:33,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:33,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746410586] [2024-06-03 19:21:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:33,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:33,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:33,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1392 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:33,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:33,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:33,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:34,319 INFO L124 PetriNetUnfolderBase]: 2426/3737 cut-off events. [2024-06-03 19:21:34,319 INFO L125 PetriNetUnfolderBase]: For 149947/149978 co-relation queries the response was YES. [2024-06-03 19:21:34,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25241 conditions, 3737 events. 2426/3737 cut-off events. For 149947/149978 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19041 event pairs, 737 based on Foata normal form. 8/3717 useless extension candidates. Maximal degree in co-relation 25181. Up to 3549 conditions per place. [2024-06-03 19:21:34,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 26 changer transitions 0/174 dead transitions. [2024-06-03 19:21:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 174 transitions, 1902 flow [2024-06-03 19:21:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:21:34,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 19:21:34,350 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1392 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:21:34,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 174 transitions, 1902 flow [2024-06-03 19:21:34,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 1759 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:34,480 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1406 flow [2024-06-03 19:21:34,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2024-06-03 19:21:34,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-03 19:21:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1406 flow [2024-06-03 19:21:34,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:34,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:34,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:34,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:21:34,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:34,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1083707699, now seen corresponding path program 2 times [2024-06-03 19:21:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:34,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034897426] [2024-06-03 19:21:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:35,628 INFO 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 19:21:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034897426] [2024-06-03 19:21:35,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034897426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:35,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440226680] [2024-06-03 19:21:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:35,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:35,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:35,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 1406 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:35,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:35,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:35,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:36,476 INFO L124 PetriNetUnfolderBase]: 2554/3920 cut-off events. [2024-06-03 19:21:36,476 INFO L125 PetriNetUnfolderBase]: For 159173/159173 co-relation queries the response was YES. [2024-06-03 19:21:36,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26831 conditions, 3920 events. 2554/3920 cut-off events. For 159173/159173 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19926 event pairs, 746 based on Foata normal form. 4/3922 useless extension candidates. Maximal degree in co-relation 26768. Up to 3625 conditions per place. [2024-06-03 19:21:36,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-06-03 19:21:36,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 2116 flow [2024-06-03 19:21:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:21:36,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:21:36,512 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1406 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:21:36,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 2116 flow [2024-06-03 19:21:36,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2077 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:36,642 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1603 flow [2024-06-03 19:21:36,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-03 19:21:36,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 19:21:36,643 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1603 flow [2024-06-03 19:21:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:36,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:36,643 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 19:21:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:21:36,643 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:36,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash 576851989, now seen corresponding path program 3 times [2024-06-03 19:21:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:36,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280219820] [2024-06-03 19:21:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:37,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:37,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280219820] [2024-06-03 19:21:37,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280219820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:37,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:37,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607957149] [2024-06-03 19:21:37,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:37,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:37,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1603 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:37,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:37,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:37,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:38,645 INFO L124 PetriNetUnfolderBase]: 2571/3947 cut-off events. [2024-06-03 19:21:38,645 INFO L125 PetriNetUnfolderBase]: For 169892/169892 co-relation queries the response was YES. [2024-06-03 19:21:38,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27548 conditions, 3947 events. 2571/3947 cut-off events. For 169892/169892 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20082 event pairs, 741 based on Foata normal form. 4/3949 useless extension candidates. Maximal degree in co-relation 27481. Up to 3644 conditions per place. [2024-06-03 19:21:38,671 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 32 changer transitions 0/196 dead transitions. [2024-06-03 19:21:38,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2193 flow [2024-06-03 19:21:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:21:38,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:21:38,672 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1603 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:21:38,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2193 flow [2024-06-03 19:21:38,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2082 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:38,772 INFO L231 Difference]: Finished difference. Result has 148 places, 166 transitions, 1727 flow [2024-06-03 19:21:38,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1727, PETRI_PLACES=148, PETRI_TRANSITIONS=166} [2024-06-03 19:21:38,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-03 19:21:38,773 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 166 transitions, 1727 flow [2024-06-03 19:21:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:38,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:38,773 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 19:21:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:21:38,773 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 19:21:38,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash 551096233, now seen corresponding path program 4 times [2024-06-03 19:21:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165211405] [2024-06-03 19:21:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:39,948 INFO 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 19:21:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:39,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165211405] [2024-06-03 19:21:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165211405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:39,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:39,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96829502] [2024-06-03 19:21:39,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:40,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:40,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 166 transitions, 1727 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:40,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:40,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:40,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:40,945 INFO L124 PetriNetUnfolderBase]: 2563/3935 cut-off events. [2024-06-03 19:21:40,946 INFO L125 PetriNetUnfolderBase]: For 176512/176512 co-relation queries the response was YES. [2024-06-03 19:21:40,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 3935 events. 2563/3935 cut-off events. For 176512/176512 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20039 event pairs, 739 based on Foata normal form. 4/3937 useless extension candidates. Maximal degree in co-relation 27772. Up to 3692 conditions per place. [2024-06-03 19:21:40,980 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-03 19:21:40,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2175 flow [2024-06-03 19:21:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:40,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:21:40,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 19:21:40,982 INFO L175 Difference]: Start difference. First operand has 148 places, 166 transitions, 1727 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:21:40,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2175 flow [2024-06-03 19:21:41,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 1994 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:41,156 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1613 flow [2024-06-03 19:21:41,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1613, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-03 19:21:41,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 19:21:41,157 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1613 flow [2024-06-03 19:21:41,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:41,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:41,157 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 19:21:41,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:21:41,158 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 19:21:41,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1083700042, now seen corresponding path program 1 times [2024-06-03 19:21:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:41,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342935270] [2024-06-03 19:21:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:42,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342935270] [2024-06-03 19:21:42,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342935270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:42,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:42,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:42,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481305114] [2024-06-03 19:21:42,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:42,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:42,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:42,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:42,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1613 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:42,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:42,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:42,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:43,698 INFO L124 PetriNetUnfolderBase]: 2580/3960 cut-off events. [2024-06-03 19:21:43,698 INFO L125 PetriNetUnfolderBase]: For 179194/179194 co-relation queries the response was YES. [2024-06-03 19:21:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27566 conditions, 3960 events. 2580/3960 cut-off events. For 179194/179194 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20148 event pairs, 737 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 27493. Up to 3721 conditions per place. [2024-06-03 19:21:43,731 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-03 19:21:43,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 201 transitions, 2173 flow [2024-06-03 19:21:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:21:43,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:21:43,732 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1613 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:21:43,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 201 transitions, 2173 flow [2024-06-03 19:21:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 201 transitions, 2107 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:43,846 INFO L231 Difference]: Finished difference. Result has 155 places, 172 transitions, 1733 flow [2024-06-03 19:21:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=155, PETRI_TRANSITIONS=172} [2024-06-03 19:21:43,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-03 19:21:43,847 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 172 transitions, 1733 flow [2024-06-03 19:21:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:43,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:43,847 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 19:21:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:21:43,848 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 19:21:43,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1741412445, now seen corresponding path program 5 times [2024-06-03 19:21:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:43,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784671680] [2024-06-03 19:21:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:44,955 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 19:21:44,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784671680] [2024-06-03 19:21:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784671680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:44,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:21:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895261517] [2024-06-03 19:21:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:21:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:21:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:21:45,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:45,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 172 transitions, 1733 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:45,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:45,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:45,877 INFO L124 PetriNetUnfolderBase]: 2572/3948 cut-off events. [2024-06-03 19:21:45,877 INFO L125 PetriNetUnfolderBase]: For 187938/187938 co-relation queries the response was YES. [2024-06-03 19:21:45,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 3948 events. 2572/3948 cut-off events. For 187938/187938 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20014 event pairs, 709 based on Foata normal form. 4/3950 useless extension candidates. Maximal degree in co-relation 27832. Up to 3736 conditions per place. [2024-06-03 19:21:45,914 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2024-06-03 19:21:45,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 2267 flow [2024-06-03 19:21:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:21:45,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:21:45,917 INFO L175 Difference]: Start difference. First operand has 155 places, 172 transitions, 1733 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:21:45,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 2267 flow [2024-06-03 19:21:46,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 203 transitions, 2141 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:46,095 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1732 flow [2024-06-03 19:21:46,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2024-06-03 19:21:46,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-03 19:21:46,095 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1732 flow [2024-06-03 19:21:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:46,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:46,096 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 19:21:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:21:46,096 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 19:21:46,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 759646229, now seen corresponding path program 2 times [2024-06-03 19:21:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100844160] [2024-06-03 19:21:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:46,784 INFO 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 19:21:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100844160] [2024-06-03 19:21:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100844160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:46,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:46,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377223865] [2024-06-03 19:21:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:46,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:46,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:46,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:46,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1732 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:46,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:46,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:46,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:47,480 INFO L124 PetriNetUnfolderBase]: 2488/3839 cut-off events. [2024-06-03 19:21:47,480 INFO L125 PetriNetUnfolderBase]: For 198878/198933 co-relation queries the response was YES. [2024-06-03 19:21:47,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27545 conditions, 3839 events. 2488/3839 cut-off events. For 198878/198933 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19717 event pairs, 745 based on Foata normal form. 6/3811 useless extension candidates. Maximal degree in co-relation 27470. Up to 3704 conditions per place. [2024-06-03 19:21:47,513 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2024-06-03 19:21:47,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 188 transitions, 2146 flow [2024-06-03 19:21:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:21:47,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:21:47,514 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1732 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:21:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 188 transitions, 2146 flow [2024-06-03 19:21:47,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 188 transitions, 2039 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:47,674 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1707 flow [2024-06-03 19:21:47,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1707, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-03 19:21:47,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-03 19:21:47,676 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1707 flow [2024-06-03 19:21:47,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:47,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:47,676 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 19:21:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:21:47,677 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:47,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 764582333, now seen corresponding path program 3 times [2024-06-03 19:21:47,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100585779] [2024-06-03 19:21:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:48,454 INFO 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 19:21:48,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100585779] [2024-06-03 19:21:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100585779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:48,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:48,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:48,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792943202] [2024-06-03 19:21:48,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:48,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:48,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:48,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:21:48,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1707 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:48,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:48,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:21:48,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:49,239 INFO L124 PetriNetUnfolderBase]: 2476/3821 cut-off events. [2024-06-03 19:21:49,240 INFO L125 PetriNetUnfolderBase]: For 201382/201421 co-relation queries the response was YES. [2024-06-03 19:21:49,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27231 conditions, 3821 events. 2476/3821 cut-off events. For 201382/201421 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19606 event pairs, 735 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 27155. Up to 3677 conditions per place. [2024-06-03 19:21:49,274 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-03 19:21:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 190 transitions, 2091 flow [2024-06-03 19:21:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:21:49,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:21:49,276 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1707 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:21:49,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 190 transitions, 2091 flow [2024-06-03 19:21:49,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 190 transitions, 2016 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:49,424 INFO L231 Difference]: Finished difference. Result has 159 places, 177 transitions, 1678 flow [2024-06-03 19:21:49,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1678, PETRI_PLACES=159, PETRI_TRANSITIONS=177} [2024-06-03 19:21:49,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 19:21:49,424 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 177 transitions, 1678 flow [2024-06-03 19:21:49,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:49,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:49,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:49,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:21:49,425 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:49,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:49,425 INFO L85 PathProgramCache]: Analyzing trace with hash 794878945, now seen corresponding path program 1 times [2024-06-03 19:21:49,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970096629] [2024-06-03 19:21:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970096629] [2024-06-03 19:21:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970096629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:50,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521120806] [2024-06-03 19:21:50,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:50,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:50,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 177 transitions, 1678 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 19:21:50,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:50,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:50,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:51,010 INFO L124 PetriNetUnfolderBase]: 2704/4090 cut-off events. [2024-06-03 19:21:51,011 INFO L125 PetriNetUnfolderBase]: For 206872/206872 co-relation queries the response was YES. [2024-06-03 19:21:51,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 4090 events. 2704/4090 cut-off events. For 206872/206872 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20377 event pairs, 771 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 28752. Up to 4042 conditions per place. [2024-06-03 19:21:51,046 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-03 19:21:51,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2150 flow [2024-06-03 19:21:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:21:51,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:21:51,047 INFO L175 Difference]: Start difference. First operand has 159 places, 177 transitions, 1678 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:21:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2150 flow [2024-06-03 19:21:51,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 2079 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:51,249 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1698 flow [2024-06-03 19:21:51,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-03 19:21:51,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-03 19:21:51,250 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1698 flow [2024-06-03 19:21:51,250 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 19:21:51,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:51,250 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 19:21:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:21:51,251 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:51,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1833505325, now seen corresponding path program 2 times [2024-06-03 19:21:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111234892] [2024-06-03 19:21:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:51,939 INFO 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 19:21:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111234892] [2024-06-03 19:21:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111234892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387463168] [2024-06-03 19:21:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:52,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:52,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1698 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 19:21:52,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:52,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:52,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:52,857 INFO L124 PetriNetUnfolderBase]: 2714/4104 cut-off events. [2024-06-03 19:21:52,858 INFO L125 PetriNetUnfolderBase]: For 216088/216088 co-relation queries the response was YES. [2024-06-03 19:21:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29400 conditions, 4104 events. 2714/4104 cut-off events. For 216088/216088 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20442 event pairs, 782 based on Foata normal form. 2/4104 useless extension candidates. Maximal degree in co-relation 29323. Up to 4032 conditions per place. [2024-06-03 19:21:52,890 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-03 19:21:52,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 202 transitions, 2322 flow [2024-06-03 19:21:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 19:21:52,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:21:52,891 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1698 flow. Second operand 7 states and 119 transitions. [2024-06-03 19:21:52,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 202 transitions, 2322 flow [2024-06-03 19:21:53,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 202 transitions, 2255 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:53,094 INFO L231 Difference]: Finished difference. Result has 162 places, 186 transitions, 1801 flow [2024-06-03 19:21:53,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=162, PETRI_TRANSITIONS=186} [2024-06-03 19:21:53,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-03 19:21:53,097 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 186 transitions, 1801 flow [2024-06-03 19:21:53,098 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 19:21:53,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:53,100 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 19:21:53,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:21:53,100 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:53,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash 794999101, now seen corresponding path program 1 times [2024-06-03 19:21:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:53,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226015050] [2024-06-03 19:21:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:53,775 INFO 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 19:21:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:53,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226015050] [2024-06-03 19:21:53,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226015050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:53,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780771432] [2024-06-03 19:21:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:53,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:53,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 186 transitions, 1801 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 19:21:53,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:53,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:53,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:54,774 INFO L124 PetriNetUnfolderBase]: 2729/4125 cut-off events. [2024-06-03 19:21:54,775 INFO L125 PetriNetUnfolderBase]: For 228252/228252 co-relation queries the response was YES. [2024-06-03 19:21:54,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 4125 events. 2729/4125 cut-off events. For 228252/228252 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20545 event pairs, 778 based on Foata normal form. 3/4126 useless extension candidates. Maximal degree in co-relation 29980. Up to 4056 conditions per place. [2024-06-03 19:21:54,806 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2024-06-03 19:21:54,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 210 transitions, 2409 flow [2024-06-03 19:21:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:21:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 19:21:54,807 INFO L175 Difference]: Start difference. First operand has 162 places, 186 transitions, 1801 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:21:54,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 210 transitions, 2409 flow [2024-06-03 19:21:54,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2343 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:54,991 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 1863 flow [2024-06-03 19:21:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1863, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-03 19:21:54,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 19:21:54,992 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 1863 flow [2024-06-03 19:21:54,992 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 19:21:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:54,993 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 19:21:54,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:21:54,993 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:54,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2087505475, now seen corresponding path program 3 times [2024-06-03 19:21:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166887826] [2024-06-03 19:21:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:55,611 INFO 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 19:21:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166887826] [2024-06-03 19:21:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166887826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761898834] [2024-06-03 19:21:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:55,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:55,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 1863 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 19:21:55,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:55,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:55,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:56,446 INFO L124 PetriNetUnfolderBase]: 2723/4118 cut-off events. [2024-06-03 19:21:56,446 INFO L125 PetriNetUnfolderBase]: For 235704/235706 co-relation queries the response was YES. [2024-06-03 19:21:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30495 conditions, 4118 events. 2723/4118 cut-off events. For 235704/235706 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20532 event pairs, 782 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 30415. Up to 4048 conditions per place. [2024-06-03 19:21:56,484 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-03 19:21:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 203 transitions, 2293 flow [2024-06-03 19:21:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:21:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-03 19:21:56,485 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 1863 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:21:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 203 transitions, 2293 flow [2024-06-03 19:21:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 203 transitions, 2216 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:56,701 INFO L231 Difference]: Finished difference. Result has 170 places, 192 transitions, 1850 flow [2024-06-03 19:21:56,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1850, PETRI_PLACES=170, PETRI_TRANSITIONS=192} [2024-06-03 19:21:56,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-03 19:21:56,702 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 192 transitions, 1850 flow [2024-06-03 19:21:56,702 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 19:21:56,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:56,703 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 19:21:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:21:56,703 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 759652181, now seen corresponding path program 2 times [2024-06-03 19:21:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:56,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362539035] [2024-06-03 19:21:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:57,401 INFO 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 19:21:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362539035] [2024-06-03 19:21:57,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362539035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:57,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:57,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:57,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840124008] [2024-06-03 19:21:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:57,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:57,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 192 transitions, 1850 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 19:21:57,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:57,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:57,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:58,260 INFO L124 PetriNetUnfolderBase]: 2738/4139 cut-off events. [2024-06-03 19:21:58,261 INFO L125 PetriNetUnfolderBase]: For 245297/245299 co-relation queries the response was YES. [2024-06-03 19:21:58,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30781 conditions, 4139 events. 2738/4139 cut-off events. For 245297/245299 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20706 event pairs, 767 based on Foata normal form. 5/4142 useless extension candidates. Maximal degree in co-relation 30699. Up to 4062 conditions per place. [2024-06-03 19:21:58,299 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-03 19:21:58,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 209 transitions, 2418 flow [2024-06-03 19:21:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:21:58,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:21:58,301 INFO L175 Difference]: Start difference. First operand has 170 places, 192 transitions, 1850 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:21:58,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 209 transitions, 2418 flow [2024-06-03 19:21:58,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 209 transitions, 2338 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:58,485 INFO L231 Difference]: Finished difference. Result has 171 places, 195 transitions, 1869 flow [2024-06-03 19:21:58,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1869, PETRI_PLACES=171, PETRI_TRANSITIONS=195} [2024-06-03 19:21:58,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-03 19:21:58,486 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 195 transitions, 1869 flow [2024-06-03 19:21:58,486 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 19:21:58,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:58,486 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 19:21:58,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:21:58,486 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:21:58,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash 759415031, now seen corresponding path program 3 times [2024-06-03 19:21:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:58,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310557853] [2024-06-03 19:21:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310557853] [2024-06-03 19:21:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310557853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:21:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140645116] [2024-06-03 19:21:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:21:59,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:21:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:21:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:21:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 195 transitions, 1869 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 19:21:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:21:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:00,003 INFO L124 PetriNetUnfolderBase]: 2729/4127 cut-off events. [2024-06-03 19:22:00,004 INFO L125 PetriNetUnfolderBase]: For 251658/251660 co-relation queries the response was YES. [2024-06-03 19:22:00,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30803 conditions, 4127 events. 2729/4127 cut-off events. For 251658/251660 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20649 event pairs, 775 based on Foata normal form. 5/4130 useless extension candidates. Maximal degree in co-relation 30720. Up to 4055 conditions per place. [2024-06-03 19:22:00,044 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 178 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2024-06-03 19:22:00,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2323 flow [2024-06-03 19:22:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:22:00,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-03 19:22:00,046 INFO L175 Difference]: Start difference. First operand has 171 places, 195 transitions, 1869 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:22:00,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2323 flow [2024-06-03 19:22:00,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2242 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:00,224 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 1852 flow [2024-06-03 19:22:00,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1852, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-03 19:22:00,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-03 19:22:00,225 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 1852 flow [2024-06-03 19:22:00,225 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 19:22:00,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:00,225 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 19:22:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:22:00,225 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 19:22:00,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -165340796, now seen corresponding path program 1 times [2024-06-03 19:22:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919610890] [2024-06-03 19:22:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:01,233 INFO 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 19:22:01,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:01,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919610890] [2024-06-03 19:22:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919610890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:01,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767248425] [2024-06-03 19:22:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:01,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:01,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 1852 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 19:22:01,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:01,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:01,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:02,099 INFO L124 PetriNetUnfolderBase]: 2739/4140 cut-off events. [2024-06-03 19:22:02,099 INFO L125 PetriNetUnfolderBase]: For 258709/258709 co-relation queries the response was YES. [2024-06-03 19:22:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31007 conditions, 4140 events. 2739/4140 cut-off events. For 258709/258709 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20690 event pairs, 763 based on Foata normal form. 1/4139 useless extension candidates. Maximal degree in co-relation 30923. Up to 4053 conditions per place. [2024-06-03 19:22:02,140 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 36 changer transitions 0/239 dead transitions. [2024-06-03 19:22:02,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 239 transitions, 2641 flow [2024-06-03 19:22:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:22:02,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 19:22:02,141 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 1852 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:22:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 239 transitions, 2641 flow [2024-06-03 19:22:02,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 239 transitions, 2558 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:02,339 INFO L231 Difference]: Finished difference. Result has 177 places, 209 transitions, 2009 flow [2024-06-03 19:22:02,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2009, PETRI_PLACES=177, PETRI_TRANSITIONS=209} [2024-06-03 19:22:02,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-03 19:22:02,340 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 209 transitions, 2009 flow [2024-06-03 19:22:02,340 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 19:22:02,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:02,340 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 19:22:02,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:22:02,340 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:02,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash -170724318, now seen corresponding path program 1 times [2024-06-03 19:22:02,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:02,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530255273] [2024-06-03 19:22:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:02,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530255273] [2024-06-03 19:22:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530255273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705071902] [2024-06-03 19:22:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 209 transitions, 2009 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 19:22:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:03,789 INFO L124 PetriNetUnfolderBase]: 2752/4159 cut-off events. [2024-06-03 19:22:03,789 INFO L125 PetriNetUnfolderBase]: For 271917/271919 co-relation queries the response was YES. [2024-06-03 19:22:03,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31864 conditions, 4159 events. 2752/4159 cut-off events. For 271917/271919 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20822 event pairs, 768 based on Foata normal form. 3/4160 useless extension candidates. Maximal degree in co-relation 31778. Up to 4071 conditions per place. [2024-06-03 19:22:03,828 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-03 19:22:03,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 238 transitions, 2839 flow [2024-06-03 19:22:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:22:03,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:22:03,829 INFO L175 Difference]: Start difference. First operand has 177 places, 209 transitions, 2009 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:22:03,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 238 transitions, 2839 flow [2024-06-03 19:22:04,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 2774 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:04,112 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2146 flow [2024-06-03 19:22:04,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-03 19:22:04,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-03 19:22:04,112 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2146 flow [2024-06-03 19:22:04,112 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 19:22:04,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:04,113 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 19:22:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:22:04,113 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:04,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash -165010398, now seen corresponding path program 2 times [2024-06-03 19:22:04,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644634740] [2024-06-03 19:22:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644634740] [2024-06-03 19:22:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644634740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:04,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:04,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718447986] [2024-06-03 19:22:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:04,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:04,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:04,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2146 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 19:22:04,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:04,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:04,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:05,602 INFO L124 PetriNetUnfolderBase]: 2765/4177 cut-off events. [2024-06-03 19:22:05,603 INFO L125 PetriNetUnfolderBase]: For 285025/285027 co-relation queries the response was YES. [2024-06-03 19:22:05,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32655 conditions, 4177 events. 2765/4177 cut-off events. For 285025/285027 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20902 event pairs, 773 based on Foata normal form. 3/4178 useless extension candidates. Maximal degree in co-relation 32567. Up to 4086 conditions per place. [2024-06-03 19:22:05,645 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 42 changer transitions 0/242 dead transitions. [2024-06-03 19:22:05,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 242 transitions, 2961 flow [2024-06-03 19:22:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:22:05,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 19:22:05,647 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2146 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:22:05,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 242 transitions, 2961 flow [2024-06-03 19:22:05,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 242 transitions, 2858 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:05,997 INFO L231 Difference]: Finished difference. Result has 187 places, 225 transitions, 2234 flow [2024-06-03 19:22:05,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2234, PETRI_PLACES=187, PETRI_TRANSITIONS=225} [2024-06-03 19:22:05,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-03 19:22:05,998 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 225 transitions, 2234 flow [2024-06-03 19:22:05,998 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 19:22:05,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:05,998 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 19:22:05,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:22:05,998 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 19:22:05,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:05,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1939835188, now seen corresponding path program 1 times [2024-06-03 19:22:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411660380] [2024-06-03 19:22:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:07,377 INFO 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 19:22:07,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411660380] [2024-06-03 19:22:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411660380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:07,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:07,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443123642] [2024-06-03 19:22:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:07,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:07,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 225 transitions, 2234 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:07,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:07,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:07,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:08,476 INFO L124 PetriNetUnfolderBase]: 2735/4177 cut-off events. [2024-06-03 19:22:08,476 INFO L125 PetriNetUnfolderBase]: For 311404/311406 co-relation queries the response was YES. [2024-06-03 19:22:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33133 conditions, 4177 events. 