./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.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_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:49:33,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:49:33,357 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:49:33,361 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:49:33,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:49:33,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:49:33,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:49:33,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:49:33,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:49:33,388 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:49:33,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:49:33,388 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:49:33,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:49:33,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:49:33,390 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:49:33,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:49:33,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:49:33,391 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:49:33,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:49:33,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:49:33,392 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:49:33,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:49:33,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:49:33,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:49:33,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:49:33,394 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:49:33,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:49:33,394 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:49:33,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:49:33,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:49:33,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:49:33,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:49:33,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:49:33,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:49:33,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:49:33,396 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:49:33,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:49:33,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:49:33,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:49:33,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:49:33,397 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:49:33,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:49:33,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:49:33,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:49:33,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:49:33,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:49:33,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:49:33,610 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:49:33,611 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:49:33,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml [2024-06-04 14:49:33,773 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:49:33,773 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:49:33,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-04 14:49:34,755 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:49:34,978 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:49:34,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-04 14:49:34,992 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fef43cbb/61f65db1686e4d3592eceeda66e6050d/FLAGbf00857b3 [2024-06-04 14:49:35,004 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fef43cbb/61f65db1686e4d3592eceeda66e6050d [2024-06-04 14:49:35,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:49:35,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:49:35,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:49:35,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:49:35,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:49:35,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:49:33" (1/2) ... [2024-06-04 14:49:35,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2489e535 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:49:35, skipping insertion in model container [2024-06-04 14:49:35,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:49:33" (1/2) ... [2024-06-04 14:49:35,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27ed4d43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:49:35, skipping insertion in model container [2024-06-04 14:49:35,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:49:35" (2/2) ... [2024-06-04 14:49:35,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2489e535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35, skipping insertion in model container [2024-06-04 14:49:35,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:49:35" (2/2) ... [2024-06-04 14:49:35,015 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:49:35,096 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:49:35,097 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-04 14:49:35,097 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-04 14:49:35,097 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-04 14:49:35,097 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:49:35,097 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-04 14:49:35,134 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:49:35,416 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:49:35,424 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:49:35,522 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:49:35,563 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:49:35,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35 WrapperNode [2024-06-04 14:49:35,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:49:35,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:49:35,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:49:35,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:49:35,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,625 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-04 14:49:35,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:49:35,627 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:49:35,627 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:49:35,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:49:35,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,666 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]. [2024-06-04 14:49:35,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,680 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,691 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:49:35,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:49:35,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:49:35,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:49:35,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (1/1) ... [2024-06-04 14:49:35,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:49:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:49:35,734 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) [2024-06-04 14:49:35,754 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 [2024-06-04 14:49:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:49:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:49:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:49:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:49:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:49:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:49:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:49:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:49:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:49:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:49:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:49:35,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:49:35,771 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:49:35,881 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:49:35,883 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:49:36,192 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:49:36,192 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:49:36,346 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:49:36,346 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:49:36,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:49:36 BoogieIcfgContainer [2024-06-04 14:49:36,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:49:36,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:49:36,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:49:36,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:49:36,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:49:33" (1/4) ... [2024-06-04 14:49:36,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff7eab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:49:36, skipping insertion in model container [2024-06-04 14:49:36,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:49:35" (2/4) ... [2024-06-04 14:49:36,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff7eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:49:36, skipping insertion in model container [2024-06-04 14:49:36,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:49:35" (3/4) ... [2024-06-04 14:49:36,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff7eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:49:36, skipping insertion in model container [2024-06-04 14:49:36,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:49:36" (4/4) ... [2024-06-04 14:49:36,377 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_power.opt_rmo.opt.i [2024-06-04 14:49:36,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:49:36,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:49:36,390 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:49:36,424 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:49:36,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:49:36,479 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 14:49:36,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:49:36,481 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 59 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. [2024-06-04 14:49:36,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:49:36,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 14:49:36,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:49:36,501 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1402e584, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:49:36,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:49:36,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:49:36,506 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:49:36,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:49:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:36,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:49:36,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:36,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1569246658, now seen corresponding path program 1 times [2024-06-04 14:49:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662253867] [2024-06-04 14:49:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662253867] [2024-06-04 14:49:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662253867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:37,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:37,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:49:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489314088] [2024-06-04 14:49:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:37,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:49:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:37,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:49:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:49:37,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-04 14:49:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:37,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-04 14:49:37,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:37,805 INFO L124 PetriNetUnfolderBase]: 946/1552 cut-off events. [2024-06-04 14:49:37,805 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 14:49:37,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 1552 events. 946/1552 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7731 event pairs, 638 based on Foata normal form. 1/1484 useless extension candidates. Maximal degree in co-relation 3045. Up to 1431 conditions per place. [2024-06-04 14:49:37,819 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 14:49:37,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-04 14:49:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:49:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:49:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-04 14:49:37,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 14:49:37,829 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-04 14:49:37,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-04 14:49:37,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:37,834 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 14:49:37,835 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} [2024-06-04 14:49:37,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 14:49:37,838 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 14:49:37,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:37,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:37,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:49:37,839 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)] === [2024-06-04 14:49:37,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -512501091, now seen corresponding path program 1 times [2024-06-04 14:49:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:37,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295261774] [2024-06-04 14:49:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295261774] [2024-06-04 14:49:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295261774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:38,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:38,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:49:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328192211] [2024-06-04 14:49:38,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:49:38,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:49:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:49:38,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 14:49:38,422 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) [2024-06-04 14:49:38,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:38,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 14:49:38,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:38,654 INFO L124 PetriNetUnfolderBase]: 1104/1746 cut-off events. [2024-06-04 14:49:38,654 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-04 14:49:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3954 conditions, 1746 events. 1104/1746 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8488 event pairs, 517 based on Foata normal form. 6/1742 useless extension candidates. Maximal degree in co-relation 3939. Up to 1628 conditions per place. [2024-06-04 14:49:38,662 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-04 14:49:38,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 246 flow [2024-06-04 14:49:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:49:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:49:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 14:49:38,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 14:49:38,664 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 99 transitions. [2024-06-04 14:49:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 246 flow [2024-06-04 14:49:38,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:49:38,666 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 14:49:38,666 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} [2024-06-04 14:49:38,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 14:49:38,666 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 14:49:38,667 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) [2024-06-04 14:49:38,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:38,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:38,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:49:38,667 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)] === [2024-06-04 14:49:38,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 689304318, now seen corresponding path program 1 times [2024-06-04 14:49:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:38,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587982695] [2024-06-04 14:49:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587982695] [2024-06-04 14:49:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587982695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:39,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:49:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341730005] [2024-06-04 14:49:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:49:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:49:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:49:39,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 14:49:39,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:39,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:39,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 14:49:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:40,127 INFO L124 PetriNetUnfolderBase]: 1095/1729 cut-off events. [2024-06-04 14:49:40,127 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2024-06-04 14:49:40,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4373 conditions, 1729 events. 1095/1729 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8335 event pairs, 375 based on Foata normal form. 6/1725 useless extension candidates. Maximal degree in co-relation 4356. Up to 1583 conditions per place. [2024-06-04 14:49:40,135 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-04 14:49:40,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 352 flow [2024-06-04 14:49:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 14:49:40,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 14:49:40,137 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 138 transitions. [2024-06-04 14:49:40,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 352 flow [2024-06-04 14:49:40,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 332 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:40,139 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-04 14:49:40,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-04 14:49:40,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-04 14:49:40,140 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-04 14:49:40,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:40,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:40,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:40,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:49:40,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:40,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 592445197, now seen corresponding path program 1 times [2024-06-04 14:49:40,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:40,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330810686] [2024-06-04 14:49:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330810686] [2024-06-04 14:49:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330810686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:40,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:40,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:49:40,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718018610] [2024-06-04 14:49:40,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:40,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:49:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:49:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:49:40,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-04 14:49:40,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:40,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:40,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-04 14:49:40,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:41,146 INFO L124 PetriNetUnfolderBase]: 920/1575 cut-off events. [2024-06-04 14:49:41,146 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-06-04 14:49:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4241 conditions, 1575 events. 920/1575 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8096 event pairs, 378 based on Foata normal form. 2/1571 useless extension candidates. Maximal degree in co-relation 4222. Up to 1382 conditions per place. [2024-06-04 14:49:41,154 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-04 14:49:41,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 323 flow [2024-06-04 14:49:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:49:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:49:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-04 14:49:41,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-04 14:49:41,156 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 104 transitions. [2024-06-04 14:49:41,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 323 flow [2024-06-04 14:49:41,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 296 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:41,169 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-04 14:49:41,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-04 14:49:41,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 14:49:41,182 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-04 14:49:41,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:41,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:41,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:41,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:49:41,183 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)] === [2024-06-04 14:49:41,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2071515686, now seen corresponding path program 1 times [2024-06-04 14:49:41,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:41,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956142650] [2024-06-04 14:49:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:41,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956142650] [2024-06-04 14:49:41,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956142650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:41,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:41,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711221878] [2024-06-04 14:49:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:41,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:41,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:41,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:41,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:41,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:41,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:42,327 INFO L124 PetriNetUnfolderBase]: 1112/1778 cut-off events. [2024-06-04 14:49:42,327 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2024-06-04 14:49:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 1778 events. 1112/1778 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8655 event pairs, 448 based on Foata normal form. 4/1782 useless extension candidates. Maximal degree in co-relation 5294. Up to 1635 conditions per place. [2024-06-04 14:49:42,337 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-04 14:49:42,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 390 flow [2024-06-04 14:49:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-04 14:49:42,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-04 14:49:42,339 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 122 transitions. [2024-06-04 14:49:42,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 390 flow [2024-06-04 14:49:42,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 370 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:42,342 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-04 14:49:42,342 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-04 14:49:42,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-04 14:49:42,343 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-04 14:49:42,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:42,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:42,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:49:42,344 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)] === [2024-06-04 14:49:42,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1658766392, now seen corresponding path program 2 times [2024-06-04 14:49:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042871949] [2024-06-04 14:49:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042871949] [2024-06-04 14:49:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042871949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:42,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:42,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:42,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053153692] [2024-06-04 14:49:42,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:43,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:43,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:43,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:43,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:43,379 INFO L124 PetriNetUnfolderBase]: 1118/1803 cut-off events. [2024-06-04 14:49:43,380 INFO L125 PetriNetUnfolderBase]: For 3963/3967 co-relation queries the response was YES. [2024-06-04 14:49:43,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5822 conditions, 1803 events. 1118/1803 cut-off events. For 3963/3967 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8900 event pairs, 449 based on Foata normal form. 8/1811 useless extension candidates. Maximal degree in co-relation 5800. Up to 1617 conditions per place. [2024-06-04 14:49:43,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 47 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-04 14:49:43,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 428 flow [2024-06-04 14:49:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-04 14:49:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-04 14:49:43,393 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 122 transitions. [2024-06-04 14:49:43,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 428 flow [2024-06-04 14:49:43,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 398 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:43,397 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 272 flow [2024-06-04 14:49:43,397 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-04 14:49:43,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-04 14:49:43,398 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 272 flow [2024-06-04 14:49:43,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:43,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:43,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:43,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:49:43,398 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)] === [2024-06-04 14:49:43,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2071731012, now seen corresponding path program 1 times [2024-06-04 14:49:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:43,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287225630] [2024-06-04 14:49:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:43,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287225630] [2024-06-04 14:49:44,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287225630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:44,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:44,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798522629] [2024-06-04 14:49:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:44,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:44,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:44,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:44,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:44,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:44,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:44,705 INFO L124 PetriNetUnfolderBase]: 1172/1956 cut-off events. [2024-06-04 14:49:44,706 INFO L125 PetriNetUnfolderBase]: For 5263/5263 co-relation queries the response was YES. [2024-06-04 14:49:44,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6546 conditions, 1956 events. 1172/1956 cut-off events. For 5263/5263 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10025 event pairs, 444 based on Foata normal form. 2/1948 useless extension candidates. Maximal degree in co-relation 6523. Up to 1733 conditions per place. [2024-06-04 14:49:44,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-06-04 14:49:44,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 499 flow [2024-06-04 14:49:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 14:49:44,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-04 14:49:44,718 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 272 flow. Second operand 7 states and 136 transitions. [2024-06-04 14:49:44,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 499 flow [2024-06-04 14:49:44,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 450 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:44,722 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 308 flow [2024-06-04 14:49:44,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-04 14:49:44,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-04 14:49:44,723 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 308 flow [2024-06-04 14:49:44,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:44,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:44,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:44,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:49:44,723 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)] === [2024-06-04 14:49:44,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -378344282, now seen corresponding path program 1 times [2024-06-04 14:49:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:44,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686068376] [2024-06-04 14:49:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:44,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686068376] [2024-06-04 14:49:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686068376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818653953] [2024-06-04 14:49:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:45,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:45,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:45,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:45,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:45,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:46,147 INFO L124 PetriNetUnfolderBase]: 1289/2062 cut-off events. [2024-06-04 14:49:46,147 INFO L125 PetriNetUnfolderBase]: For 7568/7568 co-relation queries the response was YES. [2024-06-04 14:49:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7581 conditions, 2062 events. 1289/2062 cut-off events. For 7568/7568 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10331 event pairs, 467 based on Foata normal form. 2/2059 useless extension candidates. Maximal degree in co-relation 7556. Up to 1883 conditions per place. [2024-06-04 14:49:46,161 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-06-04 14:49:46,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 562 flow [2024-06-04 14:49:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-04 14:49:46,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-04 14:49:46,163 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 308 flow. Second operand 7 states and 142 transitions. [2024-06-04 14:49:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 562 flow [2024-06-04 14:49:46,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 524 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:46,168 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 344 flow [2024-06-04 14:49:46,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=270, 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=344, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-04 14:49:46,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-04 14:49:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 344 flow [2024-06-04 14:49:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:46,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:46,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:46,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:49:46,169 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)] === [2024-06-04 14:49:46,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1515713240, now seen corresponding path program 1 times [2024-06-04 14:49:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:46,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843513608] [2024-06-04 14:49:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:46,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:47,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843513608] [2024-06-04 14:49:47,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843513608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:47,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:47,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939318324] [2024-06-04 14:49:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:47,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:47,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:47,807 INFO L124 PetriNetUnfolderBase]: 1154/1917 cut-off events. [2024-06-04 14:49:47,807 INFO L125 PetriNetUnfolderBase]: For 8211/8211 co-relation queries the response was YES. [2024-06-04 14:49:47,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 1917 events. 1154/1917 cut-off events. For 8211/8211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9691 event pairs, 415 based on Foata normal form. 4/1907 useless extension candidates. Maximal degree in co-relation 7136. Up to 1689 conditions per place. [2024-06-04 14:49:47,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-04 14:49:47,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 592 flow [2024-06-04 14:49:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 14:49:47,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 14:49:47,827 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 344 flow. Second operand 8 states and 154 transitions. [2024-06-04 14:49:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 592 flow [2024-06-04 14:49:47,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 87 transitions, 542 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:47,832 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-04 14:49:47,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-04 14:49:47,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-04 14:49:47,832 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-04 14:49:47,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:47,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:47,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:47,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:49:47,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:47,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1158459859, now seen corresponding path program 1 times [2024-06-04 14:49:47,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:47,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585824681] [2024-06-04 14:49:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:47,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:48,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:48,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585824681] [2024-06-04 14:49:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585824681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:48,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:48,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:49:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152936818] [2024-06-04 14:49:48,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:48,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:49:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:49:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:49:48,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:48,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:48,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:48,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:48,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:48,767 INFO L124 PetriNetUnfolderBase]: 1358/2134 cut-off events. [2024-06-04 14:49:48,767 INFO L125 PetriNetUnfolderBase]: For 11517/11517 co-relation queries the response was YES. [2024-06-04 14:49:48,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2134 events. 1358/2134 cut-off events. For 11517/11517 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10347 event pairs, 519 based on Foata normal form. 1/2135 useless extension candidates. Maximal degree in co-relation 8416. Up to 2024 conditions per place. [2024-06-04 14:49:48,779 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-04 14:49:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 541 flow [2024-06-04 14:49:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:49:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:49:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-04 14:49:48,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-04 14:49:48,781 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 5 states and 92 transitions. [2024-06-04 14:49:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 541 flow [2024-06-04 14:49:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 490 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:48,788 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 360 flow [2024-06-04 14:49:48,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-04 14:49:48,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-04 14:49:48,788 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 360 flow [2024-06-04 14:49:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:48,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:48,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:49:48,789 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)] === [2024-06-04 14:49:48,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1159955491, now seen corresponding path program 1 times [2024-06-04 14:49:48,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:48,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517603546] [2024-06-04 14:49:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:49,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:49,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517603546] [2024-06-04 14:49:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517603546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:49,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:49,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:49,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984756407] [2024-06-04 14:49:49,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:49,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:49,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:49,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 360 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) [2024-06-04 14:49:49,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:49,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:49,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:50,234 INFO L124 PetriNetUnfolderBase]: 1460/2265 cut-off events. [2024-06-04 14:49:50,234 INFO L125 PetriNetUnfolderBase]: For 15891/15891 co-relation queries the response was YES. [2024-06-04 14:49:50,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 2265 events. 1460/2265 cut-off events. For 15891/15891 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10919 event pairs, 509 based on Foata normal form. 4/2269 useless extension candidates. Maximal degree in co-relation 9534. Up to 2066 conditions per place. [2024-06-04 14:49:50,246 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 77 selfloop transitions, 18 changer transitions 0/101 dead transitions. [2024-06-04 14:49:50,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 674 flow [2024-06-04 14:49:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:49:50,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 14:49:50,248 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 360 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:49:50,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 674 flow [2024-06-04 14:49:50,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 648 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:50,256 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 443 flow [2024-06-04 14:49:50,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-04 14:49:50,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-04 14:49:50,257 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 443 flow [2024-06-04 14:49:50,257 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) [2024-06-04 14:49:50,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:50,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:49:50,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:50,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash -257538165, now seen corresponding path program 2 times [2024-06-04 14:49:50,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:50,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477248873] [2024-06-04 14:49:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:51,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:51,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477248873] [2024-06-04 14:49:51,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477248873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:51,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:51,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044322829] [2024-06-04 14:49:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:51,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:51,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:51,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:51,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 443 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) [2024-06-04 14:49:51,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:51,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:51,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:51,743 INFO L124 PetriNetUnfolderBase]: 1520/2354 cut-off events. [2024-06-04 14:49:51,743 INFO L125 PetriNetUnfolderBase]: For 19731/19735 co-relation queries the response was YES. [2024-06-04 14:49:51,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10796 conditions, 2354 events. 1520/2354 cut-off events. For 19731/19735 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11395 event pairs, 516 based on Foata normal form. 8/2362 useless extension candidates. Maximal degree in co-relation 10766. Up to 2022 conditions per place. [2024-06-04 14:49:51,757 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 71 selfloop transitions, 42 changer transitions 0/119 dead transitions. [2024-06-04 14:49:51,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 919 flow [2024-06-04 14:49:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:49:51,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-04 14:49:51,759 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 443 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:49:51,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 919 flow [2024-06-04 14:49:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 858 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:51,770 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 630 flow [2024-06-04 14:49:51,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-04 14:49:51,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-04 14:49:51,771 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 630 flow [2024-06-04 14:49:51,771 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) [2024-06-04 14:49:51,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:51,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:51,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:49:51,771 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)] === [2024-06-04 14:49:51,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1938901981, now seen corresponding path program 3 times [2024-06-04 14:49:51,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:51,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850107274] [2024-06-04 14:49:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:51,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850107274] [2024-06-04 14:49:52,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850107274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:52,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:52,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:52,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485185894] [2024-06-04 14:49:52,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:52,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:52,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 630 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) [2024-06-04 14:49:52,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:52,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:52,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:53,326 INFO L124 PetriNetUnfolderBase]: 1515/2357 cut-off events. [2024-06-04 14:49:53,326 INFO L125 PetriNetUnfolderBase]: For 23970/23974 co-relation queries the response was YES. [2024-06-04 14:49:53,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11793 conditions, 2357 events. 1515/2357 cut-off events. For 23970/23974 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11455 event pairs, 516 based on Foata normal form. 6/2363 useless extension candidates. Maximal degree in co-relation 11760. Up to 2133 conditions per place. [2024-06-04 14:49:53,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 27 changer transitions 0/125 dead transitions. [2024-06-04 14:49:53,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 1063 flow [2024-06-04 14:49:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 14:49:53,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-04 14:49:53,340 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 630 flow. Second operand 8 states and 151 transitions. [2024-06-04 14:49:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 1063 flow [2024-06-04 14:49:53,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 125 transitions, 1011 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:53,353 INFO L231 Difference]: Finished difference. Result has 87 places, 101 transitions, 815 flow [2024-06-04 14:49:53,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=815, PETRI_PLACES=87, PETRI_TRANSITIONS=101} [2024-06-04 14:49:53,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-04 14:49:53,354 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 101 transitions, 815 flow [2024-06-04 14:49:53,354 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) [2024-06-04 14:49:53,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:53,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:49:53,354 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:53,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1593627537, now seen corresponding path program 1 times [2024-06-04 14:49:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648993225] [2024-06-04 14:49:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:53,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:53,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648993225] [2024-06-04 14:49:53,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648993225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:53,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:53,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640480956] [2024-06-04 14:49:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:54,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:54,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 101 transitions, 815 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:54,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:54,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:54,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:54,492 INFO L124 PetriNetUnfolderBase]: 1429/2252 cut-off events. [2024-06-04 14:49:54,492 INFO L125 PetriNetUnfolderBase]: For 22187/22187 co-relation queries the response was YES. [2024-06-04 14:49:54,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11220 conditions, 2252 events. 1429/2252 cut-off events. For 22187/22187 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10954 event pairs, 479 based on Foata normal form. 2/2254 useless extension candidates. Maximal degree in co-relation 11182. Up to 2122 conditions per place. [2024-06-04 14:49:54,506 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 98 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-06-04 14:49:54,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1081 flow [2024-06-04 14:49:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 14:49:54,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-04 14:49:54,508 INFO L175 Difference]: Start difference. First operand has 87 places, 101 transitions, 815 flow. Second operand 6 states and 107 transitions. [2024-06-04 14:49:54,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1081 flow [2024-06-04 14:49:54,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 1013 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:54,526 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 805 flow [2024-06-04 14:49:54,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=805, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-04 14:49:54,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-04 14:49:54,528 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 805 flow [2024-06-04 14:49:54,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:54,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:54,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:54,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:49:54,529 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)] === [2024-06-04 14:49:54,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1480550565, now seen corresponding path program 1 times [2024-06-04 14:49:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:54,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26613512] [2024-06-04 14:49:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26613512] [2024-06-04 14:49:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26613512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:55,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:55,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:55,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057769860] [2024-06-04 14:49:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:55,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:55,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:55,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:55,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:55,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 805 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:55,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:55,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:55,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:56,075 INFO L124 PetriNetUnfolderBase]: 1462/2292 cut-off events. [2024-06-04 14:49:56,076 INFO L125 PetriNetUnfolderBase]: For 28478/28492 co-relation queries the response was YES. [2024-06-04 14:49:56,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 2292 events. 1462/2292 cut-off events. For 28478/28492 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11517 event pairs, 327 based on Foata normal form. 4/2290 useless extension candidates. Maximal degree in co-relation 12239. Up to 2057 conditions per place. [2024-06-04 14:49:56,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 15 changer transitions 0/137 dead transitions. [2024-06-04 14:49:56,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 1169 flow [2024-06-04 14:49:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 14:49:56,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 14:49:56,092 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 805 flow. Second operand 8 states and 160 transitions. [2024-06-04 14:49:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 1169 flow [2024-06-04 14:49:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1133 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:56,108 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 844 flow [2024-06-04 14:49:56,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2024-06-04 14:49:56,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 14:49:56,108 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 844 flow [2024-06-04 14:49:56,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:56,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:56,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:49:56,109 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)] === [2024-06-04 14:49:56,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1517963885, now seen corresponding path program 2 times [2024-06-04 14:49:56,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035506879] [2024-06-04 14:49:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035506879] [2024-06-04 14:49:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035506879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:57,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:57,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:57,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714801948] [2024-06-04 14:49:57,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:57,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:49:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:57,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:57,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:49:57,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:57,697 INFO L124 PetriNetUnfolderBase]: 1470/2322 cut-off events. [2024-06-04 14:49:57,698 INFO L125 PetriNetUnfolderBase]: For 32209/32223 co-relation queries the response was YES. [2024-06-04 14:49:57,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12778 conditions, 2322 events. 1470/2322 cut-off events. For 32209/32223 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11719 event pairs, 416 based on Foata normal form. 4/2326 useless extension candidates. Maximal degree in co-relation 12738. Up to 2096 conditions per place. [2024-06-04 14:49:57,711 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-04 14:49:57,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1212 flow [2024-06-04 14:49:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 14:49:57,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 14:49:57,713 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 844 flow. Second operand 8 states and 160 transitions. [2024-06-04 14:49:57,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1212 flow [2024-06-04 14:49:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1155 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:57,735 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 868 flow [2024-06-04 14:49:57,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=868, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-04 14:49:57,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-04 14:49:57,735 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 868 flow [2024-06-04 14:49:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:57,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:57,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:57,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:49:57,736 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)] === [2024-06-04 14:49:57,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1864454309, now seen corresponding path program 1 times [2024-06-04 14:49:57,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:57,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687437449] [2024-06-04 14:49:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:57,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:58,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687437449] [2024-06-04 14:49:58,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687437449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:58,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:58,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127885453] [2024-06-04 14:49:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:59,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:49:59,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 868 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) [2024-06-04 14:49:59,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:59,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:49:59,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:59,611 INFO L124 PetriNetUnfolderBase]: 1593/2470 cut-off events. [2024-06-04 14:49:59,611 INFO L125 PetriNetUnfolderBase]: For 36252/36252 co-relation queries the response was YES. [2024-06-04 14:49:59,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13470 conditions, 2470 events. 1593/2470 cut-off events. For 36252/36252 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12063 event pairs, 439 based on Foata normal form. 2/2472 useless extension candidates. Maximal degree in co-relation 13429. Up to 2283 conditions per place. [2024-06-04 14:49:59,628 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-04 14:49:59,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 147 transitions, 1301 flow [2024-06-04 14:49:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:49:59,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 14:49:59,630 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 868 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:49:59,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 147 transitions, 1301 flow [2024-06-04 14:49:59,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1235 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:59,658 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 929 flow [2024-06-04 14:49:59,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=929, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-04 14:49:59,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-04 14:49:59,658 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 929 flow [2024-06-04 14:49:59,659 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) [2024-06-04 14:49:59,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:59,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:59,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:49:59,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:59,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -676622607, now seen corresponding path program 3 times [2024-06-04 14:49:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53551487] [2024-06-04 14:49:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53551487] [2024-06-04 14:50:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53551487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:00,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:00,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920275046] [2024-06-04 14:50:00,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:00,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:00,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:50:00,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 929 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:00,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:00,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:50:00,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:01,415 INFO L124 PetriNetUnfolderBase]: 1520/2412 cut-off events. [2024-06-04 14:50:01,415 INFO L125 PetriNetUnfolderBase]: For 42074/42088 co-relation queries the response was YES. [2024-06-04 14:50:01,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13924 conditions, 2412 events. 