2735/4177 cut-off events. For 311404/311406 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21362 event pairs, 678 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 33043. Up to 3624 conditions per place. [2024-06-03 19:22:08,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 58 changer transitions 0/266 dead transitions. [2024-06-03 19:22:08,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 266 transitions, 2894 flow [2024-06-03 19:22:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:22:08,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 19:22:08,525 INFO L175 Difference]: Start difference. First operand has 187 places, 225 transitions, 2234 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:22:08,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 266 transitions, 2894 flow [2024-06-03 19:22:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 266 transitions, 2824 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:08,821 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2344 flow [2024-06-03 19:22:08,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2344, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-03 19:22:08,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 19:22:08,825 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2344 flow [2024-06-03 19:22:08,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:08,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:08,825 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 19:22:08,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:22:08,826 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:08,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -165014366, now seen corresponding path program 2 times [2024-06-03 19:22:08,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:08,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485324393] [2024-06-03 19:22:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:08,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:09,739 INFO 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 19:22:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:09,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485324393] [2024-06-03 19:22:09,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485324393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:09,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:09,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:09,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071362840] [2024-06-03 19:22:09,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:09,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:09,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:09,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2344 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 19:22:09,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:09,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:09,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:10,552 INFO L124 PetriNetUnfolderBase]: 2811/4254 cut-off events. [2024-06-03 19:22:10,552 INFO L125 PetriNetUnfolderBase]: For 310181/310181 co-relation queries the response was YES. [2024-06-03 19:22:10,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 4254 events. 2811/4254 cut-off events. For 310181/310181 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21473 event pairs, 777 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 33692. Up to 4190 conditions per place. [2024-06-03 19:22:10,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-06-03 19:22:10,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 245 transitions, 2908 flow [2024-06-03 19:22:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:22:10,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:22:10,597 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2344 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:22:10,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 245 transitions, 2908 flow [2024-06-03 19:22:10,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 245 transitions, 2750 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:10,910 INFO L231 Difference]: Finished difference. Result has 194 places, 229 transitions, 2296 flow [2024-06-03 19:22:10,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2296, PETRI_PLACES=194, PETRI_TRANSITIONS=229} [2024-06-03 19:22:10,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 19:22:10,910 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 229 transitions, 2296 flow [2024-06-03 19:22:10,911 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 19:22:10,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:10,911 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 19:22:10,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:22:10,911 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:10,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1025385506, now seen corresponding path program 3 times [2024-06-03 19:22:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:10,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493394428] [2024-06-03 19:22:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:10,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:11,572 INFO 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 19:22:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493394428] [2024-06-03 19:22:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493394428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:11,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:11,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273768272] [2024-06-03 19:22:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:11,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:11,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 229 transitions, 2296 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 19:22:11,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:11,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:11,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:12,369 INFO L124 PetriNetUnfolderBase]: 2808/4250 cut-off events. [2024-06-03 19:22:12,369 INFO L125 PetriNetUnfolderBase]: For 314200/314200 co-relation queries the response was YES. [2024-06-03 19:22:12,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33472 conditions, 4250 events. 2808/4250 cut-off events. For 314200/314200 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21476 event pairs, 776 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 33380. Up to 4201 conditions per place. [2024-06-03 19:22:12,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-03 19:22:12,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 245 transitions, 2922 flow [2024-06-03 19:22:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:22:12,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-03 19:22:12,417 INFO L175 Difference]: Start difference. First operand has 194 places, 229 transitions, 2296 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:22:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 245 transitions, 2922 flow [2024-06-03 19:22:12,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 245 transitions, 2828 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:12,755 INFO L231 Difference]: Finished difference. Result has 196 places, 229 transitions, 2258 flow [2024-06-03 19:22:12,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=196, PETRI_TRANSITIONS=229} [2024-06-03 19:22:12,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-03 19:22:12,756 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 229 transitions, 2258 flow [2024-06-03 19:22:12,757 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 19:22:12,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:12,757 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 19:22:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:22:12,757 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:12,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1036813346, now seen corresponding path program 4 times [2024-06-03 19:22:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224949840] [2024-06-03 19:22:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:13,356 INFO 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 19:22:13,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224949840] [2024-06-03 19:22:13,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224949840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:13,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:13,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598842623] [2024-06-03 19:22:13,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:13,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:13,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:13,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:13,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 229 transitions, 2258 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 19:22:13,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:13,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:13,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:14,191 INFO L124 PetriNetUnfolderBase]: 2813/4257 cut-off events. [2024-06-03 19:22:14,191 INFO L125 PetriNetUnfolderBase]: For 325832/325832 co-relation queries the response was YES. [2024-06-03 19:22:14,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33697 conditions, 4257 events. 2813/4257 cut-off events. For 325832/325832 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21473 event pairs, 787 based on Foata normal form. 1/4256 useless extension candidates. Maximal degree in co-relation 33604. Up to 4223 conditions per place. [2024-06-03 19:22:14,234 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 221 selfloop transitions, 20 changer transitions 0/244 dead transitions. [2024-06-03 19:22:14,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 244 transitions, 2815 flow [2024-06-03 19:22:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:22:14,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-03 19:22:14,235 INFO L175 Difference]: Start difference. First operand has 196 places, 229 transitions, 2258 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:22:14,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 244 transitions, 2815 flow [2024-06-03 19:22:14,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 244 transitions, 2721 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:14,631 INFO L231 Difference]: Finished difference. Result has 197 places, 232 transitions, 2261 flow [2024-06-03 19:22:14,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2261, PETRI_PLACES=197, PETRI_TRANSITIONS=232} [2024-06-03 19:22:14,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 19:22:14,632 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 232 transitions, 2261 flow [2024-06-03 19:22:14,632 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 19:22:14,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:14,632 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 19:22:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:22:14,632 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 19:22:14,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1380141564, now seen corresponding path program 5 times [2024-06-03 19:22:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028934698] [2024-06-03 19:22:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:15,251 INFO 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 19:22:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028934698] [2024-06-03 19:22:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028934698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:15,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:15,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446114426] [2024-06-03 19:22:15,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:15,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:15,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 232 transitions, 2261 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 19:22:15,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:15,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:15,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:16,032 INFO L124 PetriNetUnfolderBase]: 2810/4254 cut-off events. [2024-06-03 19:22:16,033 INFO L125 PetriNetUnfolderBase]: For 335508/335510 co-relation queries the response was YES. [2024-06-03 19:22:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33772 conditions, 4254 events. 2810/4254 cut-off events. For 335508/335510 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21520 event pairs, 790 based on Foata normal form. 3/4255 useless extension candidates. Maximal degree in co-relation 33679. Up to 4209 conditions per place. [2024-06-03 19:22:16,073 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-03 19:22:16,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 242 transitions, 2869 flow [2024-06-03 19:22:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 19:22:16,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:22:16,084 INFO L175 Difference]: Start difference. First operand has 197 places, 232 transitions, 2261 flow. Second operand 7 states and 112 transitions. [2024-06-03 19:22:16,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 242 transitions, 2869 flow [2024-06-03 19:22:16,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 242 transitions, 2801 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:16,434 INFO L231 Difference]: Finished difference. Result has 199 places, 232 transitions, 2255 flow [2024-06-03 19:22:16,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2255, PETRI_PLACES=199, PETRI_TRANSITIONS=232} [2024-06-03 19:22:16,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 19:22:16,434 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 232 transitions, 2255 flow [2024-06-03 19:22:16,434 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 19:22:16,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:16,435 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 19:22:16,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:22:16,435 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 19:22:16,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2067016936, now seen corresponding path program 6 times [2024-06-03 19:22:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:16,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125996475] [2024-06-03 19:22:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:17,035 INFO 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 19:22:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125996475] [2024-06-03 19:22:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125996475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:17,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921667748] [2024-06-03 19:22:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:17,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:17,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:17,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 232 transitions, 2255 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 19:22:17,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:17,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:17,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:17,873 INFO L124 PetriNetUnfolderBase]: 2807/4250 cut-off events. [2024-06-03 19:22:17,873 INFO L125 PetriNetUnfolderBase]: For 344184/344186 co-relation queries the response was YES. [2024-06-03 19:22:17,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33895 conditions, 4250 events. 2807/4250 cut-off events. For 344184/344186 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21505 event pairs, 779 based on Foata normal form. 3/4251 useless extension candidates. Maximal degree in co-relation 33801. Up to 4215 conditions per place. [2024-06-03 19:22:17,912 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 20 changer transitions 0/241 dead transitions. [2024-06-03 19:22:17,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 241 transitions, 2753 flow [2024-06-03 19:22:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-03 19:22:17,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-03 19:22:17,913 INFO L175 Difference]: Start difference. First operand has 199 places, 232 transitions, 2255 flow. Second operand 7 states and 110 transitions. [2024-06-03 19:22:17,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 241 transitions, 2753 flow [2024-06-03 19:22:18,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 2648 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:18,259 INFO L231 Difference]: Finished difference. Result has 200 places, 232 transitions, 2196 flow [2024-06-03 19:22:18,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=200, PETRI_TRANSITIONS=232} [2024-06-03 19:22:18,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-03 19:22:18,260 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 232 transitions, 2196 flow [2024-06-03 19:22:18,260 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 19:22:18,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:18,260 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 19:22:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:22:18,261 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:18,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash -704976808, now seen corresponding path program 1 times [2024-06-03 19:22:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064215880] [2024-06-03 19:22:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:19,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064215880] [2024-06-03 19:22:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064215880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:19,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:19,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:22:19,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447417734] [2024-06-03 19:22:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:19,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:22:19,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:22:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:22:19,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:19,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 232 transitions, 2196 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:19,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:19,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:19,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:20,423 INFO L124 PetriNetUnfolderBase]: 2837/4355 cut-off events. [2024-06-03 19:22:20,424 INFO L125 PetriNetUnfolderBase]: For 374080/374080 co-relation queries the response was YES. [2024-06-03 19:22:20,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34688 conditions, 4355 events. 2837/4355 cut-off events. For 374080/374080 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22746 event pairs, 769 based on Foata normal form. 16/4369 useless extension candidates. Maximal degree in co-relation 34593. Up to 3885 conditions per place. [2024-06-03 19:22:20,467 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-03 19:22:20,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 272 transitions, 2912 flow [2024-06-03 19:22:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 19:22:20,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-03 19:22:20,469 INFO L175 Difference]: Start difference. First operand has 200 places, 232 transitions, 2196 flow. Second operand 10 states and 179 transitions. [2024-06-03 19:22:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 272 transitions, 2912 flow [2024-06-03 19:22:20,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 2870 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:20,969 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 2320 flow [2024-06-03 19:22:20,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2320, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2024-06-03 19:22:20,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 19:22:20,970 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 2320 flow [2024-06-03 19:22:20,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:20,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:20,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:22:20,970 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:20,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -95884930, now seen corresponding path program 2 times [2024-06-03 19:22:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926952017] [2024-06-03 19:22:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:22,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:22,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926952017] [2024-06-03 19:22:22,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926952017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:22,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:22,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:22,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989316309] [2024-06-03 19:22:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:22,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:22,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:22,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 2320 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:22,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:22,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:23,781 INFO L124 PetriNetUnfolderBase]: 2919/4497 cut-off events. [2024-06-03 19:22:23,781 INFO L125 PetriNetUnfolderBase]: For 389687/389687 co-relation queries the response was YES. [2024-06-03 19:22:23,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36037 conditions, 4497 events. 2919/4497 cut-off events. For 389687/389687 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23849 event pairs, 774 based on Foata normal form. 12/4507 useless extension candidates. Maximal degree in co-relation 35941. Up to 4097 conditions per place. [2024-06-03 19:22:23,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-03 19:22:23,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 272 transitions, 3008 flow [2024-06-03 19:22:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 19:22:23,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:22:23,829 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 2320 flow. Second operand 10 states and 176 transitions. [2024-06-03 19:22:23,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 272 transitions, 3008 flow [2024-06-03 19:22:24,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 2910 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:24,311 INFO L231 Difference]: Finished difference. Result has 207 places, 236 transitions, 2383 flow [2024-06-03 19:22:24,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2383, PETRI_PLACES=207, PETRI_TRANSITIONS=236} [2024-06-03 19:22:24,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-03 19:22:24,312 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 236 transitions, 2383 flow [2024-06-03 19:22:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:24,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:24,312 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 19:22:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:22:24,313 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:24,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash 573091438, now seen corresponding path program 3 times [2024-06-03 19:22:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177702292] [2024-06-03 19:22:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:25,623 INFO 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 19:22:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177702292] [2024-06-03 19:22:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177702292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:25,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:25,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849044354] [2024-06-03 19:22:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:25,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:25,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 236 transitions, 2383 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:25,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:25,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:25,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:26,801 INFO L124 PetriNetUnfolderBase]: 2960/4568 cut-off events. [2024-06-03 19:22:26,801 INFO L125 PetriNetUnfolderBase]: For 403190/403190 co-relation queries the response was YES. [2024-06-03 19:22:26,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36605 conditions, 4568 events. 2960/4568 cut-off events. For 403190/403190 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24367 event pairs, 799 based on Foata normal form. 12/4578 useless extension candidates. Maximal degree in co-relation 36508. Up to 4150 conditions per place. [2024-06-03 19:22:26,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 40 changer transitions 0/274 dead transitions. [2024-06-03 19:22:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3051 flow [2024-06-03 19:22:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:22:26,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-03 19:22:26,847 INFO L175 Difference]: Start difference. First operand has 207 places, 236 transitions, 2383 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:22:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3051 flow [2024-06-03 19:22:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 2930 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:27,348 INFO L231 Difference]: Finished difference. Result has 209 places, 237 transitions, 2412 flow [2024-06-03 19:22:27,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2412, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2024-06-03 19:22:27,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 19:22:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 2412 flow [2024-06-03 19:22:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:27,349 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 19:22:27,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:22:27,349 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:27,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1887093894, now seen corresponding path program 4 times [2024-06-03 19:22:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781537274] [2024-06-03 19:22:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:28,682 INFO 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 19:22:28,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781537274] [2024-06-03 19:22:28,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781537274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:28,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:28,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:28,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745477348] [2024-06-03 19:22:28,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:28,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:28,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:28,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:28,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:28,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:28,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 2412 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:28,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:29,802 INFO L124 PetriNetUnfolderBase]: 3035/4693 cut-off events. [2024-06-03 19:22:29,803 INFO L125 PetriNetUnfolderBase]: For 416535/416535 co-relation queries the response was YES. [2024-06-03 19:22:29,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37298 conditions, 4693 events. 3035/4693 cut-off events. For 416535/416535 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25316 event pairs, 819 based on Foata normal form. 12/4703 useless extension candidates. Maximal degree in co-relation 37200. Up to 4366 conditions per place. [2024-06-03 19:22:29,851 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 24 changer transitions 0/279 dead transitions. [2024-06-03 19:22:29,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 279 transitions, 3119 flow [2024-06-03 19:22:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 19:22:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:22:29,852 INFO L175 Difference]: Start difference. First operand has 209 places, 237 transitions, 2412 flow. Second operand 10 states and 176 transitions. [2024-06-03 19:22:29,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 279 transitions, 3119 flow [2024-06-03 19:22:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 279 transitions, 2991 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:30,251 INFO L231 Difference]: Finished difference. Result has 213 places, 243 transitions, 2454 flow [2024-06-03 19:22:30,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2454, PETRI_PLACES=213, PETRI_TRANSITIONS=243} [2024-06-03 19:22:30,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-03 19:22:30,251 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 243 transitions, 2454 flow [2024-06-03 19:22:30,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:30,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:30,252 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 19:22:30,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:22:30,252 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 19:22:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1645580766, now seen corresponding path program 5 times [2024-06-03 19:22:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114547712] [2024-06-03 19:22:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:31,623 INFO 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 19:22:31,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114547712] [2024-06-03 19:22:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114547712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:31,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494668637] [2024-06-03 19:22:31,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:31,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:31,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 243 transitions, 2454 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:31,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:31,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:31,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:32,848 INFO L124 PetriNetUnfolderBase]: 3076/4764 cut-off events. [2024-06-03 19:22:32,849 INFO L125 PetriNetUnfolderBase]: For 430434/430434 co-relation queries the response was YES. [2024-06-03 19:22:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37864 conditions, 4764 events. 3076/4764 cut-off events. For 430434/430434 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25792 event pairs, 823 based on Foata normal form. 12/4774 useless extension candidates. Maximal degree in co-relation 37763. Up to 4464 conditions per place. [2024-06-03 19:22:32,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 21 changer transitions 0/280 dead transitions. [2024-06-03 19:22:32,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 280 transitions, 3132 flow [2024-06-03 19:22:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 19:22:32,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-03 19:22:32,908 INFO L175 Difference]: Start difference. First operand has 213 places, 243 transitions, 2454 flow. Second operand 10 states and 174 transitions. [2024-06-03 19:22:32,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 280 transitions, 3132 flow [2024-06-03 19:22:33,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 280 transitions, 3047 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:33,263 INFO L231 Difference]: Finished difference. Result has 218 places, 244 transitions, 2485 flow [2024-06-03 19:22:33,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2485, PETRI_PLACES=218, PETRI_TRANSITIONS=244} [2024-06-03 19:22:33,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 19:22:33,265 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 244 transitions, 2485 flow [2024-06-03 19:22:33,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:33,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:33,266 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 19:22:33,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:22:33,266 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:33,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:33,266 INFO L85 PathProgramCache]: Analyzing trace with hash -764798668, now seen corresponding path program 6 times [2024-06-03 19:22:33,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:33,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046653118] [2024-06-03 19:22:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:34,601 INFO 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 19:22:34,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046653118] [2024-06-03 19:22:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046653118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:34,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:22:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424299980] [2024-06-03 19:22:34,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:22:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:22:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:22:34,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:34,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 244 transitions, 2485 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:34,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:34,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:34,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:35,763 INFO L124 PetriNetUnfolderBase]: 3056/4732 cut-off events. [2024-06-03 19:22:35,763 INFO L125 PetriNetUnfolderBase]: For 424658/424658 co-relation queries the response was YES. [2024-06-03 19:22:35,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 4732 events. 3056/4732 cut-off events. For 424658/424658 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25629 event pairs, 795 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 36840. Up to 4250 conditions per place. [2024-06-03 19:22:35,815 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 38 changer transitions 0/279 dead transitions. [2024-06-03 19:22:35,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 279 transitions, 3021 flow [2024-06-03 19:22:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 19:22:35,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:22:35,817 INFO L175 Difference]: Start difference. First operand has 218 places, 244 transitions, 2485 flow. Second operand 10 states and 176 transitions. [2024-06-03 19:22:35,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 279 transitions, 3021 flow [2024-06-03 19:22:36,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 2927 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:36,221 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2397 flow [2024-06-03 19:22:36,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-03 19:22:36,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 19:22:36,221 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2397 flow [2024-06-03 19:22:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:36,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:36,222 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 19:22:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:22:36,222 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 19:22:36,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2061299048, now seen corresponding path program 3 times [2024-06-03 19:22:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43034869] [2024-06-03 19:22:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:37,193 INFO 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 19:22:37,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:37,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43034869] [2024-06-03 19:22:37,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43034869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:37,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:37,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17204044] [2024-06-03 19:22:37,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:37,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:37,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2397 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 19:22:37,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:38,119 INFO L124 PetriNetUnfolderBase]: 3131/4806 cut-off events. [2024-06-03 19:22:38,119 INFO L125 PetriNetUnfolderBase]: For 414530/414530 co-relation queries the response was YES. [2024-06-03 19:22:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37170 conditions, 4806 events. 3131/4806 cut-off events. For 414530/414530 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25692 event pairs, 884 based on Foata normal form. 1/4805 useless extension candidates. Maximal degree in co-relation 37067. Up to 4781 conditions per place. [2024-06-03 19:22:38,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2024-06-03 19:22:38,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 253 transitions, 2921 flow [2024-06-03 19:22:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 19:22:38,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-03 19:22:38,169 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2397 flow. Second operand 8 states and 119 transitions. [2024-06-03 19:22:38,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 253 transitions, 2921 flow [2024-06-03 19:22:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 253 transitions, 2773 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:38,698 INFO L231 Difference]: Finished difference. Result has 219 places, 243 transitions, 2291 flow [2024-06-03 19:22:38,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2291, PETRI_PLACES=219, PETRI_TRANSITIONS=243} [2024-06-03 19:22:38,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 19:22:38,698 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 243 transitions, 2291 flow [2024-06-03 19:22:38,698 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 19:22:38,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:38,699 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 19:22:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:22:38,699 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 19:22:38,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2074643432, now seen corresponding path program 1 times [2024-06-03 19:22:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596267149] [2024-06-03 19:22:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:39,591 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 19:22:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596267149] [2024-06-03 19:22:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596267149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910818256] [2024-06-03 19:22:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:39,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:39,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 243 transitions, 2291 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:39,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:39,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:39,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:40,532 INFO L124 PetriNetUnfolderBase]: 2896/4524 cut-off events. [2024-06-03 19:22:40,532 INFO L125 PetriNetUnfolderBase]: For 406439/406450 co-relation queries the response was YES. [2024-06-03 19:22:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34941 conditions, 4524 events. 2896/4524 cut-off events. For 406439/406450 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24841 event pairs, 826 based on Foata normal form. 5/4485 useless extension candidates. Maximal degree in co-relation 34837. Up to 4358 conditions per place. [2024-06-03 19:22:40,579 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 18 changer transitions 0/258 dead transitions. [2024-06-03 19:22:40,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 258 transitions, 2837 flow [2024-06-03 19:22:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:22:40,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:22:40,580 INFO L175 Difference]: Start difference. First operand has 219 places, 243 transitions, 2291 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:22:40,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 258 transitions, 2837 flow [2024-06-03 19:22:40,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 258 transitions, 2759 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:40,965 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2311 flow [2024-06-03 19:22:40,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2311, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-03 19:22:40,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 19:22:40,966 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2311 flow [2024-06-03 19:22:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:40,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:40,966 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 19:22:40,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:22:40,966 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:40,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2033485321, now seen corresponding path program 1 times [2024-06-03 19:22:40,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:40,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481030115] [2024-06-03 19:22:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:41,768 INFO 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 19:22:41,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481030115] [2024-06-03 19:22:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481030115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:41,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:41,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508945548] [2024-06-03 19:22:41,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:41,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:41,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:41,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2311 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 19:22:41,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:41,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:41,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:42,815 INFO L124 PetriNetUnfolderBase]: 3149/4832 cut-off events. [2024-06-03 19:22:42,815 INFO L125 PetriNetUnfolderBase]: For 422830/422830 co-relation queries the response was YES. [2024-06-03 19:22:42,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37079 conditions, 4832 events. 3149/4832 cut-off events. For 422830/422830 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25842 event pairs, 885 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 36974. Up to 4760 conditions per place. [2024-06-03 19:22:42,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2024-06-03 19:22:42,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 269 transitions, 2953 flow [2024-06-03 19:22:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:22:42,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:22:42,869 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2311 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:22:42,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 269 transitions, 2953 flow [2024-06-03 19:22:43,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 2871 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:43,310 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2337 flow [2024-06-03 19:22:43,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2337, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-03 19:22:43,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 19:22:43,312 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2337 flow [2024-06-03 19:22:43,312 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 19:22:43,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:43,312 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 19:22:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:22:43,312 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:43,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1124830519, now seen corresponding path program 2 times [2024-06-03 19:22:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:43,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525087748] [2024-06-03 19:22:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:44,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525087748] [2024-06-03 19:22:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525087748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:44,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:44,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746888410] [2024-06-03 19:22:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:44,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2337 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 19:22:44,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:44,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:44,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:45,219 INFO L124 PetriNetUnfolderBase]: 3227/4940 cut-off events. [2024-06-03 19:22:45,219 INFO L125 PetriNetUnfolderBase]: For 449326/449326 co-relation queries the response was YES. [2024-06-03 19:22:45,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38698 conditions, 4940 events. 3227/4940 cut-off events. For 449326/449326 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26403 event pairs, 875 based on Foata normal form. 6/4944 useless extension candidates. Maximal degree in co-relation 38592. Up to 4695 conditions per place. [2024-06-03 19:22:45,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 49 changer transitions 0/284 dead transitions. [2024-06-03 19:22:45,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 284 transitions, 3409 flow [2024-06-03 19:22:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:22:45,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:22:45,276 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2337 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:22:45,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 284 transitions, 3409 flow [2024-06-03 19:22:45,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 284 transitions, 3323 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:45,933 INFO L231 Difference]: Finished difference. Result has 223 places, 258 transitions, 2547 flow [2024-06-03 19:22:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=223, PETRI_TRANSITIONS=258} [2024-06-03 19:22:45,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 19:22:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 258 transitions, 2547 flow [2024-06-03 19:22:45,934 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 19:22:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:45,934 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 19:22:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:22:45,935 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:45,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1036821437, now seen corresponding path program 3 times [2024-06-03 19:22:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729263646] [2024-06-03 19:22:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:46,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729263646] [2024-06-03 19:22:46,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729263646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304964193] [2024-06-03 19:22:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:46,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:46,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 258 transitions, 2547 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 19:22:46,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:46,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:46,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:47,820 INFO L124 PetriNetUnfolderBase]: 3209/4916 cut-off events. [2024-06-03 19:22:47,821 INFO L125 PetriNetUnfolderBase]: For 452427/452427 co-relation queries the response was YES. [2024-06-03 19:22:47,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38631 conditions, 4916 events. 3209/4916 cut-off events. For 452427/452427 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26257 event pairs, 871 based on Foata normal form. 6/4920 useless extension candidates. Maximal degree in co-relation 38524. Up to 4684 conditions per place. [2024-06-03 19:22:47,866 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 48 changer transitions 0/285 dead transitions. [2024-06-03 19:22:47,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 285 transitions, 3315 flow [2024-06-03 19:22:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:22:47,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 19:22:47,868 INFO L175 Difference]: Start difference. First operand has 223 places, 258 transitions, 2547 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:22:47,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 285 transitions, 3315 flow [2024-06-03 19:22:48,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 285 transitions, 3185 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:48,430 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 2519 flow [2024-06-03 19:22:48,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2519, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2024-06-03 19:22:48,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 19:22:48,431 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 2519 flow [2024-06-03 19:22:48,431 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 19:22:48,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:48,431 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 19:22:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:22:48,431 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:22:48,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1367062323, now seen corresponding path program 4 times [2024-06-03 19:22:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:48,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313025539] [2024-06-03 19:22:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313025539] [2024-06-03 19:22:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313025539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557357544] [2024-06-03 19:22:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 2519 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 19:22:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:50,387 INFO L124 PetriNetUnfolderBase]: 3239/4959 cut-off events. [2024-06-03 19:22:50,387 INFO L125 PetriNetUnfolderBase]: For 464916/464918 co-relation queries the response was YES. [2024-06-03 19:22:50,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38993 conditions, 4959 events. 3239/4959 cut-off events. For 464916/464918 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26489 event pairs, 888 based on Foata normal form. 6/4963 useless extension candidates. Maximal degree in co-relation 38884. Up to 4706 conditions per place. [2024-06-03 19:22:50,439 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 54 changer transitions 0/281 dead transitions. [2024-06-03 19:22:50,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 281 transitions, 3331 flow [2024-06-03 19:22:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:22:50,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:22:50,442 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 2519 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:22:50,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 281 transitions, 3331 flow [2024-06-03 19:22:51,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 281 transitions, 3211 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:51,003 INFO L231 Difference]: Finished difference. Result has 229 places, 261 transitions, 2583 flow [2024-06-03 19:22:51,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=229, PETRI_TRANSITIONS=261} [2024-06-03 19:22:51,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 19:22:51,004 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 261 transitions, 2583 flow [2024-06-03 19:22:51,004 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 19:22:51,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:51,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:22:51,004 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 19:22:51,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash -986297383, now seen corresponding path program 5 times [2024-06-03 19:22:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782081757] [2024-06-03 19:22:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:51,689 INFO 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 19:22:51,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:51,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782081757] [2024-06-03 19:22:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782081757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:51,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034461964] [2024-06-03 19:22:51,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:51,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:51,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 261 transitions, 2583 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 19:22:51,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:51,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:51,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:52,888 INFO L124 PetriNetUnfolderBase]: 3269/5001 cut-off events. [2024-06-03 19:22:52,888 INFO L125 PetriNetUnfolderBase]: For 479138/479140 co-relation queries the response was YES. [2024-06-03 19:22:52,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39521 conditions, 5001 events. 3269/5001 cut-off events. For 479138/479140 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26756 event pairs, 893 based on Foata normal form. 6/5005 useless extension candidates. Maximal degree in co-relation 39411. Up to 4728 conditions per place. [2024-06-03 19:22:52,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 228 selfloop transitions, 55 changer transitions 0/286 dead transitions. [2024-06-03 19:22:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 286 transitions, 3413 flow [2024-06-03 19:22:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:22:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:22:52,951 INFO L175 Difference]: Start difference. First operand has 229 places, 261 transitions, 2583 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:22:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 286 transitions, 3413 flow [2024-06-03 19:22:53,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 286 transitions, 3261 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:53,482 INFO L231 Difference]: Finished difference. Result has 232 places, 264 transitions, 2617 flow [2024-06-03 19:22:53,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2617, PETRI_PLACES=232, PETRI_TRANSITIONS=264} [2024-06-03 19:22:53,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-03 19:22:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 264 transitions, 2617 flow [2024-06-03 19:22:53,483 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 19:22:53,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:53,483 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 19:22:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:22:53,483 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 19:22:53,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -986291803, now seen corresponding path program 6 times [2024-06-03 19:22:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770465155] [2024-06-03 19:22:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:54,166 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 19:22:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770465155] [2024-06-03 19:22:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770465155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:54,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300108952] [2024-06-03 19:22:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:54,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:54,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 264 transitions, 2617 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 19:22:54,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:54,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:54,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:55,435 INFO L124 PetriNetUnfolderBase]: 3251/4977 cut-off events. [2024-06-03 19:22:55,436 INFO L125 PetriNetUnfolderBase]: For 477123/477125 co-relation queries the response was YES. [2024-06-03 19:22:55,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4977 events. 3251/4977 cut-off events. For 477123/477125 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26627 event pairs, 898 based on Foata normal form. 6/4981 useless extension candidates. Maximal degree in co-relation 38776. Up to 4717 conditions per place. [2024-06-03 19:22:55,483 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 54 changer transitions 0/286 dead transitions. [2024-06-03 19:22:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 286 transitions, 3247 flow [2024-06-03 19:22:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:22:55,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:22:55,484 INFO L175 Difference]: Start difference. First operand has 232 places, 264 transitions, 2617 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:22:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 286 transitions, 3247 flow [2024-06-03 19:22:56,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 286 transitions, 3042 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:56,156 INFO L231 Difference]: Finished difference. Result has 234 places, 264 transitions, 2526 flow [2024-06-03 19:22:56,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2526, PETRI_PLACES=234, PETRI_TRANSITIONS=264} [2024-06-03 19:22:56,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 19:22:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 264 transitions, 2526 flow [2024-06-03 19:22:56,157 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 19:22:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:56,158 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 19:22:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:22:56,158 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 19:22:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2074659304, now seen corresponding path program 1 times [2024-06-03 19:22:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:56,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448855115] [2024-06-03 19:22:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:57,319 INFO 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 19:22:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448855115] [2024-06-03 19:22:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448855115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:57,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:57,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:57,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884062806] [2024-06-03 19:22:57,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:57,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:22:57,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 264 transitions, 2526 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:57,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:22:57,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:58,391 INFO L124 PetriNetUnfolderBase]: 3033/4717 cut-off events. [2024-06-03 19:22:58,391 INFO L125 PetriNetUnfolderBase]: For 475011/475022 co-relation queries the response was YES. [2024-06-03 19:22:58,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37252 conditions, 4717 events. 3033/4717 cut-off events. For 475011/475022 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25819 event pairs, 855 based on Foata normal form. 3/4676 useless extension candidates. Maximal degree in co-relation 37140. Up to 4554 conditions per place. [2024-06-03 19:22:58,439 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2024-06-03 19:22:58,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 278 transitions, 3108 flow [2024-06-03 19:22:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:22:58,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:22:58,440 INFO L175 Difference]: Start difference. First operand has 234 places, 264 transitions, 2526 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:22:58,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 278 transitions, 3108 flow [2024-06-03 19:22:58,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 2962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:58,908 INFO L231 Difference]: Finished difference. Result has 234 places, 266 transitions, 2469 flow [2024-06-03 19:22:58,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2469, PETRI_PLACES=234, PETRI_TRANSITIONS=266} [2024-06-03 19:22:58,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 19:22:58,909 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 266 transitions, 2469 flow [2024-06-03 19:22:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:58,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:58,909 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 19:22:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:22:58,909 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 19:22:58,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1861580396, now seen corresponding path program 1 times [2024-06-03 19:22:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614382601] [2024-06-03 19:22:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614382601] [2024-06-03 19:22:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614382601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:59,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:59,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:59,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105445933] [2024-06-03 19:22:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:59,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:59,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:59,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:22:59,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 266 transitions, 2469 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 19:22:59,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:22:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:00,665 INFO L124 PetriNetUnfolderBase]: 3259/4987 cut-off events. [2024-06-03 19:23:00,665 INFO L125 PetriNetUnfolderBase]: For 487285/487285 co-relation queries the response was YES. [2024-06-03 19:23:00,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38883 conditions, 4987 events. 3259/4987 cut-off events. For 487285/487285 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26678 event pairs, 903 based on Foata normal form. 1/4986 useless extension candidates. Maximal degree in co-relation 38770. Up to 4906 conditions per place. [2024-06-03 19:23:00,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 36 changer transitions 0/299 dead transitions. [2024-06-03 19:23:00,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 299 transitions, 3380 flow [2024-06-03 19:23:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:23:00,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:23:00,718 INFO L175 Difference]: Start difference. First operand has 234 places, 266 transitions, 2469 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:23:00,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 299 transitions, 3380 flow [2024-06-03 19:23:01,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 299 transitions, 3307 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:01,192 INFO L231 Difference]: Finished difference. Result has 237 places, 273 transitions, 2603 flow [2024-06-03 19:23:01,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=237, PETRI_TRANSITIONS=273} [2024-06-03 19:23:01,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 19:23:01,193 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 273 transitions, 2603 flow [2024-06-03 19:23:01,193 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 19:23:01,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:01,193 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 19:23:01,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:23:01,194 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 19:23:01,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2033528096, now seen corresponding path program 2 times [2024-06-03 19:23:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:01,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177547643] [2024-06-03 19:23:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:02,038 INFO 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 19:23:02,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:02,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177547643] [2024-06-03 19:23:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177547643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:02,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:02,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:02,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367366683] [2024-06-03 19:23:02,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:02,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:02,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:02,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 273 transitions, 2603 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 19:23:02,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:02,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:02,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:03,171 INFO L124 PetriNetUnfolderBase]: 3264/4994 cut-off events. [2024-06-03 19:23:03,171 INFO L125 PetriNetUnfolderBase]: For 502237/502237 co-relation queries the response was YES. [2024-06-03 19:23:03,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39486 conditions, 4994 events. 3264/4994 cut-off events. For 502237/502237 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26735 event pairs, 907 based on Foata normal form. 1/4993 useless extension candidates. Maximal degree in co-relation 39371. Up to 4912 conditions per place. [2024-06-03 19:23:03,223 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-06-03 19:23:03,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 304 transitions, 3480 flow [2024-06-03 19:23:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-03 19:23:03,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-03 19:23:03,224 INFO L175 Difference]: Start difference. First operand has 237 places, 273 transitions, 2603 flow. Second operand 10 states and 163 transitions. [2024-06-03 19:23:03,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 304 transitions, 3480 flow [2024-06-03 19:23:04,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3346 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:04,035 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2616 flow [2024-06-03 19:23:04,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2616, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-03 19:23:04,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-03 19:23:04,036 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2616 flow [2024-06-03 19:23:04,036 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 19:23:04,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:04,036 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 19:23:04,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:23:04,036 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 19:23:04,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1747897940, now seen corresponding path program 1 times [2024-06-03 19:23:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:04,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425055562] [2024-06-03 19:23:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:05,003 INFO 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 19:23:05,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:05,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425055562] [2024-06-03 19:23:05,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425055562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:05,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:05,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:05,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124740267] [2024-06-03 19:23:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:05,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:05,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:05,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:05,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2616 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 19:23:05,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:05,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:05,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:06,139 INFO L124 PetriNetUnfolderBase]: 3272/5006 cut-off events. [2024-06-03 19:23:06,139 INFO L125 PetriNetUnfolderBase]: For 518239/518239 co-relation queries the response was YES. [2024-06-03 19:23:06,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39755 conditions, 5006 events. 3272/5006 cut-off events. For 518239/518239 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26680 event pairs, 773 based on Foata normal form. 2/5006 useless extension candidates. Maximal degree in co-relation 39638. Up to 4868 conditions per place. [2024-06-03 19:23:06,195 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 44 changer transitions 0/315 dead transitions. [2024-06-03 19:23:06,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 315 transitions, 3560 flow [2024-06-03 19:23:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:23:06,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 19:23:06,197 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2616 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:23:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 315 transitions, 3560 flow [2024-06-03 19:23:06,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 315 transitions, 3460 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:23:06,860 INFO L231 Difference]: Finished difference. Result has 244 places, 280 transitions, 2697 flow [2024-06-03 19:23:06,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2697, PETRI_PLACES=244, PETRI_TRANSITIONS=280} [2024-06-03 19:23:06,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 19:23:06,861 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 280 transitions, 2697 flow [2024-06-03 19:23:06,861 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 19:23:06,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:06,861 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 19:23:06,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:23:06,861 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 19:23:06,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1115695938, now seen corresponding path program 1 times [2024-06-03 19:23:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:06,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719170737] [2024-06-03 19:23:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:07,855 INFO 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 19:23:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719170737] [2024-06-03 19:23:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719170737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:07,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124144987] [2024-06-03 19:23:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:07,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:07,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 280 transitions, 2697 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 19:23:07,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:07,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:08,991 INFO L124 PetriNetUnfolderBase]: 3318/5070 cut-off events. [2024-06-03 19:23:08,991 INFO L125 PetriNetUnfolderBase]: For 541313/541313 co-relation queries the response was YES. [2024-06-03 19:23:09,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40648 conditions, 5070 events. 3318/5070 cut-off events. For 541313/541313 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27183 event pairs, 897 based on Foata normal form. 3/5071 useless extension candidates. Maximal degree in co-relation 40530. Up to 4857 conditions per place. [2024-06-03 19:23:09,043 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 63 changer transitions 0/338 dead transitions. [2024-06-03 19:23:09,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 3796 flow [2024-06-03 19:23:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:23:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:23:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-03 19:23:09,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-03 19:23:09,044 INFO L175 Difference]: Start difference. First operand has 244 places, 280 transitions, 2697 flow. Second operand 11 states and 192 transitions. [2024-06-03 19:23:09,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 3796 flow [2024-06-03 19:23:09,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 3691 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:09,790 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 2949 flow [2024-06-03 19:23:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2949, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-03 19:23:09,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-03 19:23:09,791 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 2949 flow [2024-06-03 19:23:09,791 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 19:23:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:09,791 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 19:23:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:23:09,792 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 19:23:09,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1115696248, now seen corresponding path program 2 times [2024-06-03 19:23:09,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:09,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196329189] [2024-06-03 19:23:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:09,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:10,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:10,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196329189] [2024-06-03 19:23:10,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196329189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:10,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:10,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591171135] [2024-06-03 19:23:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:10,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:10,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 2949 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 19:23:10,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:10,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:10,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:11,823 INFO L124 PetriNetUnfolderBase]: 3326/5082 cut-off events. [2024-06-03 19:23:11,828 INFO L125 PetriNetUnfolderBase]: For 553933/553933 co-relation queries the response was YES. [2024-06-03 19:23:11,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 5082 events. 3326/5082 cut-off events. For 553933/553933 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27207 event pairs, 905 based on Foata normal form. 2/5082 useless extension candidates. Maximal degree in co-relation 41728. Up to 4989 conditions per place. [2024-06-03 19:23:11,875 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 42 changer transitions 0/331 dead transitions. [2024-06-03 19:23:11,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 331 transitions, 3717 flow [2024-06-03 19:23:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 19:23:11,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:23:11,877 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 2949 flow. Second operand 10 states and 165 transitions. [2024-06-03 19:23:11,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 331 transitions, 3717 flow [2024-06-03 19:23:12,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 331 transitions, 3625 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:12,663 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 2978 flow [2024-06-03 19:23:12,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2978, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-03 19:23:12,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 19:23:12,671 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 2978 flow [2024-06-03 19:23:12,672 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 19:23:12,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:12,672 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 19:23:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:23:12,672 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 19:23:12,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash -997605406, now seen corresponding path program 1 times [2024-06-03 19:23:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914888581] [2024-06-03 19:23:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914888581] [2024-06-03 19:23:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914888581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:13,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:13,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:13,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840472214] [2024-06-03 19:23:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:13,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:13,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:13,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:13,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 2978 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 19:23:13,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:13,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:13,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:14,604 INFO L124 PetriNetUnfolderBase]: 3336/5097 cut-off events. [2024-06-03 19:23:14,605 INFO L125 PetriNetUnfolderBase]: For 567392/567394 co-relation queries the response was YES. [2024-06-03 19:23:14,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42060 conditions, 5097 events. 3336/5097 cut-off events. For 567392/567394 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27370 event pairs, 837 based on Foata normal form. 2/5097 useless extension candidates. Maximal degree in co-relation 41936. Up to 4970 conditions per place. [2024-06-03 19:23:14,665 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 30 changer transitions 0/328 dead transitions. [2024-06-03 19:23:14,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 328 transitions, 3766 flow [2024-06-03 19:23:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:23:14,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:23:14,667 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 2978 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:23:14,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 328 transitions, 3766 flow [2024-06-03 19:23:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 328 transitions, 3665 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:23:15,340 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3017 flow [2024-06-03 19:23:15,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3017, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-03 19:23:15,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 19:23:15,341 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3017 flow [2024-06-03 19:23:15,341 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 19:23:15,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:15,341 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 19:23:15,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:23:15,341 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 19:23:15,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash -997784152, now seen corresponding path program 3 times [2024-06-03 19:23:15,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:15,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47872224] [2024-06-03 19:23:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:15,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:16,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:16,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47872224] [2024-06-03 19:23:16,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47872224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:16,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:16,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066675480] [2024-06-03 19:23:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:16,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:16,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3017 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 19:23:16,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:16,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:16,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:17,153 INFO L124 PetriNetUnfolderBase]: 3349/5115 cut-off events. [2024-06-03 19:23:17,153 INFO L125 PetriNetUnfolderBase]: For 583033/583035 co-relation queries the response was YES. [2024-06-03 19:23:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42818 conditions, 5115 events. 3349/5115 cut-off events. For 583033/583035 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27450 event pairs, 904 based on Foata normal form. 3/5116 useless extension candidates. Maximal degree in co-relation 42693. Up to 4942 conditions per place. [2024-06-03 19:23:17,218 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 73 changer transitions 0/337 dead transitions. [2024-06-03 19:23:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 337 transitions, 4385 flow [2024-06-03 19:23:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:23:17,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:23:17,220 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3017 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:23:17,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 337 transitions, 4385 flow [2024-06-03 19:23:17,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 337 transitions, 4267 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:17,934 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3243 flow [2024-06-03 19:23:17,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3243, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-03 19:23:17,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-03 19:23:17,935 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3243 flow [2024-06-03 19:23:17,935 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 19:23:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:17,935 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 19:23:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:23:17,936 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 19:23:17,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -997485436, now seen corresponding path program 2 times [2024-06-03 19:23:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164735162] [2024-06-03 19:23:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:18,780 INFO 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 19:23:18,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164735162] [2024-06-03 19:23:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164735162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:18,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:18,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734544866] [2024-06-03 19:23:18,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:18,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:18,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:18,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3243 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 19:23:18,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:18,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:18,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:19,961 INFO L124 PetriNetUnfolderBase]: 3383/5162 cut-off events. [2024-06-03 19:23:19,961 INFO L125 PetriNetUnfolderBase]: For 613043/613045 co-relation queries the response was YES. [2024-06-03 19:23:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44020 conditions, 5162 events. 3383/5162 cut-off events. For 613043/613045 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27712 event pairs, 838 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 43894. Up to 4949 conditions per place. [2024-06-03 19:23:20,028 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 287 selfloop transitions, 63 changer transitions 0/353 dead transitions. [2024-06-03 19:23:20,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 353 transitions, 4588 flow [2024-06-03 19:23:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:23:20,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:23:20,029 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3243 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:23:20,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 353 transitions, 4588 flow [2024-06-03 19:23:20,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4407 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:20,792 INFO L231 Difference]: Finished difference. Result has 264 places, 328 transitions, 3504 flow [2024-06-03 19:23:20,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3504, PETRI_PLACES=264, PETRI_TRANSITIONS=328} [2024-06-03 19:23:20,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-03 19:23:20,793 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 328 transitions, 3504 flow [2024-06-03 19:23:20,793 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 19:23:20,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:20,793 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 19:23:20,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:23:20,793 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 19:23:20,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1704647302, now seen corresponding path program 4 times [2024-06-03 19:23:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:20,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863919325] [2024-06-03 19:23:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:21,501 INFO 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 19:23:21,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:21,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863919325] [2024-06-03 19:23:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863919325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:21,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680327] [2024-06-03 19:23:21,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:21,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:21,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 328 transitions, 3504 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 19:23:21,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:21,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:21,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:22,586 INFO L124 PetriNetUnfolderBase]: 3388/5169 cut-off events. [2024-06-03 19:23:22,586 INFO L125 PetriNetUnfolderBase]: For 625219/625221 co-relation queries the response was YES. [2024-06-03 19:23:22,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44444 conditions, 5169 events. 3388/5169 cut-off events. For 625219/625221 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27733 event pairs, 908 based on Foata normal form. 3/5170 useless extension candidates. Maximal degree in co-relation 44317. Up to 4995 conditions per place. [2024-06-03 19:23:22,646 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 75 changer transitions 0/352 dead transitions. [2024-06-03 19:23:22,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 352 transitions, 4598 flow [2024-06-03 19:23:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:23:22,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:23:22,647 INFO L175 Difference]: Start difference. First operand has 264 places, 328 transitions, 3504 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:23:22,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 352 transitions, 4598 flow [2024-06-03 19:23:23,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4494 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-03 19:23:23,539 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3590 flow [2024-06-03 19:23:23,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3590, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-03 19:23:23,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-03 19:23:23,539 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3590 flow [2024-06-03 19:23:23,539 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 19:23:23,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:23,540 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 19:23:23,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:23:23,540 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 19:23:23,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1866347948, now seen corresponding path program 1 times [2024-06-03 19:23:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186216435] [2024-06-03 19:23:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:24,341 INFO 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 19:23:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186216435] [2024-06-03 19:23:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186216435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:24,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:24,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32203340] [2024-06-03 19:23:24,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:24,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:24,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:24,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:24,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3590 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 19:23:24,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:24,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:24,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:25,445 INFO L124 PetriNetUnfolderBase]: 3443/5245 cut-off events. [2024-06-03 19:23:25,445 INFO L125 PetriNetUnfolderBase]: For 661835/661837 co-relation queries the response was YES. [2024-06-03 19:23:25,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45602 conditions, 5245 events. 3443/5245 cut-off events. For 661835/661837 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28143 event pairs, 900 based on Foata normal form. 5/5248 useless extension candidates. Maximal degree in co-relation 45472. Up to 5050 conditions per place. [2024-06-03 19:23:25,513 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 60 changer transitions 0/374 dead transitions. [2024-06-03 19:23:25,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 374 transitions, 4925 flow [2024-06-03 19:23:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:23:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:23:25,514 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3590 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:23:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 374 transitions, 4925 flow [2024-06-03 19:23:26,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 374 transitions, 4785 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:26,552 INFO L231 Difference]: Finished difference. Result has 274 places, 347 transitions, 3812 flow [2024-06-03 19:23:26,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3812, PETRI_PLACES=274, PETRI_TRANSITIONS=347} [2024-06-03 19:23:26,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-03 19:23:26,552 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 347 transitions, 3812 flow [2024-06-03 19:23:26,552 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 19:23:26,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:26,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:26,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:23:26,553 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 19:23:26,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2043479096, now seen corresponding path program 5 times [2024-06-03 19:23:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:26,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26577202] [2024-06-03 19:23:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:26,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:27,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26577202] [2024-06-03 19:23:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26577202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:27,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:27,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662509036] [2024-06-03 19:23:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:27,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:27,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 347 transitions, 3812 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 19:23:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:27,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:27,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:28,382 INFO L124 PetriNetUnfolderBase]: 3464/5274 cut-off events. [2024-06-03 19:23:28,382 INFO L125 PetriNetUnfolderBase]: For 680404/680406 co-relation queries the response was YES. [2024-06-03 19:23:28,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 5274 events. 3464/5274 cut-off events. For 680404/680406 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28299 event pairs, 895 based on Foata normal form. 3/5275 useless extension candidates. Maximal degree in co-relation 46601. Up to 5095 conditions per place. [2024-06-03 19:23:28,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 84 changer transitions 0/375 dead transitions. [2024-06-03 19:23:28,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 375 transitions, 5209 flow [2024-06-03 19:23:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:23:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:23:28,453 INFO L175 Difference]: Start difference. First operand has 274 places, 347 transitions, 3812 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:23:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 375 transitions, 5209 flow [2024-06-03 19:23:29,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 375 transitions, 5129 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 19:23:29,655 INFO L231 Difference]: Finished difference. Result has 280 places, 356 transitions, 4037 flow [2024-06-03 19:23:29,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=280, PETRI_TRANSITIONS=356} [2024-06-03 19:23:29,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 19:23:29,655 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 356 transitions, 4037 flow [2024-06-03 19:23:29,655 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 19:23:29,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:29,656 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 19:23:29,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:23:29,656 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:29,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -820474072, now seen corresponding path program 6 times [2024-06-03 19:23:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:29,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455608370] [2024-06-03 19:23:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:30,475 INFO 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 19:23:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455608370] [2024-06-03 19:23:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455608370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:30,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569683496] [2024-06-03 19:23:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:30,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:30,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 356 transitions, 4037 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 19:23:30,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:30,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:30,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:31,605 INFO L124 PetriNetUnfolderBase]: 3461/5269 cut-off events. [2024-06-03 19:23:31,605 INFO L125 PetriNetUnfolderBase]: For 692193/692193 co-relation queries the response was YES. [2024-06-03 19:23:31,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46735 conditions, 5269 events. 3461/5269 cut-off events. For 692193/692193 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28247 event pairs, 892 based on Foata normal form. 1/5268 useless extension candidates. Maximal degree in co-relation 46600. Up to 5205 conditions per place. [2024-06-03 19:23:31,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-03 19:23:31,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 372 transitions, 4817 flow [2024-06-03 19:23:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:23:31,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:23:31,674 INFO L175 Difference]: Start difference. First operand has 280 places, 356 transitions, 4037 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:23:31,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 372 transitions, 4817 flow [2024-06-03 19:23:32,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 372 transitions, 4686 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:32,904 INFO L231 Difference]: Finished difference. Result has 285 places, 356 transitions, 3972 flow [2024-06-03 19:23:32,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3972, PETRI_PLACES=285, PETRI_TRANSITIONS=356} [2024-06-03 19:23:32,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 19:23:32,905 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 356 transitions, 3972 flow [2024-06-03 19:23:32,905 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 19:23:32,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:32,905 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 19:23:32,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:23:32,905 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:32,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:32,906 INFO L85 PathProgramCache]: Analyzing trace with hash -820116580, now seen corresponding path program 2 times [2024-06-03 19:23:32,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:32,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988724874] [2024-06-03 19:23:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:32,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:33,684 INFO 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 19:23:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988724874] [2024-06-03 19:23:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988724874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:33,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042519868] [2024-06-03 19:23:33,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:33,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:33,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:33,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 356 transitions, 3972 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 19:23:33,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:33,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:33,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:34,787 INFO L124 PetriNetUnfolderBase]: 3524/5357 cut-off events. [2024-06-03 19:23:34,787 INFO L125 PetriNetUnfolderBase]: For 735780/735782 co-relation queries the response was YES. [2024-06-03 19:23:34,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47842 conditions, 5357 events. 3524/5357 cut-off events. For 735780/735782 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28767 event pairs, 898 based on Foata normal form. 5/5360 useless extension candidates. Maximal degree in co-relation 47706. Up to 5131 conditions per place. [2024-06-03 19:23:34,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 70 changer transitions 0/390 dead transitions. [2024-06-03 19:23:34,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 390 transitions, 5285 flow [2024-06-03 19:23:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:23:34,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 19:23:34,976 INFO L175 Difference]: Start difference. First operand has 285 places, 356 transitions, 3972 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:23:34,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 390 transitions, 5285 flow [2024-06-03 19:23:36,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 390 transitions, 5217 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:23:36,225 INFO L231 Difference]: Finished difference. Result has 286 places, 366 transitions, 4189 flow [2024-06-03 19:23:36,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4189, PETRI_PLACES=286, PETRI_TRANSITIONS=366} [2024-06-03 19:23:36,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 19:23:36,226 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 366 transitions, 4189 flow [2024-06-03 19:23:36,226 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 19:23:36,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:36,226 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 19:23:36,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:23:36,226 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:36,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1551527482, now seen corresponding path program 3 times [2024-06-03 19:23:36,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:36,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435786352] [2024-06-03 19:23:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:37,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435786352] [2024-06-03 19:23:37,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435786352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:37,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:37,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:37,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204063522] [2024-06-03 19:23:37,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:37,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:37,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 366 transitions, 4189 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 19:23:37,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:37,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:37,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:38,173 INFO L124 PetriNetUnfolderBase]: 3515/5345 cut-off events. [2024-06-03 19:23:38,173 INFO L125 PetriNetUnfolderBase]: For 743186/743188 co-relation queries the response was YES. [2024-06-03 19:23:38,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 5345 events. 