1520/2412 cut-off events. For 42074/42088 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12246 event pairs, 397 based on Foata normal form. 22/2434 useless extension candidates. Maximal degree in co-relation 13881. Up to 2157 conditions per place. [2024-06-04 14:50:01,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 19 changer transitions 0/143 dead transitions. [2024-06-04 14:50:01,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 143 transitions, 1303 flow [2024-06-04 14:50:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 14:50:01,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-04 14:50:01,432 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 929 flow. Second operand 8 states and 157 transitions. [2024-06-04 14:50:01,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 143 transitions, 1303 flow [2024-06-04 14:50:01,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1223 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:01,455 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 943 flow [2024-06-04 14:50:01,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-04 14:50:01,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-04 14:50:01,456 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 943 flow [2024-06-04 14:50:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:50:01,456 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)] === [2024-06-04 14:50:01,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash -253792257, now seen corresponding path program 2 times [2024-06-04 14:50:01,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769629103] [2024-06-04 14:50:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769629103] [2024-06-04 14:50:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769629103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:02,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878851652] [2024-06-04 14:50:02,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:02,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:02,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 943 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) [2024-06-04 14:50:02,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:02,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:02,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:03,228 INFO L124 PetriNetUnfolderBase]: 1638/2545 cut-off events. [2024-06-04 14:50:03,228 INFO L125 PetriNetUnfolderBase]: For 45941/45941 co-relation queries the response was YES. [2024-06-04 14:50:03,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14677 conditions, 2545 events. 1638/2545 cut-off events. For 45941/45941 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12558 event pairs, 439 based on Foata normal form. 2/2547 useless extension candidates. Maximal degree in co-relation 14633. Up to 2285 conditions per place. [2024-06-04 14:50:03,243 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 109 selfloop transitions, 35 changer transitions 0/150 dead transitions. [2024-06-04 14:50:03,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 150 transitions, 1372 flow [2024-06-04 14:50:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:50:03,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:50:03,244 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 943 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:50:03,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 150 transitions, 1372 flow [2024-06-04 14:50:03,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1279 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:03,267 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 994 flow [2024-06-04 14:50:03,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-06-04 14:50:03,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 14:50:03,268 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 994 flow [2024-06-04 14:50:03,268 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) [2024-06-04 14:50:03,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:03,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:50:03,269 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)] === [2024-06-04 14:50:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -253792009, now seen corresponding path program 1 times [2024-06-04 14:50:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554720791] [2024-06-04 14:50:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:04,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554720791] [2024-06-04 14:50:04,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554720791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:04,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:04,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513790225] [2024-06-04 14:50:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:04,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:04,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 994 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) [2024-06-04 14:50:04,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:04,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:04,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:04,889 INFO L124 PetriNetUnfolderBase]: 1661/2578 cut-off events. [2024-06-04 14:50:04,889 INFO L125 PetriNetUnfolderBase]: For 51203/51203 co-relation queries the response was YES. [2024-06-04 14:50:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15218 conditions, 2578 events. 1661/2578 cut-off events. For 51203/51203 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12694 event pairs, 431 based on Foata normal form. 4/2579 useless extension candidates. Maximal degree in co-relation 15174. Up to 2385 conditions per place. [2024-06-04 14:50:04,904 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-06-04 14:50:04,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 156 transitions, 1449 flow [2024-06-04 14:50:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:50:04,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 14:50:04,906 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 994 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:50:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 156 transitions, 1449 flow [2024-06-04 14:50:04,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 156 transitions, 1325 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:04,931 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 1010 flow [2024-06-04 14:50:04,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1010, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2024-06-04 14:50:04,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 14:50:04,932 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 1010 flow [2024-06-04 14:50:04,932 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) [2024-06-04 14:50:04,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:04,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:50:04,933 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:04,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2125713512, now seen corresponding path program 1 times [2024-06-04 14:50:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890552986] [2024-06-04 14:50:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890552986] [2024-06-04 14:50:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890552986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484061119] [2024-06-04 14:50:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:05,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:05,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 1010 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) [2024-06-04 14:50:05,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:05,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:05,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:06,070 INFO L124 PetriNetUnfolderBase]: 1784/2707 cut-off events. [2024-06-04 14:50:06,070 INFO L125 PetriNetUnfolderBase]: For 55556/55556 co-relation queries the response was YES. [2024-06-04 14:50:06,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16181 conditions, 2707 events. 1784/2707 cut-off events. For 55556/55556 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12958 event pairs, 476 based on Foata normal form. 2/2709 useless extension candidates. Maximal degree in co-relation 16134. Up to 2609 conditions per place. [2024-06-04 14:50:06,086 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 127 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2024-06-04 14:50:06,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 149 transitions, 1472 flow [2024-06-04 14:50:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 14:50:06,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:50:06,087 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 1010 flow. Second operand 6 states and 112 transitions. [2024-06-04 14:50:06,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 149 transitions, 1472 flow [2024-06-04 14:50:06,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 149 transitions, 1403 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:06,120 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1058 flow [2024-06-04 14:50:06,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1058, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2024-06-04 14:50:06,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 14:50:06,121 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1058 flow [2024-06-04 14:50:06,121 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) [2024-06-04 14:50:06,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:06,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:50:06,121 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)] === [2024-06-04 14:50:06,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 369892959, now seen corresponding path program 4 times [2024-06-04 14:50:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343280809] [2024-06-04 14:50:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:07,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343280809] [2024-06-04 14:50:07,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343280809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:07,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:07,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069945702] [2024-06-04 14:50:07,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:07,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:50:07,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1058 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:07,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:07,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:50:07,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:07,622 INFO L124 PetriNetUnfolderBase]: 1564/2481 cut-off events. [2024-06-04 14:50:07,622 INFO L125 PetriNetUnfolderBase]: For 60298/60302 co-relation queries the response was YES. [2024-06-04 14:50:07,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15521 conditions, 2481 events. 1564/2481 cut-off events. For 60298/60302 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12730 event pairs, 412 based on Foata normal form. 12/2488 useless extension candidates. Maximal degree in co-relation 15473. Up to 2143 conditions per place. [2024-06-04 14:50:07,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 37 changer transitions 0/157 dead transitions. [2024-06-04 14:50:07,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 157 transitions, 1454 flow [2024-06-04 14:50:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 14:50:07,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-04 14:50:07,640 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1058 flow. Second operand 8 states and 157 transitions. [2024-06-04 14:50:07,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 157 transitions, 1454 flow [2024-06-04 14:50:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 157 transitions, 1420 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:07,673 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1163 flow [2024-06-04 14:50:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-04 14:50:07,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-04 14:50:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1163 flow [2024-06-04 14:50:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:50:07,674 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:07,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash -88332613, now seen corresponding path program 3 times [2024-06-04 14:50:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447829721] [2024-06-04 14:50:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:08,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447829721] [2024-06-04 14:50:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447829721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:08,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645133033] [2024-06-04 14:50:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:08,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:08,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1163 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) [2024-06-04 14:50:08,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:08,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:08,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:09,567 INFO L124 PetriNetUnfolderBase]: 1686/2623 cut-off events. [2024-06-04 14:50:09,567 INFO L125 PetriNetUnfolderBase]: For 64736/64740 co-relation queries the response was YES. [2024-06-04 14:50:09,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 2623 events. 1686/2623 cut-off events. For 64736/64740 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13064 event pairs, 445 based on Foata normal form. 6/2629 useless extension candidates. Maximal degree in co-relation 16342. Up to 2326 conditions per place. [2024-06-04 14:50:09,615 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 42 changer transitions 0/166 dead transitions. [2024-06-04 14:50:09,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 1630 flow [2024-06-04 14:50:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:50:09,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 14:50:09,617 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1163 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:50:09,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 1630 flow [2024-06-04 14:50:09,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 166 transitions, 1491 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:09,660 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1205 flow [2024-06-04 14:50:09,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1205, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-04 14:50:09,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-04 14:50:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1205 flow [2024-06-04 14:50:09,660 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) [2024-06-04 14:50:09,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:09,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:09,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:50:09,661 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)] === [2024-06-04 14:50:09,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 606549687, now seen corresponding path program 2 times [2024-06-04 14:50:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:09,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932284603] [2024-06-04 14:50:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:10,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:10,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932284603] [2024-06-04 14:50:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932284603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081486684] [2024-06-04 14:50:10,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:10,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:10,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1205 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) [2024-06-04 14:50:10,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:10,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:10,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:11,338 INFO L124 PetriNetUnfolderBase]: 1823/2846 cut-off events. [2024-06-04 14:50:11,339 INFO L125 PetriNetUnfolderBase]: For 75050/75054 co-relation queries the response was YES. [2024-06-04 14:50:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18009 conditions, 2846 events. 1823/2846 cut-off events. For 75050/75054 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14482 event pairs, 444 based on Foata normal form. 8/2854 useless extension candidates. Maximal degree in co-relation 17959. Up to 2163 conditions per place. [2024-06-04 14:50:11,358 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 106 selfloop transitions, 70 changer transitions 0/184 dead transitions. [2024-06-04 14:50:11,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 1967 flow [2024-06-04 14:50:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 14:50:11,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 14:50:11,360 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1205 flow. Second operand 9 states and 180 transitions. [2024-06-04 14:50:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 1967 flow [2024-06-04 14:50:11,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 184 transitions, 1819 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:11,415 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1346 flow [2024-06-04 14:50:11,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1346, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-04 14:50:11,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-04 14:50:11,416 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1346 flow [2024-06-04 14:50:11,416 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) [2024-06-04 14:50:11,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:11,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:11,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:50:11,416 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)] === [2024-06-04 14:50:11,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1592078883, now seen corresponding path program 4 times [2024-06-04 14:50:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453931935] [2024-06-04 14:50:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:12,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:12,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453931935] [2024-06-04 14:50:12,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453931935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:12,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:12,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858786269] [2024-06-04 14:50:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:12,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:12,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:12,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1346 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) [2024-06-04 14:50:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:13,394 INFO L124 PetriNetUnfolderBase]: 1834/2867 cut-off events. [2024-06-04 14:50:13,394 INFO L125 PetriNetUnfolderBase]: For 82323/82327 co-relation queries the response was YES. [2024-06-04 14:50:13,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18648 conditions, 2867 events. 1834/2867 cut-off events. For 82323/82327 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14643 event pairs, 481 based on Foata normal form. 6/2873 useless extension candidates. Maximal degree in co-relation 18599. Up to 2466 conditions per place. [2024-06-04 14:50:13,414 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 70 changer transitions 0/189 dead transitions. [2024-06-04 14:50:13,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 189 transitions, 2039 flow [2024-06-04 14:50:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-04 14:50:13,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-04 14:50:13,416 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1346 flow. Second operand 11 states and 208 transitions. [2024-06-04 14:50:13,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 189 transitions, 2039 flow [2024-06-04 14:50:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 189 transitions, 1863 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:13,488 INFO L231 Difference]: Finished difference. Result has 124 places, 152 transitions, 1479 flow [2024-06-04 14:50:13,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1479, PETRI_PLACES=124, PETRI_TRANSITIONS=152} [2024-06-04 14:50:13,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-04 14:50:13,489 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 152 transitions, 1479 flow [2024-06-04 14:50:13,489 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) [2024-06-04 14:50:13,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:13,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:13,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:50:13,489 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)] === [2024-06-04 14:50:13,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 370070899, now seen corresponding path program 5 times [2024-06-04 14:50:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381532324] [2024-06-04 14:50:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381532324] [2024-06-04 14:50:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381532324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:14,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:14,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:14,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791451549] [2024-06-04 14:50:14,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:14,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:14,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 152 transitions, 1479 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) [2024-06-04 14:50:14,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:14,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:14,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:15,303 INFO L124 PetriNetUnfolderBase]: 1829/2860 cut-off events. [2024-06-04 14:50:15,304 INFO L125 PetriNetUnfolderBase]: For 87151/87155 co-relation queries the response was YES. [2024-06-04 14:50:15,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18758 conditions, 2860 events. 1829/2860 cut-off events. For 87151/87155 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14612 event pairs, 481 based on Foata normal form. 6/2866 useless extension candidates. Maximal degree in co-relation 18708. Up to 2558 conditions per place. [2024-06-04 14:50:15,324 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 129 selfloop transitions, 42 changer transitions 0/179 dead transitions. [2024-06-04 14:50:15,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 179 transitions, 1889 flow [2024-06-04 14:50:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:50:15,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:50:15,325 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 1479 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:50:15,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 179 transitions, 1889 flow [2024-06-04 14:50:15,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1741 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:15,410 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1423 flow [2024-06-04 14:50:15,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1423, PETRI_PLACES=127, PETRI_TRANSITIONS=152} [2024-06-04 14:50:15,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 14:50:15,410 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1423 flow [2024-06-04 14:50:15,411 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) [2024-06-04 14:50:15,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:15,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:15,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:50:15,411 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)] === [2024-06-04 14:50:15,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 370077409, now seen corresponding path program 6 times [2024-06-04 14:50:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052342352] [2024-06-04 14:50:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:16,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052342352] [2024-06-04 14:50:16,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052342352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:16,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108142625] [2024-06-04 14:50:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:16,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:16,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:16,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 152 transitions, 1423 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) [2024-06-04 14:50:16,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:16,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:16,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:17,190 INFO L124 PetriNetUnfolderBase]: 1824/2853 cut-off events. [2024-06-04 14:50:17,190 INFO L125 PetriNetUnfolderBase]: For 90991/90995 co-relation queries the response was YES. [2024-06-04 14:50:17,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 2853 events. 1824/2853 cut-off events. For 90991/90995 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14560 event pairs, 481 based on Foata normal form. 6/2859 useless extension candidates. Maximal degree in co-relation 18770. Up to 2524 conditions per place. [2024-06-04 14:50:17,209 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 51 changer transitions 0/183 dead transitions. [2024-06-04 14:50:17,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 183 transitions, 1851 flow [2024-06-04 14:50:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:50:17,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:50:17,211 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1423 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:50:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 183 transitions, 1851 flow [2024-06-04 14:50:17,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 183 transitions, 1682 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:17,294 INFO L231 Difference]: Finished difference. Result has 130 places, 152 transitions, 1364 flow [2024-06-04 14:50:17,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1364, PETRI_PLACES=130, PETRI_TRANSITIONS=152} [2024-06-04 14:50:17,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-04 14:50:17,295 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 152 transitions, 1364 flow [2024-06-04 14:50:17,295 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) [2024-06-04 14:50:17,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:17,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:50:17,295 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)] === [2024-06-04 14:50:17,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 606253017, now seen corresponding path program 3 times [2024-06-04 14:50:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124712237] [2024-06-04 14:50:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:17,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:18,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124712237] [2024-06-04 14:50:18,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124712237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:18,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351215268] [2024-06-04 14:50:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:18,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:18,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:18,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 152 transitions, 1364 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) [2024-06-04 14:50:18,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:18,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:18,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:18,979 INFO L124 PetriNetUnfolderBase]: 1916/3005 cut-off events. [2024-06-04 14:50:18,980 INFO L125 PetriNetUnfolderBase]: For 104090/104094 co-relation queries the response was YES. [2024-06-04 14:50:18,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19912 conditions, 3005 events. 1916/3005 cut-off events. For 104090/104094 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15518 event pairs, 491 based on Foata normal form. 24/3029 useless extension candidates. Maximal degree in co-relation 19859. Up to 2497 conditions per place. [2024-06-04 14:50:18,997 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 65 changer transitions 0/191 dead transitions. [2024-06-04 14:50:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 1911 flow [2024-06-04 14:50:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:50:18,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-04 14:50:18,998 INFO L175 Difference]: Start difference. First operand has 130 places, 152 transitions, 1364 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:50:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 1911 flow [2024-06-04 14:50:19,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 191 transitions, 1761 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:19,068 INFO L231 Difference]: Finished difference. Result has 131 places, 155 transitions, 1419 flow [2024-06-04 14:50:19,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1419, PETRI_PLACES=131, PETRI_TRANSITIONS=155} [2024-06-04 14:50:19,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-04 14:50:19,069 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 155 transitions, 1419 flow [2024-06-04 14:50:19,069 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) [2024-06-04 14:50:19,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:19,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:50:19,070 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:19,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 370077657, now seen corresponding path program 4 times [2024-06-04 14:50:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617101635] [2024-06-04 14:50:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:20,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617101635] [2024-06-04 14:50:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617101635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:20,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:20,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971238956] [2024-06-04 14:50:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:20,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:20,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:20,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 155 transitions, 1419 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) [2024-06-04 14:50:20,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:20,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:20,826 INFO L124 PetriNetUnfolderBase]: 1966/3091 cut-off events. [2024-06-04 14:50:20,827 INFO L125 PetriNetUnfolderBase]: For 114179/114183 co-relation queries the response was YES. [2024-06-04 14:50:20,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 3091 events. 1966/3091 cut-off events. For 114179/114183 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16260 event pairs, 499 based on Foata normal form. 24/3115 useless extension candidates. Maximal degree in co-relation 20682. Up to 2618 conditions per place. [2024-06-04 14:50:20,849 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 130 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-04 14:50:20,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1934 flow [2024-06-04 14:50:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 14:50:20,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-04 14:50:20,851 INFO L175 Difference]: Start difference. First operand has 131 places, 155 transitions, 1419 flow. Second operand 9 states and 176 transitions. [2024-06-04 14:50:20,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1934 flow [2024-06-04 14:50:20,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 188 transitions, 1790 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:20,931 INFO L231 Difference]: Finished difference. Result has 132 places, 156 transitions, 1434 flow [2024-06-04 14:50:20,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1434, PETRI_PLACES=132, PETRI_TRANSITIONS=156} [2024-06-04 14:50:20,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 14:50:20,932 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 156 transitions, 1434 flow [2024-06-04 14:50:20,932 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) [2024-06-04 14:50:20,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:20,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:20,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:50:20,933 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)] === [2024-06-04 14:50:20,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash -883366964, now seen corresponding path program 2 times [2024-06-04 14:50:20,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:20,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783266762] [2024-06-04 14:50:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783266762] [2024-06-04 14:50:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783266762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:21,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:21,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360761426] [2024-06-04 14:50:21,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:21,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:21,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:21,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 156 transitions, 1434 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) [2024-06-04 14:50:21,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:21,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:21,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:22,129 INFO L124 PetriNetUnfolderBase]: 2064/3184 cut-off events. [2024-06-04 14:50:22,130 INFO L125 PetriNetUnfolderBase]: For 110178/110178 co-relation queries the response was YES. [2024-06-04 14:50:22,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21190 conditions, 3184 events. 2064/3184 cut-off events. For 110178/110178 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16311 event pairs, 543 based on Foata normal form. 2/3185 useless extension candidates. Maximal degree in co-relation 21135. Up to 3075 conditions per place. [2024-06-04 14:50:22,152 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2024-06-04 14:50:22,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 167 transitions, 1802 flow [2024-06-04 14:50:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-04 14:50:22,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:50:22,153 INFO L175 Difference]: Start difference. First operand has 132 places, 156 transitions, 1434 flow. Second operand 6 states and 106 transitions. [2024-06-04 14:50:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 167 transitions, 1802 flow [2024-06-04 14:50:22,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 167 transitions, 1666 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:22,252 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1340 flow [2024-06-04 14:50:22,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1340, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-04 14:50:22,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-04 14:50:22,253 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1340 flow [2024-06-04 14:50:22,253 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) [2024-06-04 14:50:22,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:22,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:50:22,253 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)] === [2024-06-04 14:50:22,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2131433384, now seen corresponding path program 1 times [2024-06-04 14:50:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70125241] [2024-06-04 14:50:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70125241] [2024-06-04 14:50:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70125241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:22,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:22,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586523687] [2024-06-04 14:50:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:22,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:22,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:22,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:22,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1340 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:22,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:22,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:22,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:23,324 INFO L124 PetriNetUnfolderBase]: 1865/2967 cut-off events. [2024-06-04 14:50:23,324 INFO L125 PetriNetUnfolderBase]: For 96035/96035 co-relation queries the response was YES. [2024-06-04 14:50:23,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19018 conditions, 2967 events. 1865/2967 cut-off events. For 96035/96035 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15660 event pairs, 455 based on Foata normal form. 1/2968 useless extension candidates. Maximal degree in co-relation 18962. Up to 2817 conditions per place. [2024-06-04 14:50:23,343 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 154 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-04 14:50:23,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1824 flow [2024-06-04 14:50:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 14:50:23,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:50:23,344 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1340 flow. Second operand 6 states and 112 transitions. [2024-06-04 14:50:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1824 flow [2024-06-04 14:50:23,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 175 transitions, 1776 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:23,438 INFO L231 Difference]: Finished difference. Result has 132 places, 162 transitions, 1388 flow [2024-06-04 14:50:23,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1388, PETRI_PLACES=132, PETRI_TRANSITIONS=162} [2024-06-04 14:50:23,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 14:50:23,438 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 162 transitions, 1388 flow [2024-06-04 14:50:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:23,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:23,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:50:23,439 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:23,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash -841355702, now seen corresponding path program 2 times [2024-06-04 14:50:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:23,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252339702] [2024-06-04 14:50:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:24,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:24,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252339702] [2024-06-04 14:50:24,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252339702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:24,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:24,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505734325] [2024-06-04 14:50:24,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:24,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:24,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 162 transitions, 1388 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:24,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:24,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:24,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:24,531 INFO L124 PetriNetUnfolderBase]: 1862/2963 cut-off events. [2024-06-04 14:50:24,531 INFO L125 PetriNetUnfolderBase]: For 100959/100959 co-relation queries the response was YES. [2024-06-04 14:50:24,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19377 conditions, 2963 events. 1862/2963 cut-off events. For 100959/100959 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15622 event pairs, 454 based on Foata normal form. 1/2964 useless extension candidates. Maximal degree in co-relation 19320. Up to 2826 conditions per place. [2024-06-04 14:50:24,553 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 155 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2024-06-04 14:50:24,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 171 transitions, 1742 flow [2024-06-04 14:50:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-04 14:50:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:50:24,554 INFO L175 Difference]: Start difference. First operand has 132 places, 162 transitions, 1388 flow. Second operand 6 states and 106 transitions. [2024-06-04 14:50:24,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 171 transitions, 1742 flow [2024-06-04 14:50:24,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 171 transitions, 1698 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:24,647 INFO L231 Difference]: Finished difference. Result has 136 places, 162 transitions, 1372 flow [2024-06-04 14:50:24,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1372, PETRI_PLACES=136, PETRI_TRANSITIONS=162} [2024-06-04 14:50:24,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 14:50:24,648 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 162 transitions, 1372 flow [2024-06-04 14:50:24,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:24,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:24,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:24,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:50:24,648 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:24,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1437753001, now seen corresponding path program 1 times [2024-06-04 14:50:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:24,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212413216] [2024-06-04 14:50:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:25,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:25,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212413216] [2024-06-04 14:50:25,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212413216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:25,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:25,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:25,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886696480] [2024-06-04 14:50:25,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:25,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:25,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:25,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:25,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 162 transitions, 1372 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:25,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:25,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:25,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:26,609 INFO L124 PetriNetUnfolderBase]: 2031/3191 cut-off events. [2024-06-04 14:50:26,609 INFO L125 PetriNetUnfolderBase]: For 133536/133536 co-relation queries the response was YES. [2024-06-04 14:50:26,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21874 conditions, 3191 events. 2031/3191 cut-off events. For 133536/133536 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16950 event pairs, 501 based on Foata normal form. 16/3202 useless extension candidates. Maximal degree in co-relation 21815. Up to 2891 conditions per place. [2024-06-04 14:50:26,630 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-06-04 14:50:26,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 1936 flow [2024-06-04 14:50:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:50:26,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:50:26,631 INFO L175 Difference]: Start difference. First operand has 136 places, 162 transitions, 1372 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:50:26,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 1936 flow [2024-06-04 14:50:26,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 204 transitions, 1906 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:26,741 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1435 flow [2024-06-04 14:50:26,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1435, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2024-06-04 14:50:26,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 14:50:26,741 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1435 flow [2024-06-04 14:50:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:26,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:26,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:26,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:50:26,741 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)] === [2024-06-04 14:50:26,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash 331805651, now seen corresponding path program 2 times [2024-06-04 14:50:26,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195332653] [2024-06-04 14:50:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195332653] [2024-06-04 14:50:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195332653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:27,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:27,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045057233] [2024-06-04 14:50:27,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:28,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:28,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1435 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:28,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:28,894 INFO L124 PetriNetUnfolderBase]: 2128/3350 cut-off events. [2024-06-04 14:50:28,894 INFO L125 PetriNetUnfolderBase]: For 143900/143900 co-relation queries the response was YES. [2024-06-04 14:50:28,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23159 conditions, 3350 events. 2128/3350 cut-off events. For 143900/143900 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18035 event pairs, 508 based on Foata normal form. 16/3366 useless extension candidates. Maximal degree in co-relation 23099. Up to 3008 conditions per place. [2024-06-04 14:50:28,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-06-04 14:50:28,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 210 transitions, 2070 flow [2024-06-04 14:50:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:50:28,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:50:28,916 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1435 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:50:28,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 210 transitions, 2070 flow [2024-06-04 14:50:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 210 transitions, 2011 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:29,017 INFO L231 Difference]: Finished difference. Result has 144 places, 171 transitions, 1558 flow [2024-06-04 14:50:29,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1558, PETRI_PLACES=144, PETRI_TRANSITIONS=171} [2024-06-04 14:50:29,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-04 14:50:29,017 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 171 transitions, 1558 flow [2024-06-04 14:50:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:29,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:29,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:29,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:50:29,018 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)] === [2024-06-04 14:50:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1974228517, now seen corresponding path program 3 times [2024-06-04 14:50:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218550092] [2024-06-04 14:50:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218550092] [2024-06-04 14:50:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218550092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:30,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198923053] [2024-06-04 14:50:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:30,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:30,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 171 transitions, 1558 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:30,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:30,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:30,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:31,077 INFO L124 PetriNetUnfolderBase]: 2186/3458 cut-off events. [2024-06-04 14:50:31,077 INFO L125 PetriNetUnfolderBase]: For 153570/153570 co-relation queries the response was YES. [2024-06-04 14:50:31,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24026 conditions, 3458 events. 2186/3458 cut-off events. For 153570/153570 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18941 event pairs, 528 based on Foata normal form. 16/3474 useless extension candidates. Maximal degree in co-relation 23964. Up to 3107 conditions per place. [2024-06-04 14:50:31,102 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 166 selfloop transitions, 34 changer transitions 0/210 dead transitions. [2024-06-04 14:50:31,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 210 transitions, 2128 flow [2024-06-04 14:50:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:50:31,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:50:31,103 INFO L175 Difference]: Start difference. First operand has 144 places, 171 transitions, 1558 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:50:31,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 210 transitions, 2128 flow [2024-06-04 14:50:31,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 210 transitions, 2061 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:31,244 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1612 flow [2024-06-04 14:50:31,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1612, PETRI_PLACES=148, PETRI_TRANSITIONS=172} [2024-06-04 14:50:31,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-04 14:50:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1612 flow [2024-06-04 14:50:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:31,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:50:31,245 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)] === [2024-06-04 14:50:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1974221077, now seen corresponding path program 4 times [2024-06-04 14:50:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609418075] [2024-06-04 14:50:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:32,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:32,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609418075] [2024-06-04 14:50:32,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609418075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:32,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:32,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:32,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085914882] [2024-06-04 14:50:32,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:32,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:32,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:32,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:32,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 172 transitions, 1612 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:32,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:32,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:32,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:33,343 INFO L124 PetriNetUnfolderBase]: 2230/3542 cut-off events. [2024-06-04 14:50:33,343 INFO L125 PetriNetUnfolderBase]: For 159745/159745 co-relation queries the response was YES. [2024-06-04 14:50:33,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24726 conditions, 3542 events. 2230/3542 cut-off events. For 159745/159745 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19522 event pairs, 531 based on Foata normal form. 12/3551 useless extension candidates. Maximal degree in co-relation 24663. Up to 2820 conditions per place. [2024-06-04 14:50:33,371 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 40 changer transitions 0/217 dead transitions. [2024-06-04 14:50:33,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 217 transitions, 2360 flow [2024-06-04 14:50:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:50:33,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-04 14:50:33,373 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1612 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:50:33,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 217 transitions, 2360 flow [2024-06-04 14:50:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 217 transitions, 2273 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:33,548 INFO L231 Difference]: Finished difference. Result has 150 places, 173 transitions, 1659 flow [2024-06-04 14:50:33,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1659, PETRI_PLACES=150, PETRI_TRANSITIONS=173} [2024-06-04 14:50:33,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 14:50:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 173 transitions, 1659 flow [2024-06-04 14:50:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:33,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:33,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:33,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:50:33,549 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)] === [2024-06-04 14:50:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1979792707, now seen corresponding path program 5 times [2024-06-04 14:50:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:33,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472189009] [2024-06-04 14:50:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:33,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472189009] [2024-06-04 14:50:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472189009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:34,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:34,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855108541] [2024-06-04 14:50:34,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:34,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:34,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 173 transitions, 1659 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:34,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:34,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:34,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:35,629 INFO L124 PetriNetUnfolderBase]: 2260/3598 cut-off events. [2024-06-04 14:50:35,629 INFO L125 PetriNetUnfolderBase]: For 168623/168623 co-relation queries the response was YES. [2024-06-04 14:50:35,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25088 conditions, 3598 events. 2260/3598 cut-off events. For 168623/168623 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20026 event pairs, 556 based on Foata normal form. 16/3614 useless extension candidates. Maximal degree in co-relation 25024. Up to 3264 conditions per place. [2024-06-04 14:50:35,654 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 26 changer transitions 0/212 dead transitions. [2024-06-04 14:50:35,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 212 transitions, 2238 flow [2024-06-04 14:50:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:50:35,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 14:50:35,655 INFO L175 Difference]: Start difference. First operand has 150 places, 173 transitions, 1659 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:50:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 212 transitions, 2238 flow [2024-06-04 14:50:35,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 212 transitions, 2149 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:35,848 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 1680 flow [2024-06-04 14:50:35,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1680, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-06-04 14:50:35,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-04 14:50:35,849 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 1680 flow [2024-06-04 14:50:35,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:35,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:35,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:35,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:50:35,849 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:35,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash -664478682, now seen corresponding path program 1 times [2024-06-04 14:50:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135871879] [2024-06-04 14:50:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:36,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:36,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135871879] [2024-06-04 14:50:36,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135871879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:36,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:36,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556214918] [2024-06-04 14:50:36,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:36,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:36,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 1680 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) [2024-06-04 14:50:36,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:36,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:36,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:37,254 INFO L124 PetriNetUnfolderBase]: 2363/3707 cut-off events. [2024-06-04 14:50:37,254 INFO L125 PetriNetUnfolderBase]: For 166339/166339 co-relation queries the response was YES. [2024-06-04 14:50:37,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25675 conditions, 3707 events. 