3515/5345 cut-off events. For 743186/743188 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28731 event pairs, 892 based on Foata normal form. 5/5348 useless extension candidates. Maximal degree in co-relation 47787. Up to 5124 conditions per place. [2024-06-03 19:23:38,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 68 changer transitions 0/392 dead transitions. [2024-06-03 19:23:38,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 392 transitions, 5381 flow [2024-06-03 19:23:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:23:38,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:23:38,247 INFO L175 Difference]: Start difference. First operand has 286 places, 366 transitions, 4189 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:23:38,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 392 transitions, 5381 flow [2024-06-03 19:23:39,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 392 transitions, 5241 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:39,535 INFO L231 Difference]: Finished difference. Result has 290 places, 366 transitions, 4191 flow [2024-06-03 19:23:39,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=290, PETRI_TRANSITIONS=366} [2024-06-03 19:23:39,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-03 19:23:39,536 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 366 transitions, 4191 flow [2024-06-03 19:23:39,536 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 19:23:39,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:39,536 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 19:23:39,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:23:39,537 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:39,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -820353916, now seen corresponding path program 3 times [2024-06-03 19:23:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:39,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832728780] [2024-06-03 19:23:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:40,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:40,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832728780] [2024-06-03 19:23:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832728780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:40,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:40,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084231199] [2024-06-03 19:23:40,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:40,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:40,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:40,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 366 transitions, 4191 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 19:23:40,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:40,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:40,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:41,372 INFO L124 PetriNetUnfolderBase]: 3541/5381 cut-off events. [2024-06-03 19:23:41,372 INFO L125 PetriNetUnfolderBase]: For 764512/764514 co-relation queries the response was YES. [2024-06-03 19:23:41,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48502 conditions, 5381 events. 3541/5381 cut-off events. For 764512/764514 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28871 event pairs, 872 based on Foata normal form. 2/5381 useless extension candidates. Maximal degree in co-relation 48364. Up to 5157 conditions per place. [2024-06-03 19:23:41,443 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 71 changer transitions 0/393 dead transitions. [2024-06-03 19:23:41,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 393 transitions, 5501 flow [2024-06-03 19:23:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:23:41,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:23:41,444 INFO L175 Difference]: Start difference. First operand has 290 places, 366 transitions, 4191 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:23:41,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 393 transitions, 5501 flow [2024-06-03 19:23:42,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 393 transitions, 5403 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:42,759 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 4375 flow [2024-06-03 19:23:42,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-03 19:23:42,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 19:23:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 4375 flow [2024-06-03 19:23:42,760 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 19:23:42,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:42,760 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 19:23:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:23:42,760 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:42,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 863183988, now seen corresponding path program 2 times [2024-06-03 19:23:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127519228] [2024-06-03 19:23:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:43,782 INFO 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 19:23:43,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:43,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127519228] [2024-06-03 19:23:43,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127519228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:43,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:43,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047670493] [2024-06-03 19:23:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:43,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:43,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 4375 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 19:23:43,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:43,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:43,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:45,000 INFO L124 PetriNetUnfolderBase]: 3571/5422 cut-off events. [2024-06-03 19:23:45,000 INFO L125 PetriNetUnfolderBase]: For 786103/786103 co-relation queries the response was YES. [2024-06-03 19:23:45,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48971 conditions, 5422 events. 3571/5422 cut-off events. For 786103/786103 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29144 event pairs, 887 based on Foata normal form. 3/5423 useless extension candidates. Maximal degree in co-relation 48832. Up to 5261 conditions per place. [2024-06-03 19:23:45,070 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 52 changer transitions 0/403 dead transitions. [2024-06-03 19:23:45,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 5331 flow [2024-06-03 19:23:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:23:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:23:45,071 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 4375 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:23:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 5331 flow [2024-06-03 19:23:46,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 5196 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:46,067 INFO L231 Difference]: Finished difference. Result has 299 places, 379 transitions, 4439 flow [2024-06-03 19:23:46,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4439, PETRI_PLACES=299, PETRI_TRANSITIONS=379} [2024-06-03 19:23:46,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 19:23:46,068 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 379 transitions, 4439 flow [2024-06-03 19:23:46,068 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 19:23:46,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:46,068 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 19:23:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:23:46,068 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:46,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash -820466508, now seen corresponding path program 3 times [2024-06-03 19:23:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963872032] [2024-06-03 19:23:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:46,955 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 19:23:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963872032] [2024-06-03 19:23:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963872032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:46,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235332126] [2024-06-03 19:23:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:46,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:47,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 379 transitions, 4439 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 19:23:47,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:47,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:47,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:48,225 INFO L124 PetriNetUnfolderBase]: 3586/5443 cut-off events. [2024-06-03 19:23:48,225 INFO L125 PetriNetUnfolderBase]: For 804092/804092 co-relation queries the response was YES. [2024-06-03 19:23:48,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49307 conditions, 5443 events. 3586/5443 cut-off events. For 804092/804092 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29269 event pairs, 887 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 49167. Up to 5282 conditions per place. [2024-06-03 19:23:48,286 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 355 selfloop transitions, 51 changer transitions 0/409 dead transitions. [2024-06-03 19:23:48,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 409 transitions, 5403 flow [2024-06-03 19:23:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:23:48,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 19:23:48,287 INFO L175 Difference]: Start difference. First operand has 299 places, 379 transitions, 4439 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:23:48,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 409 transitions, 5403 flow [2024-06-03 19:23:49,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 409 transitions, 5268 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:49,530 INFO L231 Difference]: Finished difference. Result has 302 places, 383 transitions, 4487 flow [2024-06-03 19:23:49,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4487, PETRI_PLACES=302, PETRI_TRANSITIONS=383} [2024-06-03 19:23:49,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-03 19:23:49,531 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 383 transitions, 4487 flow [2024-06-03 19:23:49,531 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 19:23:49,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:49,532 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 19:23:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:23:49,532 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -820477048, now seen corresponding path program 3 times [2024-06-03 19:23:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355012227] [2024-06-03 19:23:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:50,582 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 19:23:50,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:50,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355012227] [2024-06-03 19:23:50,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355012227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:50,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:50,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:50,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164918260] [2024-06-03 19:23:50,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:50,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:50,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:50,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:50,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 383 transitions, 4487 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 19:23:50,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:50,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:50,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:51,830 INFO L124 PetriNetUnfolderBase]: 3594/5455 cut-off events. [2024-06-03 19:23:51,830 INFO L125 PetriNetUnfolderBase]: For 817750/817750 co-relation queries the response was YES. [2024-06-03 19:23:51,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49542 conditions, 5455 events. 3594/5455 cut-off events. For 817750/817750 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29330 event pairs, 909 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 49401. Up to 5385 conditions per place. [2024-06-03 19:23:51,910 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2024-06-03 19:23:51,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 403 transitions, 5365 flow [2024-06-03 19:23:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 19:23:51,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-03 19:23:51,912 INFO L175 Difference]: Start difference. First operand has 302 places, 383 transitions, 4487 flow. Second operand 9 states and 141 transitions. [2024-06-03 19:23:51,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 403 transitions, 5365 flow [2024-06-03 19:23:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 403 transitions, 5238 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:53,236 INFO L231 Difference]: Finished difference. Result has 306 places, 385 transitions, 4465 flow [2024-06-03 19:23:53,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4465, PETRI_PLACES=306, PETRI_TRANSITIONS=385} [2024-06-03 19:23:53,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-03 19:23:53,237 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 385 transitions, 4465 flow [2024-06-03 19:23:53,237 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 19:23:53,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:53,237 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 19:23:53,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:23:53,237 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:53,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -820476738, now seen corresponding path program 4 times [2024-06-03 19:23:53,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:53,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991945212] [2024-06-03 19:23:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:54,225 INFO 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 19:23:54,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991945212] [2024-06-03 19:23:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991945212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220681115] [2024-06-03 19:23:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:54,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:54,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 385 transitions, 4465 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 19:23:54,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:54,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:54,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:55,536 INFO L124 PetriNetUnfolderBase]: 3599/5462 cut-off events. [2024-06-03 19:23:55,536 INFO L125 PetriNetUnfolderBase]: For 831659/831659 co-relation queries the response was YES. [2024-06-03 19:23:55,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49635 conditions, 5462 events. 3599/5462 cut-off events. For 831659/831659 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29377 event pairs, 889 based on Foata normal form. 1/5461 useless extension candidates. Maximal degree in co-relation 49493. Up to 5284 conditions per place. [2024-06-03 19:23:55,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 61 changer transitions 0/416 dead transitions. [2024-06-03 19:23:55,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 416 transitions, 5440 flow [2024-06-03 19:23:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 19:23:55,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:23:55,609 INFO L175 Difference]: Start difference. First operand has 306 places, 385 transitions, 4465 flow. Second operand 10 states and 170 transitions. [2024-06-03 19:23:55,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 416 transitions, 5440 flow [2024-06-03 19:23:56,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5355 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:23:56,771 INFO L231 Difference]: Finished difference. Result has 309 places, 388 transitions, 4578 flow [2024-06-03 19:23:56,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4578, PETRI_PLACES=309, PETRI_TRANSITIONS=388} [2024-06-03 19:23:56,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-03 19:23:56,772 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 388 transitions, 4578 flow [2024-06-03 19:23:56,772 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 19:23:56,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:56,772 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 19:23:56,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:23:56,773 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:23:56,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash -864703852, now seen corresponding path program 7 times [2024-06-03 19:23:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:56,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463577440] [2024-06-03 19:23:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:57,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463577440] [2024-06-03 19:23:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463577440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:57,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:57,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037718157] [2024-06-03 19:23:57,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:57,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:57,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:23:57,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 388 transitions, 4578 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 19:23:57,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:57,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:23:57,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:58,669 INFO L124 PetriNetUnfolderBase]: 3604/5469 cut-off events. [2024-06-03 19:23:58,669 INFO L125 PetriNetUnfolderBase]: For 849780/849780 co-relation queries the response was YES. [2024-06-03 19:23:58,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50021 conditions, 5469 events. 3604/5469 cut-off events. For 849780/849780 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29396 event pairs, 907 based on Foata normal form. 1/5468 useless extension candidates. Maximal degree in co-relation 49878. Up to 5398 conditions per place. [2024-06-03 19:23:58,746 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 39 changer transitions 0/411 dead transitions. [2024-06-03 19:23:58,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 411 transitions, 5671 flow [2024-06-03 19:23:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:23:58,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:23:58,748 INFO L175 Difference]: Start difference. First operand has 309 places, 388 transitions, 4578 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:23:58,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 411 transitions, 5671 flow [2024-06-03 19:24:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 411 transitions, 5520 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:00,026 INFO L231 Difference]: Finished difference. Result has 309 places, 391 transitions, 4562 flow [2024-06-03 19:24:00,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=309, PETRI_TRANSITIONS=391} [2024-06-03 19:24:00,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-03 19:24:00,027 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 391 transitions, 4562 flow [2024-06-03 19:24:00,027 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 19:24:00,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:00,027 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 19:24:00,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:24:00,027 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:00,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1722176090, now seen corresponding path program 4 times [2024-06-03 19:24:00,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:00,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99918320] [2024-06-03 19:24:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:00,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:00,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99918320] [2024-06-03 19:24:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99918320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376411717] [2024-06-03 19:24:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:00,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:00,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:00,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 391 transitions, 4562 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 19:24:00,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:00,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:00,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:02,107 INFO L124 PetriNetUnfolderBase]: 3614/5483 cut-off events. [2024-06-03 19:24:02,107 INFO L125 PetriNetUnfolderBase]: For 871893/871893 co-relation queries the response was YES. [2024-06-03 19:24:02,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5483 events. 3614/5483 cut-off events. For 871893/871893 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29457 event pairs, 894 based on Foata normal form. 2/5483 useless extension candidates. Maximal degree in co-relation 50082. Up to 5399 conditions per place. [2024-06-03 19:24:02,181 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 23 changer transitions 0/416 dead transitions. [2024-06-03 19:24:02,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 5521 flow [2024-06-03 19:24:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:24:02,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 19:24:02,182 INFO L175 Difference]: Start difference. First operand has 309 places, 391 transitions, 4562 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:24:02,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 5521 flow [2024-06-03 19:24:03,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 5304 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:03,531 INFO L231 Difference]: Finished difference. Result has 309 places, 394 transitions, 4470 flow [2024-06-03 19:24:03,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=309, PETRI_TRANSITIONS=394} [2024-06-03 19:24:03,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-03 19:24:03,531 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 394 transitions, 4470 flow [2024-06-03 19:24:03,531 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 19:24:03,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:03,532 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 19:24:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:24:03,532 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:03,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -123534500, now seen corresponding path program 5 times [2024-06-03 19:24:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:03,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731077680] [2024-06-03 19:24:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:04,303 INFO 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 19:24:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:04,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731077680] [2024-06-03 19:24:04,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731077680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:04,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:04,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920252665] [2024-06-03 19:24:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:04,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:04,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 394 transitions, 4470 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 19:24:04,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:04,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:04,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:05,546 INFO L124 PetriNetUnfolderBase]: 3640/5519 cut-off events. [2024-06-03 19:24:05,547 INFO L125 PetriNetUnfolderBase]: For 899176/899176 co-relation queries the response was YES. [2024-06-03 19:24:05,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50750 conditions, 5519 events. 3640/5519 cut-off events. For 899176/899176 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29716 event pairs, 894 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 50607. Up to 5450 conditions per place. [2024-06-03 19:24:05,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2024-06-03 19:24:05,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 424 transitions, 5711 flow [2024-06-03 19:24:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:24:05,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:24:05,614 INFO L175 Difference]: Start difference. First operand has 309 places, 394 transitions, 4470 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:24:05,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 424 transitions, 5711 flow [2024-06-03 19:24:06,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 424 transitions, 5617 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:06,901 INFO L231 Difference]: Finished difference. Result has 314 places, 401 transitions, 4611 flow [2024-06-03 19:24:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4611, PETRI_PLACES=314, PETRI_TRANSITIONS=401} [2024-06-03 19:24:06,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 19:24:06,902 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 401 transitions, 4611 flow [2024-06-03 19:24:06,902 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 19:24:06,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:06,902 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 19:24:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:24:06,903 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:06,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180926, now seen corresponding path program 4 times [2024-06-03 19:24:06,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:06,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919643896] [2024-06-03 19:24:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:07,694 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 19:24:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919643896] [2024-06-03 19:24:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919643896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:07,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:07,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:07,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961146158] [2024-06-03 19:24:07,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:07,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 401 transitions, 4611 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 19:24:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:08,996 INFO L124 PetriNetUnfolderBase]: 3631/5507 cut-off events. [2024-06-03 19:24:08,996 INFO L125 PetriNetUnfolderBase]: For 909781/909781 co-relation queries the response was YES. [2024-06-03 19:24:09,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50627 conditions, 5507 events. 3631/5507 cut-off events. For 909781/909781 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29667 event pairs, 896 based on Foata normal form. 3/5508 useless extension candidates. Maximal degree in co-relation 50481. Up to 5415 conditions per place. [2024-06-03 19:24:09,072 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 39 changer transitions 0/422 dead transitions. [2024-06-03 19:24:09,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 422 transitions, 5693 flow [2024-06-03 19:24:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:24:09,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:24:09,073 INFO L175 Difference]: Start difference. First operand has 314 places, 401 transitions, 4611 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:24:09,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 422 transitions, 5693 flow [2024-06-03 19:24:10,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 422 transitions, 5567 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:10,398 INFO L231 Difference]: Finished difference. Result has 317 places, 401 transitions, 4569 flow [2024-06-03 19:24:10,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4569, PETRI_PLACES=317, PETRI_TRANSITIONS=401} [2024-06-03 19:24:10,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-03 19:24:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 401 transitions, 4569 flow [2024-06-03 19:24:10,399 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 19:24:10,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:10,399 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 19:24:10,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:24:10,400 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:10,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash -625484416, now seen corresponding path program 6 times [2024-06-03 19:24:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673997692] [2024-06-03 19:24:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:11,167 INFO 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 19:24:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:11,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673997692] [2024-06-03 19:24:11,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673997692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:11,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:11,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378469754] [2024-06-03 19:24:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:11,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:11,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:11,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 401 transitions, 4569 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 19:24:11,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:11,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:11,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:12,490 INFO L124 PetriNetUnfolderBase]: 3625/5499 cut-off events. [2024-06-03 19:24:12,490 INFO L125 PetriNetUnfolderBase]: For 914926/914926 co-relation queries the response was YES. [2024-06-03 19:24:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50464 conditions, 5499 events. 3625/5499 cut-off events. For 914926/914926 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29590 event pairs, 893 based on Foata normal form. 2/5499 useless extension candidates. Maximal degree in co-relation 50317. Up to 5459 conditions per place. [2024-06-03 19:24:12,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 18 changer transitions 0/418 dead transitions. [2024-06-03 19:24:12,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 418 transitions, 5445 flow [2024-06-03 19:24:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 19:24:12,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:24:12,567 INFO L175 Difference]: Start difference. First operand has 317 places, 401 transitions, 4569 flow. Second operand 8 states and 126 transitions. [2024-06-03 19:24:12,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 418 transitions, 5445 flow [2024-06-03 19:24:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 418 transitions, 5289 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:13,985 INFO L231 Difference]: Finished difference. Result has 318 places, 401 transitions, 4455 flow [2024-06-03 19:24:13,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4455, PETRI_PLACES=318, PETRI_TRANSITIONS=401} [2024-06-03 19:24:13,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 19:24:13,986 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 401 transitions, 4455 flow [2024-06-03 19:24:13,986 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 19:24:13,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:13,986 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 19:24:13,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:24:13,986 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:13,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -129670826, now seen corresponding path program 8 times [2024-06-03 19:24:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587273206] [2024-06-03 19:24:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:14,680 INFO 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 19:24:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587273206] [2024-06-03 19:24:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587273206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:14,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:14,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520002973] [2024-06-03 19:24:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:14,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 401 transitions, 4455 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 19:24:14,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:14,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:14,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:15,863 INFO L124 PetriNetUnfolderBase]: 3622/5495 cut-off events. [2024-06-03 19:24:15,864 INFO L125 PetriNetUnfolderBase]: For 923990/923990 co-relation queries the response was YES. [2024-06-03 19:24:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50394 conditions, 5495 events. 3622/5495 cut-off events. For 923990/923990 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29559 event pairs, 894 based on Foata normal form. 1/5494 useless extension candidates. Maximal degree in co-relation 50248. Up to 5425 conditions per place. [2024-06-03 19:24:15,942 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/418 dead transitions. [2024-06-03 19:24:15,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 418 transitions, 5513 flow [2024-06-03 19:24:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:24:15,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:24:15,944 INFO L175 Difference]: Start difference. First operand has 318 places, 401 transitions, 4455 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:24:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 418 transitions, 5513 flow [2024-06-03 19:24:17,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 418 transitions, 5455 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:17,476 INFO L231 Difference]: Finished difference. Result has 320 places, 401 transitions, 4477 flow [2024-06-03 19:24:17,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4477, PETRI_PLACES=320, PETRI_TRANSITIONS=401} [2024-06-03 19:24:17,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 19:24:17,477 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 401 transitions, 4477 flow [2024-06-03 19:24:17,477 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 19:24:17,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:17,478 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 19:24:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:24:17,478 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:17,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1722180740, now seen corresponding path program 7 times [2024-06-03 19:24:17,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:17,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404971716] [2024-06-03 19:24:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:18,156 INFO 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 19:24:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404971716] [2024-06-03 19:24:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404971716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:18,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232894768] [2024-06-03 19:24:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:18,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:18,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 401 transitions, 4477 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 19:24:18,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:18,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:18,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:19,411 INFO L124 PetriNetUnfolderBase]: 3616/5487 cut-off events. [2024-06-03 19:24:19,411 INFO L125 PetriNetUnfolderBase]: For 938470/938470 co-relation queries the response was YES. [2024-06-03 19:24:19,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50352 conditions, 5487 events. 3616/5487 cut-off events. For 938470/938470 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29540 event pairs, 884 based on Foata normal form. 2/5487 useless extension candidates. Maximal degree in co-relation 50205. Up to 5341 conditions per place. [2024-06-03 19:24:19,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-03 19:24:19,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 421 transitions, 5561 flow [2024-06-03 19:24:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:24:19,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 19:24:19,487 INFO L175 Difference]: Start difference. First operand has 320 places, 401 transitions, 4477 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:24:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 421 transitions, 5561 flow [2024-06-03 19:24:21,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 421 transitions, 5440 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:21,701 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 4468 flow [2024-06-03 19:24:21,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-03 19:24:21,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 19:24:21,701 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 4468 flow [2024-06-03 19:24:21,702 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 19:24:21,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:21,702 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 19:24:21,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:24:21,702 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:21,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2076859676, now seen corresponding path program 5 times [2024-06-03 19:24:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:21,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792004466] [2024-06-03 19:24:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:22,365 INFO 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 19:24:22,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792004466] [2024-06-03 19:24:22,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792004466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:22,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:22,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:22,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304744343] [2024-06-03 19:24:22,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:22,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:22,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:22,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 4468 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 19:24:22,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:22,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:22,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:23,731 INFO L124 PetriNetUnfolderBase]: 3631/5508 cut-off events. [2024-06-03 19:24:23,731 INFO L125 PetriNetUnfolderBase]: For 962217/962217 co-relation queries the response was YES. [2024-06-03 19:24:23,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 5508 events. 3631/5508 cut-off events. For 962217/962217 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29641 event pairs, 898 based on Foata normal form. 3/5509 useless extension candidates. Maximal degree in co-relation 50585. Up to 5456 conditions per place. [2024-06-03 19:24:23,796 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 29 changer transitions 0/420 dead transitions. [2024-06-03 19:24:23,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 420 transitions, 5397 flow [2024-06-03 19:24:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:24:23,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:24:23,797 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 4468 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:24:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 420 transitions, 5397 flow [2024-06-03 19:24:25,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 420 transitions, 5203 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:25,982 INFO L231 Difference]: Finished difference. Result has 323 places, 405 transitions, 4397 flow [2024-06-03 19:24:25,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4397, PETRI_PLACES=323, PETRI_TRANSITIONS=405} [2024-06-03 19:24:25,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-03 19:24:25,983 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 405 transitions, 4397 flow [2024-06-03 19:24:25,983 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 19:24:25,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:25,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:25,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:24:25,983 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:25,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2076443780, now seen corresponding path program 8 times [2024-06-03 19:24:25,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:25,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682520416] [2024-06-03 19:24:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:26,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:26,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682520416] [2024-06-03 19:24:26,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682520416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:26,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:26,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:26,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776801230] [2024-06-03 19:24:26,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:26,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:26,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:26,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 405 transitions, 4397 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 19:24:26,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:26,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:26,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:27,931 INFO L124 PetriNetUnfolderBase]: 3657/5544 cut-off events. [2024-06-03 19:24:27,932 INFO L125 PetriNetUnfolderBase]: For 986269/986269 co-relation queries the response was YES. [2024-06-03 19:24:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51281 conditions, 5544 events. 3657/5544 cut-off events. For 986269/986269 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29860 event pairs, 898 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 51133. Up to 5471 conditions per place. [2024-06-03 19:24:28,009 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 38 changer transitions 0/428 dead transitions. [2024-06-03 19:24:28,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 428 transitions, 5636 flow [2024-06-03 19:24:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:24:28,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:24:28,011 INFO L175 Difference]: Start difference. First operand has 323 places, 405 transitions, 4397 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:24:28,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 428 transitions, 5636 flow [2024-06-03 19:24:30,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 428 transitions, 5532 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:30,136 INFO L231 Difference]: Finished difference. Result has 325 places, 412 transitions, 4532 flow [2024-06-03 19:24:30,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=325, PETRI_TRANSITIONS=412} [2024-06-03 19:24:30,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-03 19:24:30,137 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 412 transitions, 4532 flow [2024-06-03 19:24:30,137 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 19:24:30,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:30,137 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 19:24:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:24:30,138 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:30,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash -510430210, now seen corresponding path program 6 times [2024-06-03 19:24:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:30,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795043331] [2024-06-03 19:24:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:30,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:30,893 INFO 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 19:24:30,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795043331] [2024-06-03 19:24:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795043331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:30,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:30,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035966916] [2024-06-03 19:24:30,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:30,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:30,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:30,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 412 transitions, 4532 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 19:24:30,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:30,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:30,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:32,192 INFO L124 PetriNetUnfolderBase]: 3672/5565 cut-off events. [2024-06-03 19:24:32,192 INFO L125 PetriNetUnfolderBase]: For 1010188/1010188 co-relation queries the response was YES. [2024-06-03 19:24:32,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51462 conditions, 5565 events. 3672/5565 cut-off events. For 1010188/1010188 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29980 event pairs, 895 based on Foata normal form. 3/5566 useless extension candidates. Maximal degree in co-relation 51314. Up to 5501 conditions per place. [2024-06-03 19:24:32,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 34 changer transitions 0/432 dead transitions. [2024-06-03 19:24:32,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 432 transitions, 5496 flow [2024-06-03 19:24:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:24:32,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:24:32,272 INFO L175 Difference]: Start difference. First operand has 325 places, 412 transitions, 4532 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:24:32,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 432 transitions, 5496 flow [2024-06-03 19:24:34,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 432 transitions, 5403 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:34,304 INFO L231 Difference]: Finished difference. Result has 330 places, 415 transitions, 4573 flow [2024-06-03 19:24:34,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=330, PETRI_TRANSITIONS=415} [2024-06-03 19:24:34,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-03 19:24:34,305 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 415 transitions, 4573 flow [2024-06-03 19:24:34,305 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 19:24:34,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:34,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:34,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:24:34,306 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:34,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1732357544, now seen corresponding path program 9 times [2024-06-03 19:24:34,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:34,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127190414] [2024-06-03 19:24:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:34,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:35,090 INFO 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 19:24:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127190414] [2024-06-03 19:24:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127190414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:35,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:35,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050539690] [2024-06-03 19:24:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:35,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:35,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:35,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:35,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 415 transitions, 4573 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 19:24:35,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:35,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:35,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:36,344 INFO L124 PetriNetUnfolderBase]: 3677/5572 cut-off events. [2024-06-03 19:24:36,344 INFO L125 PetriNetUnfolderBase]: For 1019984/1019984 co-relation queries the response was YES. [2024-06-03 19:24:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51731 conditions, 5572 events. 3677/5572 cut-off events. For 1019984/1019984 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29994 event pairs, 898 based on Foata normal form. 1/5571 useless extension candidates. Maximal degree in co-relation 51581. Up to 5535 conditions per place. [2024-06-03 19:24:36,425 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 23 changer transitions 0/431 dead transitions. [2024-06-03 19:24:36,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 431 transitions, 5503 flow [2024-06-03 19:24:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:24:36,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:24:36,427 INFO L175 Difference]: Start difference. First operand has 330 places, 415 transitions, 4573 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:24:36,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 431 transitions, 5503 flow [2024-06-03 19:24:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 5403 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:38,676 INFO L231 Difference]: Finished difference. Result has 332 places, 418 transitions, 4573 flow [2024-06-03 19:24:38,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=332, PETRI_TRANSITIONS=418} [2024-06-03 19:24:38,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-03 19:24:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 418 transitions, 4573 flow [2024-06-03 19:24:38,677 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 19:24:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:38,677 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 19:24:38,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:24:38,678 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:38,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2076680930, now seen corresponding path program 9 times [2024-06-03 19:24:38,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310074991] [2024-06-03 19:24:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:39,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310074991] [2024-06-03 19:24:39,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310074991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:39,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:39,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554233567] [2024-06-03 19:24:39,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:39,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:39,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:39,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:39,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:39,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 418 transitions, 4573 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 19:24:39,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:39,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:39,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:40,766 INFO L124 PetriNetUnfolderBase]: 3671/5564 cut-off events. [2024-06-03 19:24:40,767 INFO L125 PetriNetUnfolderBase]: For 1034015/1034015 co-relation queries the response was YES. [2024-06-03 19:24:40,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51554 conditions, 5564 events. 3671/5564 cut-off events. For 1034015/1034015 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29956 event pairs, 897 based on Foata normal form. 2/5564 useless extension candidates. Maximal degree in co-relation 51403. Up to 5509 conditions per place. [2024-06-03 19:24:40,842 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 30 changer transitions 0/432 dead transitions. [2024-06-03 19:24:40,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 432 transitions, 5469 flow [2024-06-03 19:24:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:24:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:24:40,844 INFO L175 Difference]: Start difference. First operand has 332 places, 418 transitions, 4573 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:24:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 432 transitions, 5469 flow [2024-06-03 19:24:43,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 432 transitions, 5365 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:43,112 INFO L231 Difference]: Finished difference. Result has 334 places, 418 transitions, 4535 flow [2024-06-03 19:24:43,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4535, PETRI_PLACES=334, PETRI_TRANSITIONS=418} [2024-06-03 19:24:43,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-03 19:24:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 418 transitions, 4535 flow [2024-06-03 19:24:43,113 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 19:24:43,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:43,113 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 19:24:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:24:43,114 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:43,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 570734168, now seen corresponding path program 7 times [2024-06-03 19:24:43,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:43,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488007546] [2024-06-03 19:24:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:43,834 INFO 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 19:24:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:43,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488007546] [2024-06-03 19:24:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488007546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:43,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:43,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040020318] [2024-06-03 19:24:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:43,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:43,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 418 transitions, 4535 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 19:24:43,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:43,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:43,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:45,221 INFO L124 PetriNetUnfolderBase]: 3686/5586 cut-off events. [2024-06-03 19:24:45,222 INFO L125 PetriNetUnfolderBase]: For 1059449/1059451 co-relation queries the response was YES. [2024-06-03 19:24:45,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51877 conditions, 5586 events. 3686/5586 cut-off events. For 1059449/1059451 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 30136 event pairs, 900 based on Foata normal form. 5/5589 useless extension candidates. Maximal degree in co-relation 51725. Up to 5533 conditions per place. [2024-06-03 19:24:45,289 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 31 changer transitions 0/434 dead transitions. [2024-06-03 19:24:45,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 434 transitions, 5496 flow [2024-06-03 19:24:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:24:45,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:24:45,290 INFO L175 Difference]: Start difference. First operand has 334 places, 418 transitions, 4535 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:24:45,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 434 transitions, 5496 flow [2024-06-03 19:24:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 5404 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:46,999 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 4582 flow [2024-06-03 19:24:46,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4582, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-03 19:24:47,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-03 19:24:47,000 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 4582 flow [2024-06-03 19:24:47,000 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 19:24:47,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:47,000 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 19:24:47,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:24:47,000 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:47,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -344791262, now seen corresponding path program 10 times [2024-06-03 19:24:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:47,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342471241] [2024-06-03 19:24:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:47,775 INFO 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 19:24:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:47,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342471241] [2024-06-03 19:24:47,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342471241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:47,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:47,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:47,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824707853] [2024-06-03 19:24:47,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:47,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:47,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:47,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 4582 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 19:24:47,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:47,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:47,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:49,078 INFO L124 PetriNetUnfolderBase]: 3696/5600 cut-off events. [2024-06-03 19:24:49,078 INFO L125 PetriNetUnfolderBase]: For 1075292/1075294 co-relation queries the response was YES. [2024-06-03 19:24:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 5600 events. 3696/5600 cut-off events. For 1075292/1075294 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30211 event pairs, 904 based on Foata normal form. 2/5600 useless extension candidates. Maximal degree in co-relation 52062. Up to 5532 conditions per place. [2024-06-03 19:24:49,158 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 400 selfloop transitions, 35 changer transitions 0/438 dead transitions. [2024-06-03 19:24:49,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 438 transitions, 5769 flow [2024-06-03 19:24:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:24:49,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:24:49,159 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 4582 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:24:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 438 transitions, 5769 flow [2024-06-03 19:24:51,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 438 transitions, 5685 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:51,993 INFO L231 Difference]: Finished difference. Result has 338 places, 425 transitions, 4651 flow [2024-06-03 19:24:51,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4651, PETRI_PLACES=338, PETRI_TRANSITIONS=425} [2024-06-03 19:24:51,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-03 19:24:51,993 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 425 transitions, 4651 flow [2024-06-03 19:24:51,993 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 19:24:51,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:51,994 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 19:24:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:24:51,994 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:51,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -118873642, now seen corresponding path program 8 times [2024-06-03 19:24:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058164003] [2024-06-03 19:24:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:52,768 INFO 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 19:24:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058164003] [2024-06-03 19:24:52,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058164003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:52,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:52,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643377701] [2024-06-03 19:24:52,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:52,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:52,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 425 transitions, 4651 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 19:24:52,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:52,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:54,080 INFO L124 PetriNetUnfolderBase]: 3735/5654 cut-off events. [2024-06-03 19:24:54,080 INFO L125 PetriNetUnfolderBase]: For 1117335/1117337 co-relation queries the response was YES. [2024-06-03 19:24:54,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53061 conditions, 5654 events. 3735/5654 cut-off events. For 1117335/1117337 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30534 event pairs, 894 based on Foata normal form. 5/5657 useless extension candidates. Maximal degree in co-relation 52908. Up to 5556 conditions per place. [2024-06-03 19:24:54,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 42 changer transitions 0/447 dead transitions. [2024-06-03 19:24:54,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 447 transitions, 5912 flow [2024-06-03 19:24:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:24:54,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:24:54,171 INFO L175 Difference]: Start difference. First operand has 338 places, 425 transitions, 4651 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:24:54,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 447 transitions, 5912 flow [2024-06-03 19:24:56,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 447 transitions, 5695 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:56,149 INFO L231 Difference]: Finished difference. Result has 339 places, 432 transitions, 4677 flow [2024-06-03 19:24:56,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4434, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4677, PETRI_PLACES=339, PETRI_TRANSITIONS=432} [2024-06-03 19:24:56,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-03 19:24:56,149 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 432 transitions, 4677 flow [2024-06-03 19:24:56,149 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 19:24:56,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:56,150 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 19:24:56,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:24:56,150 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:24:56,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash -510697682, now seen corresponding path program 10 times [2024-06-03 19:24:56,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:56,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931097203] [2024-06-03 19:24:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:56,817 INFO 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 19:24:56,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:56,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931097203] [2024-06-03 19:24:56,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931097203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:56,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:56,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526084842] [2024-06-03 19:24:56,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:56,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:56,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:24:56,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 432 transitions, 4677 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 19:24:56,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:56,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:24:56,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:58,092 INFO L124 PetriNetUnfolderBase]: 3732/5650 cut-off events. [2024-06-03 19:24:58,092 INFO L125 PetriNetUnfolderBase]: For 1121614/1121616 co-relation queries the response was YES. [2024-06-03 19:24:58,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53036 conditions, 5650 events. 3732/5650 cut-off events. For 1121614/1121616 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30516 event pairs, 902 based on Foata normal form. 3/5651 useless extension candidates. Maximal degree in co-relation 52883. Up to 5612 conditions per place. [2024-06-03 19:24:58,180 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 23 changer transitions 0/442 dead transitions. [2024-06-03 19:24:58,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 442 transitions, 5579 flow [2024-06-03 19:24:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:24:58,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-03 19:24:58,181 INFO L175 Difference]: Start difference. First operand has 339 places, 432 transitions, 4677 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:24:58,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 442 transitions, 5579 flow [2024-06-03 19:25:01,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 442 transitions, 5451 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:01,090 INFO L231 Difference]: Finished difference. Result has 342 places, 432 transitions, 4601 flow [2024-06-03 19:25:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=342, PETRI_TRANSITIONS=432} [2024-06-03 19:25:01,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-03 19:25:01,091 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 432 transitions, 4601 flow [2024-06-03 19:25:01,091 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 19:25:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:01,091 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 19:25:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:25:01,091 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -346746148, now seen corresponding path program 11 times [2024-06-03 19:25:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735833218] [2024-06-03 19:25:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:01,803 INFO 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 19:25:01,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:01,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735833218] [2024-06-03 19:25:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735833218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:01,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658648354] [2024-06-03 19:25:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:01,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:01,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 432 transitions, 4601 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 19:25:01,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:01,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:03,176 INFO L124 PetriNetUnfolderBase]: 3726/5642 cut-off events. [2024-06-03 19:25:03,177 INFO L125 PetriNetUnfolderBase]: For 1135924/1135926 co-relation queries the response was YES. [2024-06-03 19:25:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52748 conditions, 5642 events. 3726/5642 cut-off events. For 1135924/1135926 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30429 event pairs, 905 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 52594. Up to 5586 conditions per place. [2024-06-03 19:25:03,264 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-03 19:25:03,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 5511 flow [2024-06-03 19:25:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:25:03,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:25:03,266 INFO L175 Difference]: Start difference. First operand has 342 places, 432 transitions, 4601 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:25:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 5511 flow [2024-06-03 19:25:06,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 443 transitions, 5417 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:06,262 INFO L231 Difference]: Finished difference. Result has 344 places, 432 transitions, 4573 flow [2024-06-03 19:25:06,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=344, PETRI_TRANSITIONS=432} [2024-06-03 19:25:06,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 19:25:06,262 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 432 transitions, 4573 flow [2024-06-03 19:25:06,262 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 19:25:06,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:06,263 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 19:25:06,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:25:06,263 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:06,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash -346567402, now seen corresponding path program 9 times [2024-06-03 19:25:06,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:06,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005421077] [2024-06-03 19:25:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005421077] [2024-06-03 19:25:06,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005421077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:06,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:06,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48969118] [2024-06-03 19:25:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:07,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 432 transitions, 4573 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 19:25:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:07,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:08,371 INFO L124 PetriNetUnfolderBase]: 3717/5630 cut-off events. [2024-06-03 19:25:08,372 INFO L125 PetriNetUnfolderBase]: For 1145413/1145415 co-relation queries the response was YES. [2024-06-03 19:25:08,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 5630 events. 3717/5630 cut-off events. For 1145413/1145415 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30390 event pairs, 899 based on Foata normal form. 5/5633 useless extension candidates. Maximal degree in co-relation 52359. Up to 5577 conditions per place. [2024-06-03 19:25:08,451 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 30 changer transitions 0/444 dead transitions. [2024-06-03 19:25:08,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 444 transitions, 5489 flow [2024-06-03 19:25:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:25:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 19:25:08,453 INFO L175 Difference]: Start difference. First operand has 344 places, 432 transitions, 4573 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:25:08,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 444 transitions, 5489 flow [2024-06-03 19:25:11,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 444 transitions, 5393 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:11,854 INFO L231 Difference]: Finished difference. Result has 345 places, 432 transitions, 4543 flow [2024-06-03 19:25:11,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4543, PETRI_PLACES=345, PETRI_TRANSITIONS=432} [2024-06-03 19:25:11,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-03 19:25:11,855 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 432 transitions, 4543 flow [2024-06-03 19:25:11,855 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 19:25:11,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:11,855 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 19:25:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:25:11,855 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:11,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash -524114818, now seen corresponding path program 12 times [2024-06-03 19:25:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467220030] [2024-06-03 19:25:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:12,640 INFO 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 19:25:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467220030] [2024-06-03 19:25:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467220030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332565404] [2024-06-03 19:25:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:12,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:12,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:12,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 432 transitions, 4543 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 19:25:12,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:12,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:12,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:14,043 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-03 19:25:14,044 INFO L125 PetriNetUnfolderBase]: For 1149049/1149051 co-relation queries the response was YES. [2024-06-03 19:25:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52384 conditions, 5622 events. 3711/5622 cut-off events. For 1149049/1149051 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30361 event pairs, 902 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 52228. Up to 5524 conditions per place. [2024-06-03 19:25:14,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 53 changer transitions 0/444 dead transitions. [2024-06-03 19:25:14,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 444 transitions, 5461 flow [2024-06-03 19:25:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:25:14,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:25:14,116 INFO L175 Difference]: Start difference. First operand has 345 places, 432 transitions, 4543 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:25:14,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 444 transitions, 5461 flow [2024-06-03 19:25:16,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 444 transitions, 5333 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:16,943 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4527 flow [2024-06-03 19:25:16,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4527, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-03 19:25:16,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-03 19:25:16,943 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4527 flow [2024-06-03 19:25:16,943 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 19:25:16,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:16,944 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 19:25:16,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:25:16,944 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:16,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -510697310, now seen corresponding path program 10 times [2024-06-03 19:25:16,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:16,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86026264] [2024-06-03 19:25:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:16,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:17,615 INFO 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 19:25:17,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86026264] [2024-06-03 19:25:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86026264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336239065] [2024-06-03 19:25:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:17,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:17,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4527 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 19:25:17,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:17,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:17,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:18,939 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-03 19:25:18,939 INFO L125 PetriNetUnfolderBase]: For 1157744/1157746 co-relation queries the response was YES. [2024-06-03 19:25:19,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52138 conditions, 5610 events. 3702/5610 cut-off events. For 1157744/1157746 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30313 event pairs, 900 based on Foata normal form. 5/5613 useless extension candidates. Maximal degree in co-relation 51981. Up to 5536 conditions per place. [2024-06-03 19:25:19,028 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 38 changer transitions 0/446 dead transitions. [2024-06-03 19:25:19,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 5457 flow [2024-06-03 19:25:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:25:19,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:25:19,029 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4527 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:25:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 5457 flow [2024-06-03 19:25:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 446 transitions, 5256 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:25:22,102 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 4408 flow [2024-06-03 19:25:22,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4408, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-03 19:25:22,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-03 19:25:22,103 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 4408 flow [2024-06-03 19:25:22,103 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 19:25:22,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:22,103 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 19:25:22,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:25:22,103 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:22,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash -524115004, now seen corresponding path program 11 times [2024-06-03 19:25:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:22,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449726055] [2024-06-03 19:25:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:22,922 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 19:25:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449726055] [2024-06-03 19:25:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449726055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:22,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:22,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126739784] [2024-06-03 19:25:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:22,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:22,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:23,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:23,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 4408 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 19:25:23,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:23,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:23,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:24,197 INFO L124 PetriNetUnfolderBase]: 3699/5606 cut-off events. [2024-06-03 19:25:24,197 INFO L125 PetriNetUnfolderBase]: For 1160138/1160140 co-relation queries the response was YES. [2024-06-03 19:25:24,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52083 conditions, 5606 events. 3699/5606 cut-off events. For 1160138/1160140 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30265 event pairs, 901 based on Foata normal form. 3/5607 useless extension candidates. Maximal degree in co-relation 51925. Up to 5546 conditions per place. [2024-06-03 19:25:24,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 40 changer transitions 0/443 dead transitions. [2024-06-03 19:25:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 443 transitions, 5530 flow [2024-06-03 19:25:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:25:24,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 19:25:24,283 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 4408 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:25:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 443 transitions, 5530 flow [2024-06-03 19:25:27,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 443 transitions, 5378 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:27,223 INFO L231 Difference]: Finished difference. Result has 347 places, 432 transitions, 4342 flow [2024-06-03 19:25:27,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4256, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4342, PETRI_PLACES=347, PETRI_TRANSITIONS=432} [2024-06-03 19:25:27,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-03 19:25:27,223 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 432 transitions, 4342 flow [2024-06-03 19:25:27,223 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 19:25:27,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:27,223 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 19:25:27,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:25:27,224 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:27,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -524114632, now seen corresponding path program 11 times [2024-06-03 19:25:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092114089] [2024-06-03 19:25:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:28,018 INFO 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 19:25:28,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092114089] [2024-06-03 19:25:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092114089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537471636] [2024-06-03 19:25:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:28,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:28,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 432 transitions, 4342 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 19:25:28,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:28,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:28,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:29,290 INFO L124 PetriNetUnfolderBase]: 3714/5627 cut-off events. [2024-06-03 19:25:29,290 INFO L125 PetriNetUnfolderBase]: For 1192141/1192143 co-relation queries the response was YES. [2024-06-03 19:25:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52291 conditions, 5627 events. 3714/5627 cut-off events. For 1192141/1192143 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30385 event pairs, 891 based on Foata normal form. 5/5630 useless extension candidates. Maximal degree in co-relation 52132. Up to 5468 conditions per place. [2024-06-03 19:25:29,378 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 63 changer transitions 0/452 dead transitions. [2024-06-03 19:25:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 5566 flow [2024-06-03 19:25:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:25:29,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:25:29,380 INFO L175 Difference]: Start difference. First operand has 347 places, 432 transitions, 4342 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:25:29,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 5566 flow [2024-06-03 19:25:32,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 452 transitions, 5399 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:25:32,353 INFO L231 Difference]: Finished difference. Result has 347 places, 435 transitions, 4359 flow [2024-06-03 19:25:32,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4359, PETRI_PLACES=347, PETRI_TRANSITIONS=435} [2024-06-03 19:25:32,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-03 19:25:32,353 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 435 transitions, 4359 flow [2024-06-03 19:25:32,354 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 19:25:32,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:32,354 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 19:25:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:25:32,354 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:32,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1227361606, now seen corresponding path program 12 times [2024-06-03 19:25:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431627767] [2024-06-03 19:25:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:33,174 INFO 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 19:25:33,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:33,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431627767] [2024-06-03 19:25:33,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431627767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:33,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:33,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016339211] [2024-06-03 19:25:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:33,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:33,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 435 transitions, 4359 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 19:25:33,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:33,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:33,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:34,500 INFO L124 PetriNetUnfolderBase]: 3711/5622 cut-off events. [2024-06-03 19:25:34,500 INFO L125 PetriNetUnfolderBase]: For 1195231/1195231 co-relation queries the response was YES. [2024-06-03 19:25:34,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52418 conditions, 5622 events. 3711/5622 cut-off events. For 1195231/1195231 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30361 event pairs, 906 based on Foata normal form. 1/5621 useless extension candidates. Maximal degree in co-relation 52259. Up to 5597 conditions per place. [2024-06-03 19:25:34,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 18 changer transitions 0/445 dead transitions. [2024-06-03 19:25:34,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 445 transitions, 5267 flow [2024-06-03 19:25:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 19:25:34,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-03 19:25:34,584 INFO L175 Difference]: Start difference. First operand has 347 places, 435 transitions, 4359 flow. Second operand 8 states and 119 transitions. [2024-06-03 19:25:34,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 445 transitions, 5267 flow [2024-06-03 19:25:36,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 445 transitions, 5005 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:36,904 INFO L231 Difference]: Finished difference. Result has 348 places, 435 transitions, 4139 flow [2024-06-03 19:25:36,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4139, PETRI_PLACES=348, PETRI_TRANSITIONS=435} [2024-06-03 19:25:36,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 19:25:36,905 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 435 transitions, 4139 flow [2024-06-03 19:25:36,905 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 19:25:36,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:36,905 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 19:25:36,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:25:36,905 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:36,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1227234754, now seen corresponding path program 12 times [2024-06-03 19:25:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:36,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358132448] [2024-06-03 19:25:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:37,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:37,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358132448] [2024-06-03 19:25:37,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358132448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:37,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065472492] [2024-06-03 19:25:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:37,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:37,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 435 transitions, 4139 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 19:25:37,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:37,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:37,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:38,999 INFO L124 PetriNetUnfolderBase]: 3702/5611 cut-off events. [2024-06-03 19:25:38,999 INFO L125 PetriNetUnfolderBase]: For 1208051/1208053 co-relation queries the response was YES. [2024-06-03 19:25:39,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51863 conditions, 5611 events. 3702/5611 cut-off events. For 1208051/1208053 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30338 event pairs, 905 based on Foata normal form. 5/5614 useless extension candidates. Maximal degree in co-relation 51703. Up to 5457 conditions per place. [2024-06-03 19:25:39,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 64 changer transitions 0/451 dead transitions. [2024-06-03 19:25:39,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 451 transitions, 5089 flow [2024-06-03 19:25:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:25:39,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:25:39,073 INFO L175 Difference]: Start difference. First operand has 348 places, 435 transitions, 4139 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:25:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 451 transitions, 5089 flow [2024-06-03 19:25:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 451 transitions, 5031 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:40,860 INFO L231 Difference]: Finished difference. Result has 349 places, 435 transitions, 4215 flow [2024-06-03 19:25:40,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=349, PETRI_TRANSITIONS=435} [2024-06-03 19:25:40,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 19:25:40,860 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 435 transitions, 4215 flow [2024-06-03 19:25:40,860 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 19:25:40,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:40,861 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 19:25:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:25:40,861 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -124384140, now seen corresponding path program 5 times [2024-06-03 19:25:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102340870] [2024-06-03 19:25:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:41,760 INFO 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 19:25:41,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102340870] [2024-06-03 19:25:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102340870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:41,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:41,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127881892] [2024-06-03 19:25:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:41,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:41,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 435 transitions, 4215 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 19:25:41,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:41,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:43,227 INFO L124 PetriNetUnfolderBase]: 3707/5617 cut-off events. [2024-06-03 19:25:43,227 INFO L125 PetriNetUnfolderBase]: For 1216943/1216943 co-relation queries the response was YES. [2024-06-03 19:25:43,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52267 conditions, 5617 events. 3707/5617 cut-off events. For 1216943/1216943 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30361 event pairs, 903 based on Foata normal form. 1/5616 useless extension candidates. Maximal degree in co-relation 52106. Up to 5589 conditions per place. [2024-06-03 19:25:43,295 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 21 changer transitions 0/455 dead transitions. [2024-06-03 19:25:43,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 455 transitions, 5264 flow [2024-06-03 19:25:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-03 19:25:43,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-03 19:25:43,296 INFO L175 Difference]: Start difference. First operand has 349 places, 435 transitions, 4215 flow. Second operand 9 states and 131 transitions. [2024-06-03 19:25:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 455 transitions, 5264 flow [2024-06-03 19:25:45,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 5105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:45,480 INFO L231 Difference]: Finished difference. Result has 353 places, 444 transitions, 4247 flow [2024-06-03 19:25:45,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4247, PETRI_PLACES=353, PETRI_TRANSITIONS=444} [2024-06-03 19:25:45,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 19:25:45,481 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 444 transitions, 4247 flow [2024-06-03 19:25:45,481 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 19:25:45,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:45,481 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 19:25:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:25:45,482 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:45,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -524237950, now seen corresponding path program 4 times [2024-06-03 19:25:45,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:45,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274673945] [2024-06-03 19:25:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:46,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:46,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274673945] [2024-06-03 19:25:46,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274673945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:46,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:46,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981485390] [2024-06-03 19:25:46,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:46,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:46,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:46,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:46,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:46,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 444 transitions, 4247 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 19:25:46,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:46,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:46,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:47,927 INFO L124 PetriNetUnfolderBase]: 3702/5610 cut-off events. [2024-06-03 19:25:47,928 INFO L125 PetriNetUnfolderBase]: For 1231842/1231842 co-relation queries the response was YES. [2024-06-03 19:25:47,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 5610 events. 3702/5610 cut-off events. For 1231842/1231842 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30331 event pairs, 902 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 51949. Up to 5579 conditions per place. [2024-06-03 19:25:48,000 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 20 changer transitions 0/456 dead transitions. [2024-06-03 19:25:48,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 456 transitions, 5181 flow [2024-06-03 19:25:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-03 19:25:48,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34656084656084657 [2024-06-03 19:25:48,001 INFO L175 Difference]: Start difference. First operand has 353 places, 444 transitions, 4247 flow. Second operand 9 states and 131 transitions. [2024-06-03 19:25:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 456 transitions, 5181 flow [2024-06-03 19:25:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 456 transitions, 5086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:50,270 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 4197 flow [2024-06-03 19:25:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4197, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-03 19:25:50,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-03 19:25:50,270 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 4197 flow [2024-06-03 19:25:50,270 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 19:25:50,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:50,270 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 19:25:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:25:50,271 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:50,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash 323888318, now seen corresponding path program 6 times [2024-06-03 19:25:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:50,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375719302] [2024-06-03 19:25:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:50,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:51,214 INFO 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 19:25:51,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:51,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375719302] [2024-06-03 19:25:51,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375719302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:51,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:51,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354018038] [2024-06-03 19:25:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:51,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:51,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:51,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 4197 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 19:25:51,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:51,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:51,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:52,835 INFO L124 PetriNetUnfolderBase]: 3758/5688 cut-off events. [2024-06-03 19:25:52,836 INFO L125 PetriNetUnfolderBase]: For 1273220/1273220 co-relation queries the response was YES. [2024-06-03 19:25:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53054 conditions, 5688 events. 3758/5688 cut-off events. For 1273220/1273220 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 889 based on Foata normal form. 3/5689 useless extension candidates. Maximal degree in co-relation 52889. Up to 5544 conditions per place. [2024-06-03 19:25:52,909 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 421 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-03 19:25:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 484 transitions, 5685 flow [2024-06-03 19:25:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:25:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:25:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-03 19:25:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-03 19:25:52,911 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 4197 flow. Second operand 10 states and 159 transitions. [2024-06-03 19:25:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 484 transitions, 5685 flow [2024-06-03 19:25:55,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 484 transitions, 5626 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:25:55,371 INFO L231 Difference]: Finished difference. Result has 364 places, 463 transitions, 4575 flow [2024-06-03 19:25:55,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=364, PETRI_TRANSITIONS=463} [2024-06-03 19:25:55,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-03 19:25:55,371 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 463 transitions, 4575 flow [2024-06-03 19:25:55,371 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 19:25:55,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:55,371 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 19:25:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:25:55,372 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1227008082, now seen corresponding path program 7 times [2024-06-03 19:25:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842883602] [2024-06-03 19:25:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:55,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842883602] [2024-06-03 19:25:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842883602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:56,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414479458] [2024-06-03 19:25:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:56,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:56,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:25:56,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 463 transitions, 4575 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 19:25:56,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:56,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:25:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:57,762 INFO L124 PetriNetUnfolderBase]: 3755/5684 cut-off events. [2024-06-03 19:25:57,762 INFO L125 PetriNetUnfolderBase]: For 1278931/1278931 co-relation queries the response was YES. [2024-06-03 19:25:57,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54026 conditions, 5684 events. 3755/5684 cut-off events. For 1278931/1278931 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30717 event pairs, 903 based on Foata normal form. 1/5683 useless extension candidates. Maximal degree in co-relation 53856. Up to 5641 conditions per place. [2024-06-03 19:25:58,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 32 changer transitions 0/484 dead transitions. [2024-06-03 19:25:58,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 484 transitions, 5714 flow [2024-06-03 19:25:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 19:25:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-03 19:25:58,002 INFO L175 Difference]: Start difference. First operand has 364 places, 463 transitions, 4575 flow. Second operand 9 states and 135 transitions. [2024-06-03 19:25:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 484 transitions, 5714 flow [2024-06-03 19:26:00,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 484 transitions, 5609 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-03 19:26:00,913 INFO L231 Difference]: Finished difference. Result has 373 places, 473 transitions, 4720 flow [2024-06-03 19:26:00,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=373, PETRI_TRANSITIONS=473} [2024-06-03 19:26:00,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-03 19:26:00,913 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 473 transitions, 4720 flow [2024-06-03 19:26:00,914 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 19:26:00,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:00,914 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 19:26:00,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:26:00,914 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:00,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash -628332448, now seen corresponding path program 1 times [2024-06-03 19:26:00,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:00,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689415971] [2024-06-03 19:26:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:02,000 INFO 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 19:26:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689415971] [2024-06-03 19:26:02,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689415971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791513664] [2024-06-03 19:26:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:02,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:02,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 473 transitions, 4720 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 19:26:02,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:02,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:02,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:03,697 INFO L124 PetriNetUnfolderBase]: 3776/5715 cut-off events. [2024-06-03 19:26:03,698 INFO L125 PetriNetUnfolderBase]: For 1321019/1321019 co-relation queries the response was YES. [2024-06-03 19:26:03,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54781 conditions, 5715 events. 