2363/3707 cut-off events. For 166339/166339 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20217 event pairs, 590 based on Foata normal form. 2/3709 useless extension candidates. Maximal degree in co-relation 25610. Up to 3551 conditions per place. [2024-06-04 14:50:37,282 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 174 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2024-06-04 14:50:37,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 203 transitions, 2310 flow [2024-06-04 14:50:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 14:50:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-04 14:50:37,283 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 1680 flow. Second operand 7 states and 128 transitions. [2024-06-04 14:50:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 203 transitions, 2310 flow [2024-06-04 14:50:37,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2199 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-04 14:50:37,513 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 1729 flow [2024-06-04 14:50:37,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1729, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2024-06-04 14:50:37,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 14:50:37,513 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 1729 flow [2024-06-04 14:50:37,513 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) [2024-06-04 14:50:37,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:37,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:37,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:50:37,514 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:37,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1218553819, now seen corresponding path program 6 times [2024-06-04 14:50:37,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:37,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215272354] [2024-06-04 14:50:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:37,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215272354] [2024-06-04 14:50:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215272354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941669059] [2024-06-04 14:50:38,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:38,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:38,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 1729 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:38,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:38,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:38,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:39,645 INFO L124 PetriNetUnfolderBase]: 2436/3903 cut-off events. [2024-06-04 14:50:39,645 INFO L125 PetriNetUnfolderBase]: For 194448/194452 co-relation queries the response was YES. [2024-06-04 14:50:39,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 3903 events. 2436/3903 cut-off events. For 194448/194452 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22209 event pairs, 588 based on Foata normal form. 16/3919 useless extension candidates. Maximal degree in co-relation 27901. Up to 3208 conditions per place. [2024-06-04 14:50:39,674 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 170 selfloop transitions, 54 changer transitions 0/234 dead transitions. [2024-06-04 14:50:39,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 234 transitions, 2643 flow [2024-06-04 14:50:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-04 14:50:39,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-04 14:50:39,676 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 1729 flow. Second operand 10 states and 195 transitions. [2024-06-04 14:50:39,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 234 transitions, 2643 flow [2024-06-04 14:50:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 234 transitions, 2606 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:39,848 INFO L231 Difference]: Finished difference. Result has 160 places, 192 transitions, 2003 flow [2024-06-04 14:50:39,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2003, PETRI_PLACES=160, PETRI_TRANSITIONS=192} [2024-06-04 14:50:39,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-04 14:50:39,849 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 192 transitions, 2003 flow [2024-06-04 14:50:39,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:39,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:39,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:39,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:50:39,849 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:39,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1357467685, now seen corresponding path program 7 times [2024-06-04 14:50:39,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:39,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935800608] [2024-06-04 14:50:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:40,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:40,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935800608] [2024-06-04 14:50:40,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935800608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:40,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:40,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:40,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185060096] [2024-06-04 14:50:40,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:41,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:41,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 192 transitions, 2003 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:41,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:41,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:41,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:41,963 INFO L124 PetriNetUnfolderBase]: 2408/3856 cut-off events. [2024-06-04 14:50:41,963 INFO L125 PetriNetUnfolderBase]: For 198341/198341 co-relation queries the response was YES. [2024-06-04 14:50:41,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27633 conditions, 3856 events. 2408/3856 cut-off events. For 198341/198341 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21901 event pairs, 594 based on Foata normal form. 16/3871 useless extension candidates. Maximal degree in co-relation 27564. Up to 3374 conditions per place. [2024-06-04 14:50:41,992 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 59 changer transitions 0/228 dead transitions. [2024-06-04 14:50:41,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 228 transitions, 2567 flow [2024-06-04 14:50:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 14:50:41,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-04 14:50:41,994 INFO L175 Difference]: Start difference. First operand has 160 places, 192 transitions, 2003 flow. Second operand 10 states and 191 transitions. [2024-06-04 14:50:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 228 transitions, 2567 flow [2024-06-04 14:50:42,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 228 transitions, 2465 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:42,191 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 2042 flow [2024-06-04 14:50:42,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2042, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2024-06-04 14:50:42,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-04 14:50:42,192 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 2042 flow [2024-06-04 14:50:42,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:42,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:42,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:50:42,193 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:42,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash 731051755, now seen corresponding path program 8 times [2024-06-04 14:50:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:42,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387688438] [2024-06-04 14:50:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:43,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387688438] [2024-06-04 14:50:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387688438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242848617] [2024-06-04 14:50:43,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:43,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:43,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:43,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:43,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 2042 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:43,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:43,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:44,448 INFO L124 PetriNetUnfolderBase]: 2535/4072 cut-off events. [2024-06-04 14:50:44,448 INFO L125 PetriNetUnfolderBase]: For 216567/216571 co-relation queries the response was YES. [2024-06-04 14:50:44,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29994 conditions, 4072 events. 2535/4072 cut-off events. For 216567/216571 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23558 event pairs, 608 based on Foata normal form. 16/4088 useless extension candidates. Maximal degree in co-relation 29922. Up to 3353 conditions per place. [2024-06-04 14:50:44,481 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 57 changer transitions 0/236 dead transitions. [2024-06-04 14:50:44,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 236 transitions, 2896 flow [2024-06-04 14:50:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-04 14:50:44,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 14:50:44,482 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 2042 flow. Second operand 10 states and 196 transitions. [2024-06-04 14:50:44,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 236 transitions, 2896 flow [2024-06-04 14:50:44,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 236 transitions, 2779 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:44,703 INFO L231 Difference]: Finished difference. Result has 169 places, 195 transitions, 2147 flow [2024-06-04 14:50:44,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2147, PETRI_PLACES=169, PETRI_TRANSITIONS=195} [2024-06-04 14:50:44,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 14:50:44,703 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 195 transitions, 2147 flow [2024-06-04 14:50:44,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:44,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:44,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:44,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:50:44,704 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:44,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1613968195, now seen corresponding path program 9 times [2024-06-04 14:50:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79561406] [2024-06-04 14:50:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79561406] [2024-06-04 14:50:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79561406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:45,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:45,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820528043] [2024-06-04 14:50:45,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:45,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:45,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 195 transitions, 2147 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:45,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:46,713 INFO L124 PetriNetUnfolderBase]: 2593/4177 cut-off events. [2024-06-04 14:50:46,713 INFO L125 PetriNetUnfolderBase]: For 234841/234841 co-relation queries the response was YES. [2024-06-04 14:50:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31040 conditions, 4177 events. 2593/4177 cut-off events. For 234841/234841 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24421 event pairs, 645 based on Foata normal form. 16/4192 useless extension candidates. Maximal degree in co-relation 30967. Up to 3577 conditions per place. [2024-06-04 14:50:46,745 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 130 selfloop transitions, 91 changer transitions 0/231 dead transitions. [2024-06-04 14:50:46,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 2761 flow [2024-06-04 14:50:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 14:50:46,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-04 14:50:46,746 INFO L175 Difference]: Start difference. First operand has 169 places, 195 transitions, 2147 flow. Second operand 10 states and 191 transitions. [2024-06-04 14:50:46,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 2761 flow [2024-06-04 14:50:46,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 231 transitions, 2667 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:46,969 INFO L231 Difference]: Finished difference. Result has 173 places, 196 transitions, 2296 flow [2024-06-04 14:50:46,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2296, PETRI_PLACES=173, PETRI_TRANSITIONS=196} [2024-06-04 14:50:46,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-04 14:50:46,973 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 196 transitions, 2296 flow [2024-06-04 14:50:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:46,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:46,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:50:46,973 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:46,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2109814097, now seen corresponding path program 10 times [2024-06-04 14:50:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778989003] [2024-06-04 14:50:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:48,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:48,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778989003] [2024-06-04 14:50:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778989003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:48,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:48,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121984707] [2024-06-04 14:50:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:48,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:48,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:48,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:48,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 196 transitions, 2296 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:48,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:48,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:48,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:49,255 INFO L124 PetriNetUnfolderBase]: 2634/4261 cut-off events. [2024-06-04 14:50:49,256 INFO L125 PetriNetUnfolderBase]: For 242069/242073 co-relation queries the response was YES. [2024-06-04 14:50:49,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 4261 events. 2634/4261 cut-off events. For 242069/242073 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25071 event pairs, 623 based on Foata normal form. 16/4277 useless extension candidates. Maximal degree in co-relation 31931. Up to 3304 conditions per place. [2024-06-04 14:50:49,292 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 88 changer transitions 0/240 dead transitions. [2024-06-04 14:50:49,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 240 transitions, 2972 flow [2024-06-04 14:50:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-04 14:50:49,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-04 14:50:49,294 INFO L175 Difference]: Start difference. First operand has 173 places, 196 transitions, 2296 flow. Second operand 11 states and 212 transitions. [2024-06-04 14:50:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 240 transitions, 2972 flow [2024-06-04 14:50:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 2727 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-04 14:50:49,507 INFO L231 Difference]: Finished difference. Result has 174 places, 197 transitions, 2291 flow [2024-06-04 14:50:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2291, PETRI_PLACES=174, PETRI_TRANSITIONS=197} [2024-06-04 14:50:49,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:50:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 197 transitions, 2291 flow [2024-06-04 14:50:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:50:49,508 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -528249907, now seen corresponding path program 11 times [2024-06-04 14:50:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:49,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519092136] [2024-06-04 14:50:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:50,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519092136] [2024-06-04 14:50:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519092136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:50,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:50,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446665557] [2024-06-04 14:50:50,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:50,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:50,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:50,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:50,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 197 transitions, 2291 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:50,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:50,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:50,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:51,739 INFO L124 PetriNetUnfolderBase]: 2650/4293 cut-off events. [2024-06-04 14:50:51,739 INFO L125 PetriNetUnfolderBase]: For 247761/247765 co-relation queries the response was YES. [2024-06-04 14:50:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32023 conditions, 4293 events. 2650/4293 cut-off events. For 247761/247765 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25251 event pairs, 609 based on Foata normal form. 16/4309 useless extension candidates. Maximal degree in co-relation 31949. Up to 2372 conditions per place. [2024-06-04 14:50:51,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 130 selfloop transitions, 101 changer transitions 0/241 dead transitions. [2024-06-04 14:50:51,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 241 transitions, 3129 flow [2024-06-04 14:50:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-04 14:50:51,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 14:50:51,773 INFO L175 Difference]: Start difference. First operand has 174 places, 197 transitions, 2291 flow. Second operand 10 states and 196 transitions. [2024-06-04 14:50:51,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 241 transitions, 3129 flow [2024-06-04 14:50:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 241 transitions, 2915 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 14:50:51,976 INFO L231 Difference]: Finished difference. Result has 174 places, 198 transitions, 2347 flow [2024-06-04 14:50:51,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2347, PETRI_PLACES=174, PETRI_TRANSITIONS=198} [2024-06-04 14:50:51,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:50:51,977 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 198 transitions, 2347 flow [2024-06-04 14:50:51,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:51,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:51,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:50:51,977 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:51,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:51,978 INFO L85 PathProgramCache]: Analyzing trace with hash 731044315, now seen corresponding path program 12 times [2024-06-04 14:50:51,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:51,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352420586] [2024-06-04 14:50:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352420586] [2024-06-04 14:50:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352420586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466421254] [2024-06-04 14:50:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:53,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:53,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 2347 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:53,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:53,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:53,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:54,096 INFO L124 PetriNetUnfolderBase]: 2622/4246 cut-off events. [2024-06-04 14:50:54,097 INFO L125 PetriNetUnfolderBase]: For 238786/238786 co-relation queries the response was YES. [2024-06-04 14:50:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31038 conditions, 4246 events. 2622/4246 cut-off events. For 238786/238786 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25128 event pairs, 652 based on Foata normal form. 16/4261 useless extension candidates. Maximal degree in co-relation 30964. Up to 3735 conditions per place. [2024-06-04 14:50:54,134 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 162 selfloop transitions, 61 changer transitions 0/233 dead transitions. [2024-06-04 14:50:54,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 233 transitions, 2913 flow [2024-06-04 14:50:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:50:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:50:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:50:54,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-04 14:50:54,135 INFO L175 Difference]: Start difference. First operand has 174 places, 198 transitions, 2347 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:50:54,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 233 transitions, 2913 flow [2024-06-04 14:50:54,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 233 transitions, 2655 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:54,405 INFO L231 Difference]: Finished difference. Result has 176 places, 198 transitions, 2218 flow [2024-06-04 14:50:54,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2218, PETRI_PLACES=176, PETRI_TRANSITIONS=198} [2024-06-04 14:50:54,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-04 14:50:54,406 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 198 transitions, 2218 flow [2024-06-04 14:50:54,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:54,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:54,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:54,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:50:54,406 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)] === [2024-06-04 14:50:54,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1827289486, now seen corresponding path program 2 times [2024-06-04 14:50:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:54,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328534083] [2024-06-04 14:50:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328534083] [2024-06-04 14:50:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328534083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:55,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:55,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852318087] [2024-06-04 14:50:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 198 transitions, 2218 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) [2024-06-04 14:50:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:55,929 INFO L124 PetriNetUnfolderBase]: 2725/4353 cut-off events. [2024-06-04 14:50:55,929 INFO L125 PetriNetUnfolderBase]: For 227711/227711 co-relation queries the response was YES. [2024-06-04 14:50:55,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31116 conditions, 4353 events. 2725/4353 cut-off events. For 227711/227711 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25288 event pairs, 679 based on Foata normal form. 2/4354 useless extension candidates. Maximal degree in co-relation 31041. Up to 4159 conditions per place. [2024-06-04 14:50:55,968 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 29 changer transitions 0/215 dead transitions. [2024-06-04 14:50:55,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 215 transitions, 2828 flow [2024-06-04 14:50:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:50:55,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 14:50:55,969 INFO L175 Difference]: Start difference. First operand has 176 places, 198 transitions, 2218 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:50:55,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 215 transitions, 2828 flow [2024-06-04 14:50:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2692 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:56,182 INFO L231 Difference]: Finished difference. Result has 174 places, 201 transitions, 2190 flow [2024-06-04 14:50:56,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2190, PETRI_PLACES=174, PETRI_TRANSITIONS=201} [2024-06-04 14:50:56,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:50:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 201 transitions, 2190 flow [2024-06-04 14:50:56,182 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) [2024-06-04 14:50:56,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:56,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:50:56,182 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)] === [2024-06-04 14:50:56,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1614570804, now seen corresponding path program 3 times [2024-06-04 14:50:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855785120] [2024-06-04 14:50:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855785120] [2024-06-04 14:50:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855785120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:56,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:56,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629420116] [2024-06-04 14:50:56,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:56,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:56,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:50:56,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 201 transitions, 2190 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) [2024-06-04 14:50:56,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:56,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:50:56,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:57,722 INFO L124 PetriNetUnfolderBase]: 2719/4345 cut-off events. [2024-06-04 14:50:57,722 INFO L125 PetriNetUnfolderBase]: For 233080/233080 co-relation queries the response was YES. [2024-06-04 14:50:57,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30957 conditions, 4345 events. 2719/4345 cut-off events. For 233080/233080 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25228 event pairs, 684 based on Foata normal form. 2/4346 useless extension candidates. Maximal degree in co-relation 30881. Up to 4154 conditions per place. [2024-06-04 14:50:57,761 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2024-06-04 14:50:57,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 214 transitions, 2664 flow [2024-06-04 14:50:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:50:57,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 14:50:57,762 INFO L175 Difference]: Start difference. First operand has 174 places, 201 transitions, 2190 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:50:57,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 214 transitions, 2664 flow [2024-06-04 14:50:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 214 transitions, 2562 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 14:50:58,080 INFO L231 Difference]: Finished difference. Result has 177 places, 201 transitions, 2150 flow [2024-06-04 14:50:58,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2150, PETRI_PLACES=177, PETRI_TRANSITIONS=201} [2024-06-04 14:50:58,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-04 14:50:58,081 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 201 transitions, 2150 flow [2024-06-04 14:50:58,081 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) [2024-06-04 14:50:58,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:58,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:50:58,081 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)] === [2024-06-04 14:50:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:58,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1649806612, now seen corresponding path program 1 times [2024-06-04 14:50:58,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:58,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771561859] [2024-06-04 14:50:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:58,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771561859] [2024-06-04 14:50:58,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771561859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:58,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:58,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013083719] [2024-06-04 14:50:58,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:58,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:58,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:50:58,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 201 transitions, 2150 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:58,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:58,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:50:58,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:59,557 INFO L124 PetriNetUnfolderBase]: 2582/4206 cut-off events. [2024-06-04 14:50:59,557 INFO L125 PetriNetUnfolderBase]: For 210303/210303 co-relation queries the response was YES. [2024-06-04 14:50:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29208 conditions, 4206 events. 2582/4206 cut-off events. For 210303/210303 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25124 event pairs, 601 based on Foata normal form. 1/4200 useless extension candidates. Maximal degree in co-relation 29131. Up to 3993 conditions per place. [2024-06-04 14:50:59,590 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-04 14:50:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 220 transitions, 2654 flow [2024-06-04 14:50:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 14:50:59,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:50:59,594 INFO L175 Difference]: Start difference. First operand has 177 places, 201 transitions, 2150 flow. Second operand 7 states and 126 transitions. [2024-06-04 14:50:59,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 220 transitions, 2654 flow [2024-06-04 14:50:59,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 220 transitions, 2599 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:59,924 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 2177 flow [2024-06-04 14:50:59,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2177, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-04 14:50:59,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-04 14:50:59,925 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 2177 flow [2024-06-04 14:50:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:59,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:59,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:50:59,925 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)] === [2024-06-04 14:50:59,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 836055184, now seen corresponding path program 1 times [2024-06-04 14:50:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42357547] [2024-06-04 14:50:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:59,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42357547] [2024-06-04 14:51:00,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42357547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:00,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:00,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:00,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146132614] [2024-06-04 14:51:00,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:00,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:00,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:00,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 2177 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:00,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:00,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:00,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:01,297 INFO L124 PetriNetUnfolderBase]: 2600/4233 cut-off events. [2024-06-04 14:51:01,297 INFO L125 PetriNetUnfolderBase]: For 219559/219559 co-relation queries the response was YES. [2024-06-04 14:51:01,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29749 conditions, 4233 events. 2600/4233 cut-off events. For 219559/219559 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25244 event pairs, 602 based on Foata normal form. 2/4228 useless extension candidates. Maximal degree in co-relation 29671. Up to 3999 conditions per place. [2024-06-04 14:51:01,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 25 changer transitions 0/229 dead transitions. [2024-06-04 14:51:01,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 229 transitions, 2823 flow [2024-06-04 14:51:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 14:51:01,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-04 14:51:01,331 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 2177 flow. Second operand 7 states and 130 transitions. [2024-06-04 14:51:01,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 229 transitions, 2823 flow [2024-06-04 14:51:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 229 transitions, 2763 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:01,699 INFO L231 Difference]: Finished difference. Result has 182 places, 213 transitions, 2269 flow [2024-06-04 14:51:01,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2269, PETRI_PLACES=182, PETRI_TRANSITIONS=213} [2024-06-04 14:51:01,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 14:51:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 213 transitions, 2269 flow [2024-06-04 14:51:01,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:01,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:01,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:51:01,700 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash 836054998, now seen corresponding path program 2 times [2024-06-04 14:51:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411505707] [2024-06-04 14:51:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:02,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:02,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411505707] [2024-06-04 14:51:02,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411505707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:02,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392335009] [2024-06-04 14:51:02,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:02,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:02,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:02,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 213 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:02,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:02,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:02,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:03,228 INFO L124 PetriNetUnfolderBase]: 2619/4259 cut-off events. [2024-06-04 14:51:03,229 INFO L125 PetriNetUnfolderBase]: For 228240/228240 co-relation queries the response was YES. [2024-06-04 14:51:03,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30562 conditions, 4259 events. 2619/4259 cut-off events. For 228240/228240 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25368 event pairs, 601 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 30482. Up to 4028 conditions per place. [2024-06-04 14:51:03,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 26 changer transitions 0/233 dead transitions. [2024-06-04 14:51:03,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 233 transitions, 2947 flow [2024-06-04 14:51:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 14:51:03,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-04 14:51:03,271 INFO L175 Difference]: Start difference. First operand has 182 places, 213 transitions, 2269 flow. Second operand 7 states and 128 transitions. [2024-06-04 14:51:03,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 233 transitions, 2947 flow [2024-06-04 14:51:03,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 2911 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:51:03,663 INFO L231 Difference]: Finished difference. Result has 187 places, 219 transitions, 2397 flow [2024-06-04 14:51:03,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2397, PETRI_PLACES=187, PETRI_TRANSITIONS=219} [2024-06-04 14:51:03,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 14:51:03,663 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 219 transitions, 2397 flow [2024-06-04 14:51:03,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:03,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:03,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:03,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:51:03,664 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)] === [2024-06-04 14:51:03,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash -311984532, now seen corresponding path program 2 times [2024-06-04 14:51:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651181725] [2024-06-04 14:51:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651181725] [2024-06-04 14:51:04,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651181725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:04,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71247062] [2024-06-04 14:51:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:04,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:04,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 219 transitions, 2397 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:04,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:04,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:04,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:05,078 INFO L124 PetriNetUnfolderBase]: 2620/4261 cut-off events. [2024-06-04 14:51:05,078 INFO L125 PetriNetUnfolderBase]: For 238268/238268 co-relation queries the response was YES. [2024-06-04 14:51:05,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30902 conditions, 4261 events. 2620/4261 cut-off events. For 238268/238268 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25384 event pairs, 600 based on Foata normal form. 3/4257 useless extension candidates. Maximal degree in co-relation 30819. Up to 4050 conditions per place. [2024-06-04 14:51:05,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 208 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2024-06-04 14:51:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2907 flow [2024-06-04 14:51:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 14:51:05,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-04 14:51:05,114 INFO L175 Difference]: Start difference. First operand has 187 places, 219 transitions, 2397 flow. Second operand 7 states and 121 transitions. [2024-06-04 14:51:05,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2907 flow [2024-06-04 14:51:05,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 2845 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:05,448 INFO L231 Difference]: Finished difference. Result has 191 places, 222 transitions, 2414 flow [2024-06-04 14:51:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=191, PETRI_TRANSITIONS=222} [2024-06-04 14:51:05,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-04 14:51:05,448 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 222 transitions, 2414 flow [2024-06-04 14:51:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:51:05,449 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)] === [2024-06-04 14:51:05,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1827058102, now seen corresponding path program 3 times [2024-06-04 14:51:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:05,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342672893] [2024-06-04 14:51:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342672893] [2024-06-04 14:51:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342672893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:06,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434532004] [2024-06-04 14:51:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:06,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:06,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 222 transitions, 2414 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:06,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:06,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:06,902 INFO L124 PetriNetUnfolderBase]: 2617/4257 cut-off events. [2024-06-04 14:51:06,902 INFO L125 PetriNetUnfolderBase]: For 242217/242217 co-relation queries the response was YES. [2024-06-04 14:51:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31002 conditions, 4257 events. 2617/4257 cut-off events. For 242217/242217 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25310 event pairs, 600 based on Foata normal form. 1/4251 useless extension candidates. Maximal degree in co-relation 30917. Up to 4052 conditions per place. [2024-06-04 14:51:06,934 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 14 changer transitions 0/232 dead transitions. [2024-06-04 14:51:06,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 232 transitions, 2884 flow [2024-06-04 14:51:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:51:06,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-04 14:51:06,935 INFO L175 Difference]: Start difference. First operand has 191 places, 222 transitions, 2414 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:51:06,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 232 transitions, 2884 flow [2024-06-04 14:51:07,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 232 transitions, 2799 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:07,181 INFO L231 Difference]: Finished difference. Result has 193 places, 222 transitions, 2363 flow [2024-06-04 14:51:07,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2363, PETRI_PLACES=193, PETRI_TRANSITIONS=222} [2024-06-04 14:51:07,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 14:51:07,182 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 222 transitions, 2363 flow [2024-06-04 14:51:07,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:07,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:07,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:07,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:51:07,182 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)] === [2024-06-04 14:51:07,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1614386292, now seen corresponding path program 3 times [2024-06-04 14:51:07,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:07,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147263729] [2024-06-04 14:51:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:07,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147263729] [2024-06-04 14:51:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147263729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:07,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:07,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241140598] [2024-06-04 14:51:07,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:07,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 222 transitions, 2363 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:07,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:07,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:07,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:08,576 INFO L124 PetriNetUnfolderBase]: 2606/4244 cut-off events. [2024-06-04 14:51:08,576 INFO L125 PetriNetUnfolderBase]: For 248009/248009 co-relation queries the response was YES. [2024-06-04 14:51:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30896 conditions, 4244 events. 2606/4244 cut-off events. For 248009/248009 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25382 event pairs, 599 based on Foata normal form. 2/4239 useless extension candidates. Maximal degree in co-relation 30811. Up to 4025 conditions per place. [2024-06-04 14:51:08,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 21 changer transitions 0/234 dead transitions. [2024-06-04 14:51:08,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 234 transitions, 2845 flow [2024-06-04 14:51:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 14:51:08,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-04 14:51:08,615 INFO L175 Difference]: Start difference. First operand has 193 places, 222 transitions, 2363 flow. Second operand 7 states and 124 transitions. [2024-06-04 14:51:08,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 234 transitions, 2845 flow [2024-06-04 14:51:08,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 234 transitions, 2785 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:08,975 INFO L231 Difference]: Finished difference. Result has 194 places, 222 transitions, 2351 flow [2024-06-04 14:51:08,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2351, PETRI_PLACES=194, PETRI_TRANSITIONS=222} [2024-06-04 14:51:08,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 14:51:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 222 transitions, 2351 flow [2024-06-04 14:51:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:08,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:51:08,977 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:08,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1174965316, now seen corresponding path program 1 times [2024-06-04 14:51:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622890286] [2024-06-04 14:51:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:10,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:10,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622890286] [2024-06-04 14:51:10,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622890286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:10,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:10,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:10,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921628343] [2024-06-04 14:51:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:10,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:10,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 222 transitions, 2351 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:10,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:10,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:10,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:11,103 INFO L124 PetriNetUnfolderBase]: 2722/4392 cut-off events. [2024-06-04 14:51:11,103 INFO L125 PetriNetUnfolderBase]: For 311055/311055 co-relation queries the response was YES. [2024-06-04 14:51:11,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33420 conditions, 4392 events. 2722/4392 cut-off events. For 311055/311055 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25739 event pairs, 456 based on Foata normal form. 12/4394 useless extension candidates. Maximal degree in co-relation 33334. Up to 4008 conditions per place. [2024-06-04 14:51:11,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 18 changer transitions 0/268 dead transitions. [2024-06-04 14:51:11,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 268 transitions, 3051 flow [2024-06-04 14:51:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:51:11,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 14:51:11,138 INFO L175 Difference]: Start difference. First operand has 194 places, 222 transitions, 2351 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:51:11,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 268 transitions, 3051 flow [2024-06-04 14:51:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 268 transitions, 2984 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:11,461 INFO L231 Difference]: Finished difference. Result has 199 places, 225 transitions, 2405 flow [2024-06-04 14:51:11,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2405, PETRI_PLACES=199, PETRI_TRANSITIONS=225} [2024-06-04 14:51:11,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-04 14:51:11,461 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 225 transitions, 2405 flow [2024-06-04 14:51:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:11,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:11,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:11,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:51:11,462 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:11,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1525634482, now seen corresponding path program 2 times [2024-06-04 14:51:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969972998] [2024-06-04 14:51:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:11,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:12,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969972998] [2024-06-04 14:51:12,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969972998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:12,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:12,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416606242] [2024-06-04 14:51:12,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:12,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:12,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:12,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 225 transitions, 2405 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:12,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:12,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:13,854 INFO L124 PetriNetUnfolderBase]: 2775/4485 cut-off events. [2024-06-04 14:51:13,854 INFO L125 PetriNetUnfolderBase]: For 322542/322542 co-relation queries the response was YES. [2024-06-04 14:51:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34290 conditions, 4485 events. 2775/4485 cut-off events. For 322542/322542 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26694 event pairs, 603 based on Foata normal form. 12/4493 useless extension candidates. Maximal degree in co-relation 34202. Up to 4096 conditions per place. [2024-06-04 14:51:13,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 22 changer transitions 0/271 dead transitions. [2024-06-04 14:51:13,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 271 transitions, 3117 flow [2024-06-04 14:51:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 14:51:13,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:51:13,897 INFO L175 Difference]: Start difference. First operand has 199 places, 225 transitions, 2405 flow. Second operand 10 states and 190 transitions. [2024-06-04 14:51:13,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 271 transitions, 3117 flow [2024-06-04 14:51:14,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 271 transitions, 3033 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:14,317 INFO L231 Difference]: Finished difference. Result has 203 places, 229 transitions, 2460 flow [2024-06-04 14:51:14,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2460, PETRI_PLACES=203, PETRI_TRANSITIONS=229} [2024-06-04 14:51:14,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 14:51:14,318 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 229 transitions, 2460 flow [2024-06-04 14:51:14,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:14,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:14,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:14,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:51:14,318 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)] === [2024-06-04 14:51:14,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -369879450, now seen corresponding path program 3 times [2024-06-04 14:51:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:14,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208881342] [2024-06-04 14:51:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:14,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:15,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208881342] [2024-06-04 14:51:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208881342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:15,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:15,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480894296] [2024-06-04 14:51:15,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:15,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:15,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:15,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:15,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 229 transitions, 2460 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:15,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:15,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:16,578 INFO L124 PetriNetUnfolderBase]: 2816/4556 cut-off events. [2024-06-04 14:51:16,578 INFO L125 PetriNetUnfolderBase]: For 339288/339288 co-relation queries the response was YES. [2024-06-04 14:51:16,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34952 conditions, 4556 events. 2816/4556 cut-off events. For 339288/339288 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27220 event pairs, 628 based on Foata normal form. 12/4564 useless extension candidates. Maximal degree in co-relation 34862. Up to 4208 conditions per place. [2024-06-04 14:51:16,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 20 changer transitions 0/272 dead transitions. [2024-06-04 14:51:16,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 272 transitions, 3161 flow [2024-06-04 14:51:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:51:16,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 14:51:16,620 INFO L175 Difference]: Start difference. First operand has 203 places, 229 transitions, 2460 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:51:16,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 272 transitions, 3161 flow [2024-06-04 14:51:17,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 272 transitions, 3063 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:17,127 INFO L231 Difference]: Finished difference. Result has 207 places, 231 transitions, 2484 flow [2024-06-04 14:51:17,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2484, PETRI_PLACES=207, PETRI_TRANSITIONS=231} [2024-06-04 14:51:17,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 14:51:17,128 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 231 transitions, 2484 flow [2024-06-04 14:51:17,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:17,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:17,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:51:17,128 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)] === [2024-06-04 14:51:17,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 741683092, now seen corresponding path program 4 times [2024-06-04 14:51:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701501697] [2024-06-04 14:51:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:17,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:18,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:18,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701501697] [2024-06-04 14:51:18,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701501697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:18,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:18,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456467655] [2024-06-04 14:51:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:18,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:18,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 231 transitions, 2484 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:18,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:18,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:18,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:19,591 INFO L124 PetriNetUnfolderBase]: 2796/4524 cut-off events. [2024-06-04 14:51:19,592 INFO L125 PetriNetUnfolderBase]: For 332708/332708 co-relation queries the response was YES. [2024-06-04 14:51:19,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34063 conditions, 4524 events. 2796/4524 cut-off events. For 332708/332708 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26977 event pairs, 614 based on Foata normal form. 12/4532 useless extension candidates. Maximal degree in co-relation 33971. Up to 4164 conditions per place. [2024-06-04 14:51:19,632 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 25 changer transitions 0/270 dead transitions. [2024-06-04 14:51:19,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 270 transitions, 3108 flow [2024-06-04 14:51:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:51:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-04 14:51:19,634 INFO L175 Difference]: Start difference. First operand has 207 places, 231 transitions, 2484 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:51:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 270 transitions, 3108 flow [2024-06-04 14:51:20,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 270 transitions, 3007 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:20,103 INFO L231 Difference]: Finished difference. Result has 211 places, 232 transitions, 2448 flow [2024-06-04 14:51:20,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2448, PETRI_PLACES=211, PETRI_TRANSITIONS=232} [2024-06-04 14:51:20,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-04 14:51:20,104 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 232 transitions, 2448 flow [2024-06-04 14:51:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:20,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:20,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:20,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:51:20,104 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)] === [2024-06-04 14:51:20,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1248798746, now seen corresponding path program 5 times [2024-06-04 14:51:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324481373] [2024-06-04 14:51:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:21,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324481373] [2024-06-04 14:51:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324481373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:21,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:21,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487366390] [2024-06-04 14:51:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:21,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:21,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:21,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:21,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:21,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 232 transitions, 2448 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:21,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:21,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:21,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:22,370 INFO L124 PetriNetUnfolderBase]: 2837/4595 cut-off events. [2024-06-04 14:51:22,370 INFO L125 PetriNetUnfolderBase]: For 341966/341966 co-relation queries the response was YES. [2024-06-04 14:51:22,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34512 conditions, 4595 events. 