3776/5715 cut-off events. For 1321019/1321019 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30870 event pairs, 860 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54607. Up to 5632 conditions per place. [2024-06-03 19:26:03,776 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 472 selfloop transitions, 25 changer transitions 0/500 dead transitions. [2024-06-03 19:26:03,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 500 transitions, 6102 flow [2024-06-03 19:26:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:26:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:26:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 19:26:03,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:26:03,777 INFO L175 Difference]: Start difference. First operand has 373 places, 473 transitions, 4720 flow. Second operand 9 states and 144 transitions. [2024-06-03 19:26:03,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 500 transitions, 6102 flow [2024-06-03 19:26:07,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 500 transitions, 6007 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:26:07,289 INFO L231 Difference]: Finished difference. Result has 378 places, 477 transitions, 4784 flow [2024-06-03 19:26:07,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4625, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4784, PETRI_PLACES=378, PETRI_TRANSITIONS=477} [2024-06-03 19:26:07,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 19:26:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 477 transitions, 4784 flow [2024-06-03 19:26:07,291 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 19:26:07,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:07,292 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 19:26:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:26:07,293 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:07,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1958602178, now seen corresponding path program 2 times [2024-06-03 19:26:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104975437] [2024-06-03 19:26:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:08,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104975437] [2024-06-03 19:26:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104975437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:08,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:08,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299513866] [2024-06-03 19:26:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:08,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:08,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 477 transitions, 4784 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 19:26:08,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:08,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:08,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:10,089 INFO L124 PetriNetUnfolderBase]: 3771/5708 cut-off events. [2024-06-03 19:26:10,089 INFO L125 PetriNetUnfolderBase]: For 1330016/1330016 co-relation queries the response was YES. [2024-06-03 19:26:10,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 5708 events. 3771/5708 cut-off events. For 1330016/1330016 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30902 event pairs, 901 based on Foata normal form. 2/5708 useless extension candidates. Maximal degree in co-relation 54637. Up to 5654 conditions per place. [2024-06-03 19:26:10,169 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 470 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-03 19:26:10,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 494 transitions, 5808 flow [2024-06-03 19:26:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:26:10,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:26:10,170 INFO L175 Difference]: Start difference. First operand has 378 places, 477 transitions, 4784 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:26:10,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 494 transitions, 5808 flow [2024-06-03 19:26:13,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 494 transitions, 5694 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:13,484 INFO L231 Difference]: Finished difference. Result has 381 places, 477 transitions, 4717 flow [2024-06-03 19:26:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4717, PETRI_PLACES=381, PETRI_TRANSITIONS=477} [2024-06-03 19:26:13,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-03 19:26:13,484 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 477 transitions, 4717 flow [2024-06-03 19:26:13,484 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 19:26:13,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:13,485 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 19:26:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:26:13,485 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -510184318, now seen corresponding path program 3 times [2024-06-03 19:26:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:13,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281584081] [2024-06-03 19:26:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:14,529 INFO 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 19:26:14,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:14,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281584081] [2024-06-03 19:26:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281584081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:14,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438933852] [2024-06-03 19:26:14,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:14,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:14,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 477 transitions, 4717 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 19:26:14,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:14,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:14,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:16,214 INFO L124 PetriNetUnfolderBase]: 3779/5720 cut-off events. [2024-06-03 19:26:16,214 INFO L125 PetriNetUnfolderBase]: For 1352411/1352411 co-relation queries the response was YES. [2024-06-03 19:26:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55003 conditions, 5720 events. 3779/5720 cut-off events. For 1352411/1352411 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30964 event pairs, 902 based on Foata normal form. 2/5720 useless extension candidates. Maximal degree in co-relation 54825. Up to 5645 conditions per place. [2024-06-03 19:26:16,295 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 37 changer transitions 0/493 dead transitions. [2024-06-03 19:26:16,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 493 transitions, 5785 flow [2024-06-03 19:26:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:26:16,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:26:16,296 INFO L175 Difference]: Start difference. First operand has 381 places, 477 transitions, 4717 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:26:16,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 493 transitions, 5785 flow [2024-06-03 19:26:20,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 5738 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:26:20,165 INFO L231 Difference]: Finished difference. Result has 382 places, 479 transitions, 4807 flow [2024-06-03 19:26:20,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=382, PETRI_TRANSITIONS=479} [2024-06-03 19:26:20,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-03 19:26:20,167 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 479 transitions, 4807 flow [2024-06-03 19:26:20,167 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 19:26:20,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:20,168 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 19:26:20,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:26:20,168 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:20,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -520968498, now seen corresponding path program 4 times [2024-06-03 19:26:20,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914943588] [2024-06-03 19:26:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:21,038 INFO 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 19:26:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914943588] [2024-06-03 19:26:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914943588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:21,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651396463] [2024-06-03 19:26:21,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:21,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:21,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 479 transitions, 4807 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 19:26:21,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:21,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:21,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:22,598 INFO L124 PetriNetUnfolderBase]: 3774/5714 cut-off events. [2024-06-03 19:26:22,598 INFO L125 PetriNetUnfolderBase]: For 1359010/1359012 co-relation queries the response was YES. [2024-06-03 19:26:22,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55039 conditions, 5714 events. 3774/5714 cut-off events. For 1359010/1359012 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30954 event pairs, 912 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 54860. Up to 5638 conditions per place. [2024-06-03 19:26:22,679 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 37 changer transitions 0/492 dead transitions. [2024-06-03 19:26:22,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 492 transitions, 5869 flow [2024-06-03 19:26:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:26:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:26:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 19:26:22,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:26:22,680 INFO L175 Difference]: Start difference. First operand has 382 places, 479 transitions, 4807 flow. Second operand 8 states and 126 transitions. [2024-06-03 19:26:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 492 transitions, 5869 flow [2024-06-03 19:26:26,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 492 transitions, 5748 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:26,914 INFO L231 Difference]: Finished difference. Result has 384 places, 481 transitions, 4827 flow [2024-06-03 19:26:26,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4827, PETRI_PLACES=384, PETRI_TRANSITIONS=481} [2024-06-03 19:26:26,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-03 19:26:26,915 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 481 transitions, 4827 flow [2024-06-03 19:26:26,915 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 19:26:26,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:26,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:26,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:26:26,916 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:26,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -232556223, now seen corresponding path program 1 times [2024-06-03 19:26:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:26,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264274992] [2024-06-03 19:26:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:27,969 INFO 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 19:26:27,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:27,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264274992] [2024-06-03 19:26:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264274992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:27,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:27,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705546161] [2024-06-03 19:26:27,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:27,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:27,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:28,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:28,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 481 transitions, 4827 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 19:26:28,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:28,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:28,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:29,700 INFO L124 PetriNetUnfolderBase]: 3787/5731 cut-off events. [2024-06-03 19:26:29,700 INFO L125 PetriNetUnfolderBase]: For 1379495/1379495 co-relation queries the response was YES. [2024-06-03 19:26:29,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55540 conditions, 5731 events. 3787/5731 cut-off events. For 1379495/1379495 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30997 event pairs, 872 based on Foata normal form. 1/5730 useless extension candidates. Maximal degree in co-relation 55360. Up to 5584 conditions per place. [2024-06-03 19:26:29,784 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 63 changer transitions 0/529 dead transitions. [2024-06-03 19:26:29,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 529 transitions, 6373 flow [2024-06-03 19:26:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:26:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:26:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 19:26:29,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-03 19:26:29,785 INFO L175 Difference]: Start difference. First operand has 384 places, 481 transitions, 4827 flow. Second operand 11 states and 186 transitions. [2024-06-03 19:26:29,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 529 transitions, 6373 flow [2024-06-03 19:26:34,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 529 transitions, 6248 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:34,477 INFO L231 Difference]: Finished difference. Result has 390 places, 491 transitions, 5017 flow [2024-06-03 19:26:34,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5017, PETRI_PLACES=390, PETRI_TRANSITIONS=491} [2024-06-03 19:26:34,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 19:26:34,477 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 491 transitions, 5017 flow [2024-06-03 19:26:34,477 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 19:26:34,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:34,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:34,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:26:34,478 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:34,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash -226842303, now seen corresponding path program 2 times [2024-06-03 19:26:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:34,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542824285] [2024-06-03 19:26:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:34,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:35,495 INFO 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 19:26:35,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542824285] [2024-06-03 19:26:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542824285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:35,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355036260] [2024-06-03 19:26:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:35,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:35,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 491 transitions, 5017 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 19:26:35,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:35,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:35,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:37,262 INFO L124 PetriNetUnfolderBase]: 3792/5738 cut-off events. [2024-06-03 19:26:37,262 INFO L125 PetriNetUnfolderBase]: For 1404499/1404499 co-relation queries the response was YES. [2024-06-03 19:26:37,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56296 conditions, 5738 events. 3792/5738 cut-off events. For 1404499/1404499 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31086 event pairs, 867 based on Foata normal form. 1/5737 useless extension candidates. Maximal degree in co-relation 56114. Up to 5590 conditions per place. [2024-06-03 19:26:37,351 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 65 changer transitions 0/531 dead transitions. [2024-06-03 19:26:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 531 transitions, 6484 flow [2024-06-03 19:26:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:26:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:26:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-03 19:26:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:26:37,353 INFO L175 Difference]: Start difference. First operand has 390 places, 491 transitions, 5017 flow. Second operand 13 states and 208 transitions. [2024-06-03 19:26:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 531 transitions, 6484 flow [2024-06-03 19:26:40,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 531 transitions, 6287 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-03 19:26:40,453 INFO L231 Difference]: Finished difference. Result has 396 places, 494 transitions, 5028 flow [2024-06-03 19:26:40,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4856, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5028, PETRI_PLACES=396, PETRI_TRANSITIONS=494} [2024-06-03 19:26:40,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-03 19:26:40,454 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 494 transitions, 5028 flow [2024-06-03 19:26:40,454 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 19:26:40,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:40,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:40,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:26:40,454 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:40,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 666746064, now seen corresponding path program 1 times [2024-06-03 19:26:40,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:40,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563110903] [2024-06-03 19:26:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:40,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563110903] [2024-06-03 19:26:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563110903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:41,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77231316] [2024-06-03 19:26:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:41,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:41,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:41,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 494 transitions, 5028 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 19:26:41,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:41,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:41,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:43,022 INFO L124 PetriNetUnfolderBase]: 3802/5752 cut-off events. [2024-06-03 19:26:43,022 INFO L125 PetriNetUnfolderBase]: For 1434867/1434867 co-relation queries the response was YES. [2024-06-03 19:26:43,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 5752 events. 3802/5752 cut-off events. For 1434867/1434867 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31181 event pairs, 869 based on Foata normal form. 2/5752 useless extension candidates. Maximal degree in co-relation 56404. Up to 5674 conditions per place. [2024-06-03 19:26:43,112 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 21 changer transitions 0/528 dead transitions. [2024-06-03 19:26:43,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 528 transitions, 6260 flow [2024-06-03 19:26:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:26:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:26:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:26:43,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:26:43,113 INFO L175 Difference]: Start difference. First operand has 396 places, 494 transitions, 5028 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:26:43,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 528 transitions, 6260 flow [2024-06-03 19:26:46,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 6134 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 19:26:46,961 INFO L231 Difference]: Finished difference. Result has 395 places, 497 transitions, 5048 flow [2024-06-03 19:26:46,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5048, PETRI_PLACES=395, PETRI_TRANSITIONS=497} [2024-06-03 19:26:46,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-03 19:26:46,961 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 497 transitions, 5048 flow [2024-06-03 19:26:46,961 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 19:26:46,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:46,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:46,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:26:46,962 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:46,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079566, now seen corresponding path program 2 times [2024-06-03 19:26:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632925963] [2024-06-03 19:26:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:46,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:47,752 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 19:26:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632925963] [2024-06-03 19:26:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632925963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:47,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343905074] [2024-06-03 19:26:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:47,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:47,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:47,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 497 transitions, 5048 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 19:26:47,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:47,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:47,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:49,331 INFO L124 PetriNetUnfolderBase]: 3828/5788 cut-off events. [2024-06-03 19:26:49,331 INFO L125 PetriNetUnfolderBase]: For 1476318/1476318 co-relation queries the response was YES. [2024-06-03 19:26:49,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57711 conditions, 5788 events. 3828/5788 cut-off events. For 1476318/1476318 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31395 event pairs, 873 based on Foata normal form. 2/5788 useless extension candidates. Maximal degree in co-relation 57526. Up to 5661 conditions per place. [2024-06-03 19:26:49,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 50 changer transitions 0/533 dead transitions. [2024-06-03 19:26:49,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 533 transitions, 6640 flow [2024-06-03 19:26:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:26:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:26:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:26:49,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:26:49,425 INFO L175 Difference]: Start difference. First operand has 395 places, 497 transitions, 5048 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:26:49,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 533 transitions, 6640 flow [2024-06-03 19:26:52,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 533 transitions, 6506 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:26:52,902 INFO L231 Difference]: Finished difference. Result has 397 places, 503 transitions, 5222 flow [2024-06-03 19:26:52,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4914, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5222, PETRI_PLACES=397, PETRI_TRANSITIONS=503} [2024-06-03 19:26:52,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-03 19:26:52,903 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 503 transitions, 5222 flow [2024-06-03 19:26:52,903 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 19:26:52,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:52,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:52,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:26:52,904 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:52,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1561079380, now seen corresponding path program 1 times [2024-06-03 19:26:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74960311] [2024-06-03 19:26:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74960311] [2024-06-03 19:26:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74960311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:53,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:53,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140185387] [2024-06-03 19:26:53,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:53,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:53,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:53,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:53,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:53,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:53,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 503 transitions, 5222 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 19:26:53,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:53,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:53,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:55,287 INFO L124 PetriNetUnfolderBase]: 3867/5842 cut-off events. [2024-06-03 19:26:55,288 INFO L125 PetriNetUnfolderBase]: For 1537046/1537046 co-relation queries the response was YES. [2024-06-03 19:26:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59022 conditions, 5842 events. 3867/5842 cut-off events. For 1537046/1537046 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31689 event pairs, 847 based on Foata normal form. 3/5843 useless extension candidates. Maximal degree in co-relation 58836. Up to 5601 conditions per place. [2024-06-03 19:26:55,377 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 79 changer transitions 0/545 dead transitions. [2024-06-03 19:26:55,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 545 transitions, 6827 flow [2024-06-03 19:26:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:26:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:26:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:26:55,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:26:55,378 INFO L175 Difference]: Start difference. First operand has 397 places, 503 transitions, 5222 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:26:55,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 545 transitions, 6827 flow [2024-06-03 19:26:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 545 transitions, 6661 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:58,854 INFO L231 Difference]: Finished difference. Result has 401 places, 509 transitions, 5358 flow [2024-06-03 19:26:58,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=401, PETRI_TRANSITIONS=509} [2024-06-03 19:26:58,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-03 19:26:58,854 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 509 transitions, 5358 flow [2024-06-03 19:26:58,855 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 19:26:58,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:58,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:58,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:26:58,855 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:26:58,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1383948046, now seen corresponding path program 3 times [2024-06-03 19:26:58,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:58,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844328664] [2024-06-03 19:26:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:58,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:59,694 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 19:26:59,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844328664] [2024-06-03 19:26:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844328664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146532653] [2024-06-03 19:26:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:59,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:26:59,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 509 transitions, 5358 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 19:26:59,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:59,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:26:59,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:01,367 INFO L124 PetriNetUnfolderBase]: 3877/5856 cut-off events. [2024-06-03 19:27:01,367 INFO L125 PetriNetUnfolderBase]: For 1554211/1554211 co-relation queries the response was YES. [2024-06-03 19:27:01,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 5856 events. 3877/5856 cut-off events. For 1554211/1554211 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31839 event pairs, 874 based on Foata normal form. 2/5856 useless extension candidates. Maximal degree in co-relation 59494. Up to 5725 conditions per place. [2024-06-03 19:27:01,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 54 changer transitions 0/544 dead transitions. [2024-06-03 19:27:01,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 544 transitions, 6856 flow [2024-06-03 19:27:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:27:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:27:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-03 19:27:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-03 19:27:01,460 INFO L175 Difference]: Start difference. First operand has 401 places, 509 transitions, 5358 flow. Second operand 11 states and 180 transitions. [2024-06-03 19:27:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 544 transitions, 6856 flow [2024-06-03 19:27:05,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 544 transitions, 6688 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:05,175 INFO L231 Difference]: Finished difference. Result has 407 places, 512 transitions, 5376 flow [2024-06-03 19:27:05,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5376, PETRI_PLACES=407, PETRI_TRANSITIONS=512} [2024-06-03 19:27:05,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-03 19:27:05,176 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 512 transitions, 5376 flow [2024-06-03 19:27:05,176 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 19:27:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:27:05,176 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:05,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 31773368, now seen corresponding path program 2 times [2024-06-03 19:27:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:05,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074043628] [2024-06-03 19:27:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:06,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:06,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074043628] [2024-06-03 19:27:06,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074043628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:06,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:06,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:27:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432990146] [2024-06-03 19:27:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:06,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:27:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:27:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:27:06,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:06,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 512 transitions, 5376 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 19:27:06,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:06,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:07,741 INFO L124 PetriNetUnfolderBase]: 3916/5910 cut-off events. [2024-06-03 19:27:07,741 INFO L125 PetriNetUnfolderBase]: For 1609500/1609500 co-relation queries the response was YES. [2024-06-03 19:27:07,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 5910 events. 3916/5910 cut-off events. For 1609500/1609500 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32091 event pairs, 852 based on Foata normal form. 3/5911 useless extension candidates. Maximal degree in co-relation 60319. Up to 5650 conditions per place. [2024-06-03 19:27:07,832 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 88 changer transitions 0/562 dead transitions. [2024-06-03 19:27:07,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 562 transitions, 7263 flow [2024-06-03 19:27:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:27:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:27:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-03 19:27:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:27:07,836 INFO L175 Difference]: Start difference. First operand has 407 places, 512 transitions, 5376 flow. Second operand 12 states and 204 transitions. [2024-06-03 19:27:07,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 562 transitions, 7263 flow [2024-06-03 19:27:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 562 transitions, 7093 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-03 19:27:12,202 INFO L231 Difference]: Finished difference. Result has 410 places, 518 transitions, 5472 flow [2024-06-03 19:27:12,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5472, PETRI_PLACES=410, PETRI_TRANSITIONS=518} [2024-06-03 19:27:12,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 19:27:12,204 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 518 transitions, 5472 flow [2024-06-03 19:27:12,205 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 19:27:12,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:12,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:27:12,206 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:12,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1383947860, now seen corresponding path program 3 times [2024-06-03 19:27:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178667428] [2024-06-03 19:27:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178667428] [2024-06-03 19:27:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178667428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:13,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:13,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:27:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709881276] [2024-06-03 19:27:13,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:13,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:27:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:27:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:27:13,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:13,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 518 transitions, 5472 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 19:27:13,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:13,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:13,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:14,777 INFO L124 PetriNetUnfolderBase]: 3907/5898 cut-off events. [2024-06-03 19:27:14,777 INFO L125 PetriNetUnfolderBase]: For 1610498/1610498 co-relation queries the response was YES. [2024-06-03 19:27:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 5898 events. 3907/5898 cut-off events. For 1610498/1610498 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31994 event pairs, 848 based on Foata normal form. 3/5899 useless extension candidates. Maximal degree in co-relation 60103. Up to 5643 conditions per place. [2024-06-03 19:27:14,872 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 86 changer transitions 0/562 dead transitions. [2024-06-03 19:27:14,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 562 transitions, 7037 flow [2024-06-03 19:27:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:27:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:27:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-03 19:27:14,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-03 19:27:14,873 INFO L175 Difference]: Start difference. First operand has 410 places, 518 transitions, 5472 flow. Second operand 11 states and 196 transitions. [2024-06-03 19:27:14,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 562 transitions, 7037 flow [2024-06-03 19:27:18,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 562 transitions, 6834 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 19:27:18,951 INFO L231 Difference]: Finished difference. Result has 413 places, 518 transitions, 5447 flow [2024-06-03 19:27:18,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5447, PETRI_PLACES=413, PETRI_TRANSITIONS=518} [2024-06-03 19:27:18,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-03 19:27:18,952 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 518 transitions, 5447 flow [2024-06-03 19:27:18,952 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 19:27:18,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:18,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:27:18,953 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:18,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1649737396, now seen corresponding path program 1 times [2024-06-03 19:27:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701049409] [2024-06-03 19:27:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:20,059 INFO 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 19:27:20,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701049409] [2024-06-03 19:27:20,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701049409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:20,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:27:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365326871] [2024-06-03 19:27:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:27:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:27:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:27:20,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:20,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 518 transitions, 5447 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:20,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:20,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:20,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:21,829 INFO L124 PetriNetUnfolderBase]: 3987/6018 cut-off events. [2024-06-03 19:27:21,829 INFO L125 PetriNetUnfolderBase]: For 1726159/1726159 co-relation queries the response was YES. [2024-06-03 19:27:21,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62954 conditions, 6018 events. 3987/6018 cut-off events. For 1726159/1726159 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32660 event pairs, 732 based on Foata normal form. 2/6018 useless extension candidates. Maximal degree in co-relation 62762. Up to 5549 conditions per place. [2024-06-03 19:27:21,931 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 460 selfloop transitions, 108 changer transitions 0/571 dead transitions. [2024-06-03 19:27:21,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 571 transitions, 7400 flow [2024-06-03 19:27:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:27:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:27:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:27:21,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 19:27:21,933 INFO L175 Difference]: Start difference. First operand has 413 places, 518 transitions, 5447 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:27:21,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 571 transitions, 7400 flow [2024-06-03 19:27:27,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 571 transitions, 7193 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 19:27:27,011 INFO L231 Difference]: Finished difference. Result has 413 places, 522 transitions, 5581 flow [2024-06-03 19:27:27,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5581, PETRI_PLACES=413, PETRI_TRANSITIONS=522} [2024-06-03 19:27:27,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-03 19:27:27,012 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 522 transitions, 5581 flow [2024-06-03 19:27:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:27,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:27,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:27:27,012 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:27,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1642328086, now seen corresponding path program 2 times [2024-06-03 19:27:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:27,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51766831] [2024-06-03 19:27:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51766831] [2024-06-03 19:27:28,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51766831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:28,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:28,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:27:28,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521915345] [2024-06-03 19:27:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:27:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:27:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:27:28,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:28,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 522 transitions, 5581 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:28,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:28,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:28,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:29,922 INFO L124 PetriNetUnfolderBase]: 4080/6157 cut-off events. [2024-06-03 19:27:29,922 INFO L125 PetriNetUnfolderBase]: For 1871768/1871768 co-relation queries the response was YES. [2024-06-03 19:27:29,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66742 conditions, 6157 events. 4080/6157 cut-off events. For 1871768/1871768 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33701 event pairs, 887 based on Foata normal form. 2/6157 useless extension candidates. Maximal degree in co-relation 66548. Up to 5799 conditions per place. [2024-06-03 19:27:30,026 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 105 changer transitions 0/575 dead transitions. [2024-06-03 19:27:30,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 575 transitions, 7582 flow [2024-06-03 19:27:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:27:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:27:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-03 19:27:30,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 19:27:30,027 INFO L175 Difference]: Start difference. First operand has 413 places, 522 transitions, 5581 flow. Second operand 11 states and 201 transitions. [2024-06-03 19:27:30,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 575 transitions, 7582 flow [2024-06-03 19:27:35,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 7394 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:35,301 INFO L231 Difference]: Finished difference. Result has 418 places, 526 transitions, 5708 flow [2024-06-03 19:27:35,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5708, PETRI_PLACES=418, PETRI_TRANSITIONS=526} [2024-06-03 19:27:35,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 19:27:35,302 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 526 transitions, 5708 flow [2024-06-03 19:27:35,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:35,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:35,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:35,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:27:35,303 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:35,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash -226834367, now seen corresponding path program 1 times [2024-06-03 19:27:35,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:35,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209285219] [2024-06-03 19:27:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:35,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:36,547 INFO 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 19:27:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209285219] [2024-06-03 19:27:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209285219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:36,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:36,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:27:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009027832] [2024-06-03 19:27:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:36,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:27:36,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:27:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:27:36,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:36,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 526 transitions, 5708 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:36,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:36,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:38,612 INFO L124 PetriNetUnfolderBase]: 4098/6182 cut-off events. [2024-06-03 19:27:38,612 INFO L125 PetriNetUnfolderBase]: For 1909997/1909997 co-relation queries the response was YES. [2024-06-03 19:27:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67565 conditions, 6182 events. 4098/6182 cut-off events. For 1909997/1909997 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33810 event pairs, 886 based on Foata normal form. 2/6182 useless extension candidates. Maximal degree in co-relation 67369. Up to 5902 conditions per place. [2024-06-03 19:27:38,716 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 104 changer transitions 0/578 dead transitions. [2024-06-03 19:27:38,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 7458 flow [2024-06-03 19:27:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:27:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:27:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-03 19:27:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2024-06-03 19:27:38,718 INFO L175 Difference]: Start difference. First operand has 418 places, 526 transitions, 5708 flow. Second operand 13 states and 216 transitions. [2024-06-03 19:27:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 7458 flow [2024-06-03 19:27:45,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 578 transitions, 7340 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:45,464 INFO L231 Difference]: Finished difference. Result has 426 places, 535 transitions, 6005 flow [2024-06-03 19:27:45,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6005, PETRI_PLACES=426, PETRI_TRANSITIONS=535} [2024-06-03 19:27:45,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-03 19:27:45,465 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 535 transitions, 6005 flow [2024-06-03 19:27:45,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:45,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:45,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:45,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:27:45,465 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:45,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:45,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1642318786, now seen corresponding path program 3 times [2024-06-03 19:27:45,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:45,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330251437] [2024-06-03 19:27:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:45,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:46,569 INFO 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 19:27:46,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:46,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330251437] [2024-06-03 19:27:46,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330251437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:46,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:46,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:27:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728697426] [2024-06-03 19:27:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:27:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:27:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:27:46,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:46,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 535 transitions, 6005 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:46,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:46,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:46,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:48,503 INFO L124 PetriNetUnfolderBase]: 4065/6135 cut-off events. [2024-06-03 19:27:48,503 INFO L125 PetriNetUnfolderBase]: For 1923408/1923408 co-relation queries the response was YES. [2024-06-03 19:27:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66308 conditions, 6135 events. 4065/6135 cut-off events. For 1923408/1923408 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33551 event pairs, 877 based on Foata normal form. 14/6147 useless extension candidates. Maximal degree in co-relation 66109. Up to 5822 conditions per place. [2024-06-03 19:27:48,595 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 474 selfloop transitions, 105 changer transitions 0/582 dead transitions. [2024-06-03 19:27:48,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 582 transitions, 7660 flow [2024-06-03 19:27:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:27:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:27:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-03 19:27:48,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-03 19:27:48,597 INFO L175 Difference]: Start difference. First operand has 426 places, 535 transitions, 6005 flow. Second operand 12 states and 209 transitions. [2024-06-03 19:27:48,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 582 transitions, 7660 flow [2024-06-03 19:27:53,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 7462 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-03 19:27:53,704 INFO L231 Difference]: Finished difference. Result has 430 places, 535 transitions, 6024 flow [2024-06-03 19:27:53,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6024, PETRI_PLACES=430, PETRI_TRANSITIONS=535} [2024-06-03 19:27:53,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 19:27:53,705 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 535 transitions, 6024 flow [2024-06-03 19:27:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:53,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:53,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:27:53,706 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:53,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash -412411128, now seen corresponding path program 4 times [2024-06-03 19:27:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:53,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130705071] [2024-06-03 19:27:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130705071] [2024-06-03 19:27:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130705071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:27:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513526327] [2024-06-03 19:27:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:27:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:27:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:27:54,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:27:54,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 535 transitions, 6024 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 19:27:54,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:54,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:27:54,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:56,516 INFO L124 PetriNetUnfolderBase]: 4129/6226 cut-off events. [2024-06-03 19:27:56,517 INFO L125 PetriNetUnfolderBase]: For 1884871/1884873 co-relation queries the response was YES. [2024-06-03 19:27:56,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68038 conditions, 6226 events. 4129/6226 cut-off events. For 1884871/1884873 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34147 event pairs, 817 based on Foata normal form. 2/6226 useless extension candidates. Maximal degree in co-relation 67837. Up to 5909 conditions per place. [2024-06-03 19:27:56,617 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 63 changer transitions 0/583 dead transitions. [2024-06-03 19:27:56,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 583 transitions, 8168 flow [2024-06-03 19:27:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:27:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:27:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 19:27:56,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-03 19:27:56,618 INFO L175 Difference]: Start difference. First operand has 430 places, 535 transitions, 6024 flow. Second operand 11 states and 186 transitions. [2024-06-03 19:27:56,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 583 transitions, 8168 flow [2024-06-03 19:28:01,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 583 transitions, 7953 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-03 19:28:01,279 INFO L231 Difference]: Finished difference. Result has 430 places, 547 transitions, 6291 flow [2024-06-03 19:28:01,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=430, PETRI_TRANSITIONS=547} [2024-06-03 19:28:01,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 19:28:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 547 transitions, 6291 flow [2024-06-03 19:28:01,280 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 19:28:01,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:01,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:28:01,280 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:01,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -860995574, now seen corresponding path program 5 times [2024-06-03 19:28:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922224689] [2024-06-03 19:28:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:02,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922224689] [2024-06-03 19:28:02,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922224689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:02,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:02,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132775817] [2024-06-03 19:28:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:02,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:02,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 547 transitions, 6291 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 19:28:02,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:02,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:02,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:03,814 INFO L124 PetriNetUnfolderBase]: 4123/6218 cut-off events. [2024-06-03 19:28:03,814 INFO L125 PetriNetUnfolderBase]: For 1898946/1898948 co-relation queries the response was YES. [2024-06-03 19:28:03,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68106 conditions, 6218 events. 4123/6218 cut-off events. For 1898946/1898948 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34058 event pairs, 820 based on Foata normal form. 2/6218 useless extension candidates. Maximal degree in co-relation 67904. Up to 5904 conditions per place. [2024-06-03 19:28:03,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 62 changer transitions 0/575 dead transitions. [2024-06-03 19:28:03,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 575 transitions, 7787 flow [2024-06-03 19:28:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:28:03,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:28:03,917 INFO L175 Difference]: Start difference. First operand has 430 places, 547 transitions, 6291 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:28:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 575 transitions, 7787 flow [2024-06-03 19:28:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 575 transitions, 7486 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:09,574 INFO L231 Difference]: Finished difference. Result has 434 places, 547 transitions, 6120 flow [2024-06-03 19:28:09,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6120, PETRI_PLACES=434, PETRI_TRANSITIONS=547} [2024-06-03 19:28:09,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 19:28:09,575 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 547 transitions, 6120 flow [2024-06-03 19:28:09,575 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 19:28:09,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:09,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:09,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:28:09,575 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:09,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash -866656484, now seen corresponding path program 6 times [2024-06-03 19:28:09,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:09,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723441135] [2024-06-03 19:28:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:09,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:10,390 INFO 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 19:28:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:10,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723441135] [2024-06-03 19:28:10,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723441135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:10,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:10,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:10,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339105780] [2024-06-03 19:28:10,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:10,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:10,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:10,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:10,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 547 transitions, 6120 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 19:28:10,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:10,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:10,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:12,105 INFO L124 PetriNetUnfolderBase]: 4117/6210 cut-off events. [2024-06-03 19:28:12,105 INFO L125 PetriNetUnfolderBase]: For 1904756/1904758 co-relation queries the response was YES. [2024-06-03 19:28:12,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67764 conditions, 6210 events. 4117/6210 cut-off events. For 1904756/1904758 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34030 event pairs, 815 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 67560. Up to 5931 conditions per place. [2024-06-03 19:28:12,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 50 changer transitions 0/578 dead transitions. [2024-06-03 19:28:12,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 578 transitions, 7368 flow [2024-06-03 19:28:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:28:12,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 19:28:12,216 INFO L175 Difference]: Start difference. First operand has 434 places, 547 transitions, 6120 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:28:12,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 578 transitions, 7368 flow [2024-06-03 19:28:16,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 578 transitions, 7208 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 19:28:16,599 INFO L231 Difference]: Finished difference. Result has 435 places, 547 transitions, 6066 flow [2024-06-03 19:28:16,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6066, PETRI_PLACES=435, PETRI_TRANSITIONS=547} [2024-06-03 19:28:16,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 19:28:16,599 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 547 transitions, 6066 flow [2024-06-03 19:28:16,600 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 19:28:16,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:16,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:28:16,600 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:16,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -866805439, now seen corresponding path program 3 times [2024-06-03 19:28:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:16,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124630692] [2024-06-03 19:28:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:17,540 INFO 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 19:28:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124630692] [2024-06-03 19:28:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124630692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658747477] [2024-06-03 19:28:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:17,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:17,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:17,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 547 transitions, 6066 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 19:28:17,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:17,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:17,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:19,242 INFO L124 PetriNetUnfolderBase]: 4130/6228 cut-off events. [2024-06-03 19:28:19,242 INFO L125 PetriNetUnfolderBase]: For 1932714/1932716 co-relation queries the response was YES. [2024-06-03 19:28:19,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 6228 events. 4130/6228 cut-off events. For 1932714/1932716 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 908 based on Foata normal form. 3/6229 useless extension candidates. Maximal degree in co-relation 68035. Up to 6030 conditions per place. [2024-06-03 19:28:19,348 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 98 changer transitions 0/582 dead transitions. [2024-06-03 19:28:19,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 582 transitions, 7730 flow [2024-06-03 19:28:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:28:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:28:19,350 INFO L175 Difference]: Start difference. First operand has 435 places, 547 transitions, 6066 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:28:19,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 582 transitions, 7730 flow [2024-06-03 19:28:23,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 582 transitions, 7592 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:28:23,716 INFO L231 Difference]: Finished difference. Result has 437 places, 555 transitions, 6316 flow [2024-06-03 19:28:23,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=437, PETRI_TRANSITIONS=555} [2024-06-03 19:28:23,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 19:28:23,722 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 555 transitions, 6316 flow [2024-06-03 19:28:23,722 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 19:28:23,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:23,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:23,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:28:23,723 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:23,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:23,723 INFO L85 PathProgramCache]: Analyzing trace with hash 139387752, now seen corresponding path program 1 times [2024-06-03 19:28:23,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:23,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689600453] [2024-06-03 19:28:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:23,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:24,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:24,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689600453] [2024-06-03 19:28:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689600453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:24,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:24,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:24,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423143700] [2024-06-03 19:28:24,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:24,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:24,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 555 transitions, 6316 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 19:28:24,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:24,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:26,492 INFO L124 PetriNetUnfolderBase]: 4160/6270 cut-off events. [2024-06-03 19:28:26,493 INFO L125 PetriNetUnfolderBase]: For 2011525/2011527 co-relation queries the response was YES. [2024-06-03 19:28:26,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69320 conditions, 6270 events. 4160/6270 cut-off events. For 2011525/2011527 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34398 event pairs, 836 based on Foata normal form. 6/6274 useless extension candidates. Maximal degree in co-relation 69113. Up to 6119 conditions per place. [2024-06-03 19:28:26,588 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 551 selfloop transitions, 33 changer transitions 0/587 dead transitions. [2024-06-03 19:28:26,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 587 transitions, 7678 flow [2024-06-03 19:28:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:28:26,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:28:26,589 INFO L175 Difference]: Start difference. First operand has 437 places, 555 transitions, 6316 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:28:26,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 587 transitions, 7678 flow [2024-06-03 19:28:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 587 transitions, 7446 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:30,864 INFO L231 Difference]: Finished difference. Result has 441 places, 558 transitions, 6250 flow [2024-06-03 19:28:30,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6250, PETRI_PLACES=441, PETRI_TRANSITIONS=558} [2024-06-03 19:28:30,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 19:28:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 558 transitions, 6250 flow [2024-06-03 19:28:30,865 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 19:28:30,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:30,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:30,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:28:30,865 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2012946549, now seen corresponding path program 4 times [2024-06-03 19:28:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:30,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066142887] [2024-06-03 19:28:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:30,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:31,815 INFO 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 19:28:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:31,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066142887] [2024-06-03 19:28:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066142887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:31,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895184296] [2024-06-03 19:28:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:31,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:31,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:31,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:31,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:31,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:31,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 558 transitions, 6250 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 19:28:31,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:31,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:31,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:33,536 INFO L124 PetriNetUnfolderBase]: 4165/6277 cut-off events. [2024-06-03 19:28:33,536 INFO L125 PetriNetUnfolderBase]: For 1992336/1992338 co-relation queries the response was YES. [2024-06-03 19:28:33,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69851 conditions, 6277 events. 4165/6277 cut-off events. For 1992336/1992338 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34408 event pairs, 912 based on Foata normal form. 3/6278 useless extension candidates. Maximal degree in co-relation 69642. Up to 6098 conditions per place. [2024-06-03 19:28:33,637 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 94 changer transitions 0/584 dead transitions. [2024-06-03 19:28:33,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 584 transitions, 7507 flow [2024-06-03 19:28:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:28:33,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 19:28:33,639 INFO L175 Difference]: Start difference. First operand has 441 places, 558 transitions, 6250 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:28:33,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 584 transitions, 7507 flow [2024-06-03 19:28:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 584 transitions, 7363 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:38,775 INFO L231 Difference]: Finished difference. Result has 443 places, 561 transitions, 6341 flow [2024-06-03 19:28:38,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6341, PETRI_PLACES=443, PETRI_TRANSITIONS=561} [2024-06-03 19:28:38,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-03 19:28:38,776 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 561 transitions, 6341 flow [2024-06-03 19:28:38,776 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 19:28:38,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:38,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:28:38,777 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:38,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash -866536328, now seen corresponding path program 4 times [2024-06-03 19:28:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174413634] [2024-06-03 19:28:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:39,566 INFO 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 19:28:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174413634] [2024-06-03 19:28:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174413634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:39,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:39,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471558752] [2024-06-03 19:28:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:39,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:39,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:39,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 561 transitions, 6341 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 19:28:39,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:39,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:39,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:41,332 INFO L124 PetriNetUnfolderBase]: 4220/6353 cut-off events. [2024-06-03 19:28:41,332 INFO L125 PetriNetUnfolderBase]: For 2087760/2087762 co-relation queries the response was YES. [2024-06-03 19:28:41,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6353 events. 4220/6353 cut-off events. For 2087760/2087762 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34801 event pairs, 891 based on Foata normal form. 5/6356 useless extension candidates. Maximal degree in co-relation 71172. Up to 5756 conditions per place. [2024-06-03 19:28:41,446 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 162 changer transitions 0/604 dead transitions. [2024-06-03 19:28:41,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 604 transitions, 8765 flow [2024-06-03 19:28:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:28:41,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 19:28:41,447 INFO L175 Difference]: Start difference. First operand has 443 places, 561 transitions, 6341 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:28:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 604 transitions, 8765 flow [2024-06-03 19:28:47,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 604 transitions, 8561 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:47,132 INFO L231 Difference]: Finished difference. Result has 445 places, 570 transitions, 6713 flow [2024-06-03 19:28:47,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6713, PETRI_PLACES=445, PETRI_TRANSITIONS=570} [2024-06-03 19:28:47,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 19:28:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 570 transitions, 6713 flow [2024-06-03 19:28:47,133 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 19:28:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:47,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:28:47,134 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:47,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash 139208820, now seen corresponding path program 7 times [2024-06-03 19:28:47,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:47,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004732409] [2024-06-03 19:28:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:48,003 INFO 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 19:28:48,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:48,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004732409] [2024-06-03 19:28:48,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004732409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:48,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:48,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:48,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012206375] [2024-06-03 19:28:48,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:48,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:48,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 570 transitions, 6713 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 19:28:48,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:48,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:49,696 INFO L124 PetriNetUnfolderBase]: 4254/6400 cut-off events. [2024-06-03 19:28:49,697 INFO L125 PetriNetUnfolderBase]: For 2144338/2144340 co-relation queries the response was YES. [2024-06-03 19:28:49,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73391 conditions, 6400 events. 4254/6400 cut-off events. For 2144338/2144340 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35078 event pairs, 844 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 73180. Up to 5823 conditions per place. [2024-06-03 19:28:49,817 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 151 changer transitions 0/610 dead transitions. [2024-06-03 19:28:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 610 transitions, 9211 flow [2024-06-03 19:28:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:28:49,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 19:28:49,819 INFO L175 Difference]: Start difference. First operand has 445 places, 570 transitions, 6713 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:28:49,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 610 transitions, 9211 flow [2024-06-03 19:28:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 610 transitions, 8974 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:56,452 INFO L231 Difference]: Finished difference. Result has 450 places, 579 transitions, 7144 flow [2024-06-03 19:28:56,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7144, PETRI_PLACES=450, PETRI_TRANSITIONS=579} [2024-06-03 19:28:56,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 19:28:56,453 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 579 transitions, 7144 flow [2024-06-03 19:28:56,453 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 19:28:56,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:56,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:56,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:28:56,453 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:56,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash -857270738, now seen corresponding path program 5 times [2024-06-03 19:28:56,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:56,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699149376] [2024-06-03 19:28:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:56,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:57,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:57,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699149376] [2024-06-03 19:28:57,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699149376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:57,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:57,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:57,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193711558] [2024-06-03 19:28:57,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:57,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:57,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:57,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:57,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:28:57,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 579 transitions, 7144 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 19:28:57,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:57,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:28:57,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:59,175 INFO L124 PetriNetUnfolderBase]: 4293/6454 cut-off events. [2024-06-03 19:28:59,175 INFO L125 PetriNetUnfolderBase]: For 2214172/2214174 co-relation queries the response was YES. [2024-06-03 19:28:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74468 conditions, 6454 events. 4293/6454 cut-off events. For 2214172/2214174 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35396 event pairs, 892 based on Foata normal form. 5/6457 useless extension candidates. Maximal degree in co-relation 74255. Up to 5838 conditions per place. [2024-06-03 19:28:59,280 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 164 changer transitions 0/616 dead transitions. [2024-06-03 19:28:59,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 616 transitions, 9444 flow [2024-06-03 19:28:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:28:59,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:28:59,282 INFO L175 Difference]: Start difference. First operand has 450 places, 579 transitions, 7144 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:28:59,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 616 transitions, 9444 flow [2024-06-03 19:29:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 616 transitions, 9196 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:05,746 INFO L231 Difference]: Finished difference. Result has 455 places, 585 transitions, 7318 flow [2024-06-03 19:29:05,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7318, PETRI_PLACES=455, PETRI_TRANSITIONS=585} [2024-06-03 19:29:05,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-03 19:29:05,746 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 585 transitions, 7318 flow [2024-06-03 19:29:05,747 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 19:29:05,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:05,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:29:05,747 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:05,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash 139525950, now seen corresponding path program 8 times [2024-06-03 19:29:05,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:05,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911176716] [2024-06-03 19:29:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:06,626 INFO 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 19:29:06,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911176716] [2024-06-03 19:29:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911176716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:06,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:06,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966241161] [2024-06-03 19:29:06,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:06,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:06,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:06,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 585 transitions, 7318 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 19:29:06,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:06,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:06,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:08,481 INFO L124 PetriNetUnfolderBase]: 4319/6490 cut-off events. [2024-06-03 19:29:08,481 INFO L125 PetriNetUnfolderBase]: For 2253606/2253608 co-relation queries the response was YES. [2024-06-03 19:29:08,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75578 conditions, 6490 events. 4319/6490 cut-off events. For 2253606/2253608 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35633 event pairs, 861 based on Foata normal form. 2/6490 useless extension candidates. Maximal degree in co-relation 75363. Up to 5902 conditions per place. [2024-06-03 19:29:08,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 155 changer transitions 0/619 dead transitions. [2024-06-03 19:29:08,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 619 transitions, 9644 flow [2024-06-03 19:29:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:29:08,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 19:29:08,593 INFO L175 Difference]: Start difference. First operand has 455 places, 585 transitions, 7318 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:29:08,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 619 transitions, 9644 flow [2024-06-03 19:29:14,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 619 transitions, 9356 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:14,847 INFO L231 Difference]: Finished difference. Result has 459 places, 591 transitions, 7506 flow [2024-06-03 19:29:14,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7030, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7506, PETRI_PLACES=459, PETRI_TRANSITIONS=591} [2024-06-03 19:29:14,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-03 19:29:14,848 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 591 transitions, 7506 flow [2024-06-03 19:29:14,848 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 19:29:14,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:14,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:29:14,849 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:14,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash -857282239, now seen corresponding path program 5 times [2024-06-03 19:29:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509006268] [2024-06-03 19:29:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:15,821 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 19:29:15,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:15,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509006268] [2024-06-03 19:29:15,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509006268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611932607] [2024-06-03 19:29:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:15,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:15,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 591 transitions, 7506 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 19:29:15,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:15,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:17,549 INFO L124 PetriNetUnfolderBase]: 4324/6497 cut-off events. [2024-06-03 19:29:17,550 INFO L125 PetriNetUnfolderBase]: For 2274184/2274186 co-relation queries the response was YES. [2024-06-03 19:29:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75758 conditions, 6497 events. 4324/6497 cut-off events. For 2274184/2274186 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35682 event pairs, 943 based on Foata normal form. 3/6498 useless extension candidates. Maximal degree in co-relation 75542. Up to 6318 conditions per place. [2024-06-03 19:29:17,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 93 changer transitions 0/614 dead transitions. [2024-06-03 19:29:17,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 614 transitions, 8821 flow [2024-06-03 19:29:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:29:17,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 19:29:17,670 INFO L175 Difference]: Start difference. First operand has 459 places, 591 transitions, 7506 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:29:17,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 614 transitions, 8821 flow [2024-06-03 19:29:24,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 614 transitions, 8501 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:24,222 INFO L231 Difference]: Finished difference. Result has 463 places, 594 transitions, 7425 flow [2024-06-03 19:29:24,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7425, PETRI_PLACES=463, PETRI_TRANSITIONS=594} [2024-06-03 19:29:24,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-03 19:29:24,223 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 594 transitions, 7425 flow [2024-06-03 19:29:24,223 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 19:29:24,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:24,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:24,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:29:24,224 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:24,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -857281898, now seen corresponding path program 6 times [2024-06-03 19:29:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291367479] [2024-06-03 19:29:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:25,015 INFO 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 19:29:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291367479] [2024-06-03 19:29:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291367479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942305673] [2024-06-03 19:29:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:25,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:25,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 594 transitions, 7425 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 19:29:25,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:25,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:25,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:26,849 INFO L124 PetriNetUnfolderBase]: 4315/6485 cut-off events. [2024-06-03 19:29:26,850 INFO L125 PetriNetUnfolderBase]: For 2293311/2293313 co-relation queries the response was YES. [2024-06-03 19:29:26,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75134 conditions, 6485 events. 4315/6485 cut-off events. For 2293311/2293313 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35628 event pairs, 905 based on Foata normal form. 5/6488 useless extension candidates. Maximal degree in co-relation 74917. Up to 5874 conditions per place. [2024-06-03 19:29:26,968 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 461 selfloop transitions, 162 changer transitions 0/626 dead transitions. [2024-06-03 19:29:26,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 626 transitions, 9409 flow [2024-06-03 19:29:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:29:26,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:29:26,969 INFO L175 Difference]: Start difference. First operand has 463 places, 594 transitions, 7425 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:29:26,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 626 transitions, 9409 flow [2024-06-03 19:29:33,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 626 transitions, 9181 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:33,285 INFO L231 Difference]: Finished difference. Result has 465 places, 594 transitions, 7527 flow [2024-06-03 19:29:33,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7527, PETRI_PLACES=465, PETRI_TRANSITIONS=594} [2024-06-03 19:29:33,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-03 19:29:33,285 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 594 transitions, 7527 flow [2024-06-03 19:29:33,285 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 19:29:33,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:33,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:29:33,286 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:33,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash -857270552, now seen corresponding path program 2 times [2024-06-03 19:29:33,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035298298] [2024-06-03 19:29:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035298298] [2024-06-03 19:29:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035298298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496505686] [2024-06-03 19:29:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:34,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:34,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 594 transitions, 7527 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 19:29:34,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:34,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:34,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:36,137 INFO L124 PetriNetUnfolderBase]: 4481/6714 cut-off events. [2024-06-03 19:29:36,137 INFO L125 PetriNetUnfolderBase]: For 2540744/2540746 co-relation queries the response was YES. [2024-06-03 19:29:36,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80471 conditions, 6714 events. 4481/6714 cut-off events. For 2540744/2540746 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36881 event pairs, 867 based on Foata normal form. 6/6718 useless extension candidates. Maximal degree in co-relation 80253. Up to 6027 conditions per place. [2024-06-03 19:29:36,254 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 134 changer transitions 0/651 dead transitions. [2024-06-03 19:29:36,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 651 transitions, 10306 flow [2024-06-03 19:29:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:29:36,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 19:29:36,256 INFO L175 Difference]: Start difference. First operand has 465 places, 594 transitions, 7527 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:29:36,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 651 transitions, 10306 flow [2024-06-03 19:29:44,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 651 transitions, 9970 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:44,485 INFO L231 Difference]: Finished difference. Result has 467 places, 614 transitions, 7956 flow [2024-06-03 19:29:44,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7191, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7956, PETRI_PLACES=467, PETRI_TRANSITIONS=614} [2024-06-03 19:29:44,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 19:29:44,486 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 614 transitions, 7956 flow [2024-06-03 19:29:44,486 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 19:29:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:29:44,486 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:44,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -857276504, now seen corresponding path program 9 times [2024-06-03 19:29:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688379313] [2024-06-03 19:29:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:45,258 INFO 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 19:29:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:45,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688379313] [2024-06-03 19:29:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688379313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:45,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831437917] [2024-06-03 19:29:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:45,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:45,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 614 transitions, 7956 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 19:29:45,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:45,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:45,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:47,192 INFO L124 PetriNetUnfolderBase]: 4475/6706 cut-off events. [2024-06-03 19:29:47,192 INFO L125 PetriNetUnfolderBase]: For 2518863/2518865 co-relation queries the response was YES. [2024-06-03 19:29:47,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81335 conditions, 6706 events. 4475/6706 cut-off events. For 2518863/2518865 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36796 event pairs, 872 based on Foata normal form. 2/6706 useless extension candidates. Maximal degree in co-relation 81115. Up to 6121 conditions per place. [2024-06-03 19:29:47,321 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 156 changer transitions 0/641 dead transitions. [2024-06-03 19:29:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 641 transitions, 9908 flow [2024-06-03 19:29:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:29:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:29:47,323 INFO L175 Difference]: Start difference. First operand has 467 places, 614 transitions, 7956 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:29:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 641 transitions, 9908 flow [2024-06-03 19:29:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 641 transitions, 9678 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-03 19:29:53,148 INFO L231 Difference]: Finished difference. Result has 474 places, 614 transitions, 8044 flow [2024-06-03 19:29:53,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8044, PETRI_PLACES=474, PETRI_TRANSITIONS=614} [2024-06-03 19:29:53,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-03 19:29:53,149 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 614 transitions, 8044 flow [2024-06-03 19:29:53,149 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 19:29:53,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:53,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:53,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:29:53,149 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:53,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:53,150 INFO L85 PathProgramCache]: Analyzing trace with hash -857276132, now seen corresponding path program 3 times [2024-06-03 19:29:53,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:53,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9756037] [2024-06-03 19:29:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:53,916 INFO 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 19:29:53,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9756037] [2024-06-03 19:29:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9756037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067198043] [2024-06-03 19:29:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:53,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:29:53,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 614 transitions, 8044 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 19:29:53,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:53,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:29:53,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:55,812 INFO L124 PetriNetUnfolderBase]: 4457/6682 cut-off events. [2024-06-03 19:29:55,812 INFO L125 PetriNetUnfolderBase]: For 2525440/2525442 co-relation queries the response was YES. [2024-06-03 19:29:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80249 conditions, 6682 events. 4457/6682 cut-off events. For 2525440/2525442 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36636 event pairs, 883 based on Foata normal form. 6/6686 useless extension candidates. Maximal degree in co-relation 80026. Up to 6008 conditions per place. [2024-06-03 19:29:55,951 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 516 selfloop transitions, 133 changer transitions 0/652 dead transitions. [2024-06-03 19:29:55,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 652 transitions, 10147 flow [2024-06-03 19:29:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:29:55,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:29:55,952 INFO L175 Difference]: Start difference. First operand has 474 places, 614 transitions, 8044 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:29:55,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 652 transitions, 10147 flow [2024-06-03 19:30:02,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 652 transitions, 9773 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 19:30:02,167 INFO L231 Difference]: Finished difference. Result has 475 places, 614 transitions, 7942 flow [2024-06-03 19:30:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7670, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7942, PETRI_PLACES=475, PETRI_TRANSITIONS=614} [2024-06-03 19:30:02,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 19:30:02,168 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 614 transitions, 7942 flow [2024-06-03 19:30:02,168 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 19:30:02,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:02,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:30:02,169 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:02,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1503767678, now seen corresponding path program 4 times [2024-06-03 19:30:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465895235] [2024-06-03 19:30:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:02,928 INFO 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 19:30:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465895235] [2024-06-03 19:30:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465895235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:02,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:02,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050857299] [2024-06-03 19:30:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:02,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:02,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:03,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:03,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 614 transitions, 7942 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 19:30:03,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:03,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:03,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:05,019 INFO L124 PetriNetUnfolderBase]: 4583/6856 cut-off events. [2024-06-03 19:30:05,020 INFO L125 PetriNetUnfolderBase]: For 2696570/2696572 co-relation queries the response was YES. [2024-06-03 19:30:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83957 conditions, 6856 events. 4583/6856 cut-off events. For 2696570/2696572 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37682 event pairs, 906 based on Foata normal form. 6/6860 useless extension candidates. Maximal degree in co-relation 83733. Up to 6096 conditions per place. [2024-06-03 19:30:05,145 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 141 changer transitions 0/658 dead transitions. [2024-06-03 19:30:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 658 transitions, 10611 flow [2024-06-03 19:30:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:30:05,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 19:30:05,147 INFO L175 Difference]: Start difference. First operand has 475 places, 614 transitions, 7942 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:30:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 658 transitions, 10611 flow [2024-06-03 19:30:12,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 658 transitions, 10345 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:30:12,432 INFO L231 Difference]: Finished difference. Result has 477 places, 623 transitions, 8234 flow [2024-06-03 19:30:12,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8234, PETRI_PLACES=477, PETRI_TRANSITIONS=623} [2024-06-03 19:30:12,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-03 19:30:12,433 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 623 transitions, 8234 flow [2024-06-03 19:30:12,433 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 19:30:12,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:12,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:12,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:30:12,433 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:12,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 338833320, now seen corresponding path program 10 times [2024-06-03 19:30:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:12,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170809235] [2024-06-03 19:30:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:12,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:13,198 INFO 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 19:30:13,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:13,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170809235] [2024-06-03 19:30:13,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170809235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:13,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:13,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:13,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043823317] [2024-06-03 19:30:13,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:13,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:13,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:13,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 623 transitions, 8234 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 19:30:13,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:13,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:13,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:15,258 INFO L124 PetriNetUnfolderBase]: 4641/6936 cut-off events. [2024-06-03 19:30:15,258 INFO L125 PetriNetUnfolderBase]: For 2758291/2758293 co-relation queries the response was YES. [2024-06-03 19:30:15,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86001 conditions, 6936 events. 4641/6936 cut-off events. For 2758291/2758293 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38188 event pairs, 883 based on Foata normal form. 2/6936 useless extension candidates. Maximal degree in co-relation 85776. Up to 6326 conditions per place. [2024-06-03 19:30:15,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 172 changer transitions 0/659 dead transitions. [2024-06-03 19:30:15,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 659 transitions, 10872 flow [2024-06-03 19:30:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:30:15,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:30:15,400 INFO L175 Difference]: Start difference. First operand has 477 places, 623 transitions, 8234 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:30:15,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 659 transitions, 10872 flow [2024-06-03 19:30:22,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 659 transitions, 10627 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-03 19:30:22,870 INFO L231 Difference]: Finished difference. Result has 482 places, 635 transitions, 8695 flow [2024-06-03 19:30:22,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7989, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8695, PETRI_PLACES=482, PETRI_TRANSITIONS=635} [2024-06-03 19:30:22,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-03 19:30:22,871 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 635 transitions, 8695 flow [2024-06-03 19:30:22,871 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 19:30:22,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:22,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:30:22,871 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:22,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 335108856, now seen corresponding path program 7 times [2024-06-03 19:30:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:22,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142390629] [2024-06-03 19:30:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:22,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:23,767 INFO 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 19:30:23,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:23,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142390629] [2024-06-03 19:30:23,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142390629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:23,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:23,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:23,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042635664] [2024-06-03 19:30:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:23,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:23,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:23,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:23,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 635 transitions, 8695 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 19:30:23,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:23,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:23,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:26,146 INFO L124 PetriNetUnfolderBase]: 4680/6989 cut-off events. [2024-06-03 19:30:26,147 INFO L125 PetriNetUnfolderBase]: For 2837313/2837313 co-relation queries the response was YES. [2024-06-03 19:30:26,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86734 conditions, 6989 events. 