2837/4595 cut-off events. For 341966/341966 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27544 event pairs, 619 based on Foata normal form. 12/4603 useless extension candidates. Maximal degree in co-relation 34418. Up to 4176 conditions per place. [2024-06-04 14:51:22,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 30 changer transitions 0/275 dead transitions. [2024-06-04 14:51:22,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 3170 flow [2024-06-04 14:51:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:51:22,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 14:51:22,412 INFO L175 Difference]: Start difference. First operand has 211 places, 232 transitions, 2448 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:51:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 3170 flow [2024-06-04 14:51:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 275 transitions, 3054 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:22,793 INFO L231 Difference]: Finished difference. Result has 213 places, 236 transitions, 2501 flow [2024-06-04 14:51:22,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2501, PETRI_PLACES=213, PETRI_TRANSITIONS=236} [2024-06-04 14:51:22,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 14:51:22,793 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 236 transitions, 2501 flow [2024-06-04 14:51:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:22,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:22,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:51:22,793 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:22,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1599427961, now seen corresponding path program 1 times [2024-06-04 14:51:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:22,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772555446] [2024-06-04 14:51:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:22,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772555446] [2024-06-04 14:51:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772555446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:23,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:23,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484916169] [2024-06-04 14:51:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:23,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:23,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:23,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 236 transitions, 2501 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) [2024-06-04 14:51:23,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:23,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:23,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:24,282 INFO L124 PetriNetUnfolderBase]: 2942/4714 cut-off events. [2024-06-04 14:51:24,282 INFO L125 PetriNetUnfolderBase]: For 342715/342715 co-relation queries the response was YES. [2024-06-04 14:51:24,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35426 conditions, 4714 events. 2942/4714 cut-off events. For 342715/342715 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27877 event pairs, 671 based on Foata normal form. 2/4716 useless extension candidates. Maximal degree in co-relation 35330. Up to 4531 conditions per place. [2024-06-04 14:51:24,328 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-04 14:51:24,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 269 transitions, 3358 flow [2024-06-04 14:51:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 14:51:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-04 14:51:24,328 INFO L175 Difference]: Start difference. First operand has 213 places, 236 transitions, 2501 flow. Second operand 7 states and 129 transitions. [2024-06-04 14:51:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 269 transitions, 3358 flow [2024-06-04 14:51:24,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 269 transitions, 3236 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:24,699 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 2604 flow [2024-06-04 14:51:24,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2604, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2024-06-04 14:51:24,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-04 14:51:24,700 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 2604 flow [2024-06-04 14:51:24,700 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) [2024-06-04 14:51:24,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:24,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:51:24,700 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:24,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 875990737, now seen corresponding path program 2 times [2024-06-04 14:51:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:24,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218720918] [2024-06-04 14:51:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218720918] [2024-06-04 14:51:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218720918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141284689] [2024-06-04 14:51:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:25,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:25,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 2604 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) [2024-06-04 14:51:25,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:25,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:25,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:26,252 INFO L124 PetriNetUnfolderBase]: 2952/4732 cut-off events. [2024-06-04 14:51:26,252 INFO L125 PetriNetUnfolderBase]: For 351638/351638 co-relation queries the response was YES. [2024-06-04 14:51:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35876 conditions, 4732 events. 2952/4732 cut-off events. For 351638/351638 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28068 event pairs, 671 based on Foata normal form. 2/4734 useless extension candidates. Maximal degree in co-relation 35778. Up to 4576 conditions per place. [2024-06-04 14:51:26,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 19 changer transitions 0/268 dead transitions. [2024-06-04 14:51:26,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 268 transitions, 3255 flow [2024-06-04 14:51:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 14:51:26,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-04 14:51:26,299 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 2604 flow. Second operand 7 states and 123 transitions. [2024-06-04 14:51:26,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 268 transitions, 3255 flow [2024-06-04 14:51:26,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 268 transitions, 3147 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-04 14:51:26,720 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2617 flow [2024-06-04 14:51:26,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2617, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2024-06-04 14:51:26,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 14:51:26,721 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2617 flow [2024-06-04 14:51:26,721 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) [2024-06-04 14:51:26,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:26,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:26,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:51:26,721 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:26,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1593706105, now seen corresponding path program 1 times [2024-06-04 14:51:26,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719655822] [2024-06-04 14:51:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:27,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:27,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719655822] [2024-06-04 14:51:27,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719655822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:27,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:27,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:27,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212112042] [2024-06-04 14:51:27,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:27,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:27,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:27,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2617 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) [2024-06-04 14:51:27,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:27,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:27,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:28,613 INFO L124 PetriNetUnfolderBase]: 2972/4758 cut-off events. [2024-06-04 14:51:28,613 INFO L125 PetriNetUnfolderBase]: For 365417/365417 co-relation queries the response was YES. [2024-06-04 14:51:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36145 conditions, 4758 events. 2972/4758 cut-off events. For 365417/365417 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28162 event pairs, 678 based on Foata normal form. 4/4762 useless extension candidates. Maximal degree in co-relation 36045. Up to 4508 conditions per place. [2024-06-04 14:51:28,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 39 changer transitions 0/280 dead transitions. [2024-06-04 14:51:28,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 280 transitions, 3471 flow [2024-06-04 14:51:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:51:28,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:51:28,659 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2617 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:51:28,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 280 transitions, 3471 flow [2024-06-04 14:51:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 280 transitions, 3411 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:29,116 INFO L231 Difference]: Finished difference. Result has 223 places, 257 transitions, 2743 flow [2024-06-04 14:51:29,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2743, PETRI_PLACES=223, PETRI_TRANSITIONS=257} [2024-06-04 14:51:29,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 14:51:29,117 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 257 transitions, 2743 flow [2024-06-04 14:51:29,117 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) [2024-06-04 14:51:29,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:29,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:29,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:51:29,117 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:29,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1015104642, now seen corresponding path program 6 times [2024-06-04 14:51:29,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185261836] [2024-06-04 14:51:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185261836] [2024-06-04 14:51:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185261836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:30,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:30,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811163133] [2024-06-04 14:51:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:30,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:30,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 257 transitions, 2743 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:30,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:30,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:30,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:31,701 INFO L124 PetriNetUnfolderBase]: 2874/4654 cut-off events. [2024-06-04 14:51:31,701 INFO L125 PetriNetUnfolderBase]: For 373396/373400 co-relation queries the response was YES. [2024-06-04 14:51:31,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35485 conditions, 4654 events. 2874/4654 cut-off events. For 373396/373400 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27930 event pairs, 619 based on Foata normal form. 16/4670 useless extension candidates. Maximal degree in co-relation 35384. Up to 4127 conditions per place. [2024-06-04 14:51:31,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 50 changer transitions 0/295 dead transitions. [2024-06-04 14:51:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 295 transitions, 3339 flow [2024-06-04 14:51:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 14:51:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 14:51:31,749 INFO L175 Difference]: Start difference. First operand has 223 places, 257 transitions, 2743 flow. Second operand 10 states and 188 transitions. [2024-06-04 14:51:31,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 295 transitions, 3339 flow [2024-06-04 14:51:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 295 transitions, 3271 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:32,202 INFO L231 Difference]: Finished difference. Result has 229 places, 259 transitions, 2732 flow [2024-06-04 14:51:32,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2732, PETRI_PLACES=229, PETRI_TRANSITIONS=259} [2024-06-04 14:51:32,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 14:51:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 259 transitions, 2732 flow [2024-06-04 14:51:32,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:32,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:32,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:32,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:51:32,203 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)] === [2024-06-04 14:51:32,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -403318137, now seen corresponding path program 3 times [2024-06-04 14:51:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:32,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989779839] [2024-06-04 14:51:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:32,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:32,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989779839] [2024-06-04 14:51:32,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989779839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:32,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:32,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546036494] [2024-06-04 14:51:32,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:32,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:32,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:33,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:33,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 259 transitions, 2732 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) [2024-06-04 14:51:33,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:33,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:33,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:33,814 INFO L124 PetriNetUnfolderBase]: 2970/4757 cut-off events. [2024-06-04 14:51:33,814 INFO L125 PetriNetUnfolderBase]: For 373792/373796 co-relation queries the response was YES. [2024-06-04 14:51:33,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 4757 events. 2970/4757 cut-off events. For 373792/373796 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28215 event pairs, 671 based on Foata normal form. 6/4763 useless extension candidates. Maximal degree in co-relation 36464. Up to 4510 conditions per place. [2024-06-04 14:51:33,864 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 44 changer transitions 0/286 dead transitions. [2024-06-04 14:51:33,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 286 transitions, 3744 flow [2024-06-04 14:51:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-04 14:51:33,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-04 14:51:33,865 INFO L175 Difference]: Start difference. First operand has 229 places, 259 transitions, 2732 flow. Second operand 7 states and 129 transitions. [2024-06-04 14:51:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 286 transitions, 3744 flow [2024-06-04 14:51:34,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 286 transitions, 3541 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:34,497 INFO L231 Difference]: Finished difference. Result has 228 places, 265 transitions, 2754 flow [2024-06-04 14:51:34,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2754, PETRI_PLACES=228, PETRI_TRANSITIONS=265} [2024-06-04 14:51:34,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 14:51:34,498 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 265 transitions, 2754 flow [2024-06-04 14:51:34,498 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) [2024-06-04 14:51:34,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:34,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:34,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:51:34,498 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)] === [2024-06-04 14:51:34,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1294318157, now seen corresponding path program 4 times [2024-06-04 14:51:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852082967] [2024-06-04 14:51:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:35,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:35,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852082967] [2024-06-04 14:51:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852082967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780275460] [2024-06-04 14:51:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:35,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:35,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 265 transitions, 2754 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) [2024-06-04 14:51:35,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:35,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:35,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:36,148 INFO L124 PetriNetUnfolderBase]: 2980/4771 cut-off events. [2024-06-04 14:51:36,149 INFO L125 PetriNetUnfolderBase]: For 382686/382690 co-relation queries the response was YES. [2024-06-04 14:51:36,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36665 conditions, 4771 events. 2980/4771 cut-off events. For 382686/382690 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28261 event pairs, 665 based on Foata normal form. 6/4777 useless extension candidates. Maximal degree in co-relation 36561. Up to 4520 conditions per place. [2024-06-04 14:51:36,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 48 changer transitions 0/285 dead transitions. [2024-06-04 14:51:36,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 285 transitions, 3578 flow [2024-06-04 14:51:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 14:51:36,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-04 14:51:36,195 INFO L175 Difference]: Start difference. First operand has 228 places, 265 transitions, 2754 flow. Second operand 7 states and 125 transitions. [2024-06-04 14:51:36,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 285 transitions, 3578 flow [2024-06-04 14:51:36,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 285 transitions, 3419 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:36,793 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 2765 flow [2024-06-04 14:51:36,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2765, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2024-06-04 14:51:36,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-04 14:51:36,794 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 2765 flow [2024-06-04 14:51:36,794 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) [2024-06-04 14:51:36,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:36,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:36,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:51:36,795 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)] === [2024-06-04 14:51:36,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1094664023, now seen corresponding path program 5 times [2024-06-04 14:51:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:36,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646663173] [2024-06-04 14:51:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:36,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:37,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646663173] [2024-06-04 14:51:37,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646663173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:37,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:37,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:37,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711601189] [2024-06-04 14:51:37,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:37,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:37,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:37,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 2765 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) [2024-06-04 14:51:37,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:37,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:38,339 INFO L124 PetriNetUnfolderBase]: 2974/4765 cut-off events. [2024-06-04 14:51:38,339 INFO L125 PetriNetUnfolderBase]: For 387935/387939 co-relation queries the response was YES. [2024-06-04 14:51:38,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36509 conditions, 4765 events. 2974/4765 cut-off events. For 387935/387939 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28262 event pairs, 667 based on Foata normal form. 6/4771 useless extension candidates. Maximal degree in co-relation 36403. Up to 4603 conditions per place. [2024-06-04 14:51:38,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 19 changer transitions 0/279 dead transitions. [2024-06-04 14:51:38,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 279 transitions, 3351 flow [2024-06-04 14:51:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:51:38,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:51:38,392 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 2765 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:51:38,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 279 transitions, 3351 flow [2024-06-04 14:51:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 279 transitions, 3251 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:39,033 INFO L231 Difference]: Finished difference. Result has 235 places, 268 transitions, 2709 flow [2024-06-04 14:51:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2709, PETRI_PLACES=235, PETRI_TRANSITIONS=268} [2024-06-04 14:51:39,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-04 14:51:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 268 transitions, 2709 flow [2024-06-04 14:51:39,033 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) [2024-06-04 14:51:39,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:39,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:39,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:51:39,034 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)] === [2024-06-04 14:51:39,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1479724663, now seen corresponding path program 6 times [2024-06-04 14:51:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:39,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784497562] [2024-06-04 14:51:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:39,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784497562] [2024-06-04 14:51:39,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784497562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:39,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:39,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382255926] [2024-06-04 14:51:39,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:39,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:39,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:39,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 268 transitions, 2709 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) [2024-06-04 14:51:39,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:39,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:39,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:40,613 INFO L124 PetriNetUnfolderBase]: 2968/4757 cut-off events. [2024-06-04 14:51:40,613 INFO L125 PetriNetUnfolderBase]: For 394538/394542 co-relation queries the response was YES. [2024-06-04 14:51:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36388 conditions, 4757 events. 2968/4757 cut-off events. For 394538/394542 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28222 event pairs, 666 based on Foata normal form. 6/4763 useless extension candidates. Maximal degree in co-relation 36281. Up to 4580 conditions per place. [2024-06-04 14:51:40,665 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 27 changer transitions 0/280 dead transitions. [2024-06-04 14:51:40,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 280 transitions, 3309 flow [2024-06-04 14:51:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:51:40,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 14:51:40,665 INFO L175 Difference]: Start difference. First operand has 235 places, 268 transitions, 2709 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:51:40,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 280 transitions, 3309 flow [2024-06-04 14:51:41,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 280 transitions, 3227 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:41,338 INFO L231 Difference]: Finished difference. Result has 236 places, 268 transitions, 2687 flow [2024-06-04 14:51:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2687, PETRI_PLACES=236, PETRI_TRANSITIONS=268} [2024-06-04 14:51:41,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 14:51:41,339 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 268 transitions, 2687 flow [2024-06-04 14:51:41,339 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) [2024-06-04 14:51:41,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:41,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:51:41,340 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)] === [2024-06-04 14:51:41,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 811400553, now seen corresponding path program 2 times [2024-06-04 14:51:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:41,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513144916] [2024-06-04 14:51:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:42,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:42,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513144916] [2024-06-04 14:51:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513144916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:42,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:42,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787205133] [2024-06-04 14:51:42,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:42,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:42,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 268 transitions, 2687 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) [2024-06-04 14:51:42,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:42,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:42,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:43,216 INFO L124 PetriNetUnfolderBase]: 3020/4826 cut-off events. [2024-06-04 14:51:43,216 INFO L125 PetriNetUnfolderBase]: For 419228/419228 co-relation queries the response was YES. [2024-06-04 14:51:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37306 conditions, 4826 events. 3020/4826 cut-off events. For 419228/419228 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28538 event pairs, 673 based on Foata normal form. 4/4829 useless extension candidates. Maximal degree in co-relation 37198. Up to 4539 conditions per place. [2024-06-04 14:51:43,269 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 47 changer transitions 0/293 dead transitions. [2024-06-04 14:51:43,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 293 transitions, 3707 flow [2024-06-04 14:51:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:51:43,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:51:43,270 INFO L175 Difference]: Start difference. First operand has 236 places, 268 transitions, 2687 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:51:43,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 293 transitions, 3707 flow [2024-06-04 14:51:43,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 293 transitions, 3607 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:43,809 INFO L231 Difference]: Finished difference. Result has 237 places, 274 transitions, 2791 flow [2024-06-04 14:51:43,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2791, PETRI_PLACES=237, PETRI_TRANSITIONS=274} [2024-06-04 14:51:43,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 14:51:43,810 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 274 transitions, 2791 flow [2024-06-04 14:51:43,810 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) [2024-06-04 14:51:43,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:43,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:43,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:51:43,810 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)] === [2024-06-04 14:51:43,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash 798513543, now seen corresponding path program 3 times [2024-06-04 14:51:43,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:43,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268283050] [2024-06-04 14:51:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:43,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:44,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:44,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268283050] [2024-06-04 14:51:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268283050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:44,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582231691] [2024-06-04 14:51:44,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:44,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:44,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 274 transitions, 2791 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) [2024-06-04 14:51:44,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:44,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:44,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:45,661 INFO L124 PetriNetUnfolderBase]: 3008/4812 cut-off events. [2024-06-04 14:51:45,661 INFO L125 PetriNetUnfolderBase]: For 422056/422056 co-relation queries the response was YES. [2024-06-04 14:51:45,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37143 conditions, 4812 events. 3008/4812 cut-off events. For 422056/422056 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28511 event pairs, 675 based on Foata normal form. 4/4815 useless extension candidates. Maximal degree in co-relation 37035. Up to 4531 conditions per place. [2024-06-04 14:51:45,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 45 changer transitions 0/293 dead transitions. [2024-06-04 14:51:45,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 293 transitions, 3589 flow [2024-06-04 14:51:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:51:45,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:51:45,717 INFO L175 Difference]: Start difference. First operand has 237 places, 274 transitions, 2791 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:51:45,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 293 transitions, 3589 flow [2024-06-04 14:51:46,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 293 transitions, 3452 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:46,437 INFO L231 Difference]: Finished difference. Result has 241 places, 274 transitions, 2750 flow [2024-06-04 14:51:46,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2750, PETRI_PLACES=241, PETRI_TRANSITIONS=274} [2024-06-04 14:51:46,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-04 14:51:46,438 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 274 transitions, 2750 flow [2024-06-04 14:51:46,438 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) [2024-06-04 14:51:46,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:46,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:46,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:51:46,438 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)] === [2024-06-04 14:51:46,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1500813993, now seen corresponding path program 4 times [2024-06-04 14:51:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:46,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100560029] [2024-06-04 14:51:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:47,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100560029] [2024-06-04 14:51:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100560029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520713856] [2024-06-04 14:51:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:47,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:51:47,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 274 transitions, 2750 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) [2024-06-04 14:51:47,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:47,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:51:47,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:48,258 INFO L124 PetriNetUnfolderBase]: 2996/4797 cut-off events. [2024-06-04 14:51:48,258 INFO L125 PetriNetUnfolderBase]: For 422739/422739 co-relation queries the response was YES. [2024-06-04 14:51:48,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36754 conditions, 4797 events. 2996/4797 cut-off events. For 422739/422739 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28468 event pairs, 657 based on Foata normal form. 4/4801 useless extension candidates. Maximal degree in co-relation 36645. Up to 4637 conditions per place. [2024-06-04 14:51:48,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 19 changer transitions 0/287 dead transitions. [2024-06-04 14:51:48,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 287 transitions, 3358 flow [2024-06-04 14:51:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:51:48,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:51:48,308 INFO L175 Difference]: Start difference. First operand has 241 places, 274 transitions, 2750 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:51:48,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 287 transitions, 3358 flow [2024-06-04 14:51:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 287 transitions, 3165 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:48,987 INFO L231 Difference]: Finished difference. Result has 240 places, 274 transitions, 2602 flow [2024-06-04 14:51:48,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2602, PETRI_PLACES=240, PETRI_TRANSITIONS=274} [2024-06-04 14:51:48,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-04 14:51:48,987 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 274 transitions, 2602 flow [2024-06-04 14:51:48,987 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) [2024-06-04 14:51:48,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:48,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:48,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:51:48,988 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)] === [2024-06-04 14:51:48,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash -395691641, now seen corresponding path program 1 times [2024-06-04 14:51:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:48,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142977825] [2024-06-04 14:51:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:48,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:49,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142977825] [2024-06-04 14:51:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142977825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:49,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:49,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621131030] [2024-06-04 14:51:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:49,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:49,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 274 transitions, 2602 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:49,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:49,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:49,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:50,869 INFO L124 PetriNetUnfolderBase]: 2845/4635 cut-off events. [2024-06-04 14:51:50,869 INFO L125 PetriNetUnfolderBase]: For 362428/362428 co-relation queries the response was YES. [2024-06-04 14:51:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33724 conditions, 4635 events. 2845/4635 cut-off events. For 362428/362428 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28248 event pairs, 596 based on Foata normal form. 1/4621 useless extension candidates. Maximal degree in co-relation 33615. Up to 4394 conditions per place. [2024-06-04 14:51:50,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 23 changer transitions 0/302 dead transitions. [2024-06-04 14:51:50,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 302 transitions, 3478 flow [2024-06-04 14:51:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:51:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:51:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 14:51:50,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-04 14:51:50,917 INFO L175 Difference]: Start difference. First operand has 240 places, 274 transitions, 2602 flow. Second operand 9 states and 158 transitions. [2024-06-04 14:51:50,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 302 transitions, 3478 flow [2024-06-04 14:51:51,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 302 transitions, 3386 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 14:51:51,534 INFO L231 Difference]: Finished difference. Result has 239 places, 280 transitions, 2668 flow [2024-06-04 14:51:51,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2668, PETRI_PLACES=239, PETRI_TRANSITIONS=280} [2024-06-04 14:51:51,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-04 14:51:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 280 transitions, 2668 flow [2024-06-04 14:51:51,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:51,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:51,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:51,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:51:51,535 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)] === [2024-06-04 14:51:51,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash -395601431, now seen corresponding path program 2 times [2024-06-04 14:51:51,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:51,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182328150] [2024-06-04 14:51:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:51,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:52,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:52,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182328150] [2024-06-04 14:51:52,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182328150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:52,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:52,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530514727] [2024-06-04 14:51:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:52,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:52,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:52,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 280 transitions, 2668 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:52,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:52,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:52,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:53,379 INFO L124 PetriNetUnfolderBase]: 2837/4626 cut-off events. [2024-06-04 14:51:53,379 INFO L125 PetriNetUnfolderBase]: For 371474/371474 co-relation queries the response was YES. [2024-06-04 14:51:53,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34082 conditions, 4626 events. 2837/4626 cut-off events. For 371474/371474 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28170 event pairs, 596 based on Foata normal form. 1/4612 useless extension candidates. Maximal degree in co-relation 33974. Up to 4398 conditions per place. [2024-06-04 14:51:53,423 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 17 changer transitions 0/297 dead transitions. [2024-06-04 14:51:53,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 297 transitions, 3286 flow [2024-06-04 14:51:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:51:53,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 14:51:53,424 INFO L175 Difference]: Start difference. First operand has 239 places, 280 transitions, 2668 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:51:53,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 297 transitions, 3286 flow [2024-06-04 14:51:53,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 297 transitions, 3188 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 14:51:53,991 INFO L231 Difference]: Finished difference. Result has 242 places, 280 transitions, 2610 flow [2024-06-04 14:51:53,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2610, PETRI_PLACES=242, PETRI_TRANSITIONS=280} [2024-06-04 14:51:53,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 14:51:53,992 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 280 transitions, 2610 flow [2024-06-04 14:51:53,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:53,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:53,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:53,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:51:53,992 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)] === [2024-06-04 14:51:53,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash -395601276, now seen corresponding path program 1 times [2024-06-04 14:51:53,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:53,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581808779] [2024-06-04 14:51:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:53,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:54,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:54,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581808779] [2024-06-04 14:51:54,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581808779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:54,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:54,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:54,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345006389] [2024-06-04 14:51:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:54,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:54,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:54,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:54,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 280 transitions, 2610 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:54,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:54,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:54,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:55,739 INFO L124 PetriNetUnfolderBase]: 2847/4640 cut-off events. [2024-06-04 14:51:55,740 INFO L125 PetriNetUnfolderBase]: For 383572/383572 co-relation queries the response was YES. [2024-06-04 14:51:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34306 conditions, 4640 events. 2847/4640 cut-off events. For 383572/383572 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28234 event pairs, 597 based on Foata normal form. 2/4627 useless extension candidates. Maximal degree in co-relation 34196. Up to 4409 conditions per place. [2024-06-04 14:51:55,783 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 17 changer transitions 0/301 dead transitions. [2024-06-04 14:51:55,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 301 transitions, 3294 flow [2024-06-04 14:51:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:51:55,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:51:55,784 INFO L175 Difference]: Start difference. First operand has 242 places, 280 transitions, 2610 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:51:55,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 301 transitions, 3294 flow [2024-06-04 14:51:56,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 301 transitions, 3248 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:56,615 INFO L231 Difference]: Finished difference. Result has 243 places, 283 transitions, 2664 flow [2024-06-04 14:51:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2664, PETRI_PLACES=243, PETRI_TRANSITIONS=283} [2024-06-04 14:51:56,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 14:51:56,616 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 283 transitions, 2664 flow [2024-06-04 14:51:56,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:56,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:56,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:56,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:51:56,616 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)] === [2024-06-04 14:51:56,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash -391876626, now seen corresponding path program 2 times [2024-06-04 14:51:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:56,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894785426] [2024-06-04 14:51:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:56,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:57,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:57,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894785426] [2024-06-04 14:51:57,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894785426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:57,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:51:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751981611] [2024-06-04 14:51:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:51:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:51:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:51:57,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:51:57,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 283 transitions, 2664 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:57,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:57,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:51:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:58,351 INFO L124 PetriNetUnfolderBase]: 2881/4689 cut-off events. [2024-06-04 14:51:58,352 INFO L125 PetriNetUnfolderBase]: For 401459/401459 co-relation queries the response was YES. [2024-06-04 14:51:58,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35319 conditions, 4689 events. 2881/4689 cut-off events. For 401459/401459 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28585 event pairs, 601 based on Foata normal form. 2/4676 useless extension candidates. Maximal degree in co-relation 35208. Up to 4384 conditions per place. [2024-06-04 14:51:58,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 46 changer transitions 0/311 dead transitions. [2024-06-04 14:51:58,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 311 transitions, 3782 flow [2024-06-04 14:51:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 14:51:58,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 14:51:58,402 INFO L175 Difference]: Start difference. First operand has 243 places, 283 transitions, 2664 flow. Second operand 8 states and 148 transitions. [2024-06-04 14:51:58,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 311 transitions, 3782 flow [2024-06-04 14:51:59,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 311 transitions, 3704 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:59,272 INFO L231 Difference]: Finished difference. Result has 245 places, 292 transitions, 2870 flow [2024-06-04 14:51:59,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2870, PETRI_PLACES=245, PETRI_TRANSITIONS=292} [2024-06-04 14:51:59,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-04 14:51:59,273 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 292 transitions, 2870 flow [2024-06-04 14:51:59,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:51:59,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:59,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:59,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:51:59,274 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)] === [2024-06-04 14:51:59,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash -391882206, now seen corresponding path program 3 times [2024-06-04 14:51:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:59,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963182314] [2024-06-04 14:51:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:59,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:00,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963182314] [2024-06-04 14:52:00,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963182314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:00,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:00,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779846869] [2024-06-04 14:52:00,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:00,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:00,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:00,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:00,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 292 transitions, 2870 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:00,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:00,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:00,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:00,976 INFO L124 PetriNetUnfolderBase]: 2875/4681 cut-off events. [2024-06-04 14:52:00,976 INFO L125 PetriNetUnfolderBase]: For 407658/407658 co-relation queries the response was YES. [2024-06-04 14:52:01,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35472 conditions, 4681 events. 2875/4681 cut-off events. For 407658/407658 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28540 event pairs, 600 based on Foata normal form. 2/4668 useless extension candidates. Maximal degree in co-relation 35360. Up to 4379 conditions per place. [2024-06-04 14:52:01,029 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 257 selfloop transitions, 45 changer transitions 0/311 dead transitions. [2024-06-04 14:52:01,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 311 transitions, 3670 flow [2024-06-04 14:52:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:52:01,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-04 14:52:01,030 INFO L175 Difference]: Start difference. First operand has 245 places, 292 transitions, 2870 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:52:01,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 311 transitions, 3670 flow [2024-06-04 14:52:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 311 transitions, 3548 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:01,826 INFO L231 Difference]: Finished difference. Result has 250 places, 292 transitions, 2844 flow [2024-06-04 14:52:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=250, PETRI_TRANSITIONS=292} [2024-06-04 14:52:01,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-04 14:52:01,827 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 292 transitions, 2844 flow [2024-06-04 14:52:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:01,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:01,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:01,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:52:01,827 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)] === [2024-06-04 14:52:01,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash 147902311, now seen corresponding path program 3 times [2024-06-04 14:52:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076373204] [2024-06-04 14:52:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076373204] [2024-06-04 14:52:02,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076373204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:02,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:02,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:02,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474757884] [2024-06-04 14:52:02,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:02,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:02,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:02,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:02,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 292 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:02,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:02,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:02,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:03,700 INFO L124 PetriNetUnfolderBase]: 2880/4688 cut-off events. [2024-06-04 14:52:03,701 INFO L125 PetriNetUnfolderBase]: For 414404/414404 co-relation queries the response was YES. [2024-06-04 14:52:03,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35632 conditions, 4688 events. 2880/4688 cut-off events. For 414404/414404 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28570 event pairs, 601 based on Foata normal form. 1/4674 useless extension candidates. Maximal degree in co-relation 35518. Up to 4443 conditions per place. [2024-06-04 14:52:03,754 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 29 changer transitions 0/309 dead transitions. [2024-06-04 14:52:03,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 309 transitions, 3538 flow [2024-06-04 14:52:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:52:03,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:52:03,755 INFO L175 Difference]: Start difference. First operand has 250 places, 292 transitions, 2844 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:52:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 309 transitions, 3538 flow [2024-06-04 14:52:04,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 309 transitions, 3430 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:04,542 INFO L231 Difference]: Finished difference. Result has 251 places, 295 transitions, 2866 flow [2024-06-04 14:52:04,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2866, PETRI_PLACES=251, PETRI_TRANSITIONS=295} [2024-06-04 14:52:04,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 14:52:04,543 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 295 transitions, 2866 flow [2024-06-04 14:52:04,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:04,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:04,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:52:04,543 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)] === [2024-06-04 14:52:04,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1847279584, now seen corresponding path program 4 times [2024-06-04 14:52:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589939002] [2024-06-04 14:52:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:05,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589939002] [2024-06-04 14:52:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589939002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:05,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205280459] [2024-06-04 14:52:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:05,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:05,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:05,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 295 transitions, 2866 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:05,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:05,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:05,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:06,220 INFO L124 PetriNetUnfolderBase]: 2890/4702 cut-off events. [2024-06-04 14:52:06,221 INFO L125 PetriNetUnfolderBase]: For 428253/428253 co-relation queries the response was YES. [2024-06-04 14:52:06,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36202 conditions, 4702 events. 2890/4702 cut-off events. For 428253/428253 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28684 event pairs, 600 based on Foata normal form. 2/4689 useless extension candidates. Maximal degree in co-relation 36087. Up to 4474 conditions per place. [2024-06-04 14:52:06,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 19 changer transitions 0/311 dead transitions. [2024-06-04 14:52:06,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 311 transitions, 3568 flow [2024-06-04 14:52:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:52:06,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:52:06,271 INFO L175 Difference]: Start difference. First operand has 251 places, 295 transitions, 2866 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:52:06,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 311 transitions, 3568 flow [2024-06-04 14:52:07,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 311 transitions, 3460 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:07,125 INFO L231 Difference]: Finished difference. Result has 253 places, 298 transitions, 2872 flow [2024-06-04 14:52:07,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2872, PETRI_PLACES=253, PETRI_TRANSITIONS=298} [2024-06-04 14:52:07,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-04 14:52:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 298 transitions, 2872 flow [2024-06-04 14:52:07,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:07,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:07,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:52:07,126 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)] === [2024-06-04 14:52:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1493633618, now seen corresponding path program 5 times [2024-06-04 14:52:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207893086] [2024-06-04 14:52:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207893086] [2024-06-04 14:52:07,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207893086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:07,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:07,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338479125] [2024-06-04 14:52:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:07,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:07,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 298 transitions, 2872 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:07,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:07,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:07,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:08,803 INFO L124 PetriNetUnfolderBase]: 2908/4730 cut-off events. [2024-06-04 14:52:08,804 INFO L125 PetriNetUnfolderBase]: For 439655/439655 co-relation queries the response was YES. [2024-06-04 14:52:08,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 4730 events. 2908/4730 cut-off events. For 439655/439655 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28877 event pairs, 598 based on Foata normal form. 2/4717 useless extension candidates. Maximal degree in co-relation 36423. Up to 4465 conditions per place. [2024-06-04 14:52:08,855 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-04 14:52:08,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 316 transitions, 3746 flow [2024-06-04 14:52:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:52:08,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:52:08,856 INFO L175 Difference]: Start difference. First operand has 253 places, 298 transitions, 2872 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:52:08,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 316 transitions, 3746 flow [2024-06-04 14:52:09,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 316 transitions, 3660 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:09,648 INFO L231 Difference]: Finished difference. Result has 255 places, 301 transitions, 2924 flow [2024-06-04 14:52:09,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2924, PETRI_PLACES=255, PETRI_TRANSITIONS=301} [2024-06-04 14:52:09,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 14:52:09,649 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 301 transitions, 2924 flow [2024-06-04 14:52:09,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:09,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:09,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:52:09,649 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)] === [2024-06-04 14:52:09,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 804227463, now seen corresponding path program 4 times [2024-06-04 14:52:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:09,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315759953] [2024-06-04 14:52:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:10,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:10,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315759953] [2024-06-04 14:52:10,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315759953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:10,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:10,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:10,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633797732] [2024-06-04 14:52:10,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:10,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:10,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 301 transitions, 2924 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:10,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:10,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:10,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:11,408 INFO L124 PetriNetUnfolderBase]: 2905/4724 cut-off events. [2024-06-04 14:52:11,408 INFO L125 PetriNetUnfolderBase]: For 443554/443554 co-relation queries the response was YES. [2024-06-04 14:52:11,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36471 conditions, 4724 events. 2905/4724 cut-off events. For 443554/443554 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28788 event pairs, 602 based on Foata normal form. 1/4710 useless extension candidates. Maximal degree in co-relation 36354. Up to 4504 conditions per place. [2024-06-04 14:52:11,460 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 289 selfloop transitions, 17 changer transitions 0/315 dead transitions. [2024-06-04 14:52:11,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 315 transitions, 3628 flow [2024-06-04 14:52:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:52:11,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:52:11,461 INFO L175 Difference]: Start difference. First operand has 255 places, 301 transitions, 2924 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:52:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 315 transitions, 3628 flow [2024-06-04 14:52:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 315 transitions, 3487 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:12,199 INFO L231 Difference]: Finished difference. Result has 257 places, 304 transitions, 2895 flow [2024-06-04 14:52:12,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2895, PETRI_PLACES=257, PETRI_TRANSITIONS=304} [2024-06-04 14:52:12,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-04 14:52:12,200 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 304 transitions, 2895 flow [2024-06-04 14:52:12,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:12,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:12,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:12,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:52:12,200 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)] === [2024-06-04 14:52:12,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 804227618, now seen corresponding path program 6 times [2024-06-04 14:52:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:12,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949763858] [2024-06-04 14:52:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:12,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:12,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949763858] [2024-06-04 14:52:12,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949763858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:12,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:12,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604084213] [2024-06-04 14:52:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:12,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:13,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:13,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 304 transitions, 2895 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:13,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:13,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:13,822 INFO L124 PetriNetUnfolderBase]: 2891/4706 cut-off events. [2024-06-04 14:52:13,822 INFO L125 PetriNetUnfolderBase]: For 448664/448664 co-relation queries the response was YES. [2024-06-04 14:52:13,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36520 conditions, 4706 events. 2891/4706 cut-off events. For 448664/448664 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28688 event pairs, 597 based on Foata normal form. 2/4693 useless extension candidates. Maximal degree in co-relation 36402. Up to 4450 conditions per place. [2024-06-04 14:52:13,875 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 32 changer transitions 0/318 dead transitions. [2024-06-04 14:52:13,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 318 transitions, 3551 flow [2024-06-04 14:52:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:52:13,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 14:52:13,876 INFO L175 Difference]: Start difference. First operand has 257 places, 304 transitions, 2895 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:52:13,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 318 transitions, 3551 flow [2024-06-04 14:52:14,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 318 transitions, 3415 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:14,900 INFO L231 Difference]: Finished difference. Result has 259 places, 304 transitions, 2829 flow [2024-06-04 14:52:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2829, PETRI_PLACES=259, PETRI_TRANSITIONS=304} [2024-06-04 14:52:14,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-04 14:52:14,901 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 304 transitions, 2829 flow [2024-06-04 14:52:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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) [2024-06-04 14:52:14,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:14,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:14,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:52:14,901 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)] === [2024-06-04 14:52:14,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1501262315, now seen corresponding path program 1 times [2024-06-04 14:52:14,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:14,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658129779] [2024-06-04 14:52:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658129779] [2024-06-04 14:52:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658129779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:15,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:15,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157349498] [2024-06-04 14:52:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:15,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:15,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:15,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 304 transitions, 2829 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:15,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:15,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:15,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:16,880 INFO L124 PetriNetUnfolderBase]: 3077/4911 cut-off events. [2024-06-04 14:52:16,880 INFO L125 PetriNetUnfolderBase]: For 533270/533270 co-relation queries the response was YES. [2024-06-04 14:52:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39502 conditions, 4911 events. 3077/4911 cut-off events. For 533270/533270 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29069 event pairs, 669 based on Foata normal form. 2/4913 useless extension candidates. Maximal degree in co-relation 39383. Up to 4761 conditions per place. [2024-06-04 14:52:16,933 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 296 selfloop transitions, 18 changer transitions 0/318 dead transitions. [2024-06-04 14:52:16,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 318 transitions, 3535 flow [2024-06-04 14:52:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:52:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:52:16,934 INFO L175 Difference]: Start difference. First operand has 259 places, 304 transitions, 2829 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:52:16,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 318 transitions, 3535 flow [2024-06-04 14:52:17,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 318 transitions, 3463 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:17,857 INFO L231 Difference]: Finished difference. Result has 260 places, 306 transitions, 2852 flow [2024-06-04 14:52:17,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2852, PETRI_PLACES=260, PETRI_TRANSITIONS=306} [2024-06-04 14:52:17,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-04 14:52:17,857 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 306 transitions, 2852 flow [2024-06-04 14:52:17,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:17,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:17,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:52:17,858 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)] === [2024-06-04 14:52:17,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1838892057, now seen corresponding path program 1 times [2024-06-04 14:52:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:17,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165766129] [2024-06-04 14:52:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:18,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:18,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165766129] [2024-06-04 14:52:18,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165766129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:18,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:18,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038734578] [2024-06-04 14:52:18,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:18,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:18,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:18,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:18,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 306 transitions, 2852 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) [2024-06-04 14:52:18,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:18,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:18,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:19,955 INFO L124 PetriNetUnfolderBase]: 3085/4923 cut-off events. [2024-06-04 14:52:19,955 INFO L125 PetriNetUnfolderBase]: For 545124/545124 co-relation queries the response was YES. [2024-06-04 14:52:19,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39808 conditions, 4923 events. 3085/4923 cut-off events. For 545124/545124 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28937 event pairs, 534 based on Foata normal form. 2/4925 useless extension candidates. Maximal degree in co-relation 39688. Up to 4695 conditions per place. [2024-06-04 14:52:20,006 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 306 selfloop transitions, 29 changer transitions 0/339 dead transitions. [2024-06-04 14:52:20,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 339 transitions, 3832 flow [2024-06-04 14:52:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:52:20,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:52:20,007 INFO L175 Difference]: Start difference. First operand has 260 places, 306 transitions, 2852 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:52:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 339 transitions, 3832 flow [2024-06-04 14:52:20,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 339 transitions, 3753 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:20,884 INFO L231 Difference]: Finished difference. Result has 262 places, 310 transitions, 2920 flow [2024-06-04 14:52:20,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2920, PETRI_PLACES=262, PETRI_TRANSITIONS=310} [2024-06-04 14:52:20,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 14:52:20,884 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 310 transitions, 2920 flow [2024-06-04 14:52:20,884 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) [2024-06-04 14:52:20,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:20,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:20,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:52:20,885 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)] === [2024-06-04 14:52:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1847462937, now seen corresponding path program 2 times [2024-06-04 14:52:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065384394] [2024-06-04 14:52:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:21,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:21,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065384394] [2024-06-04 14:52:21,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065384394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:21,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:21,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:21,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744008296] [2024-06-04 14:52:21,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:21,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:21,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 310 transitions, 2920 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) [2024-06-04 14:52:21,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:21,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:21,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:22,977 INFO L124 PetriNetUnfolderBase]: 3098/4942 cut-off events. [2024-06-04 14:52:22,977 INFO L125 PetriNetUnfolderBase]: For 558281/558281 co-relation queries the response was YES. [2024-06-04 14:52:23,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40198 conditions, 4942 events. 3098/4942 cut-off events. For 558281/558281 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29244 event pairs, 664 based on Foata normal form. 2/4944 useless extension candidates. Maximal degree in co-relation 40077. Up to 4756 conditions per place. [2024-06-04 14:52:23,029 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 306 selfloop transitions, 29 changer transitions 0/339 dead transitions. [2024-06-04 14:52:23,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 339 transitions, 3725 flow [2024-06-04 14:52:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:52:23,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:52:23,030 INFO L175 Difference]: Start difference. First operand has 262 places, 310 transitions, 2920 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:52:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 339 transitions, 3725 flow [2024-06-04 14:52:24,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 339 transitions, 3627 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:24,135 INFO L231 Difference]: Finished difference. Result has 267 places, 315 transitions, 2964 flow [2024-06-04 14:52:24,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2842, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2964, PETRI_PLACES=267, PETRI_TRANSITIONS=315} [2024-06-04 14:52:24,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-04 14:52:24,136 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 315 transitions, 2964 flow [2024-06-04 14:52:24,136 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) [2024-06-04 14:52:24,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:24,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:24,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:52:24,136 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)] === [2024-06-04 14:52:24,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1841751993, now seen corresponding path program 1 times [2024-06-04 14:52:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:24,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813037368] [2024-06-04 14:52:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:25,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:25,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813037368] [2024-06-04 14:52:25,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813037368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:25,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:25,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964086881] [2024-06-04 14:52:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:25,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:25,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 315 transitions, 2964 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) [2024-06-04 14:52:25,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:25,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:25,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:26,155 INFO L124 PetriNetUnfolderBase]: 3103/4949 cut-off events. [2024-06-04 14:52:26,155 INFO L125 PetriNetUnfolderBase]: For 568042/568042 co-relation queries the response was YES. [2024-06-04 14:52:26,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40365 conditions, 4949 events. 3103/4949 cut-off events. For 568042/568042 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29252 event pairs, 663 based on Foata normal form. 1/4950 useless extension candidates. Maximal degree in co-relation 40242. Up to 4749 conditions per place. [2024-06-04 14:52:26,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-04 14:52:26,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 348 transitions, 4018 flow [2024-06-04 14:52:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:52:26,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:52:26,204 INFO L175 Difference]: Start difference. First operand has 267 places, 315 transitions, 2964 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:52:26,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 348 transitions, 4018 flow [2024-06-04 14:52:27,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 348 transitions, 3945 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:27,298 INFO L231 Difference]: Finished difference. Result has 270 places, 321 transitions, 3109 flow [2024-06-04 14:52:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3109, PETRI_PLACES=270, PETRI_TRANSITIONS=321} [2024-06-04 14:52:27,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-04 14:52:27,299 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 321 transitions, 3109 flow [2024-06-04 14:52:27,299 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) [2024-06-04 14:52:27,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:27,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:52:27,299 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)] === [2024-06-04 14:52:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1809103601, now seen corresponding path program 2 times [2024-06-04 14:52:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648010144] [2024-06-04 14:52:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:28,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648010144] [2024-06-04 14:52:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648010144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:28,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:28,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818901044] [2024-06-04 14:52:28,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:28,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:28,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:28,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 321 transitions, 3109 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) [2024-06-04 14:52:28,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:28,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:29,185 INFO L124 PetriNetUnfolderBase]: 3108/4956 cut-off events. [2024-06-04 14:52:29,185 INFO L125 PetriNetUnfolderBase]: For 584801/584801 co-relation queries the response was YES. [2024-06-04 14:52:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40961 conditions, 4956 events. 3108/4956 cut-off events. For 584801/584801 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29358 event pairs, 663 based on Foata normal form. 1/4957 useless extension candidates. Maximal degree in co-relation 40837. Up to 4773 conditions per place. [2024-06-04 14:52:29,241 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 30 changer transitions 0/347 dead transitions. [2024-06-04 14:52:29,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 347 transitions, 3927 flow [2024-06-04 14:52:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:52:29,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:52:29,243 INFO L175 Difference]: Start difference. First operand has 270 places, 321 transitions, 3109 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:52:29,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 347 transitions, 3927 flow [2024-06-04 14:52:30,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 347 transitions, 3755 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:30,473 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 3083 flow [2024-06-04 14:52:30,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-04 14:52:30,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-04 14:52:30,474 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 3083 flow [2024-06-04 14:52:30,474 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) [2024-06-04 14:52:30,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:30,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:30,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:52:30,474 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)] === [2024-06-04 14:52:30,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1385787057, now seen corresponding path program 3 times [2024-06-04 14:52:30,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:30,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575049993] [2024-06-04 14:52:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:30,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575049993] [2024-06-04 14:52:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575049993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53731950] [2024-06-04 14:52:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:31,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:31,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:31,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 3083 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) [2024-06-04 14:52:31,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:31,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:31,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:32,522 INFO L124 PetriNetUnfolderBase]: 3116/4968 cut-off events. [2024-06-04 14:52:32,522 INFO L125 PetriNetUnfolderBase]: For 600536/600536 co-relation queries the response was YES. [2024-06-04 14:52:32,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41045 conditions, 4968 events. 3116/4968 cut-off events. For 600536/600536 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29424 event pairs, 663 based on Foata normal form. 2/4970 useless extension candidates. Maximal degree in co-relation 40919. Up to 4782 conditions per place. [2024-06-04 14:52:32,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2024-06-04 14:52:32,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 344 transitions, 3839 flow [2024-06-04 14:52:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:52:32,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:52:32,580 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 3083 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:52:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 344 transitions, 3839 flow [2024-06-04 14:52:33,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 344 transitions, 3759 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:33,827 INFO L231 Difference]: Finished difference. Result has 276 places, 326 transitions, 3100 flow [2024-06-04 14:52:33,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3100, PETRI_PLACES=276, PETRI_TRANSITIONS=326} [2024-06-04 14:52:33,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-04 14:52:33,828 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 326 transitions, 3100 flow [2024-06-04 14:52:33,828 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) [2024-06-04 14:52:33,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:33,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:33,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:52:33,828 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)] === [2024-06-04 14:52:33,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1957221909, now seen corresponding path program 1 times [2024-06-04 14:52:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:33,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937808132] [2024-06-04 14:52:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:34,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:34,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937808132] [2024-06-04 14:52:34,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937808132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:34,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:34,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76590574] [2024-06-04 14:52:34,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:34,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:34,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 326 transitions, 3100 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) [2024-06-04 14:52:34,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:34,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:35,829 INFO L124 PetriNetUnfolderBase]: 3126/4984 cut-off events. [2024-06-04 14:52:35,829 INFO L125 PetriNetUnfolderBase]: For 614380/614380 co-relation queries the response was YES. [2024-06-04 14:52:35,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41356 conditions, 4984 events. 3126/4984 cut-off events. For 614380/614380 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29559 event pairs, 665 based on Foata normal form. 2/4986 useless extension candidates. Maximal degree in co-relation 41229. Up to 4780 conditions per place. [2024-06-04 14:52:35,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 24 changer transitions 0/353 dead transitions. [2024-06-04 14:52:35,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 353 transitions, 3948 flow [2024-06-04 14:52:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:52:35,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:52:35,889 INFO L175 Difference]: Start difference. First operand has 276 places, 326 transitions, 3100 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:52:35,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 353 transitions, 3948 flow [2024-06-04 14:52:37,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 353 transitions, 3865 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:37,045 INFO L231 Difference]: Finished difference. Result has 278 places, 329 transitions, 3159 flow [2024-06-04 14:52:37,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3159, PETRI_PLACES=278, PETRI_TRANSITIONS=329} [2024-06-04 14:52:37,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 14:52:37,046 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 329 transitions, 3159 flow [2024-06-04 14:52:37,046 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) [2024-06-04 14:52:37,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:37,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:52:37,046 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)] === [2024-06-04 14:52:37,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1957342065, now seen corresponding path program 1 times [2024-06-04 14:52:37,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:37,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658422278] [2024-06-04 14:52:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:37,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:37,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658422278] [2024-06-04 14:52:37,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658422278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:37,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:37,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853564069] [2024-06-04 14:52:37,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:37,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:37,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:37,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 329 transitions, 3159 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) [2024-06-04 14:52:37,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:37,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:37,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:38,802 INFO L124 PetriNetUnfolderBase]: 3152/5024 cut-off events. [2024-06-04 14:52:38,802 INFO L125 PetriNetUnfolderBase]: For 637571/637571 co-relation queries the response was YES. [2024-06-04 14:52:38,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42300 conditions, 5024 events. 3152/5024 cut-off events. For 637571/637571 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29826 event pairs, 659 based on Foata normal form. 2/5026 useless extension candidates. Maximal degree in co-relation 42172. Up to 4783 conditions per place. [2024-06-04 14:52:38,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 40 changer transitions 0/366 dead transitions. [2024-06-04 14:52:38,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 366 transitions, 4300 flow [2024-06-04 14:52:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:52:38,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 14:52:38,868 INFO L175 Difference]: Start difference. First operand has 278 places, 329 transitions, 3159 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:52:38,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 366 transitions, 4300 flow [2024-06-04 14:52:39,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 366 transitions, 4186 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:39,951 INFO L231 Difference]: Finished difference. Result has 281 places, 342 transitions, 3326 flow [2024-06-04 14:52:39,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3326, PETRI_PLACES=281, PETRI_TRANSITIONS=342} [2024-06-04 14:52:39,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-04 14:52:39,952 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 342 transitions, 3326 flow [2024-06-04 14:52:39,952 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) [2024-06-04 14:52:39,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:39,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:52:39,952 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)] === [2024-06-04 14:52:39,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1208778669, now seen corresponding path program 2 times [2024-06-04 14:52:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672387684] [2024-06-04 14:52:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:39,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672387684] [2024-06-04 14:52:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672387684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:40,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:40,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:40,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308196449] [2024-06-04 14:52:40,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:40,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:40,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 342 transitions, 3326 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) [2024-06-04 14:52:40,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:40,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:41,908 INFO L124 PetriNetUnfolderBase]: 3178/5060 cut-off events. [2024-06-04 14:52:41,908 INFO L125 PetriNetUnfolderBase]: For 664590/664590 co-relation queries the response was YES. [2024-06-04 14:52:41,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43582 conditions, 5060 events. 3178/5060 cut-off events. For 664590/664590 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30042 event pairs, 659 based on Foata normal form. 2/5062 useless extension candidates. Maximal degree in co-relation 43452. Up to 4800 conditions per place. [2024-06-04 14:52:41,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 42 changer transitions 0/372 dead transitions. [2024-06-04 14:52:41,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 372 transitions, 4504 flow [2024-06-04 14:52:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:52:41,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:52:41,967 INFO L175 Difference]: Start difference. First operand has 281 places, 342 transitions, 3326 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:52:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 372 transitions, 4504 flow [2024-06-04 14:52:43,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 372 transitions, 4405 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:43,028 INFO L231 Difference]: Finished difference. Result has 286 places, 348 transitions, 3505 flow [2024-06-04 14:52:43,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3233, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=286, PETRI_TRANSITIONS=348} [2024-06-04 14:52:43,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 14:52:43,028 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 348 transitions, 3505 flow [2024-06-04 14:52:43,028 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) [2024-06-04 14:52:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:43,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:52:43,029 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)] === [2024-06-04 14:52:43,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1386147525, now seen corresponding path program 2 times [2024-06-04 14:52:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330009977] [2024-06-04 14:52:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:43,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:43,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330009977] [2024-06-04 14:52:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330009977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:43,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165887226] [2024-06-04 14:52:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:43,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:43,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 348 transitions, 3505 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) [2024-06-04 14:52:43,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:43,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:43,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:44,848 INFO L124 PetriNetUnfolderBase]: 3188/5074 cut-off events. [2024-06-04 14:52:44,849 INFO L125 PetriNetUnfolderBase]: For 682500/682500 co-relation queries the response was YES. [2024-06-04 14:52:44,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44066 conditions, 5074 events. 3188/5074 cut-off events. For 682500/682500 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30179 event pairs, 666 based on Foata normal form. 2/5076 useless extension candidates. Maximal degree in co-relation 43934. Up to 4894 conditions per place. [2024-06-04 14:52:44,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 28 changer transitions 0/370 dead transitions. [2024-06-04 14:52:44,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 370 transitions, 4336 flow [2024-06-04 14:52:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 14:52:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 14:52:44,913 INFO L175 Difference]: Start difference. First operand has 286 places, 348 transitions, 3505 flow. Second operand 8 states and 137 transitions. [2024-06-04 14:52:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 370 transitions, 4336 flow [2024-06-04 14:52:46,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 370 transitions, 4197 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:46,504 INFO L231 Difference]: Finished difference. Result has 290 places, 352 transitions, 3479 flow [2024-06-04 14:52:46,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3479, PETRI_PLACES=290, PETRI_TRANSITIONS=352} [2024-06-04 14:52:46,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-04 14:52:46,505 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 352 transitions, 3479 flow [2024-06-04 14:52:46,505 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) [2024-06-04 14:52:46,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:46,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:46,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:52:46,505 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)] === [2024-06-04 14:52:46,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1385790033, now seen corresponding path program 3 times [2024-06-04 14:52:46,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925527063] [2024-06-04 14:52:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925527063] [2024-06-04 14:52:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925527063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:47,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321864899] [2024-06-04 14:52:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:47,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:47,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:47,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 352 transitions, 3479 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) [2024-06-04 14:52:47,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:47,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:48,483 INFO L124 PetriNetUnfolderBase]: 3193/5079 cut-off events. [2024-06-04 14:52:48,484 INFO L125 PetriNetUnfolderBase]: For 691886/691886 co-relation queries the response was YES. [2024-06-04 14:52:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44163 conditions, 5079 events. 3193/5079 cut-off events. For 691886/691886 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30162 event pairs, 661 based on Foata normal form. 1/5080 useless extension candidates. Maximal degree in co-relation 44029. Up to 4892 conditions per place. [2024-06-04 14:52:48,548 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 29 changer transitions 0/372 dead transitions. [2024-06-04 14:52:48,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 372 transitions, 4299 flow [2024-06-04 14:52:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:52:48,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:52:48,549 INFO L175 Difference]: Start difference. First operand has 290 places, 352 transitions, 3479 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:52:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 372 transitions, 4299 flow [2024-06-04 14:52:50,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 372 transitions, 4221 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:50,212 INFO L231 Difference]: Finished difference. Result has 293 places, 355 transitions, 3513 flow [2024-06-04 14:52:50,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3513, PETRI_PLACES=293, PETRI_TRANSITIONS=355} [2024-06-04 14:52:50,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-04 14:52:50,213 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 355 transitions, 3513 flow [2024-06-04 14:52:50,213 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) [2024-06-04 14:52:50,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:50,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:52:50,213 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)] === [2024-06-04 14:52:50,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2134473399, now seen corresponding path program 3 times [2024-06-04 14:52:50,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121900118] [2024-06-04 14:52:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:50,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:50,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121900118] [2024-06-04 14:52:50,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121900118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:50,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:50,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520119503] [2024-06-04 14:52:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:50,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:50,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 355 transitions, 3513 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) [2024-06-04 14:52:50,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:50,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:50,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:52,070 INFO L124 PetriNetUnfolderBase]: 3203/5093 cut-off events. [2024-06-04 14:52:52,070 INFO L125 PetriNetUnfolderBase]: For 710355/710355 co-relation queries the response was YES. [2024-06-04 14:52:52,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44456 conditions, 5093 events. 3203/5093 cut-off events. For 710355/710355 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30210 event pairs, 661 based on Foata normal form. 2/5095 useless extension candidates. Maximal degree in co-relation 44321. Up to 4919 conditions per place. [2024-06-04 14:52:52,134 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 22 changer transitions 0/377 dead transitions. [2024-06-04 14:52:52,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 377 transitions, 4395 flow [2024-06-04 14:52:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:52:52,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:52:52,135 INFO L175 Difference]: Start difference. First operand has 293 places, 355 transitions, 3513 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:52:52,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 377 transitions, 4395 flow [2024-06-04 14:52:53,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 377 transitions, 4311 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:53,841 INFO L231 Difference]: Finished difference. Result has 295 places, 358 transitions, 3555 flow [2024-06-04 14:52:53,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3555, PETRI_PLACES=295, PETRI_TRANSITIONS=358} [2024-06-04 14:52:53,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 14:52:53,842 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 358 transitions, 3555 flow [2024-06-04 14:52:53,842 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) [2024-06-04 14:52:53,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:53,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:52:53,843 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)] === [2024-06-04 14:52:53,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1385910375, now seen corresponding path program 3 times [2024-06-04 14:52:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535480252] [2024-06-04 14:52:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:54,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:54,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535480252] [2024-06-04 14:52:54,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535480252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:54,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:54,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55644399] [2024-06-04 14:52:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:54,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:54,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 358 transitions, 3555 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) [2024-06-04 14:52:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:54,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:54,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:55,636 INFO L124 PetriNetUnfolderBase]: 3213/5107 cut-off events. [2024-06-04 14:52:55,636 INFO L125 PetriNetUnfolderBase]: For 725340/725340 co-relation queries the response was YES. [2024-06-04 14:52:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44691 conditions, 5107 events. 3213/5107 cut-off events. For 725340/725340 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30343 event pairs, 664 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 44555. Up to 4915 conditions per place. [2024-06-04 14:52:55,702 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 33 changer transitions 0/380 dead transitions. [2024-06-04 14:52:55,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 380 transitions, 4415 flow [2024-06-04 14:52:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:52:55,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:52:55,703 INFO L175 Difference]: Start difference. First operand has 295 places, 358 transitions, 3555 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:52:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 380 transitions, 4415 flow [2024-06-04 14:52:57,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 380 transitions, 4319 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:57,636 INFO L231 Difference]: Finished difference. Result has 297 places, 361 transitions, 3579 flow [2024-06-04 14:52:57,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3579, PETRI_PLACES=297, PETRI_TRANSITIONS=361} [2024-06-04 14:52:57,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 14:52:57,637 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 361 transitions, 3579 flow [2024-06-04 14:52:57,637 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) [2024-06-04 14:52:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:57,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:52:57,638 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)] === [2024-06-04 14:52:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 425031641, now seen corresponding path program 4 times [2024-06-04 14:52:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477360429] [2024-06-04 14:52:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:57,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:58,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:58,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477360429] [2024-06-04 14:52:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477360429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:58,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989881880] [2024-06-04 14:52:58,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:58,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:52:58,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 361 transitions, 3579 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) [2024-06-04 14:52:58,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:58,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:52:58,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:59,832 INFO L124 PetriNetUnfolderBase]: 3208/5103 cut-off events. [2024-06-04 14:52:59,832 INFO L125 PetriNetUnfolderBase]: For 731313/731313 co-relation queries the response was YES. [2024-06-04 14:52:59,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44596 conditions, 5103 events. 3208/5103 cut-off events. For 731313/731313 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30303 event pairs, 677 based on Foata normal form. 2/5104 useless extension candidates. Maximal degree in co-relation 44459. Up to 4910 conditions per place. [2024-06-04 14:52:59,901 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 28 changer transitions 0/373 dead transitions. [2024-06-04 14:52:59,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 373 transitions, 4345 flow [2024-06-04 14:52:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:52:59,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:52:59,902 INFO L175 Difference]: Start difference. First operand has 297 places, 361 transitions, 3579 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:52:59,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 373 transitions, 4345 flow [2024-06-04 14:53:01,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 373 transitions, 4237 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:01,315 INFO L231 Difference]: Finished difference. Result has 299 places, 361 transitions, 3532 flow [2024-06-04 14:53:01,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3532, PETRI_PLACES=299, PETRI_TRANSITIONS=361} [2024-06-04 14:53:01,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 14:53:01,315 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 361 transitions, 3532 flow [2024-06-04 14:53:01,316 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) [2024-06-04 14:53:01,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:01,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:01,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:53:01,316 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)] === [2024-06-04 14:53:01,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1457189221, now seen corresponding path program 4 times [2024-06-04 14:53:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:01,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833592571] [2024-06-04 14:53:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:01,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833592571] [2024-06-04 14:53:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833592571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288884551] [2024-06-04 14:53:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:02,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:02,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 361 transitions, 3532 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) [2024-06-04 14:53:02,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:02,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:02,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:03,228 INFO L124 PetriNetUnfolderBase]: 3218/5116 cut-off events. [2024-06-04 14:53:03,228 INFO L125 PetriNetUnfolderBase]: For 746364/746368 co-relation queries the response was YES. [2024-06-04 14:53:03,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44855 conditions, 5116 events. 3218/5116 cut-off events. For 746364/746368 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30368 event pairs, 670 based on Foata normal form. 6/5122 useless extension candidates. Maximal degree in co-relation 44717. Up to 4827 conditions per place. [2024-06-04 14:53:03,295 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 44 changer transitions 0/385 dead transitions. [2024-06-04 14:53:03,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 385 transitions, 4450 flow [2024-06-04 14:53:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:53:03,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:53:03,296 INFO L175 Difference]: Start difference. First operand has 299 places, 361 transitions, 3532 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:53:03,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 385 transitions, 4450 flow [2024-06-04 14:53:05,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 385 transitions, 4361 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:05,072 INFO L231 Difference]: Finished difference. Result has 299 places, 364 transitions, 3639 flow [2024-06-04 14:53:05,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3639, PETRI_PLACES=299, PETRI_TRANSITIONS=364} [2024-06-04 14:53:05,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 14:53:05,073 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 364 transitions, 3639 flow [2024-06-04 14:53:05,073 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) [2024-06-04 14:53:05,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:05,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:05,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:53:05,073 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)] === [2024-06-04 14:53:05,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash 382040945, now seen corresponding path program 4 times [2024-06-04 14:53:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:05,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804742442] [2024-06-04 14:53:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804742442] [2024-06-04 14:53:05,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804742442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:05,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:05,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013857554] [2024-06-04 14:53:05,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:05,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:05,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:05,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:05,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 364 transitions, 3639 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) [2024-06-04 14:53:05,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:05,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:05,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:06,933 INFO L124 PetriNetUnfolderBase]: 3236/5147 cut-off events. [2024-06-04 14:53:06,933 INFO L125 PetriNetUnfolderBase]: For 769361/769365 co-relation queries the response was YES. [2024-06-04 14:53:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45771 conditions, 5147 events. 3236/5147 cut-off events. For 769361/769365 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30634 event pairs, 667 based on Foata normal form. 6/5153 useless extension candidates. Maximal degree in co-relation 45632. Up to 4801 conditions per place. [2024-06-04 14:53:06,998 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 72 changer transitions 0/400 dead transitions. [2024-06-04 14:53:06,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 400 transitions, 5070 flow [2024-06-04 14:53:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:53:06,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:53:06,999 INFO L175 Difference]: Start difference. First operand has 299 places, 364 transitions, 3639 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:53:06,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 400 transitions, 5070 flow [2024-06-04 14:53:09,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 400 transitions, 4902 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:09,164 INFO L231 Difference]: Finished difference. Result has 302 places, 377 transitions, 3855 flow [2024-06-04 14:53:09,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3855, PETRI_PLACES=302, PETRI_TRANSITIONS=377} [2024-06-04 14:53:09,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 14:53:09,165 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 377 transitions, 3855 flow [2024-06-04 14:53:09,165 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) [2024-06-04 14:53:09,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:09,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:53:09,165 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)] === [2024-06-04 14:53:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash -64503593, now seen corresponding path program 5 times [2024-06-04 14:53:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057339822] [2024-06-04 14:53:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057339822] [2024-06-04 14:53:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057339822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:09,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:09,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506379676] [2024-06-04 14:53:09,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:09,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:09,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:09,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 377 transitions, 3855 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) [2024-06-04 14:53:09,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:09,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:09,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:11,137 INFO L124 PetriNetUnfolderBase]: 3270/5198 cut-off events. [2024-06-04 14:53:11,137 INFO L125 PetriNetUnfolderBase]: For 804411/804415 co-relation queries the response was YES. [2024-06-04 14:53:11,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47341 conditions, 5198 events. 3270/5198 cut-off events. For 804411/804415 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31004 event pairs, 669 based on Foata normal form. 6/5204 useless extension candidates. Maximal degree in co-relation 47200. Up to 4758 conditions per place. [2024-06-04 14:53:11,198 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 88 changer transitions 0/410 dead transitions. [2024-06-04 14:53:11,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 410 transitions, 5633 flow [2024-06-04 14:53:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:53:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:53:11,200 INFO L175 Difference]: Start difference. First operand has 302 places, 377 transitions, 3855 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:53:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 410 transitions, 5633 flow [2024-06-04 14:53:13,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 410 transitions, 5517 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:13,703 INFO L231 Difference]: Finished difference. Result has 307 places, 386 transitions, 4233 flow [2024-06-04 14:53:13,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4233, PETRI_PLACES=307, PETRI_TRANSITIONS=386} [2024-06-04 14:53:13,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 14:53:13,703 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 386 transitions, 4233 flow [2024-06-04 14:53:13,704 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) [2024-06-04 14:53:13,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:13,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:13,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:53:13,704 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)] === [2024-06-04 14:53:13,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 609821939, now seen corresponding path program 6 times [2024-06-04 14:53:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591318420] [2024-06-04 14:53:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:13,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:14,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591318420] [2024-06-04 14:53:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591318420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:14,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355411201] [2024-06-04 14:53:14,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:14,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:14,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:14,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:14,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:14,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 386 transitions, 4233 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) [2024-06-04 14:53:14,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:14,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:14,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:15,701 INFO L124 PetriNetUnfolderBase]: 3280/5206 cut-off events. [2024-06-04 14:53:15,702 INFO L125 PetriNetUnfolderBase]: For 826670/826674 co-relation queries the response was YES. [2024-06-04 14:53:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48214 conditions, 5206 events. 3280/5206 cut-off events. For 826670/826674 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30929 event pairs, 671 based on Foata normal form. 6/5212 useless extension candidates. Maximal degree in co-relation 48071. Up to 4883 conditions per place. [2024-06-04 14:53:15,768 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 58 changer transitions 0/415 dead transitions. [2024-06-04 14:53:15,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 415 transitions, 5445 flow [2024-06-04 14:53:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:53:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:53:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 14:53:15,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 14:53:15,769 INFO L175 Difference]: Start difference. First operand has 307 places, 386 transitions, 4233 flow. Second operand 10 states and 172 transitions. [2024-06-04 14:53:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 415 transitions, 5445 flow [2024-06-04 14:53:18,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 415 transitions, 5107 flow, removed 123 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:18,325 INFO L231 Difference]: Finished difference. Result has 314 places, 389 transitions, 4136 flow [2024-06-04 14:53:18,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4136, PETRI_PLACES=314, PETRI_TRANSITIONS=389} [2024-06-04 14:53:18,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 14:53:18,326 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 389 transitions, 4136 flow [2024-06-04 14:53:18,326 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) [2024-06-04 14:53:18,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:18,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:18,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:53:18,326 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)] === [2024-06-04 14:53:18,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1568350281, now seen corresponding path program 7 times [2024-06-04 14:53:18,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:18,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674023140] [2024-06-04 14:53:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674023140] [2024-06-04 14:53:19,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674023140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:19,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448540467] [2024-06-04 14:53:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 389 transitions, 4136 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) [2024-06-04 14:53:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:19,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:19,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:20,322 INFO L124 PetriNetUnfolderBase]: 3274/5200 cut-off events. [2024-06-04 14:53:20,322 INFO L125 PetriNetUnfolderBase]: For 824005/824009 co-relation queries the response was YES. [2024-06-04 14:53:20,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47410 conditions, 5200 events. 3274/5200 cut-off events. For 824005/824009 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30914 event pairs, 668 based on Foata normal form. 6/5206 useless extension candidates. Maximal degree in co-relation 47265. Up to 4878 conditions per place. [2024-06-04 14:53:20,394 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 57 changer transitions 0/408 dead transitions. [2024-06-04 14:53:20,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 408 transitions, 5010 flow [2024-06-04 14:53:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:53:20,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:53:20,395 INFO L175 Difference]: Start difference. First operand has 314 places, 389 transitions, 4136 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:53:20,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 408 transitions, 5010 flow [2024-06-04 14:53:22,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 408 transitions, 4813 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:22,879 INFO L231 Difference]: Finished difference. Result has 314 places, 389 transitions, 4059 flow [2024-06-04 14:53:22,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3939, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4059, PETRI_PLACES=314, PETRI_TRANSITIONS=389} [2024-06-04 14:53:22,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 14:53:22,880 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 389 transitions, 4059 flow [2024-06-04 14:53:22,880 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) [2024-06-04 14:53:22,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:22,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:22,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:53:22,880 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)] === [2024-06-04 14:53:22,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 736719695, now seen corresponding path program 5 times [2024-06-04 14:53:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694928384] [2024-06-04 14:53:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:23,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:23,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694928384] [2024-06-04 14:53:23,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694928384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:23,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:23,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:23,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810989591] [2024-06-04 14:53:23,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:23,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:23,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:23,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:23,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 389 transitions, 4059 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) [2024-06-04 14:53:23,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:23,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:23,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:24,776 INFO L124 PetriNetUnfolderBase]: 3300/5240 cut-off events. [2024-06-04 14:53:24,776 INFO L125 PetriNetUnfolderBase]: For 848932/848936 co-relation queries the response was YES. [2024-06-04 14:53:24,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47842 conditions, 5240 events. 3300/5240 cut-off events. For 848932/848936 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31210 event pairs, 669 based on Foata normal form. 6/5246 useless extension candidates. Maximal degree in co-relation 47696. Up to 4879 conditions per place. [2024-06-04 14:53:24,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 80 changer transitions 0/416 dead transitions. [2024-06-04 14:53:24,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 416 transitions, 5440 flow [2024-06-04 14:53:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:53:24,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:53:24,853 INFO L175 Difference]: Start difference. First operand has 314 places, 389 transitions, 4059 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:53:24,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 416 transitions, 5440 flow [2024-06-04 14:53:28,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 416 transitions, 5326 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:28,087 INFO L231 Difference]: Finished difference. Result has 315 places, 396 transitions, 4194 flow [2024-06-04 14:53:28,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4194, PETRI_PLACES=315, PETRI_TRANSITIONS=396} [2024-06-04 14:53:28,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 14:53:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 396 transitions, 4194 flow [2024-06-04 14:53:28,088 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) [2024-06-04 14:53:28,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:28,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:28,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:53:28,088 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)] === [2024-06-04 14:53:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1165001073, now seen corresponding path program 6 times [2024-06-04 14:53:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233740837] [2024-06-04 14:53:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:28,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233740837] [2024-06-04 14:53:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233740837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10983937] [2024-06-04 14:53:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:28,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:28,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:28,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 396 transitions, 4194 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) [2024-06-04 14:53:28,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:28,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:30,124 INFO L124 PetriNetUnfolderBase]: 3294/5238 cut-off events. [2024-06-04 14:53:30,124 INFO L125 PetriNetUnfolderBase]: For 855507/855511 co-relation queries the response was YES. [2024-06-04 14:53:30,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47839 conditions, 5238 events. 3294/5238 cut-off events. For 855507/855511 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31291 event pairs, 670 based on Foata normal form. 6/5244 useless extension candidates. Maximal degree in co-relation 47692. Up to 4874 conditions per place. [2024-06-04 14:53:30,187 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 78 changer transitions 0/415 dead transitions. [2024-06-04 14:53:30,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 415 transitions, 5296 flow [2024-06-04 14:53:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:53:30,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:53:30,188 INFO L175 Difference]: Start difference. First operand has 315 places, 396 transitions, 4194 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:53:30,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 415 transitions, 5296 flow [2024-06-04 14:53:33,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 415 transitions, 5151 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:33,638 INFO L231 Difference]: Finished difference. Result has 319 places, 396 transitions, 4211 flow [2024-06-04 14:53:33,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4211, PETRI_PLACES=319, PETRI_TRANSITIONS=396} [2024-06-04 14:53:33,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 14:53:33,638 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 396 transitions, 4211 flow [2024-06-04 14:53:33,639 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) [2024-06-04 14:53:33,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:33,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:33,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:53:33,639 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)] === [2024-06-04 14:53:33,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 736540949, now seen corresponding path program 8 times [2024-06-04 14:53:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114429642] [2024-06-04 14:53:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114429642] [2024-06-04 14:53:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114429642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:34,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834047720] [2024-06-04 14:53:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:34,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:34,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:34,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 396 transitions, 4211 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) [2024-06-04 14:53:34,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:34,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:34,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:35,511 INFO L124 PetriNetUnfolderBase]: 3320/5276 cut-off events. [2024-06-04 14:53:35,511 INFO L125 PetriNetUnfolderBase]: For 882807/882811 co-relation queries the response was YES. [2024-06-04 14:53:35,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48594 conditions, 5276 events. 3320/5276 cut-off events. For 882807/882811 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31530 event pairs, 669 based on Foata normal form. 6/5282 useless extension candidates. Maximal degree in co-relation 48446. Up to 4816 conditions per place. [2024-06-04 14:53:35,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 101 changer transitions 0/422 dead transitions. [2024-06-04 14:53:35,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 422 transitions, 5693 flow [2024-06-04 14:53:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:53:35,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:53:35,592 INFO L175 Difference]: Start difference. First operand has 319 places, 396 transitions, 4211 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:53:35,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 422 transitions, 5693 flow [2024-06-04 14:53:38,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 422 transitions, 5561 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:38,942 INFO L231 Difference]: Finished difference. Result has 322 places, 402 transitions, 4451 flow [2024-06-04 14:53:38,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4451, PETRI_PLACES=322, PETRI_TRANSITIONS=402} [2024-06-04 14:53:38,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 14:53:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 402 transitions, 4451 flow [2024-06-04 14:53:38,943 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) [2024-06-04 14:53:38,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:38,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:53:38,943 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)] === [2024-06-04 14:53:38,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash 736303799, now seen corresponding path program 9 times [2024-06-04 14:53:38,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:38,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388565659] [2024-06-04 14:53:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:38,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:39,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388565659] [2024-06-04 14:53:39,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388565659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:39,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977045403] [2024-06-04 14:53:39,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:39,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:39,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:39,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:39,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 402 transitions, 4451 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) [2024-06-04 14:53:39,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:39,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:39,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:40,872 INFO L124 PetriNetUnfolderBase]: 3314/5264 cut-off events. [2024-06-04 14:53:40,872 INFO L125 PetriNetUnfolderBase]: For 890093/890097 co-relation queries the response was YES. [2024-06-04 14:53:40,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48582 conditions, 5264 events. 3314/5264 cut-off events. For 890093/890097 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31447 event pairs, 668 based on Foata normal form. 6/5270 useless extension candidates. Maximal degree in co-relation 48433. Up to 4811 conditions per place. [2024-06-04 14:53:40,953 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 100 changer transitions 0/421 dead transitions. [2024-06-04 14:53:40,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 421 transitions, 5569 flow [2024-06-04 14:53:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:53:40,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:53:40,954 INFO L175 Difference]: Start difference. First operand has 322 places, 402 transitions, 4451 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:53:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 421 transitions, 5569 flow [2024-06-04 14:53:44,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 421 transitions, 5294 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:44,668 INFO L231 Difference]: Finished difference. Result has 325 places, 402 transitions, 4382 flow [2024-06-04 14:53:44,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4382, PETRI_PLACES=325, PETRI_TRANSITIONS=402} [2024-06-04 14:53:44,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-04 14:53:44,669 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 402 transitions, 4382 flow [2024-06-04 14:53:44,669 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) [2024-06-04 14:53:44,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:44,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:44,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:53:44,669 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)] === [2024-06-04 14:53:44,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 597529311, now seen corresponding path program 7 times [2024-06-04 14:53:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:44,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255443504] [2024-06-04 14:53:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:44,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:45,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:45,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255443504] [2024-06-04 14:53:45,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255443504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:45,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:45,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:45,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144144755] [2024-06-04 14:53:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:45,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:45,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:45,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 402 transitions, 4382 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) [2024-06-04 14:53:45,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:45,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:46,592 INFO L124 PetriNetUnfolderBase]: 3324/5276 cut-off events. [2024-06-04 14:53:46,592 INFO L125 PetriNetUnfolderBase]: For 905785/905789 co-relation queries the response was YES. [2024-06-04 14:53:46,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48609 conditions, 5276 events. 3324/5276 cut-off events. For 905785/905789 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 31484 event pairs, 668 based on Foata normal form. 6/5282 useless extension candidates. Maximal degree in co-relation 48460. Up to 5015 conditions per place. [2024-06-04 14:53:46,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 51 changer transitions 0/421 dead transitions. [2024-06-04 14:53:46,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 421 transitions, 5727 flow [2024-06-04 14:53:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 14:53:46,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 14:53:46,668 INFO L175 Difference]: Start difference. First operand has 325 places, 402 transitions, 4382 flow. Second operand 8 states and 137 transitions. [2024-06-04 14:53:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 421 transitions, 5727 flow [2024-06-04 14:53:50,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 421 transitions, 5515 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:50,049 INFO L231 Difference]: Finished difference. Result has 326 places, 405 transitions, 4319 flow [2024-06-04 14:53:50,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4319, PETRI_PLACES=326, PETRI_TRANSITIONS=405} [2024-06-04 14:53:50,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 14:53:50,049 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 405 transitions, 4319 flow [2024-06-04 14:53:50,049 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) [2024-06-04 14:53:50,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:50,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:50,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:53:50,049 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)] === [2024-06-04 14:53:50,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:50,050 INFO L85 PathProgramCache]: Analyzing trace with hash -838997321, now seen corresponding path program 10 times [2024-06-04 14:53:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:50,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855028547] [2024-06-04 14:53:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:50,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855028547] [2024-06-04 14:53:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855028547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265073699] [2024-06-04 14:53:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:50,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:50,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 405 transitions, 4319 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) [2024-06-04 14:53:50,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:50,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:50,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:51,952 INFO L124 PetriNetUnfolderBase]: 3334/5298 cut-off events. [2024-06-04 14:53:51,952 INFO L125 PetriNetUnfolderBase]: For 922349/922353 co-relation queries the response was YES. [2024-06-04 14:53:52,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48758 conditions, 5298 events. 3334/5298 cut-off events. For 922349/922353 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31693 event pairs, 670 based on Foata normal form. 6/5304 useless extension candidates. Maximal degree in co-relation 48608. Up to 5056 conditions per place. [2024-06-04 14:53:52,024 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 39 changer transitions 0/424 dead transitions. [2024-06-04 14:53:52,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 424 transitions, 5712 flow [2024-06-04 14:53:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:53:52,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:53:52,025 INFO L175 Difference]: Start difference. First operand has 326 places, 405 transitions, 4319 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:53:52,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 424 transitions, 5712 flow [2024-06-04 14:53:55,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 424 transitions, 5560 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:55,503 INFO L231 Difference]: Finished difference. Result has 329 places, 408 transitions, 4330 flow [2024-06-04 14:53:55,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4330, PETRI_PLACES=329, PETRI_TRANSITIONS=408} [2024-06-04 14:53:55,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-04 14:53:55,503 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 408 transitions, 4330 flow [2024-06-04 14:53:55,503 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) [2024-06-04 14:53:55,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:55,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:55,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:53:55,504 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)] === [2024-06-04 14:53:55,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash -838581425, now seen corresponding path program 8 times [2024-06-04 14:53:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:55,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197443954] [2024-06-04 14:53:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:55,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:56,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197443954] [2024-06-04 14:53:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197443954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:56,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:56,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258935107] [2024-06-04 14:53:56,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:56,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:56,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:56,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 408 transitions, 4330 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) [2024-06-04 14:53:56,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:56,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:56,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:57,514 INFO L124 PetriNetUnfolderBase]: 3360/5336 cut-off events. [2024-06-04 14:53:57,514 INFO L125 PetriNetUnfolderBase]: For 949076/949080 co-relation queries the response was YES. [2024-06-04 14:53:57,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49293 conditions, 5336 events. 3360/5336 cut-off events. For 949076/949080 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31953 event pairs, 664 based on Foata normal form. 6/5342 useless extension candidates. Maximal degree in co-relation 49142. Up to 5054 conditions per place. [2024-06-04 14:53:57,579 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 59 changer transitions 0/431 dead transitions. [2024-06-04 14:53:57,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 431 transitions, 5760 flow [2024-06-04 14:53:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 14:53:57,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 14:53:57,580 INFO L175 Difference]: Start difference. First operand has 329 places, 408 transitions, 4330 flow. Second operand 8 states and 137 transitions. [2024-06-04 14:53:57,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 431 transitions, 5760 flow [2024-06-04 14:54:00,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 431 transitions, 5544 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:00,703 INFO L231 Difference]: Finished difference. Result has 331 places, 415 transitions, 4336 flow [2024-06-04 14:54:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4114, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4336, PETRI_PLACES=331, PETRI_TRANSITIONS=415} [2024-06-04 14:54:00,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-04 14:54:00,704 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 415 transitions, 4336 flow [2024-06-04 14:54:00,704 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) [2024-06-04 14:54:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:54:00,704 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)] === [2024-06-04 14:54:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -616394195, now seen corresponding path program 9 times [2024-06-04 14:54:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258477400] [2024-06-04 14:54:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:01,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258477400] [2024-06-04 14:54:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258477400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771129395] [2024-06-04 14:54:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:01,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:01,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 415 transitions, 4336 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) [2024-06-04 14:54:01,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:01,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:01,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:02,595 INFO L124 PetriNetUnfolderBase]: 3370/5346 cut-off events. [2024-06-04 14:54:02,595 INFO L125 PetriNetUnfolderBase]: For 964678/964682 co-relation queries the response was YES. [2024-06-04 14:54:02,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49513 conditions, 5346 events. 3370/5346 cut-off events. For 964678/964682 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31948 event pairs, 677 based on Foata normal form. 6/5352 useless extension candidates. Maximal degree in co-relation 49361. Up to 5148 conditions per place. [2024-06-04 14:54:02,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 30 changer transitions 0/431 dead transitions. [2024-06-04 14:54:02,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 431 transitions, 5301 flow [2024-06-04 14:54:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:54:02,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:54:02,674 INFO L175 Difference]: Start difference. First operand has 331 places, 415 transitions, 4336 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:54:02,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 431 transitions, 5301 flow [2024-06-04 14:54:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 431 transitions, 5203 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:06,282 INFO L231 Difference]: Finished difference. Result has 335 places, 419 transitions, 4383 flow [2024-06-04 14:54:06,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4383, PETRI_PLACES=335, PETRI_TRANSITIONS=419} [2024-06-04 14:54:06,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-04 14:54:06,283 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 419 transitions, 4383 flow [2024-06-04 14:54:06,283 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) [2024-06-04 14:54:06,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:06,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:54:06,283 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)] === [2024-06-04 14:54:06,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash -838760171, now seen corresponding path program 11 times [2024-06-04 14:54:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544336365] [2024-06-04 14:54:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:07,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:07,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544336365] [2024-06-04 14:54:07,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544336365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:07,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:07,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789138793] [2024-06-04 14:54:07,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:07,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:07,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 419 transitions, 4383 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) [2024-06-04 14:54:07,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:07,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:07,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:08,203 INFO L124 PetriNetUnfolderBase]: 3364/5340 cut-off events. [2024-06-04 14:54:08,203 INFO L125 PetriNetUnfolderBase]: For 970967/970971 co-relation queries the response was YES. [2024-06-04 14:54:08,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49298 conditions, 5340 events. 3364/5340 cut-off events. For 970967/970971 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31901 event pairs, 661 based on Foata normal form. 6/5346 useless extension candidates. Maximal degree in co-relation 49145. Up to 5101 conditions per place. [2024-06-04 14:54:08,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 41 changer transitions 0/434 dead transitions. [2024-06-04 14:54:08,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 434 transitions, 5517 flow [2024-06-04 14:54:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:54:08,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:54:08,281 INFO L175 Difference]: Start difference. First operand has 335 places, 419 transitions, 4383 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:54:08,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 434 transitions, 5517 flow [2024-06-04 14:54:11,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 434 transitions, 5363 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:11,769 INFO L231 Difference]: Finished difference. Result has 337 places, 419 transitions, 4317 flow [2024-06-04 14:54:11,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=337, PETRI_TRANSITIONS=419} [2024-06-04 14:54:11,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-04 14:54:11,769 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 419 transitions, 4317 flow [2024-06-04 14:54:11,769 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) [2024-06-04 14:54:11,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:11,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:11,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:54:11,770 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)] === [2024-06-04 14:54:11,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1016248997, now seen corresponding path program 4 times [2024-06-04 14:54:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848329725] [2024-06-04 14:54:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848329725] [2024-06-04 14:54:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848329725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496190696] [2024-06-04 14:54:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:12,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:12,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 419 transitions, 4317 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) [2024-06-04 14:54:12,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:12,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:13,848 INFO L124 PetriNetUnfolderBase]: 3361/5327 cut-off events. [2024-06-04 14:54:13,848 INFO L125 PetriNetUnfolderBase]: For 976435/976435 co-relation queries the response was YES. [2024-06-04 14:54:13,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49226 conditions, 5327 events. 3361/5327 cut-off events. For 976435/976435 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31744 event pairs, 681 based on Foata normal form. 1/5327 useless extension candidates. Maximal degree in co-relation 49073. Up to 5127 conditions per place. [2024-06-04 14:54:13,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 29 changer transitions 0/430 dead transitions. [2024-06-04 14:54:13,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 430 transitions, 5195 flow [2024-06-04 14:54:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:54:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:54:13,922 INFO L175 Difference]: Start difference. First operand has 337 places, 419 transitions, 4317 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:54:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 430 transitions, 5195 flow [2024-06-04 14:54:17,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 430 transitions, 5093 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:17,191 INFO L231 Difference]: Finished difference. Result has 339 places, 419 transitions, 4279 flow [2024-06-04 14:54:17,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4279, PETRI_PLACES=339, PETRI_TRANSITIONS=419} [2024-06-04 14:54:17,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 14:54:17,192 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 419 transitions, 4279 flow [2024-06-04 14:54:17,192 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) [2024-06-04 14:54:17,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:17,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:17,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:54:17,192 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)] === [2024-06-04 14:54:17,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -610680275, now seen corresponding path program 10 times [2024-06-04 14:54:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473703901] [2024-06-04 14:54:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473703901] [2024-06-04 14:54:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473703901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:17,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:17,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766415795] [2024-06-04 14:54:17,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:17,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:17,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:17,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 419 transitions, 4279 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) [2024-06-04 14:54:17,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:17,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:17,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:19,068 INFO L124 PetriNetUnfolderBase]: 3355/5322 cut-off events. [2024-06-04 14:54:19,068 INFO L125 PetriNetUnfolderBase]: For 987502/987506 co-relation queries the response was YES. [2024-06-04 14:54:19,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49063 conditions, 5322 events. 3355/5322 cut-off events. For 987502/987506 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31773 event pairs, 673 based on Foata normal form. 6/5328 useless extension candidates. Maximal degree in co-relation 48909. Up to 5104 conditions per place. [2024-06-04 14:54:19,145 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 41 changer transitions 0/433 dead transitions. [2024-06-04 14:54:19,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 433 transitions, 5403 flow [2024-06-04 14:54:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:54:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:54:19,146 INFO L175 Difference]: Start difference. First operand has 339 places, 419 transitions, 4279 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:54:19,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 433 transitions, 5403 flow [2024-06-04 14:54:22,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 433 transitions, 5291 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:22,773 INFO L231 Difference]: Finished difference. Result has 339 places, 419 transitions, 4255 flow [2024-06-04 14:54:22,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4255, PETRI_PLACES=339, PETRI_TRANSITIONS=419} [2024-06-04 14:54:22,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 14:54:22,774 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 419 transitions, 4255 flow [2024-06-04 14:54:22,774 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) [2024-06-04 14:54:22,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:22,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:22,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:54:22,774 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)] === [2024-06-04 14:54:22,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1016128841, now seen corresponding path program 12 times [2024-06-04 14:54:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:22,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257216777] [2024-06-04 14:54:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257216777] [2024-06-04 14:54:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257216777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283988342] [2024-06-04 14:54:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:23,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 419 transitions, 4255 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) [2024-06-04 14:54:23,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:23,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:23,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:24,788 INFO L124 PetriNetUnfolderBase]: 3349/5318 cut-off events. [2024-06-04 14:54:24,788 INFO L125 PetriNetUnfolderBase]: For 988544/988548 co-relation queries the response was YES. [2024-06-04 14:54:24,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48549 conditions, 5318 events. 3349/5318 cut-off events. For 988544/988548 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31803 event pairs, 672 based on Foata normal form. 6/5324 useless extension candidates. Maximal degree in co-relation 48395. Up to 5124 conditions per place. [2024-06-04 14:54:24,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 22 changer transitions 0/432 dead transitions. [2024-06-04 14:54:24,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 432 transitions, 5161 flow [2024-06-04 14:54:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:54:24,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:54:24,859 INFO L175 Difference]: Start difference. First operand has 339 places, 419 transitions, 4255 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:54:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 432 transitions, 5161 flow [2024-06-04 14:54:28,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 432 transitions, 5001 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:28,690 INFO L231 Difference]: Finished difference. Result has 340 places, 419 transitions, 4145 flow [2024-06-04 14:54:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4145, PETRI_PLACES=340, PETRI_TRANSITIONS=419} [2024-06-04 14:54:28,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 14:54:28,690 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 419 transitions, 4145 flow [2024-06-04 14:54:28,690 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) [2024-06-04 14:54:28,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:28,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:54:28,690 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)] === [2024-06-04 14:54:28,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash 895514029, now seen corresponding path program 11 times [2024-06-04 14:54:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570082371] [2024-06-04 14:54:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:29,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:29,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570082371] [2024-06-04 14:54:29,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570082371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:29,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:29,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439108544] [2024-06-04 14:54:29,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:29,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:29,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:29,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 419 transitions, 4145 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) [2024-06-04 14:54:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:29,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:30,728 INFO L124 PetriNetUnfolderBase]: 3343/5308 cut-off events. [2024-06-04 14:54:30,728 INFO L125 PetriNetUnfolderBase]: For 993014/993018 co-relation queries the response was YES. [2024-06-04 14:54:30,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48289 conditions, 5308 events. 3343/5308 cut-off events. For 993014/993018 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31687 event pairs, 667 based on Foata normal form. 6/5314 useless extension candidates. Maximal degree in co-relation 48134. Up to 5089 conditions per place. [2024-06-04 14:54:30,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 37 changer transitions 0/433 dead transitions. [2024-06-04 14:54:30,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 433 transitions, 5273 flow [2024-06-04 14:54:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:54:30,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:54:30,793 INFO L175 Difference]: Start difference. First operand has 340 places, 419 transitions, 4145 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:54:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 433 transitions, 5273 flow [2024-06-04 14:54:35,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 433 transitions, 5149 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 14:54:35,117 INFO L231 Difference]: Finished difference. Result has 339 places, 419 transitions, 4101 flow [2024-06-04 14:54:35,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4101, PETRI_PLACES=339, PETRI_TRANSITIONS=419} [2024-06-04 14:54:35,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 14:54:35,117 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 419 transitions, 4101 flow [2024-06-04 14:54:35,117 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) [2024-06-04 14:54:35,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:35,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:54:35,117 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)] === [2024-06-04 14:54:35,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1015891505, now seen corresponding path program 12 times [2024-06-04 14:54:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292956032] [2024-06-04 14:54:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292956032] [2024-06-04 14:54:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292956032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:35,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506548221] [2024-06-04 14:54:35,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:35,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:35,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:35,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:35,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:35,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 419 transitions, 4101 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) [2024-06-04 14:54:35,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:35,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:35,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:37,073 INFO L124 PetriNetUnfolderBase]: 3337/5300 cut-off events. [2024-06-04 14:54:37,074 INFO L125 PetriNetUnfolderBase]: For 997577/997581 co-relation queries the response was YES. [2024-06-04 14:54:37,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48155 conditions, 5300 events. 3337/5300 cut-off events. For 997577/997581 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31665 event pairs, 674 based on Foata normal form. 6/5306 useless extension candidates. Maximal degree in co-relation 47999. Up to 5104 conditions per place. [2024-06-04 14:54:37,148 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 29 changer transitions 0/431 dead transitions. [2024-06-04 14:54:37,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 431 transitions, 4993 flow [2024-06-04 14:54:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:54:37,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:54:37,149 INFO L175 Difference]: Start difference. First operand has 339 places, 419 transitions, 4101 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:54:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 431 transitions, 4993 flow [2024-06-04 14:54:40,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 431 transitions, 4869 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:40,703 INFO L231 Difference]: Finished difference. Result has 341 places, 419 transitions, 4041 flow [2024-06-04 14:54:40,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4041, PETRI_PLACES=341, PETRI_TRANSITIONS=419} [2024-06-04 14:54:40,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-04 14:54:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 419 transitions, 4041 flow [2024-06-04 14:54:40,703 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) [2024-06-04 14:54:40,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:40,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:54:40,704 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)] === [2024-06-04 14:54:40,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 618401747, now seen corresponding path program 1 times [2024-06-04 14:54:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584272448] [2024-06-04 14:54:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:40,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:41,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584272448] [2024-06-04 14:54:41,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584272448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:41,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:41,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573714526] [2024-06-04 14:54:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:41,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:54:41,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 419 transitions, 4041 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:41,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:41,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:54:41,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:43,008 INFO L124 PetriNetUnfolderBase]: 3214/5178 cut-off events. [2024-06-04 14:54:43,008 INFO L125 PetriNetUnfolderBase]: For 878646/878656 co-relation queries the response was YES. [2024-06-04 14:54:43,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45339 conditions, 5178 events. 3214/5178 cut-off events. For 878646/878656 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 31660 event pairs, 572 based on Foata normal form. 2/5170 useless extension candidates. Maximal degree in co-relation 45182. Up to 4839 conditions per place. [2024-06-04 14:54:43,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 396 selfloop transitions, 28 changer transitions 0/451 dead transitions. [2024-06-04 14:54:43,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 451 transitions, 5307 flow [2024-06-04 14:54:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:54:43,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 14:54:43,086 INFO L175 Difference]: Start difference. First operand has 341 places, 419 transitions, 4041 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:54:43,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 451 transitions, 5307 flow [2024-06-04 14:54:45,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 451 transitions, 5217 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:45,534 INFO L231 Difference]: Finished difference. Result has 343 places, 423 transitions, 4144 flow [2024-06-04 14:54:45,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4144, PETRI_PLACES=343, PETRI_TRANSITIONS=423} [2024-06-04 14:54:45,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-04 14:54:45,534 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 423 transitions, 4144 flow [2024-06-04 14:54:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:45,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:45,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:45,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:54:45,534 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)] === [2024-06-04 14:54:45,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash 618462321, now seen corresponding path program 1 times [2024-06-04 14:54:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:45,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788134345] [2024-06-04 14:54:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788134345] [2024-06-04 14:54:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788134345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:46,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20053402] [2024-06-04 14:54:46,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:46,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:54:46,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 423 transitions, 4144 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:46,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:46,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:54:46,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:47,764 INFO L124 PetriNetUnfolderBase]: 3247/5227 cut-off events. [2024-06-04 14:54:47,764 INFO L125 PetriNetUnfolderBase]: For 915227/915237 co-relation queries the response was YES. [2024-06-04 14:54:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46446 conditions, 5227 events. 3247/5227 cut-off events. For 915227/915237 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31979 event pairs, 606 based on Foata normal form. 2/5219 useless extension candidates. Maximal degree in co-relation 46288. Up to 4899 conditions per place. [2024-06-04 14:54:47,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 30 changer transitions 0/455 dead transitions. [2024-06-04 14:54:47,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 455 transitions, 5428 flow [2024-06-04 14:54:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 14:54:47,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-04 14:54:47,837 INFO L175 Difference]: Start difference. First operand has 343 places, 423 transitions, 4144 flow. Second operand 10 states and 177 transitions. [2024-06-04 14:54:47,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 455 transitions, 5428 flow [2024-06-04 14:54:51,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 455 transitions, 5314 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:51,701 INFO L231 Difference]: Finished difference. Result has 347 places, 429 transitions, 4238 flow [2024-06-04 14:54:51,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4238, PETRI_PLACES=347, PETRI_TRANSITIONS=429} [2024-06-04 14:54:51,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-04 14:54:51,701 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 429 transitions, 4238 flow [2024-06-04 14:54:51,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:51,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:51,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:54:51,701 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)] === [2024-06-04 14:54:51,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash 171917845, now seen corresponding path program 2 times [2024-06-04 14:54:51,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:51,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742058101] [2024-06-04 14:54:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:52,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742058101] [2024-06-04 14:54:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742058101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:52,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199743765] [2024-06-04 14:54:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:54:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 429 transitions, 4238 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:54:52,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:54,008 INFO L124 PetriNetUnfolderBase]: 3242/5222 cut-off events. [2024-06-04 14:54:54,008 INFO L125 PetriNetUnfolderBase]: For 920781/920791 co-relation queries the response was YES. [2024-06-04 14:54:54,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46578 conditions, 5222 events. 3242/5222 cut-off events. For 920781/920791 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31980 event pairs, 605 based on Foata normal form. 2/5214 useless extension candidates. Maximal degree in co-relation 46418. Up to 4909 conditions per place. [2024-06-04 14:54:54,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 25 changer transitions 0/452 dead transitions. [2024-06-04 14:54:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 452 transitions, 5144 flow [2024-06-04 14:54:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 14:54:54,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:54,082 INFO L175 Difference]: Start difference. First operand has 347 places, 429 transitions, 4238 flow. Second operand 10 states and 170 transitions. [2024-06-04 14:54:54,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 452 transitions, 5144 flow [2024-06-04 14:54:57,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 452 transitions, 5012 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:57,200 INFO L231 Difference]: Finished difference. Result has 351 places, 429 transitions, 4162 flow [2024-06-04 14:54:57,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4162, PETRI_PLACES=351, PETRI_TRANSITIONS=429} [2024-06-04 14:54:57,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-04 14:54:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 429 transitions, 4162 flow [2024-06-04 14:54:57,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:54:57,201 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)] === [2024-06-04 14:54:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash 621258831, now seen corresponding path program 2 times [2024-06-04 14:54:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557355548] [2024-06-04 14:54:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557355548] [2024-06-04 14:54:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557355548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944691225] [2024-06-04 14:54:58,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:58,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:58,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:54:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 429 transitions, 4162 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:54:58,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:58,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:54:58,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:59,463 INFO L124 PetriNetUnfolderBase]: 3252/5236 cut-off events. [2024-06-04 14:54:59,463 INFO L125 PetriNetUnfolderBase]: For 935032/935042 co-relation queries the response was YES. [2024-06-04 14:54:59,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46704 conditions, 5236 events. 3252/5236 cut-off events. For 935032/935042 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32077 event pairs, 604 based on Foata normal form. 2/5228 useless extension candidates. Maximal degree in co-relation 46542. Up to 4920 conditions per place. [2024-06-04 14:54:59,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 25 changer transitions 0/454 dead transitions. [2024-06-04 14:54:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 454 transitions, 5362 flow [2024-06-04 14:54:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:54:59,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:54:59,539 INFO L175 Difference]: Start difference. First operand has 351 places, 429 transitions, 4162 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:54:59,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 454 transitions, 5362 flow [2024-06-04 14:55:03,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 454 transitions, 5307 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:03,191 INFO L231 Difference]: Finished difference. Result has 351 places, 432 transitions, 4223 flow [2024-06-04 14:55:03,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4223, PETRI_PLACES=351, PETRI_TRANSITIONS=432} [2024-06-04 14:55:03,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-04 14:55:03,192 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 432 transitions, 4223 flow [2024-06-04 14:55:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:03,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:03,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:55:03,192 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)] === [2024-06-04 14:55:03,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 621263481, now seen corresponding path program 3 times [2024-06-04 14:55:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:03,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727641141] [2024-06-04 14:55:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:04,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727641141] [2024-06-04 14:55:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727641141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:04,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:04,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029355682] [2024-06-04 14:55:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:04,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:04,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:04,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 432 transitions, 4223 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:04,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:04,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:04,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:05,540 INFO L124 PetriNetUnfolderBase]: 3246/5228 cut-off events. [2024-06-04 14:55:05,540 INFO L125 PetriNetUnfolderBase]: For 936994/937004 co-relation queries the response was YES. [2024-06-04 14:55:05,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46542 conditions, 5228 events. 3246/5228 cut-off events. For 936994/937004 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32000 event pairs, 604 based on Foata normal form. 2/5220 useless extension candidates. Maximal degree in co-relation 46379. Up to 4924 conditions per place. [2024-06-04 14:55:05,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 20 changer transitions 0/452 dead transitions. [2024-06-04 14:55:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 452 transitions, 5125 flow [2024-06-04 14:55:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:55:05,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:55:05,617 INFO L175 Difference]: Start difference. First operand has 351 places, 432 transitions, 4223 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:55:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 452 transitions, 5125 flow [2024-06-04 14:55:09,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 452 transitions, 4983 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:09,870 INFO L231 Difference]: Finished difference. Result has 353 places, 432 transitions, 4127 flow [2024-06-04 14:55:09,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4127, PETRI_PLACES=353, PETRI_TRANSITIONS=432} [2024-06-04 14:55:09,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 14:55:09,870 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 432 transitions, 4127 flow [2024-06-04 14:55:09,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:09,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:09,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:09,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:55:09,871 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)] === [2024-06-04 14:55:09,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 290183279, now seen corresponding path program 4 times [2024-06-04 14:55:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:09,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884051557] [2024-06-04 14:55:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:09,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:10,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:10,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884051557] [2024-06-04 14:55:10,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884051557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:10,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:10,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:10,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497083476] [2024-06-04 14:55:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:10,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:10,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:10,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:10,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 432 transitions, 4127 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:10,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:10,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:12,001 INFO L124 PetriNetUnfolderBase]: 3251/5236 cut-off events. [2024-06-04 14:55:12,001 INFO L125 PetriNetUnfolderBase]: For 954670/954680 co-relation queries the response was YES. [2024-06-04 14:55:12,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46456 conditions, 5236 events. 3251/5236 cut-off events. For 954670/954680 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32152 event pairs, 603 based on Foata normal form. 3/5229 useless extension candidates. Maximal degree in co-relation 46292. Up to 4833 conditions per place. [2024-06-04 14:55:12,079 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 64 changer transitions 0/459 dead transitions. [2024-06-04 14:55:12,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 459 transitions, 5455 flow [2024-06-04 14:55:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:55:12,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:55:12,080 INFO L175 Difference]: Start difference. First operand has 353 places, 432 transitions, 4127 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:55:12,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 459 transitions, 5455 flow [2024-06-04 14:55:16,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 459 transitions, 5405 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:16,630 INFO L231 Difference]: Finished difference. Result has 355 places, 438 transitions, 4408 flow [2024-06-04 14:55:16,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4408, PETRI_PLACES=355, PETRI_TRANSITIONS=438} [2024-06-04 14:55:16,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-04 14:55:16,630 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 438 transitions, 4408 flow [2024-06-04 14:55:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:16,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:16,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:16,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:55:16,631 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)] === [2024-06-04 14:55:16,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:16,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1321932191, now seen corresponding path program 3 times [2024-06-04 14:55:16,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:16,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996898421] [2024-06-04 14:55:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:16,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:17,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:17,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996898421] [2024-06-04 14:55:17,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996898421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:17,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:17,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479722274] [2024-06-04 14:55:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:17,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:17,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 438 transitions, 4408 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:17,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:17,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:17,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:18,896 INFO L124 PetriNetUnfolderBase]: 3259/5248 cut-off events. [2024-06-04 14:55:18,896 INFO L125 PetriNetUnfolderBase]: For 968752/968762 co-relation queries the response was YES. [2024-06-04 14:55:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47393 conditions, 5248 events. 3259/5248 cut-off events. For 968752/968762 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32178 event pairs, 607 based on Foata normal form. 2/5238 useless extension candidates. Maximal degree in co-relation 47227. Up to 4932 conditions per place. [2024-06-04 14:55:18,969 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 31 changer transitions 0/456 dead transitions. [2024-06-04 14:55:18,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 456 transitions, 5376 flow [2024-06-04 14:55:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 14:55:18,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 14:55:18,970 INFO L175 Difference]: Start difference. First operand has 355 places, 438 transitions, 4408 flow. Second operand 9 states and 154 transitions. [2024-06-04 14:55:18,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 456 transitions, 5376 flow [2024-06-04 14:55:22,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 456 transitions, 5263 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:22,410 INFO L231 Difference]: Finished difference. Result has 359 places, 440 transitions, 4438 flow [2024-06-04 14:55:22,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4295, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4438, PETRI_PLACES=359, PETRI_TRANSITIONS=440} [2024-06-04 14:55:22,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-04 14:55:22,411 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 440 transitions, 4438 flow [2024-06-04 14:55:22,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:22,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:22,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:22,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:55:22,411 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)] === [2024-06-04 14:55:22,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 736550001, now seen corresponding path program 5 times [2024-06-04 14:55:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:22,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432194671] [2024-06-04 14:55:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:23,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432194671] [2024-06-04 14:55:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432194671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:23,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100030528] [2024-06-04 14:55:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:23,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:23,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 440 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:23,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:23,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:23,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:24,825 INFO L124 PetriNetUnfolderBase]: 3286/5282 cut-off events. [2024-06-04 14:55:24,826 INFO L125 PetriNetUnfolderBase]: For 990660/990670 co-relation queries the response was YES. [2024-06-04 14:55:24,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47999 conditions, 5282 events. 3286/5282 cut-off events. For 990660/990670 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32347 event pairs, 604 based on Foata normal form. 2/5274 useless extension candidates. Maximal degree in co-relation 47831. Up to 4878 conditions per place. [2024-06-04 14:55:24,894 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 64 changer transitions 0/465 dead transitions. [2024-06-04 14:55:24,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 465 transitions, 5458 flow [2024-06-04 14:55:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-04 14:55:24,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-04 14:55:24,895 INFO L175 Difference]: Start difference. First operand has 359 places, 440 transitions, 4438 flow. Second operand 10 states and 179 transitions. [2024-06-04 14:55:24,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 465 transitions, 5458 flow [2024-06-04 14:55:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 465 transitions, 5331 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:28,422 INFO L231 Difference]: Finished difference. Result has 362 places, 443 transitions, 4534 flow [2024-06-04 14:55:28,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4534, PETRI_PLACES=362, PETRI_TRANSITIONS=443} [2024-06-04 14:55:28,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-04 14:55:28,422 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 443 transitions, 4534 flow [2024-06-04 14:55:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:28,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:28,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:55:28,423 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)] === [2024-06-04 14:55:28,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash 602537145, now seen corresponding path program 6 times [2024-06-04 14:55:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:28,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822687311] [2024-06-04 14:55:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822687311] [2024-06-04 14:55:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822687311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143806845] [2024-06-04 14:55:29,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:29,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:29,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:29,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:29,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 443 transitions, 4534 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:29,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:29,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:29,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:30,540 INFO L124 PetriNetUnfolderBase]: 3279/5276 cut-off events. [2024-06-04 14:55:30,540 INFO L125 PetriNetUnfolderBase]: For 999021/999031 co-relation queries the response was YES. [2024-06-04 14:55:30,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48342 conditions, 5276 events. 3279/5276 cut-off events. For 999021/999031 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32414 event pairs, 605 based on Foata normal form. 2/5266 useless extension candidates. Maximal degree in co-relation 48173. Up to 4932 conditions per place. [2024-06-04 14:55:30,756 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 47 changer transitions 0/467 dead transitions. [2024-06-04 14:55:30,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 467 transitions, 6102 flow [2024-06-04 14:55:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:55:30,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:55:30,757 INFO L175 Difference]: Start difference. First operand has 362 places, 443 transitions, 4534 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:55:30,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 467 transitions, 6102 flow [2024-06-04 14:55:33,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 467 transitions, 5903 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:33,966 INFO L231 Difference]: Finished difference. Result has 364 places, 449 transitions, 4626 flow [2024-06-04 14:55:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4626, PETRI_PLACES=364, PETRI_TRANSITIONS=449} [2024-06-04 14:55:33,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 14:55:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 449 transitions, 4626 flow [2024-06-04 14:55:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:33,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:55:33,968 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)] === [2024-06-04 14:55:33,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -942174579, now seen corresponding path program 7 times [2024-06-04 14:55:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864623837] [2024-06-04 14:55:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:34,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864623837] [2024-06-04 14:55:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864623837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:34,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961874797] [2024-06-04 14:55:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:35,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:35,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 449 transitions, 4626 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:35,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:35,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:35,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:36,281 INFO L124 PetriNetUnfolderBase]: 3292/5298 cut-off events. [2024-06-04 14:55:36,281 INFO L125 PetriNetUnfolderBase]: For 1022493/1022503 co-relation queries the response was YES. [2024-06-04 14:55:36,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49196 conditions, 5298 events. 3292/5298 cut-off events. For 1022493/1022503 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32572 event pairs, 604 based on Foata normal form. 2/5288 useless extension candidates. Maximal degree in co-relation 49025. Up to 4941 conditions per place. [2024-06-04 14:55:36,362 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 399 selfloop transitions, 48 changer transitions 0/474 dead transitions. [2024-06-04 14:55:36,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 474 transitions, 6000 flow [2024-06-04 14:55:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 14:55:36,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-04 14:55:36,363 INFO L175 Difference]: Start difference. First operand has 364 places, 449 transitions, 4626 flow. Second operand 10 states and 171 transitions. [2024-06-04 14:55:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 474 transitions, 6000 flow [2024-06-04 14:55:38,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 474 transitions, 5800 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:38,954 INFO L231 Difference]: Finished difference. Result has 368 places, 455 transitions, 4726 flow [2024-06-04 14:55:38,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4726, PETRI_PLACES=368, PETRI_TRANSITIONS=455} [2024-06-04 14:55:38,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-04 14:55:38,954 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 455 transitions, 4726 flow [2024-06-04 14:55:38,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:38,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:38,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:38,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:55:38,954 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)] === [2024-06-04 14:55:38,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:38,955 INFO L85 PathProgramCache]: Analyzing trace with hash -714095799, now seen corresponding path program 8 times [2024-06-04 14:55:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277212020] [2024-06-04 14:55:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:39,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277212020] [2024-06-04 14:55:39,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277212020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:39,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:39,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:39,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685938161] [2024-06-04 14:55:39,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:39,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:39,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:39,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:39,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 455 transitions, 4726 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:39,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:39,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:41,164 INFO L124 PetriNetUnfolderBase]: 3301/5313 cut-off events. [2024-06-04 14:55:41,164 INFO L125 PetriNetUnfolderBase]: For 1042011/1042021 co-relation queries the response was YES. [2024-06-04 14:55:41,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49602 conditions, 5313 events. 3301/5313 cut-off events. For 1042011/1042021 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32703 event pairs, 605 based on Foata normal form. 3/5304 useless extension candidates. Maximal degree in co-relation 49430. Up to 4990 conditions per place. [2024-06-04 14:55:41,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 416 selfloop transitions, 35 changer transitions 0/478 dead transitions. [2024-06-04 14:55:41,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 478 transitions, 6356 flow [2024-06-04 14:55:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:55:41,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:55:41,253 INFO L175 Difference]: Start difference. First operand has 368 places, 455 transitions, 4726 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:55:41,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 478 transitions, 6356 flow [2024-06-04 14:55:44,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 478 transitions, 6159 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:44,509 INFO L231 Difference]: Finished difference. Result has 371 places, 461 transitions, 4821 flow [2024-06-04 14:55:44,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4821, PETRI_PLACES=371, PETRI_TRANSITIONS=461} [2024-06-04 14:55:44,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 14:55:44,509 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 461 transitions, 4821 flow [2024-06-04 14:55:44,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:44,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:44,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:44,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:55:44,510 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)] === [2024-06-04 14:55:44,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash -602094515, now seen corresponding path program 1 times [2024-06-04 14:55:44,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:44,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437650204] [2024-06-04 14:55:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437650204] [2024-06-04 14:55:45,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437650204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:45,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:45,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757181174] [2024-06-04 14:55:45,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:45,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:45,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:55:45,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 461 transitions, 4821 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) [2024-06-04 14:55:45,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:45,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:55:45,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:46,789 INFO L124 PetriNetUnfolderBase]: 3495/5520 cut-off events. [2024-06-04 14:55:46,789 INFO L125 PetriNetUnfolderBase]: For 1217147/1217147 co-relation queries the response was YES. [2024-06-04 14:55:46,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53973 conditions, 5520 events. 3495/5520 cut-off events. For 1217147/1217147 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33025 event pairs, 675 based on Foata normal form. 1/5521 useless extension candidates. Maximal degree in co-relation 53799. Up to 5349 conditions per place. [2024-06-04 14:55:46,877 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 450 selfloop transitions, 22 changer transitions 0/476 dead transitions. [2024-06-04 14:55:46,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 476 transitions, 5837 flow [2024-06-04 14:55:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:55:46,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:55:46,877 INFO L175 Difference]: Start difference. First operand has 371 places, 461 transitions, 4821 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:55:46,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 476 transitions, 5837 flow [2024-06-04 14:55:52,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 476 transitions, 5570 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:52,362 INFO L231 Difference]: Finished difference. Result has 372 places, 464 transitions, 4656 flow [2024-06-04 14:55:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4560, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4656, PETRI_PLACES=372, PETRI_TRANSITIONS=464} [2024-06-04 14:55:52,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-04 14:55:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 464 transitions, 4656 flow [2024-06-04 14:55:52,362 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) [2024-06-04 14:55:52,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:52,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:55:52,362 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)] === [2024-06-04 14:55:52,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash -838751243, now seen corresponding path program 4 times [2024-06-04 14:55:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:52,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914843294] [2024-06-04 14:55:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:53,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914843294] [2024-06-04 14:55:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914843294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:53,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002821400] [2024-06-04 14:55:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:53,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:53,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 464 transitions, 4656 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:53,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:53,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:53,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:54,694 INFO L124 PetriNetUnfolderBase]: 3324/5342 cut-off events. [2024-06-04 14:55:54,694 INFO L125 PetriNetUnfolderBase]: For 1049302/1049312 co-relation queries the response was YES. [2024-06-04 14:55:54,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49677 conditions, 5342 events. 3324/5342 cut-off events. For 1049302/1049312 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32780 event pairs, 612 based on Foata normal form. 2/5332 useless extension candidates. Maximal degree in co-relation 49502. Up to 5051 conditions per place. [2024-06-04 14:55:54,773 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 19 changer transitions 0/479 dead transitions. [2024-06-04 14:55:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 479 transitions, 5674 flow [2024-06-04 14:55:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 14:55:54,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:55:54,774 INFO L175 Difference]: Start difference. First operand has 372 places, 464 transitions, 4656 flow. Second operand 9 states and 147 transitions. [2024-06-04 14:55:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 479 transitions, 5674 flow [2024-06-04 14:55:58,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 479 transitions, 5618 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:58,511 INFO L231 Difference]: Finished difference. Result has 374 places, 466 transitions, 4731 flow [2024-06-04 14:55:58,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4731, PETRI_PLACES=374, PETRI_TRANSITIONS=466} [2024-06-04 14:55:58,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-04 14:55:58,512 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 466 transitions, 4731 flow [2024-06-04 14:55:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:55:58,512 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)] === [2024-06-04 14:55:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -838573489, now seen corresponding path program 9 times [2024-06-04 14:55:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380488386] [2024-06-04 14:55:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380488386] [2024-06-04 14:55:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380488386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:59,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:59,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510349072] [2024-06-04 14:55:59,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:59,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:59,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:55:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 466 transitions, 4731 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:55:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:55:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:00,783 INFO L124 PetriNetUnfolderBase]: 3305/5316 cut-off events. [2024-06-04 14:56:00,783 INFO L125 PetriNetUnfolderBase]: For 1048452/1048462 co-relation queries the response was YES. [2024-06-04 14:56:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49296 conditions, 5316 events. 3305/5316 cut-off events. For 1048452/1048462 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32656 event pairs, 601 based on Foata normal form. 3/5307 useless extension candidates. Maximal degree in co-relation 49120. Up to 4971 conditions per place. [2024-06-04 14:56:00,864 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-04 14:56:00,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 482 transitions, 5685 flow [2024-06-04 14:56:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:56:00,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:56:00,865 INFO L175 Difference]: Start difference. First operand has 374 places, 466 transitions, 4731 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:56:00,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 482 transitions, 5685 flow [2024-06-04 14:56:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 482 transitions, 5520 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:04,528 INFO L231 Difference]: Finished difference. Result has 376 places, 466 transitions, 4650 flow [2024-06-04 14:56:04,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4566, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4650, PETRI_PLACES=376, PETRI_TRANSITIONS=466} [2024-06-04 14:56:04,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-04 14:56:04,529 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 466 transitions, 4650 flow [2024-06-04 14:56:04,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 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) [2024-06-04 14:56:04,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:04,529 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] [2024-06-04 14:56:04,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:56:04,529 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)] === [2024-06-04 14:56:04,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:04,530 INFO L85 PathProgramCache]: Analyzing trace with hash -559542807, now seen corresponding path program 1 times [2024-06-04 14:56:04,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:04,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586615905] [2024-06-04 14:56:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:04,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:05,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:05,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586615905] [2024-06-04 14:56:05,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586615905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:05,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:05,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587077214] [2024-06-04 14:56:05,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:05,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:05,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:05,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 466 transitions, 4650 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) [2024-06-04 14:56:05,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:05,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:05,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:07,021 INFO L124 PetriNetUnfolderBase]: 3489/5513 cut-off events. [2024-06-04 14:56:07,021 INFO L125 PetriNetUnfolderBase]: For 1236606/1236606 co-relation queries the response was YES. [2024-06-04 14:56:07,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53204 conditions, 5513 events. 3489/5513 cut-off events. For 1236606/1236606 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32716 event pairs, 543 based on Foata normal form. 2/5515 useless extension candidates. Maximal degree in co-relation 53027. Up to 5199 conditions per place. [2024-06-04 14:56:07,108 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 52 changer transitions 0/501 dead transitions. [2024-06-04 14:56:07,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 501 transitions, 6026 flow [2024-06-04 14:56:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:56:07,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:56:07,110 INFO L175 Difference]: Start difference. First operand has 376 places, 466 transitions, 4650 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:56:07,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 501 transitions, 6026 flow [2024-06-04 14:56:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 501 transitions, 5942 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:13,213 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 4735 flow [2024-06-04 14:56:13,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4566, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4735, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-04 14:56:13,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 14:56:13,213 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 4735 flow [2024-06-04 14:56:13,213 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) [2024-06-04 14:56:13,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:13,213 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] [2024-06-04 14:56:13,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:56:13,214 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)] === [2024-06-04 14:56:13,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1178489533, now seen corresponding path program 2 times [2024-06-04 14:56:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209508125] [2024-06-04 14:56:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209508125] [2024-06-04 14:56:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209508125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:14,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:14,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077554783] [2024-06-04 14:56:14,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:14,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:14,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:14,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 4735 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) [2024-06-04 14:56:14,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:14,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:14,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:15,818 INFO L124 PetriNetUnfolderBase]: 3515/5551 cut-off events. [2024-06-04 14:56:15,819 INFO L125 PetriNetUnfolderBase]: For 1271827/1271827 co-relation queries the response was YES. [2024-06-04 14:56:15,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54001 conditions, 5551 events. 3515/5551 cut-off events. For 1271827/1271827 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33208 event pairs, 673 based on Foata normal form. 2/5553 useless extension candidates. Maximal degree in co-relation 53823. Up to 5302 conditions per place. [2024-06-04 14:56:15,894 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 51 changer transitions 0/504 dead transitions. [2024-06-04 14:56:15,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 504 transitions, 6146 flow [2024-06-04 14:56:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:56:15,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:56:15,896 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 4735 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:56:15,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 504 transitions, 6146 flow [2024-06-04 14:56:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 504 transitions, 6045 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:21,215 INFO L231 Difference]: Finished difference. Result has 383 places, 477 transitions, 4838 flow [2024-06-04 14:56:21,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4838, PETRI_PLACES=383, PETRI_TRANSITIONS=477} [2024-06-04 14:56:21,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 14:56:21,216 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 477 transitions, 4838 flow [2024-06-04 14:56:21,216 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) [2024-06-04 14:56:21,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:21,216 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] [2024-06-04 14:56:21,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:56:21,216 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)] === [2024-06-04 14:56:21,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -552124197, now seen corresponding path program 3 times [2024-06-04 14:56:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93455724] [2024-06-04 14:56:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:21,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93455724] [2024-06-04 14:56:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93455724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:22,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531372470] [2024-06-04 14:56:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:22,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:22,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 477 transitions, 4838 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) [2024-06-04 14:56:22,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:22,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:22,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:23,902 INFO L124 PetriNetUnfolderBase]: 3510/5546 cut-off events. [2024-06-04 14:56:23,902 INFO L125 PetriNetUnfolderBase]: For 1274266/1274266 co-relation queries the response was YES. [2024-06-04 14:56:23,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53865 conditions, 5546 events. 3510/5546 cut-off events. For 1274266/1274266 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33241 event pairs, 676 based on Foata normal form. 2/5548 useless extension candidates. Maximal degree in co-relation 53685. Up to 5312 conditions per place. [2024-06-04 14:56:23,985 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 450 selfloop transitions, 48 changer transitions 0/502 dead transitions. [2024-06-04 14:56:23,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 502 transitions, 5896 flow [2024-06-04 14:56:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:56:23,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:56:23,987 INFO L175 Difference]: Start difference. First operand has 383 places, 477 transitions, 4838 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:56:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 502 transitions, 5896 flow [2024-06-04 14:56:31,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 502 transitions, 5816 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:31,049 INFO L231 Difference]: Finished difference. Result has 388 places, 477 transitions, 4859 flow [2024-06-04 14:56:31,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4859, PETRI_PLACES=388, PETRI_TRANSITIONS=477} [2024-06-04 14:56:31,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-04 14:56:31,050 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 477 transitions, 4859 flow [2024-06-04 14:56:31,050 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) [2024-06-04 14:56:31,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:31,050 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] [2024-06-04 14:56:31,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:56:31,050 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)] === [2024-06-04 14:56:31,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash -471004947, now seen corresponding path program 1 times [2024-06-04 14:56:31,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:31,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641791202] [2024-06-04 14:56:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:32,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:32,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641791202] [2024-06-04 14:56:32,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641791202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:32,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:32,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:32,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665762340] [2024-06-04 14:56:32,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:32,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:32,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 477 transitions, 4859 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) [2024-06-04 14:56:32,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:32,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:32,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:33,640 INFO L124 PetriNetUnfolderBase]: 3515/5557 cut-off events. [2024-06-04 14:56:33,640 INFO L125 PetriNetUnfolderBase]: For 1285357/1285357 co-relation queries the response was YES. [2024-06-04 14:56:33,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54183 conditions, 5557 events. 3515/5557 cut-off events. For 1285357/1285357 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33320 event pairs, 673 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 54001. Up to 5350 conditions per place. [2024-06-04 14:56:33,729 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 20 changer transitions 0/510 dead transitions. [2024-06-04 14:56:33,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 510 transitions, 6055 flow [2024-06-04 14:56:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:56:33,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:56:33,730 INFO L175 Difference]: Start difference. First operand has 388 places, 477 transitions, 4859 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:56:33,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 510 transitions, 6055 flow [2024-06-04 14:56:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 510 transitions, 5952 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:39,517 INFO L231 Difference]: Finished difference. Result has 389 places, 480 transitions, 4916 flow [2024-06-04 14:56:39,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4756, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=389, PETRI_TRANSITIONS=480} [2024-06-04 14:56:39,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 14:56:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 480 transitions, 4916 flow [2024-06-04 14:56:39,517 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) [2024-06-04 14:56:39,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:39,517 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] [2024-06-04 14:56:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:56:39,517 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)] === [2024-06-04 14:56:39,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -470884977, now seen corresponding path program 2 times [2024-06-04 14:56:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507824367] [2024-06-04 14:56:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:40,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:40,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507824367] [2024-06-04 14:56:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507824367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:40,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529387039] [2024-06-04 14:56:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:40,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:40,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:40,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 480 transitions, 4916 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) [2024-06-04 14:56:40,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:40,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:41,994 INFO L124 PetriNetUnfolderBase]: 3520/5558 cut-off events. [2024-06-04 14:56:41,994 INFO L125 PetriNetUnfolderBase]: For 1307984/1307984 co-relation queries the response was YES. [2024-06-04 14:56:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54758 conditions, 5558 events. 3520/5558 cut-off events. For 1307984/1307984 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 33263 event pairs, 672 based on Foata normal form. 1/5559 useless extension candidates. Maximal degree in co-relation 54575. Up to 5316 conditions per place. [2024-06-04 14:56:42,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 49 changer transitions 0/514 dead transitions. [2024-06-04 14:56:42,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 514 transitions, 6492 flow [2024-06-04 14:56:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:56:42,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 14:56:42,084 INFO L175 Difference]: Start difference. First operand has 389 places, 480 transitions, 4916 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:56:42,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 514 transitions, 6492 flow [2024-06-04 14:56:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 514 transitions, 6354 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:47,446 INFO L231 Difference]: Finished difference. Result has 391 places, 486 transitions, 5116 flow [2024-06-04 14:56:47,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5116, PETRI_PLACES=391, PETRI_TRANSITIONS=486} [2024-06-04 14:56:47,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-04 14:56:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 486 transitions, 5116 flow [2024-06-04 14:56:47,447 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) [2024-06-04 14:56:47,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:47,447 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] [2024-06-04 14:56:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:56:47,447 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)] === [2024-06-04 14:56:47,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1330353967, now seen corresponding path program 1 times [2024-06-04 14:56:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:47,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91260726] [2024-06-04 14:56:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:47,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91260726] [2024-06-04 14:56:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91260726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:48,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:48,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661314741] [2024-06-04 14:56:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:48,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:48,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:48,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:48,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:48,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 486 transitions, 5116 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) [2024-06-04 14:56:48,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:48,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:49,930 INFO L124 PetriNetUnfolderBase]: 3525/5569 cut-off events. [2024-06-04 14:56:49,930 INFO L125 PetriNetUnfolderBase]: For 1333782/1333782 co-relation queries the response was YES. [2024-06-04 14:56:49,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55304 conditions, 5569 events. 3525/5569 cut-off events. For 1333782/1333782 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33388 event pairs, 672 based on Foata normal form. 1/5570 useless extension candidates. Maximal degree in co-relation 55120. Up to 5299 conditions per place. [2024-06-04 14:56:50,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 62 changer transitions 0/520 dead transitions. [2024-06-04 14:56:50,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 520 transitions, 6622 flow [2024-06-04 14:56:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:56:50,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:56:50,024 INFO L175 Difference]: Start difference. First operand has 391 places, 486 transitions, 5116 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:56:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 520 transitions, 6622 flow [2024-06-04 14:56:56,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 520 transitions, 6434 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:56,720 INFO L231 Difference]: Finished difference. Result has 395 places, 492 transitions, 5208 flow [2024-06-04 14:56:56,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5208, PETRI_PLACES=395, PETRI_TRANSITIONS=492} [2024-06-04 14:56:56,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-04 14:56:56,721 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 492 transitions, 5208 flow [2024-06-04 14:56:56,721 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) [2024-06-04 14:56:56,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:56,721 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] [2024-06-04 14:56:56,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:56:56,722 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)] === [2024-06-04 14:56:56,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash -293516121, now seen corresponding path program 2 times [2024-06-04 14:56:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:56,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365953029] [2024-06-04 14:56:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365953029] [2024-06-04 14:56:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365953029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:57,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:57,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652221569] [2024-06-04 14:56:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:57,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:56:57,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 492 transitions, 5208 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) [2024-06-04 14:56:57,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:57,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:56:57,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:59,083 INFO L124 PetriNetUnfolderBase]: 3530/5578 cut-off events. [2024-06-04 14:56:59,084 INFO L125 PetriNetUnfolderBase]: For 1356722/1356722 co-relation queries the response was YES. [2024-06-04 14:56:59,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55892 conditions, 5578 events. 3530/5578 cut-off events. For 1356722/1356722 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33474 event pairs, 676 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 55706. Up to 5343 conditions per place. [2024-06-04 14:56:59,173 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 49 changer transitions 0/519 dead transitions. [2024-06-04 14:56:59,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 519 transitions, 6376 flow [2024-06-04 14:56:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:56:59,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:56:59,174 INFO L175 Difference]: Start difference. First operand has 395 places, 492 transitions, 5208 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:56:59,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 519 transitions, 6376 flow [2024-06-04 14:57:05,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 519 transitions, 6172 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:05,935 INFO L231 Difference]: Finished difference. Result has 399 places, 495 transitions, 5192 flow [2024-06-04 14:57:05,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5192, PETRI_PLACES=399, PETRI_TRANSITIONS=495} [2024-06-04 14:57:05,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 14:57:05,936 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 495 transitions, 5192 flow [2024-06-04 14:57:05,936 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) [2024-06-04 14:57:05,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:05,936 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] [2024-06-04 14:57:05,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:57:05,937 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)] === [2024-06-04 14:57:05,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1436869573, now seen corresponding path program 3 times [2024-06-04 14:57:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:05,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459713474] [2024-06-04 14:57:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:05,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:06,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459713474] [2024-06-04 14:57:06,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459713474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:06,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:06,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818671532] [2024-06-04 14:57:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:06,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:06,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 495 transitions, 5192 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) [2024-06-04 14:57:06,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:06,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:06,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:08,335 INFO L124 PetriNetUnfolderBase]: 3535/5583 cut-off events. [2024-06-04 14:57:08,336 INFO L125 PetriNetUnfolderBase]: For 1375234/1375234 co-relation queries the response was YES. [2024-06-04 14:57:08,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56065 conditions, 5583 events. 3535/5583 cut-off events. For 1375234/1375234 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33485 event pairs, 673 based on Foata normal form. 1/5584 useless extension candidates. Maximal degree in co-relation 55877. Up to 5375 conditions per place. [2024-06-04 14:57:08,423 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 33 changer transitions 0/522 dead transitions. [2024-06-04 14:57:08,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 522 transitions, 6368 flow [2024-06-04 14:57:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 14:57:08,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 14:57:08,424 INFO L175 Difference]: Start difference. First operand has 399 places, 495 transitions, 5192 flow. Second operand 9 states and 154 transitions. [2024-06-04 14:57:08,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 522 transitions, 6368 flow [2024-06-04 14:57:14,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 522 transitions, 6248 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:14,337 INFO L231 Difference]: Finished difference. Result has 401 places, 498 transitions, 5230 flow [2024-06-04 14:57:14,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5230, PETRI_PLACES=401, PETRI_TRANSITIONS=498} [2024-06-04 14:57:14,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-04 14:57:14,338 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 498 transitions, 5230 flow [2024-06-04 14:57:14,338 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) [2024-06-04 14:57:14,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:14,338 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] [2024-06-04 14:57:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:57:14,338 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)] === [2024-06-04 14:57:14,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash -605512807, now seen corresponding path program 3 times [2024-06-04 14:57:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:14,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950640458] [2024-06-04 14:57:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:15,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950640458] [2024-06-04 14:57:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950640458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:15,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:15,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006571455] [2024-06-04 14:57:15,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:15,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:15,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:15,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 498 transitions, 5230 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) [2024-06-04 14:57:15,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:15,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:16,713 INFO L124 PetriNetUnfolderBase]: 3540/5588 cut-off events. [2024-06-04 14:57:16,713 INFO L125 PetriNetUnfolderBase]: For 1394658/1394658 co-relation queries the response was YES. [2024-06-04 14:57:16,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56222 conditions, 5588 events. 3540/5588 cut-off events. For 1394658/1394658 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33461 event pairs, 672 based on Foata normal form. 1/5589 useless extension candidates. Maximal degree in co-relation 56033. Up to 5351 conditions per place. [2024-06-04 14:57:16,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 54 changer transitions 0/525 dead transitions. [2024-06-04 14:57:16,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 525 transitions, 6376 flow [2024-06-04 14:57:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:57:16,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:57:16,802 INFO L175 Difference]: Start difference. First operand has 401 places, 498 transitions, 5230 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:57:16,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 525 transitions, 6376 flow [2024-06-04 14:57:23,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 525 transitions, 6246 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:23,671 INFO L231 Difference]: Finished difference. Result has 403 places, 501 transitions, 5264 flow [2024-06-04 14:57:23,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5100, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5264, PETRI_PLACES=403, PETRI_TRANSITIONS=501} [2024-06-04 14:57:23,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 14:57:23,671 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 501 transitions, 5264 flow [2024-06-04 14:57:23,671 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) [2024-06-04 14:57:23,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:23,671 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] [2024-06-04 14:57:23,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 14:57:23,672 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)] === [2024-06-04 14:57:23,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash -300516703, now seen corresponding path program 4 times [2024-06-04 14:57:23,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:23,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658077783] [2024-06-04 14:57:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:23,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:24,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658077783] [2024-06-04 14:57:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658077783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:24,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232532751] [2024-06-04 14:57:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:24,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:24,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 501 transitions, 5264 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) [2024-06-04 14:57:24,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:24,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:24,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:26,258 INFO L124 PetriNetUnfolderBase]: 3553/5609 cut-off events. [2024-06-04 14:57:26,258 INFO L125 PetriNetUnfolderBase]: For 1422919/1422919 co-relation queries the response was YES. [2024-06-04 14:57:26,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56487 conditions, 5609 events. 3553/5609 cut-off events. For 1422919/1422919 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33627 event pairs, 676 based on Foata normal form. 2/5611 useless extension candidates. Maximal degree in co-relation 56297. Up to 5372 conditions per place. [2024-06-04 14:57:26,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 48 changer transitions 0/525 dead transitions. [2024-06-04 14:57:26,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 525 transitions, 6415 flow [2024-06-04 14:57:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:57:26,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:57:26,349 INFO L175 Difference]: Start difference. First operand has 403 places, 501 transitions, 5264 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:57:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 525 transitions, 6415 flow [2024-06-04 14:57:33,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 525 transitions, 6273 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:33,695 INFO L231 Difference]: Finished difference. Result has 405 places, 506 transitions, 5290 flow [2024-06-04 14:57:33,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5290, PETRI_PLACES=405, PETRI_TRANSITIONS=506} [2024-06-04 14:57:33,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-04 14:57:33,696 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 506 transitions, 5290 flow [2024-06-04 14:57:33,696 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) [2024-06-04 14:57:33,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:33,696 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] [2024-06-04 14:57:33,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 14:57:33,696 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)] === [2024-06-04 14:57:33,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:33,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1740350141, now seen corresponding path program 5 times [2024-06-04 14:57:33,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:33,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895531545] [2024-06-04 14:57:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:34,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:34,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895531545] [2024-06-04 14:57:34,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895531545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:34,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:34,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:34,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314678519] [2024-06-04 14:57:34,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:34,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:34,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:34,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:34,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:34,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 506 transitions, 5290 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) [2024-06-04 14:57:34,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:34,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:34,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:36,276 INFO L124 PetriNetUnfolderBase]: 3574/5640 cut-off events. [2024-06-04 14:57:36,276 INFO L125 PetriNetUnfolderBase]: For 1461192/1461192 co-relation queries the response was YES. [2024-06-04 14:57:36,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57067 conditions, 5640 events. 3574/5640 cut-off events. For 1461192/1461192 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33825 event pairs, 675 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 56876. Up to 5380 conditions per place. [2024-06-04 14:57:36,368 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 474 selfloop transitions, 53 changer transitions 0/531 dead transitions. [2024-06-04 14:57:36,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 531 transitions, 6724 flow [2024-06-04 14:57:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:57:36,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:57:36,369 INFO L175 Difference]: Start difference. First operand has 405 places, 506 transitions, 5290 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:57:36,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 531 transitions, 6724 flow [2024-06-04 14:57:44,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 531 transitions, 6625 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:44,593 INFO L231 Difference]: Finished difference. Result has 409 places, 510 transitions, 5366 flow [2024-06-04 14:57:44,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5366, PETRI_PLACES=409, PETRI_TRANSITIONS=510} [2024-06-04 14:57:44,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-04 14:57:44,593 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 510 transitions, 5366 flow [2024-06-04 14:57:44,593 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) [2024-06-04 14:57:44,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:44,594 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] [2024-06-04 14:57:44,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 14:57:44,594 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)] === [2024-06-04 14:57:44,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1751401331, now seen corresponding path program 6 times [2024-06-04 14:57:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:44,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345557029] [2024-06-04 14:57:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345557029] [2024-06-04 14:57:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345557029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484755220] [2024-06-04 14:57:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:45,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:45,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 510 transitions, 5366 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) [2024-06-04 14:57:45,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:45,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:45,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:47,200 INFO L124 PetriNetUnfolderBase]: 3569/5631 cut-off events. [2024-06-04 14:57:47,200 INFO L125 PetriNetUnfolderBase]: For 1462994/1462994 co-relation queries the response was YES. [2024-06-04 14:57:47,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56917 conditions, 5631 events. 3569/5631 cut-off events. For 1462994/1462994 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33754 event pairs, 674 based on Foata normal form. 2/5633 useless extension candidates. Maximal degree in co-relation 56725. Up to 5396 conditions per place. [2024-06-04 14:57:47,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 476 selfloop transitions, 49 changer transitions 0/529 dead transitions. [2024-06-04 14:57:47,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 529 transitions, 6462 flow [2024-06-04 14:57:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:57:47,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:57:47,296 INFO L175 Difference]: Start difference. First operand has 409 places, 510 transitions, 5366 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:57:47,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 529 transitions, 6462 flow [2024-06-04 14:57:53,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 529 transitions, 6371 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:53,722 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 5378 flow [2024-06-04 14:57:53,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5275, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5378, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-04 14:57:53,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 14:57:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 5378 flow [2024-06-04 14:57:53,723 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) [2024-06-04 14:57:53,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:53,723 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] [2024-06-04 14:57:53,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 14:57:53,723 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)] === [2024-06-04 14:57:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1186375056, now seen corresponding path program 1 times [2024-06-04 14:57:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:53,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109407013] [2024-06-04 14:57:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:54,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109407013] [2024-06-04 14:57:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109407013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:54,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:54,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255282443] [2024-06-04 14:57:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:54,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:54,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:57:54,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 5378 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) [2024-06-04 14:57:54,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:54,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:57:54,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:56,438 INFO L124 PetriNetUnfolderBase]: 3579/5645 cut-off events. [2024-06-04 14:57:56,438 INFO L125 PetriNetUnfolderBase]: For 1484005/1484005 co-relation queries the response was YES. [2024-06-04 14:57:56,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57313 conditions, 5645 events. 3579/5645 cut-off events. For 1484005/1484005 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33850 event pairs, 671 based on Foata normal form. 2/5647 useless extension candidates. Maximal degree in co-relation 57119. Up to 5384 conditions per place. [2024-06-04 14:57:56,518 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 502 selfloop transitions, 37 changer transitions 0/543 dead transitions. [2024-06-04 14:57:56,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 543 transitions, 6666 flow [2024-06-04 14:57:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 14:57:56,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 14:57:56,519 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 5378 flow. Second operand 10 states and 172 transitions. [2024-06-04 14:57:56,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 543 transitions, 6666 flow [2024-06-04 14:58:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 543 transitions, 6538 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:58:05,055 INFO L231 Difference]: Finished difference. Result has 414 places, 514 transitions, 5470 flow [2024-06-04 14:58:05,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5250, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5470, PETRI_PLACES=414, PETRI_TRANSITIONS=514} [2024-06-04 14:58:05,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-04 14:58:05,055 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 514 transitions, 5470 flow [2024-06-04 14:58:05,055 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) [2024-06-04 14:58:05,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:05,056 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] [2024-06-04 14:58:05,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 14:58:05,056 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)] === [2024-06-04 14:58:05,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash 544338339, now seen corresponding path program 1 times [2024-06-04 14:58:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209936193] [2024-06-04 14:58:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:05,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:05,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209936193] [2024-06-04 14:58:05,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209936193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:05,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:05,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883987150] [2024-06-04 14:58:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:05,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:58:05,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 514 transitions, 5470 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) [2024-06-04 14:58:05,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:05,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:58:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:07,522 INFO L124 PetriNetUnfolderBase]: 3589/5659 cut-off events. [2024-06-04 14:58:07,522 INFO L125 PetriNetUnfolderBase]: For 1511823/1511823 co-relation queries the response was YES. [2024-06-04 14:58:07,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58306 conditions, 5659 events. 3589/5659 cut-off events. For 1511823/1511823 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33923 event pairs, 670 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 58111. Up to 5429 conditions per place. [2024-06-04 14:58:07,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 512 selfloop transitions, 27 changer transitions 0/543 dead transitions. [2024-06-04 14:58:07,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 543 transitions, 6730 flow [2024-06-04 14:58:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 14:58:07,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 14:58:07,614 INFO L175 Difference]: Start difference. First operand has 414 places, 514 transitions, 5470 flow. Second operand 9 states and 155 transitions. [2024-06-04 14:58:07,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 543 transitions, 6730 flow [2024-06-04 14:58:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 543 transitions, 6544 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:16,230 INFO L231 Difference]: Finished difference. Result has 415 places, 517 transitions, 5444 flow [2024-06-04 14:58:16,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5284, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5444, PETRI_PLACES=415, PETRI_TRANSITIONS=517} [2024-06-04 14:58:16,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 14:58:16,230 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 517 transitions, 5444 flow [2024-06-04 14:58:16,230 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) [2024-06-04 14:58:16,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:16,230 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] [2024-06-04 14:58:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 14:58:16,230 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)] === [2024-06-04 14:58:16,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1182565621, now seen corresponding path program 2 times [2024-06-04 14:58:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:16,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656635296] [2024-06-04 14:58:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656635296] [2024-06-04 14:58:17,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656635296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:17,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:17,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:17,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205407502] [2024-06-04 14:58:17,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:17,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:58:17,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 517 transitions, 5444 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) [2024-06-04 14:58:17,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:17,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:58:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:18,588 INFO L124 PetriNetUnfolderBase]: 3631/5721 cut-off events. [2024-06-04 14:58:18,588 INFO L125 PetriNetUnfolderBase]: For 1577319/1577319 co-relation queries the response was YES. [2024-06-04 14:58:18,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59929 conditions, 5721 events. 3631/5721 cut-off events. For 1577319/1577319 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34361 event pairs, 675 based on Foata normal form. 2/5723 useless extension candidates. Maximal degree in co-relation 59733. Up to 5326 conditions per place. [2024-06-04 14:58:18,677 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 73 changer transitions 0/553 dead transitions. [2024-06-04 14:58:18,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 553 transitions, 7510 flow [2024-06-04 14:58:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:58:18,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:58:18,678 INFO L175 Difference]: Start difference. First operand has 415 places, 517 transitions, 5444 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:58:18,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 553 transitions, 7510 flow [2024-06-04 14:58:28,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 553 transitions, 7376 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:28,332 INFO L231 Difference]: Finished difference. Result has 417 places, 526 transitions, 5768 flow [2024-06-04 14:58:28,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5768, PETRI_PLACES=417, PETRI_TRANSITIONS=526} [2024-06-04 14:58:28,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 14:58:28,332 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 526 transitions, 5768 flow [2024-06-04 14:58:28,332 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) [2024-06-04 14:58:28,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:28,332 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] [2024-06-04 14:58:28,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 14:58:28,332 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)] === [2024-06-04 14:58:28,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1182565776, now seen corresponding path program 2 times [2024-06-04 14:58:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457542078] [2024-06-04 14:58:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457542078] [2024-06-04 14:58:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457542078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:29,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:29,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:29,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425185927] [2024-06-04 14:58:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:29,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:58:29,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 526 transitions, 5768 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) [2024-06-04 14:58:29,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:29,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:58:29,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:30,860 INFO L124 PetriNetUnfolderBase]: 3641/5737 cut-off events. [2024-06-04 14:58:30,860 INFO L125 PetriNetUnfolderBase]: For 1605839/1605839 co-relation queries the response was YES. [2024-06-04 14:58:30,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60720 conditions, 5737 events. 3641/5737 cut-off events. For 1605839/1605839 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 34451 event pairs, 672 based on Foata normal form. 2/5739 useless extension candidates. Maximal degree in co-relation 60523. Up to 5450 conditions per place. [2024-06-04 14:58:30,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 49 changer transitions 0/554 dead transitions. [2024-06-04 14:58:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 554 transitions, 7102 flow [2024-06-04 14:58:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:58:30,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:58:30,954 INFO L175 Difference]: Start difference. First operand has 417 places, 526 transitions, 5768 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:58:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 554 transitions, 7102 flow [2024-06-04 14:58:40,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 554 transitions, 6907 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:40,055 INFO L231 Difference]: Finished difference. Result has 422 places, 530 transitions, 5826 flow [2024-06-04 14:58:40,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5826, PETRI_PLACES=422, PETRI_TRANSITIONS=530} [2024-06-04 14:58:40,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-04 14:58:40,056 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 530 transitions, 5826 flow [2024-06-04 14:58:40,056 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) [2024-06-04 14:58:40,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:40,056 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] [2024-06-04 14:58:40,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 14:58:40,057 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)] === [2024-06-04 14:58:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash 548063206, now seen corresponding path program 1 times [2024-06-04 14:58:40,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914209070] [2024-06-04 14:58:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:40,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914209070] [2024-06-04 14:58:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914209070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516588786] [2024-06-04 14:58:40,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:40,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:58:40,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 530 transitions, 5826 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) [2024-06-04 14:58:40,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:40,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:58:40,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:42,417 INFO L124 PetriNetUnfolderBase]: 3693/5807 cut-off events. [2024-06-04 14:58:42,417 INFO L125 PetriNetUnfolderBase]: For 1696469/1696469 co-relation queries the response was YES. [2024-06-04 14:58:42,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62787 conditions, 5807 events. 3693/5807 cut-off events. For 1696469/1696469 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34865 event pairs, 673 based on Foata normal form. 4/5811 useless extension candidates. Maximal degree in co-relation 62588. Up to 5456 conditions per place. [2024-06-04 14:58:42,514 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 506 selfloop transitions, 60 changer transitions 0/570 dead transitions. [2024-06-04 14:58:42,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 570 transitions, 7606 flow [2024-06-04 14:58:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:58:42,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:58:42,515 INFO L175 Difference]: Start difference. First operand has 422 places, 530 transitions, 5826 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:58:42,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 570 transitions, 7606 flow [2024-06-04 14:58:52,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 570 transitions, 7381 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:52,656 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 6007 flow [2024-06-04 14:58:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6007, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-04 14:58:52,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-04 14:58:52,656 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 6007 flow [2024-06-04 14:58:52,656 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) [2024-06-04 14:58:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:52,657 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] [2024-06-04 14:58:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 14:58:52,657 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)] === [2024-06-04 14:58:52,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 390790383, now seen corresponding path program 3 times [2024-06-04 14:58:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662766041] [2024-06-04 14:58:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:53,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662766041] [2024-06-04 14:58:53,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662766041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:53,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:53,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:53,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783271892] [2024-06-04 14:58:53,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:53,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:58:53,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 6007 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) [2024-06-04 14:58:53,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:53,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:58:53,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:55,028 INFO L124 PetriNetUnfolderBase]: 3687/5805 cut-off events. [2024-06-04 14:58:55,029 INFO L125 PetriNetUnfolderBase]: For 1684023/1684023 co-relation queries the response was YES. [2024-06-04 14:58:55,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63204 conditions, 5805 events. 3687/5805 cut-off events. For 1684023/1684023 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34893 event pairs, 677 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 63003. Up to 5407 conditions per place. [2024-06-04 14:58:55,128 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 490 selfloop transitions, 74 changer transitions 0/568 dead transitions. [2024-06-04 14:58:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 568 transitions, 7545 flow [2024-06-04 14:58:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:58:55,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:58:55,129 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 6007 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:58:55,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 568 transitions, 7545 flow [2024-06-04 14:59:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 568 transitions, 7322 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:02,925 INFO L231 Difference]: Finished difference. Result has 430 places, 542 transitions, 5946 flow [2024-06-04 14:59:02,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5946, PETRI_PLACES=430, PETRI_TRANSITIONS=542} [2024-06-04 14:59:02,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 14:59:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 542 transitions, 5946 flow [2024-06-04 14:59:02,925 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) [2024-06-04 14:59:02,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:02,926 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] [2024-06-04 14:59:02,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 14:59:02,926 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)] === [2024-06-04 14:59:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -739320528, now seen corresponding path program 2 times [2024-06-04 14:59:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406696056] [2024-06-04 14:59:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:02,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:03,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406696056] [2024-06-04 14:59:03,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406696056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:03,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:03,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:03,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428306067] [2024-06-04 14:59:03,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:03,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:03,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:03,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:59:03,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 542 transitions, 5946 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) [2024-06-04 14:59:03,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:03,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:59:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:05,298 INFO L124 PetriNetUnfolderBase]: 3707/5831 cut-off events. [2024-06-04 14:59:05,298 INFO L125 PetriNetUnfolderBase]: For 1722205/1722205 co-relation queries the response was YES. [2024-06-04 14:59:05,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63106 conditions, 5831 events. 3707/5831 cut-off events. For 1722205/1722205 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35013 event pairs, 682 based on Foata normal form. 4/5835 useless extension candidates. Maximal degree in co-relation 62903. Up to 5606 conditions per place. [2024-06-04 14:59:05,393 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 526 selfloop transitions, 37 changer transitions 0/567 dead transitions. [2024-06-04 14:59:05,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 567 transitions, 7216 flow [2024-06-04 14:59:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:59:05,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:59:05,394 INFO L175 Difference]: Start difference. First operand has 430 places, 542 transitions, 5946 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:59:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 567 transitions, 7216 flow [2024-06-04 14:59:13,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 567 transitions, 7060 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:13,159 INFO L231 Difference]: Finished difference. Result has 431 places, 547 transitions, 5954 flow [2024-06-04 14:59:13,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5954, PETRI_PLACES=431, PETRI_TRANSITIONS=547} [2024-06-04 14:59:13,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-04 14:59:13,160 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 547 transitions, 5954 flow [2024-06-04 14:59:13,160 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) [2024-06-04 14:59:13,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:13,160 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] [2024-06-04 14:59:13,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 14:59:13,160 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)] === [2024-06-04 14:59:13,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 20901433, now seen corresponding path program 4 times [2024-06-04 14:59:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:13,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530451106] [2024-06-04 14:59:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:13,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:13,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530451106] [2024-06-04 14:59:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530451106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:13,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:13,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367576737] [2024-06-04 14:59:13,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:13,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:13,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:13,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:59:13,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 547 transitions, 5954 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) [2024-06-04 14:59:13,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:13,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:59:13,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:15,528 INFO L124 PetriNetUnfolderBase]: 3717/5845 cut-off events. [2024-06-04 14:59:15,528 INFO L125 PetriNetUnfolderBase]: For 1724957/1724957 co-relation queries the response was YES. [2024-06-04 14:59:15,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63321 conditions, 5845 events. 3717/5845 cut-off events. For 1724957/1724957 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35168 event pairs, 679 based on Foata normal form. 2/5847 useless extension candidates. Maximal degree in co-relation 63117. Up to 5635 conditions per place. [2024-06-04 14:59:15,625 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 534 selfloop transitions, 32 changer transitions 0/570 dead transitions. [2024-06-04 14:59:15,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 570 transitions, 7242 flow [2024-06-04 14:59:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:59:15,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:59:15,626 INFO L175 Difference]: Start difference. First operand has 431 places, 547 transitions, 5954 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:59:15,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 570 transitions, 7242 flow [2024-06-04 14:59:25,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 570 transitions, 7120 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:25,654 INFO L231 Difference]: Finished difference. Result has 434 places, 550 transitions, 5988 flow [2024-06-04 14:59:25,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5988, PETRI_PLACES=434, PETRI_TRANSITIONS=550} [2024-06-04 14:59:25,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 14:59:25,654 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 550 transitions, 5988 flow [2024-06-04 14:59:25,655 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) [2024-06-04 14:59:25,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:25,655 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] [2024-06-04 14:59:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 14:59:25,655 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)] === [2024-06-04 14:59:25,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1751404307, now seen corresponding path program 4 times [2024-06-04 14:59:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:25,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467631503] [2024-06-04 14:59:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:25,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467631503] [2024-06-04 14:59:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467631503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:26,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:26,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838470249] [2024-06-04 14:59:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:26,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:26,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:59:26,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 550 transitions, 5988 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) [2024-06-04 14:59:26,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:26,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:59:26,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:28,337 INFO L124 PetriNetUnfolderBase]: 3722/5852 cut-off events. [2024-06-04 14:59:28,337 INFO L125 PetriNetUnfolderBase]: For 1736380/1736380 co-relation queries the response was YES. [2024-06-04 14:59:28,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63438 conditions, 5852 events. 3722/5852 cut-off events. For 1736380/1736380 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35152 event pairs, 683 based on Foata normal form. 1/5853 useless extension candidates. Maximal degree in co-relation 63233. Up to 5612 conditions per place. [2024-06-04 14:59:28,426 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 50 changer transitions 0/571 dead transitions. [2024-06-04 14:59:28,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 571 transitions, 7216 flow [2024-06-04 14:59:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:59:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:59:28,427 INFO L175 Difference]: Start difference. First operand has 434 places, 550 transitions, 5988 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:59:28,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 571 transitions, 7216 flow [2024-06-04 14:59:38,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 571 transitions, 7092 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:38,905 INFO L231 Difference]: Finished difference. Result has 436 places, 553 transitions, 6026 flow [2024-06-04 14:59:38,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6026, PETRI_PLACES=436, PETRI_TRANSITIONS=553} [2024-06-04 14:59:38,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 14:59:38,906 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 553 transitions, 6026 flow [2024-06-04 14:59:38,906 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) [2024-06-04 14:59:38,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:38,906 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] [2024-06-04 14:59:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 14:59:38,906 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)] === [2024-06-04 14:59:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1751524680, now seen corresponding path program 3 times [2024-06-04 14:59:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:38,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229919925] [2024-06-04 14:59:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229919925] [2024-06-04 14:59:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229919925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399726356] [2024-06-04 14:59:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:39,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:59:39,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 553 transitions, 6026 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) [2024-06-04 14:59:39,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:39,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:59:39,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:41,417 INFO L124 PetriNetUnfolderBase]: 3742/5878 cut-off events. [2024-06-04 14:59:41,417 INFO L125 PetriNetUnfolderBase]: For 1790960/1790960 co-relation queries the response was YES. [2024-06-04 14:59:41,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63778 conditions, 5878 events. 3742/5878 cut-off events. For 1790960/1790960 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35276 event pairs, 682 based on Foata normal form. 4/5882 useless extension candidates. Maximal degree in co-relation 63572. Up to 5633 conditions per place. [2024-06-04 14:59:41,518 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 532 selfloop transitions, 42 changer transitions 0/578 dead transitions. [2024-06-04 14:59:41,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 578 transitions, 7332 flow [2024-06-04 14:59:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:59:41,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:59:41,518 INFO L175 Difference]: Start difference. First operand has 436 places, 553 transitions, 6026 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:59:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 578 transitions, 7332 flow [2024-06-04 14:59:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 578 transitions, 7198 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:52,175 INFO L231 Difference]: Finished difference. Result has 438 places, 556 transitions, 6058 flow [2024-06-04 14:59:52,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6058, PETRI_PLACES=438, PETRI_TRANSITIONS=556} [2024-06-04 14:59:52,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 14:59:52,175 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 556 transitions, 6058 flow [2024-06-04 14:59:52,176 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) [2024-06-04 14:59:52,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:52,176 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] [2024-06-04 14:59:52,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 14:59:52,176 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)] === [2024-06-04 14:59:52,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1740679547, now seen corresponding path program 5 times [2024-06-04 14:59:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637045957] [2024-06-04 14:59:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:52,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:53,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:53,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637045957] [2024-06-04 14:59:53,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637045957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:53,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788463371] [2024-06-04 14:59:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:53,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:53,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:59:53,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 556 transitions, 6058 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) [2024-06-04 14:59:53,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:59:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:54,764 INFO L124 PetriNetUnfolderBase]: 3747/5887 cut-off events. [2024-06-04 14:59:54,764 INFO L125 PetriNetUnfolderBase]: For 1781504/1781504 co-relation queries the response was YES. [2024-06-04 14:59:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64015 conditions, 5887 events. 3747/5887 cut-off events. For 1781504/1781504 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35353 event pairs, 687 based on Foata normal form. 1/5888 useless extension candidates. Maximal degree in co-relation 63808. Up to 5647 conditions per place. [2024-06-04 14:59:54,870 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 49 changer transitions 0/577 dead transitions. [2024-06-04 14:59:54,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 577 transitions, 7304 flow [2024-06-04 14:59:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:59:54,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:59:54,871 INFO L175 Difference]: Start difference. First operand has 438 places, 556 transitions, 6058 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:59:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 577 transitions, 7304 flow [2024-06-04 15:00:05,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 577 transitions, 7172 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:05,076 INFO L231 Difference]: Finished difference. Result has 440 places, 559 transitions, 6092 flow [2024-06-04 15:00:05,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6092, PETRI_PLACES=440, PETRI_TRANSITIONS=559} [2024-06-04 15:00:05,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 15:00:05,076 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 559 transitions, 6092 flow [2024-06-04 15:00:05,076 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) [2024-06-04 15:00:05,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:05,076 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] [2024-06-04 15:00:05,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 15:00:05,076 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)] === [2024-06-04 15:00:05,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -111361521, now seen corresponding path program 4 times [2024-06-04 15:00:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831085463] [2024-06-04 15:00:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:06,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831085463] [2024-06-04 15:00:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831085463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:06,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:06,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206527978] [2024-06-04 15:00:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:06,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:06,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:06,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 559 transitions, 6092 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) [2024-06-04 15:00:06,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:06,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:06,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:07,737 INFO L124 PetriNetUnfolderBase]: 3752/5894 cut-off events. [2024-06-04 15:00:07,737 INFO L125 PetriNetUnfolderBase]: For 1803393/1803393 co-relation queries the response was YES. [2024-06-04 15:00:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64151 conditions, 5894 events. 3752/5894 cut-off events. For 1803393/1803393 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35421 event pairs, 686 based on Foata normal form. 1/5895 useless extension candidates. Maximal degree in co-relation 63943. Up to 5680 conditions per place. [2024-06-04 15:00:07,838 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 32 changer transitions 0/580 dead transitions. [2024-06-04 15:00:07,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 580 transitions, 7374 flow [2024-06-04 15:00:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:00:07,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-04 15:00:07,839 INFO L175 Difference]: Start difference. First operand has 440 places, 559 transitions, 6092 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:00:07,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 580 transitions, 7374 flow [2024-06-04 15:00:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 580 transitions, 7236 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:18,345 INFO L231 Difference]: Finished difference. Result has 442 places, 562 transitions, 6116 flow [2024-06-04 15:00:18,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5954, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6116, PETRI_PLACES=442, PETRI_TRANSITIONS=562} [2024-06-04 15:00:18,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 15:00:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 562 transitions, 6116 flow [2024-06-04 15:00:18,346 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) [2024-06-04 15:00:18,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:18,346 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] [2024-06-04 15:00:18,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 15:00:18,346 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)] === [2024-06-04 15:00:18,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 534525417, now seen corresponding path program 6 times [2024-06-04 15:00:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:18,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878250223] [2024-06-04 15:00:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:19,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878250223] [2024-06-04 15:00:19,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878250223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:19,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:19,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015302727] [2024-06-04 15:00:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:19,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:19,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:19,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 562 transitions, 6116 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) [2024-06-04 15:00:19,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:19,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:19,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:21,024 INFO L124 PetriNetUnfolderBase]: 3757/5897 cut-off events. [2024-06-04 15:00:21,024 INFO L125 PetriNetUnfolderBase]: For 1826016/1826016 co-relation queries the response was YES. [2024-06-04 15:00:21,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64310 conditions, 5897 events. 3757/5897 cut-off events. For 1826016/1826016 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 35365 event pairs, 687 based on Foata normal form. 1/5898 useless extension candidates. Maximal degree in co-relation 64101. Up to 5652 conditions per place. [2024-06-04 15:00:21,120 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 522 selfloop transitions, 57 changer transitions 0/583 dead transitions. [2024-06-04 15:00:21,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 583 transitions, 7380 flow [2024-06-04 15:00:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:00:21,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 15:00:21,121 INFO L175 Difference]: Start difference. First operand has 442 places, 562 transitions, 6116 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:00:21,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 583 transitions, 7380 flow [2024-06-04 15:00:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 583 transitions, 7246 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:33,066 INFO L231 Difference]: Finished difference. Result has 444 places, 565 transitions, 6170 flow [2024-06-04 15:00:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6170, PETRI_PLACES=444, PETRI_TRANSITIONS=565} [2024-06-04 15:00:33,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-04 15:00:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 565 transitions, 6170 flow [2024-06-04 15:00:33,066 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) [2024-06-04 15:00:33,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:33,066 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] [2024-06-04 15:00:33,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 15:00:33,066 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)] === [2024-06-04 15:00:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash 13549783, now seen corresponding path program 5 times [2024-06-04 15:00:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003535062] [2024-06-04 15:00:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:33,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:33,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003535062] [2024-06-04 15:00:33,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003535062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:33,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:33,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345038728] [2024-06-04 15:00:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:33,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:33,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:33,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 565 transitions, 6170 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) [2024-06-04 15:00:33,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:33,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:35,595 INFO L124 PetriNetUnfolderBase]: 3783/5943 cut-off events. [2024-06-04 15:00:35,595 INFO L125 PetriNetUnfolderBase]: For 1883410/1883410 co-relation queries the response was YES. [2024-06-04 15:00:35,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65179 conditions, 5943 events. 3783/5943 cut-off events. For 1883410/1883410 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35759 event pairs, 681 based on Foata normal form. 2/5945 useless extension candidates. Maximal degree in co-relation 64969. Up to 5686 conditions per place. [2024-06-04 15:00:35,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 545 selfloop transitions, 44 changer transitions 0/593 dead transitions. [2024-06-04 15:00:35,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 593 transitions, 7914 flow [2024-06-04 15:00:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:00:35,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:00:35,700 INFO L175 Difference]: Start difference. First operand has 444 places, 565 transitions, 6170 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:00:35,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 593 transitions, 7914 flow [2024-06-04 15:00:47,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 593 transitions, 7754 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:47,210 INFO L231 Difference]: Finished difference. Result has 446 places, 571 transitions, 6282 flow [2024-06-04 15:00:47,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6010, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6282, PETRI_PLACES=446, PETRI_TRANSITIONS=571} [2024-06-04 15:00:47,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-04 15:00:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 571 transitions, 6282 flow [2024-06-04 15:00:47,211 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) [2024-06-04 15:00:47,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:47,211 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] [2024-06-04 15:00:47,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 15:00:47,211 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)] === [2024-06-04 15:00:47,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 534681130, now seen corresponding path program 4 times [2024-06-04 15:00:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900879314] [2024-06-04 15:00:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900879314] [2024-06-04 15:00:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900879314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:48,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222236910] [2024-06-04 15:00:48,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:48,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 571 transitions, 6282 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) [2024-06-04 15:00:48,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:48,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:48,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:49,755 INFO L124 PetriNetUnfolderBase]: 3803/5969 cut-off events. [2024-06-04 15:00:49,755 INFO L125 PetriNetUnfolderBase]: For 1931491/1931491 co-relation queries the response was YES. [2024-06-04 15:00:49,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65562 conditions, 5969 events. 3803/5969 cut-off events. For 1931491/1931491 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35931 event pairs, 685 based on Foata normal form. 4/5973 useless extension candidates. Maximal degree in co-relation 65351. Up to 5688 conditions per place. [2024-06-04 15:00:49,864 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 544 selfloop transitions, 49 changer transitions 0/597 dead transitions. [2024-06-04 15:00:49,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 597 transitions, 7648 flow [2024-06-04 15:00:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:00:49,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 15:00:49,865 INFO L175 Difference]: Start difference. First operand has 446 places, 571 transitions, 6282 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:00:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 597 transitions, 7648 flow [2024-06-04 15:01:00,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 597 transitions, 7526 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:00,982 INFO L231 Difference]: Finished difference. Result has 450 places, 574 transitions, 6346 flow [2024-06-04 15:01:00,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6346, PETRI_PLACES=450, PETRI_TRANSITIONS=574} [2024-06-04 15:01:00,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-04 15:01:00,983 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 574 transitions, 6346 flow [2024-06-04 15:01:00,983 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) [2024-06-04 15:01:00,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:00,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 15:01:00,983 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)] === [2024-06-04 15:01:00,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash 13544048, now seen corresponding path program 3 times [2024-06-04 15:01:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:00,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178948668] [2024-06-04 15:01:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178948668] [2024-06-04 15:01:01,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178948668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:01,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:01,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:01,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225552857] [2024-06-04 15:01:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:01,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:01,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:02,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 574 transitions, 6346 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) [2024-06-04 15:01:02,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:02,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:02,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:03,695 INFO L124 PetriNetUnfolderBase]: 3813/5981 cut-off events. [2024-06-04 15:01:03,695 INFO L125 PetriNetUnfolderBase]: For 1932297/1932297 co-relation queries the response was YES. [2024-06-04 15:01:03,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66019 conditions, 5981 events. 3813/5981 cut-off events. For 1932297/1932297 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35940 event pairs, 687 based on Foata normal form. 2/5983 useless extension candidates. Maximal degree in co-relation 65806. Up to 5775 conditions per place. [2024-06-04 15:01:03,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 568 selfloop transitions, 26 changer transitions 0/598 dead transitions. [2024-06-04 15:01:03,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 598 transitions, 7760 flow [2024-06-04 15:01:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:01:03,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-04 15:01:03,803 INFO L175 Difference]: Start difference. First operand has 450 places, 574 transitions, 6346 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:01:03,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 598 transitions, 7760 flow [2024-06-04 15:01:14,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 598 transitions, 7608 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:14,125 INFO L231 Difference]: Finished difference. Result has 452 places, 