4680/6989 cut-off events. For 2837313/2837313 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38515 event pairs, 953 based on Foata normal form. 3/6990 useless extension candidates. Maximal degree in co-relation 86508. Up to 6796 conditions per place. [2024-06-03 19:30:26,265 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 597 selfloop transitions, 68 changer transitions 0/668 dead transitions. [2024-06-03 19:30:26,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 668 transitions, 10565 flow [2024-06-03 19:30:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:30:26,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:30:26,266 INFO L175 Difference]: Start difference. First operand has 482 places, 635 transitions, 8695 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:30:26,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 668 transitions, 10565 flow [2024-06-03 19:30:34,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 668 transitions, 10274 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-03 19:30:34,085 INFO L231 Difference]: Finished difference. Result has 487 places, 641 transitions, 8648 flow [2024-06-03 19:30:34,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8648, PETRI_PLACES=487, PETRI_TRANSITIONS=641} [2024-06-03 19:30:34,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-03 19:30:34,085 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 641 transitions, 8648 flow [2024-06-03 19:30:34,085 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 19:30:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:34,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:34,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:30:34,086 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:34,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 338827926, now seen corresponding path program 8 times [2024-06-03 19:30:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186162699] [2024-06-03 19:30:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:34,935 INFO 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 19:30:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186162699] [2024-06-03 19:30:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186162699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:34,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:34,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451884561] [2024-06-03 19:30:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:34,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:34,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:35,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 641 transitions, 8648 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 19:30:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:37,615 INFO L124 PetriNetUnfolderBase]: 4743/7077 cut-off events. [2024-06-03 19:30:37,615 INFO L125 PetriNetUnfolderBase]: For 2943555/2943557 co-relation queries the response was YES. [2024-06-03 19:30:37,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88157 conditions, 7077 events. 4743/7077 cut-off events. For 2943555/2943557 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39040 event pairs, 963 based on Foata normal form. 5/7080 useless extension candidates. Maximal degree in co-relation 87930. Up to 6416 conditions per place. [2024-06-03 19:30:37,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 168 changer transitions 0/681 dead transitions. [2024-06-03 19:30:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 681 transitions, 11544 flow [2024-06-03 19:30:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:30:37,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 19:30:37,738 INFO L175 Difference]: Start difference. First operand has 487 places, 641 transitions, 8648 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:30:37,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 681 transitions, 11544 flow [2024-06-03 19:30:46,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 681 transitions, 11442 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:30:46,505 INFO L231 Difference]: Finished difference. Result has 491 places, 650 transitions, 9056 flow [2024-06-03 19:30:46,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=491, PETRI_TRANSITIONS=650} [2024-06-03 19:30:46,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-03 19:30:46,506 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 650 transitions, 9056 flow [2024-06-03 19:30:46,506 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 19:30:46,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:46,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:46,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:30:46,506 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:46,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash -558369382, now seen corresponding path program 9 times [2024-06-03 19:30:46,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:46,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116685225] [2024-06-03 19:30:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:46,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:47,444 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 19:30:47,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116685225] [2024-06-03 19:30:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116685225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:47,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:47,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:47,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054500948] [2024-06-03 19:30:47,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:47,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:47,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:47,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:47,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:47,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 650 transitions, 9056 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 19:30:47,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:47,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:47,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:50,163 INFO L124 PetriNetUnfolderBase]: 4758/7097 cut-off events. [2024-06-03 19:30:50,164 INFO L125 PetriNetUnfolderBase]: For 2982190/2982190 co-relation queries the response was YES. [2024-06-03 19:30:50,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89098 conditions, 7097 events. 4758/7097 cut-off events. For 2982190/2982190 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39139 event pairs, 965 based on Foata normal form. 3/7098 useless extension candidates. Maximal degree in co-relation 88869. Up to 6927 conditions per place. [2024-06-03 19:30:50,287 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 610 selfloop transitions, 64 changer transitions 0/677 dead transitions. [2024-06-03 19:30:50,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 677 transitions, 10580 flow [2024-06-03 19:30:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:30:50,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:30:50,288 INFO L175 Difference]: Start difference. First operand has 491 places, 650 transitions, 9056 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:30:50,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 677 transitions, 10580 flow [2024-06-03 19:30:58,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 677 transitions, 10333 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:30:58,700 INFO L231 Difference]: Finished difference. Result has 496 places, 653 transitions, 9005 flow [2024-06-03 19:30:58,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9005, PETRI_PLACES=496, PETRI_TRANSITIONS=653} [2024-06-03 19:30:58,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 19:30:58,711 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 653 transitions, 9005 flow [2024-06-03 19:30:58,711 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 19:30:58,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:58,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:30:58,711 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:58,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 989023986, now seen corresponding path program 5 times [2024-06-03 19:30:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863593604] [2024-06-03 19:30:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:59,502 INFO 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 19:30:59,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863593604] [2024-06-03 19:30:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863593604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:59,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:30:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152097256] [2024-06-03 19:30:59,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:59,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:30:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:30:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:30:59,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:30:59,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 653 transitions, 9005 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 19:30:59,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:59,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:30:59,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:02,085 INFO L124 PetriNetUnfolderBase]: 4788/7140 cut-off events. [2024-06-03 19:31:02,085 INFO L125 PetriNetUnfolderBase]: For 3055933/3055935 co-relation queries the response was YES. [2024-06-03 19:31:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89219 conditions, 7140 events. 4788/7140 cut-off events. For 3055933/3055935 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39408 event pairs, 893 based on Foata normal form. 6/7144 useless extension candidates. Maximal degree in co-relation 88989. Up to 6360 conditions per place. [2024-06-03 19:31:02,205 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 535 selfloop transitions, 150 changer transitions 0/688 dead transitions. [2024-06-03 19:31:02,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 688 transitions, 11234 flow [2024-06-03 19:31:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:31:02,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:31:02,207 INFO L175 Difference]: Start difference. First operand has 496 places, 653 transitions, 9005 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:31:02,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 688 transitions, 11234 flow [2024-06-03 19:31:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 688 transitions, 11084 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 19:31:10,707 INFO L231 Difference]: Finished difference. Result has 498 places, 656 transitions, 9231 flow [2024-06-03 19:31:10,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9231, PETRI_PLACES=498, PETRI_TRANSITIONS=656} [2024-06-03 19:31:10,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-03 19:31:10,708 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 656 transitions, 9231 flow [2024-06-03 19:31:10,708 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 19:31:10,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:10,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:10,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:31:10,708 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:10,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash 338827585, now seen corresponding path program 6 times [2024-06-03 19:31:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:10,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494689001] [2024-06-03 19:31:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:10,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494689001] [2024-06-03 19:31:11,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494689001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:11,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:11,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:31:11,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415347400] [2024-06-03 19:31:11,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:11,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:31:11,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:31:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:31:11,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:11,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 656 transitions, 9231 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 19:31:11,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:11,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:14,316 INFO L124 PetriNetUnfolderBase]: 4793/7147 cut-off events. [2024-06-03 19:31:14,316 INFO L125 PetriNetUnfolderBase]: For 3038986/3038988 co-relation queries the response was YES. [2024-06-03 19:31:14,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89963 conditions, 7147 events. 4793/7147 cut-off events. For 3038986/3038988 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39459 event pairs, 1024 based on Foata normal form. 3/7148 useless extension candidates. Maximal degree in co-relation 89732. Up to 6968 conditions per place. [2024-06-03 19:31:14,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 93 changer transitions 0/676 dead transitions. [2024-06-03 19:31:14,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 676 transitions, 10668 flow [2024-06-03 19:31:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:31:14,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-03 19:31:14,443 INFO L175 Difference]: Start difference. First operand has 498 places, 656 transitions, 9231 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:31:14,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 676 transitions, 10668 flow [2024-06-03 19:31:22,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 676 transitions, 10339 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:22,115 INFO L231 Difference]: Finished difference. Result has 501 places, 659 transitions, 9147 flow [2024-06-03 19:31:22,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9147, PETRI_PLACES=501, PETRI_TRANSITIONS=659} [2024-06-03 19:31:22,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-03 19:31:22,116 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 659 transitions, 9147 flow [2024-06-03 19:31:22,116 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 19:31:22,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:22,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:22,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:31:22,117 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:22,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1069293342, now seen corresponding path program 10 times [2024-06-03 19:31:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:22,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655039922] [2024-06-03 19:31:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655039922] [2024-06-03 19:31:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655039922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:23,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:31:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172916580] [2024-06-03 19:31:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:23,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:31:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:31:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:31:23,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:23,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 659 transitions, 9147 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 19:31:23,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:23,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:23,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:25,737 INFO L124 PetriNetUnfolderBase]: 4808/7168 cut-off events. [2024-06-03 19:31:25,738 INFO L125 PetriNetUnfolderBase]: For 3095752/3095754 co-relation queries the response was YES. [2024-06-03 19:31:25,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89660 conditions, 7168 events. 4808/7168 cut-off events. For 3095752/3095754 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39581 event pairs, 969 based on Foata normal form. 5/7171 useless extension candidates. Maximal degree in co-relation 89428. Up to 6493 conditions per place. [2024-06-03 19:31:25,865 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 182 changer transitions 0/690 dead transitions. [2024-06-03 19:31:25,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 690 transitions, 11635 flow [2024-06-03 19:31:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:31:25,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:31:25,866 INFO L175 Difference]: Start difference. First operand has 501 places, 659 transitions, 9147 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:31:25,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 690 transitions, 11635 flow [2024-06-03 19:31:34,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 690 transitions, 11421 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:31:34,675 INFO L231 Difference]: Finished difference. Result has 503 places, 662 transitions, 9347 flow [2024-06-03 19:31:34,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8933, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9347, PETRI_PLACES=503, PETRI_TRANSITIONS=662} [2024-06-03 19:31:34,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-03 19:31:34,675 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 662 transitions, 9347 flow [2024-06-03 19:31:34,676 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 19:31:34,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:34,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:31:34,676 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 338839086, now seen corresponding path program 11 times [2024-06-03 19:31:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315476728] [2024-06-03 19:31:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:35,565 INFO 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 19:31:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315476728] [2024-06-03 19:31:35,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315476728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:35,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:35,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:31:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938756460] [2024-06-03 19:31:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:31:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:31:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:31:35,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:35,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 662 transitions, 9347 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 19:31:35,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:35,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:35,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:38,005 INFO L124 PetriNetUnfolderBase]: 4799/7156 cut-off events. [2024-06-03 19:31:38,005 INFO L125 PetriNetUnfolderBase]: For 3100677/3100679 co-relation queries the response was YES. [2024-06-03 19:31:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89781 conditions, 7156 events. 4799/7156 cut-off events. For 3100677/3100679 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39514 event pairs, 955 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 89548. Up to 6486 conditions per place. [2024-06-03 19:31:38,259 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 175 changer transitions 0/692 dead transitions. [2024-06-03 19:31:38,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 692 transitions, 11825 flow [2024-06-03 19:31:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:31:38,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:31:38,260 INFO L175 Difference]: Start difference. First operand has 503 places, 662 transitions, 9347 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:31:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 692 transitions, 11825 flow [2024-06-03 19:31:46,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 692 transitions, 11468 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:31:46,972 INFO L231 Difference]: Finished difference. Result has 507 places, 662 transitions, 9346 flow [2024-06-03 19:31:46,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8990, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9346, PETRI_PLACES=507, PETRI_TRANSITIONS=662} [2024-06-03 19:31:46,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-03 19:31:46,973 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 662 transitions, 9346 flow [2024-06-03 19:31:46,973 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 19:31:46,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:46,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:31:46,973 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:46,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash 977851369, now seen corresponding path program 7 times [2024-06-03 19:31:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751932469] [2024-06-03 19:31:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:48,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:48,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751932469] [2024-06-03 19:31:48,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751932469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:48,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:48,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:31:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910562544] [2024-06-03 19:31:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:31:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:31:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:31:48,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:48,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 662 transitions, 9346 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 19:31:48,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:48,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:48,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:50,814 INFO L124 PetriNetUnfolderBase]: 4804/7162 cut-off events. [2024-06-03 19:31:50,814 INFO L125 PetriNetUnfolderBase]: For 3115434/3115434 co-relation queries the response was YES. [2024-06-03 19:31:50,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89909 conditions, 7162 events. 4804/7162 cut-off events. For 3115434/3115434 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39502 event pairs, 1031 based on Foata normal form. 1/7161 useless extension candidates. Maximal degree in co-relation 89675. Up to 7090 conditions per place. [2024-06-03 19:31:50,955 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 644 selfloop transitions, 36 changer transitions 0/683 dead transitions. [2024-06-03 19:31:50,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 683 transitions, 10790 flow [2024-06-03 19:31:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:31:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:31:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-03 19:31:50,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-03 19:31:50,956 INFO L175 Difference]: Start difference. First operand has 507 places, 662 transitions, 9346 flow. Second operand 10 states and 153 transitions. [2024-06-03 19:31:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 683 transitions, 10790 flow [2024-06-03 19:32:00,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 683 transitions, 10432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:32:00,463 INFO L231 Difference]: Finished difference. Result has 509 places, 665 transitions, 9111 flow [2024-06-03 19:32:00,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8988, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9111, PETRI_PLACES=509, PETRI_TRANSITIONS=665} [2024-06-03 19:32:00,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-03 19:32:00,464 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 665 transitions, 9111 flow [2024-06-03 19:32:00,464 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 19:32:00,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:00,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:32:00,464 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:00,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 981672336, now seen corresponding path program 6 times [2024-06-03 19:32:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546768630] [2024-06-03 19:32:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546768630] [2024-06-03 19:32:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546768630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:01,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067410540] [2024-06-03 19:32:01,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 665 transitions, 9111 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 19:32:01,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:01,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:01,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:03,919 INFO L124 PetriNetUnfolderBase]: 4786/7139 cut-off events. [2024-06-03 19:32:03,919 INFO L125 PetriNetUnfolderBase]: For 3137865/3137867 co-relation queries the response was YES. [2024-06-03 19:32:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88515 conditions, 7139 events. 4786/7139 cut-off events. For 3137865/3137867 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39432 event pairs, 888 based on Foata normal form. 6/7143 useless extension candidates. Maximal degree in co-relation 88280. Up to 6372 conditions per place. [2024-06-03 19:32:04,179 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 554 selfloop transitions, 143 changer transitions 0/700 dead transitions. [2024-06-03 19:32:04,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 700 transitions, 11346 flow [2024-06-03 19:32:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:32:04,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:32:04,180 INFO L175 Difference]: Start difference. First operand has 509 places, 665 transitions, 9111 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:32:04,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 700 transitions, 11346 flow [2024-06-03 19:32:13,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 700 transitions, 11221 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:13,469 INFO L231 Difference]: Finished difference. Result has 511 places, 665 transitions, 9278 flow [2024-06-03 19:32:13,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9278, PETRI_PLACES=511, PETRI_TRANSITIONS=665} [2024-06-03 19:32:13,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-03 19:32:13,470 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 665 transitions, 9278 flow [2024-06-03 19:32:13,470 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 19:32:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:32:13,470 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:13,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash 977941734, now seen corresponding path program 11 times [2024-06-03 19:32:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139016238] [2024-06-03 19:32:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:14,320 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 19:32:14,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:14,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139016238] [2024-06-03 19:32:14,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139016238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:14,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:14,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:14,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848454326] [2024-06-03 19:32:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:14,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:14,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 665 transitions, 9278 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 19:32:14,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:16,837 INFO L124 PetriNetUnfolderBase]: 4780/7130 cut-off events. [2024-06-03 19:32:16,837 INFO L125 PetriNetUnfolderBase]: For 3104656/3104656 co-relation queries the response was YES. [2024-06-03 19:32:16,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88760 conditions, 7130 events. 4780/7130 cut-off events. For 3104656/3104656 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39406 event pairs, 1018 based on Foata normal form. 2/7130 useless extension candidates. Maximal degree in co-relation 88524. Up to 7060 conditions per place. [2024-06-03 19:32:16,965 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 647 selfloop transitions, 33 changer transitions 0/683 dead transitions. [2024-06-03 19:32:16,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 683 transitions, 10690 flow [2024-06-03 19:32:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-03 19:32:16,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-03 19:32:16,966 INFO L175 Difference]: Start difference. First operand has 511 places, 665 transitions, 9278 flow. Second operand 9 states and 142 transitions. [2024-06-03 19:32:16,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 683 transitions, 10690 flow [2024-06-03 19:32:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 683 transitions, 10396 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:32:25,619 INFO L231 Difference]: Finished difference. Result has 512 places, 665 transitions, 9056 flow [2024-06-03 19:32:25,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=512, PETRI_TRANSITIONS=665} [2024-06-03 19:32:25,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-03 19:32:25,620 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 665 transitions, 9056 flow [2024-06-03 19:32:25,620 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 19:32:25,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:25,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:32:25,620 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:25,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash 852701280, now seen corresponding path program 12 times [2024-06-03 19:32:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506478894] [2024-06-03 19:32:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:26,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:26,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506478894] [2024-06-03 19:32:26,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506478894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:26,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:26,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:26,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24452928] [2024-06-03 19:32:26,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:26,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:26,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:26,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 665 transitions, 9056 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 19:32:26,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:26,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:26,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:28,877 INFO L124 PetriNetUnfolderBase]: 4774/7123 cut-off events. [2024-06-03 19:32:28,877 INFO L125 PetriNetUnfolderBase]: For 3113427/3113429 co-relation queries the response was YES. [2024-06-03 19:32:28,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88077 conditions, 7123 events. 4774/7123 cut-off events. For 3113427/3113429 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39345 event pairs, 916 based on Foata normal form. 2/7123 useless extension candidates. Maximal degree in co-relation 87840. Up to 6519 conditions per place. [2024-06-03 19:32:29,001 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 170 changer transitions 0/689 dead transitions. [2024-06-03 19:32:29,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 689 transitions, 11152 flow [2024-06-03 19:32:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:32:29,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:32:29,002 INFO L175 Difference]: Start difference. First operand has 512 places, 665 transitions, 9056 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:32:29,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 689 transitions, 11152 flow [2024-06-03 19:32:38,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 689 transitions, 10996 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:38,670 INFO L231 Difference]: Finished difference. Result has 514 places, 665 transitions, 9246 flow [2024-06-03 19:32:38,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8900, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9246, PETRI_PLACES=514, PETRI_TRANSITIONS=665} [2024-06-03 19:32:38,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 19:32:38,671 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 665 transitions, 9246 flow [2024-06-03 19:32:38,671 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 19:32:38,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:38,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:32:38,671 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:38,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 335346006, now seen corresponding path program 12 times [2024-06-03 19:32:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:38,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539792444] [2024-06-03 19:32:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:39,486 INFO 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 19:32:39,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539792444] [2024-06-03 19:32:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539792444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:39,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:39,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069915428] [2024-06-03 19:32:39,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:39,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:39,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:39,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 665 transitions, 9246 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 19:32:39,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:39,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:39,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:42,081 INFO L124 PetriNetUnfolderBase]: 4765/7110 cut-off events. [2024-06-03 19:32:42,081 INFO L125 PetriNetUnfolderBase]: For 3126304/3126304 co-relation queries the response was YES. [2024-06-03 19:32:42,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88090 conditions, 7110 events. 4765/7110 cut-off events. For 3126304/3126304 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39288 event pairs, 973 based on Foata normal form. 3/7111 useless extension candidates. Maximal degree in co-relation 87852. Up to 6915 conditions per place. [2024-06-03 19:32:42,212 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 622 selfloop transitions, 72 changer transitions 0/697 dead transitions. [2024-06-03 19:32:42,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 697 transitions, 10830 flow [2024-06-03 19:32:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:32:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:32:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-03 19:32:42,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-03 19:32:42,213 INFO L175 Difference]: Start difference. First operand has 514 places, 665 transitions, 9246 flow. Second operand 11 states and 184 transitions. [2024-06-03 19:32:42,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 697 transitions, 10830 flow [2024-06-03 19:32:52,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 697 transitions, 10460 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:32:52,201 INFO L231 Difference]: Finished difference. Result has 517 places, 665 transitions, 9026 flow [2024-06-03 19:32:52,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9026, PETRI_PLACES=517, PETRI_TRANSITIONS=665} [2024-06-03 19:32:52,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-03 19:32:52,202 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 665 transitions, 9026 flow [2024-06-03 19:32:52,202 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 19:32:52,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:52,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:52,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:32:52,202 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:52,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:52,203 INFO L85 PathProgramCache]: Analyzing trace with hash 977859305, now seen corresponding path program 2 times [2024-06-03 19:32:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:52,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904083083] [2024-06-03 19:32:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:53,505 INFO 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 19:32:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904083083] [2024-06-03 19:32:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904083083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:53,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:53,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:53,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39881171] [2024-06-03 19:32:53,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:53,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:53,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 665 transitions, 9026 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:53,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:53,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:53,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:56,173 INFO L124 PetriNetUnfolderBase]: 4791/7146 cut-off events. [2024-06-03 19:32:56,173 INFO L125 PetriNetUnfolderBase]: For 3176542/3176542 co-relation queries the response was YES. [2024-06-03 19:32:56,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88633 conditions, 7146 events. 4791/7146 cut-off events. For 3176542/3176542 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39493 event pairs, 974 based on Foata normal form. 2/7146 useless extension candidates. Maximal degree in co-relation 88394. Up to 6944 conditions per place. [2024-06-03 19:32:56,299 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 619 selfloop transitions, 82 changer transitions 0/704 dead transitions. [2024-06-03 19:32:56,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 704 transitions, 11066 flow [2024-06-03 19:32:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:32:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:32:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-03 19:32:56,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:32:56,301 INFO L175 Difference]: Start difference. First operand has 517 places, 665 transitions, 9026 flow. Second operand 12 states and 195 transitions. [2024-06-03 19:32:56,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 704 transitions, 11066 flow [2024-06-03 19:33:06,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 704 transitions, 10886 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 19:33:06,879 INFO L231 Difference]: Finished difference. Result has 519 places, 674 transitions, 9225 flow [2024-06-03 19:33:06,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8851, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9225, PETRI_PLACES=519, PETRI_TRANSITIONS=674} [2024-06-03 19:33:06,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 19:33:06,880 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 674 transitions, 9225 flow [2024-06-03 19:33:06,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:06,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:06,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:06,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 19:33:06,881 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:06,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1080458178, now seen corresponding path program 4 times [2024-06-03 19:33:06,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:06,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537259515] [2024-06-03 19:33:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:07,865 INFO 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 19:33:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:07,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537259515] [2024-06-03 19:33:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537259515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:07,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241395700] [2024-06-03 19:33:07,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:07,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:07,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:07,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 674 transitions, 9225 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:07,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:10,435 INFO L124 PetriNetUnfolderBase]: 4799/7158 cut-off events. [2024-06-03 19:33:10,435 INFO L125 PetriNetUnfolderBase]: For 3216926/3216926 co-relation queries the response was YES. [2024-06-03 19:33:10,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89175 conditions, 7158 events. 4799/7158 cut-off events. For 3216926/3216926 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39550 event pairs, 1010 based on Foata normal form. 2/7158 useless extension candidates. Maximal degree in co-relation 88934. Up to 7049 conditions per place. [2024-06-03 19:33:10,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 640 selfloop transitions, 62 changer transitions 0/705 dead transitions. [2024-06-03 19:33:10,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 705 transitions, 10910 flow [2024-06-03 19:33:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-03 19:33:10,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-03 19:33:10,562 INFO L175 Difference]: Start difference. First operand has 519 places, 674 transitions, 9225 flow. Second operand 10 states and 158 transitions. [2024-06-03 19:33:10,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 705 transitions, 10910 flow [2024-06-03 19:33:20,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 705 transitions, 10741 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:20,401 INFO L231 Difference]: Finished difference. Result has 525 places, 686 transitions, 9474 flow [2024-06-03 19:33:20,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9063, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9474, PETRI_PLACES=525, PETRI_TRANSITIONS=686} [2024-06-03 19:33:20,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-03 19:33:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 686 transitions, 9474 flow [2024-06-03 19:33:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:20,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:20,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:20,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 19:33:20,403 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1069016109, now seen corresponding path program 1 times [2024-06-03 19:33:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405116286] [2024-06-03 19:33:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:21,856 INFO 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 19:33:21,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405116286] [2024-06-03 19:33:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405116286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:21,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:21,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273441265] [2024-06-03 19:33:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:21,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:21,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:21,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:33:21,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 686 transitions, 9474 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:21,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:21,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:33:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:24,515 INFO L124 PetriNetUnfolderBase]: 4462/6764 cut-off events. [2024-06-03 19:33:24,515 INFO L125 PetriNetUnfolderBase]: For 3328590/3328637 co-relation queries the response was YES. [2024-06-03 19:33:24,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87478 conditions, 6764 events. 4462/6764 cut-off events. For 3328590/3328637 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38539 event pairs, 901 based on Foata normal form. 10/6687 useless extension candidates. Maximal degree in co-relation 87232. Up to 6363 conditions per place. [2024-06-03 19:33:24,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 73 changer transitions 0/710 dead transitions. [2024-06-03 19:33:24,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 710 transitions, 10953 flow [2024-06-03 19:33:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:33:24,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:33:24,654 INFO L175 Difference]: Start difference. First operand has 525 places, 686 transitions, 9474 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:33:24,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 710 transitions, 10953 flow [2024-06-03 19:33:35,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 710 transitions, 10826 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:35,231 INFO L231 Difference]: Finished difference. Result has 530 places, 690 transitions, 9644 flow [2024-06-03 19:33:35,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9347, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9644, PETRI_PLACES=530, PETRI_TRANSITIONS=690} [2024-06-03 19:33:35,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-03 19:33:35,232 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 690 transitions, 9644 flow [2024-06-03 19:33:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:35,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:35,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:35,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 19:33:35,233 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:35,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash 346067790, now seen corresponding path program 5 times [2024-06-03 19:33:35,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:35,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105354352] [2024-06-03 19:33:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:36,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:36,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105354352] [2024-06-03 19:33:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105354352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:36,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:36,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8196625] [2024-06-03 19:33:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:36,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:36,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:36,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 690 transitions, 9644 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:36,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:36,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:36,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:39,149 INFO L124 PetriNetUnfolderBase]: 4867/7262 cut-off events. [2024-06-03 19:33:39,149 INFO L125 PetriNetUnfolderBase]: For 3431321/3431321 co-relation queries the response was YES. [2024-06-03 19:33:39,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91069 conditions, 7262 events. 4867/7262 cut-off events. For 3431321/3431321 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40240 event pairs, 980 based on Foata normal form. 12/7272 useless extension candidates. Maximal degree in co-relation 90821. Up to 7046 conditions per place. [2024-06-03 19:33:39,288 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 641 selfloop transitions, 75 changer transitions 0/719 dead transitions. [2024-06-03 19:33:39,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 719 transitions, 11248 flow [2024-06-03 19:33:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 19:33:39,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:33:39,290 INFO L175 Difference]: Start difference. First operand has 530 places, 690 transitions, 9644 flow. Second operand 10 states and 168 transitions. [2024-06-03 19:33:39,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 719 transitions, 11248 flow [2024-06-03 19:33:50,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 719 transitions, 11013 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:50,520 INFO L231 Difference]: Finished difference. Result has 534 places, 692 transitions, 9620 flow [2024-06-03 19:33:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9620, PETRI_PLACES=534, PETRI_TRANSITIONS=692} [2024-06-03 19:33:50,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-03 19:33:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 692 transitions, 9620 flow [2024-06-03 19:33:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:50,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:50,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 19:33:50,521 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:50,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash 346068131, now seen corresponding path program 3 times [2024-06-03 19:33:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:50,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257661890] [2024-06-03 19:33:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:51,941 INFO 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 19:33:51,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257661890] [2024-06-03 19:33:51,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257661890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:51,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:51,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:51,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187367389] [2024-06-03 19:33:51,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:52,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:52,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 692 transitions, 9620 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:52,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:52,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:52,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand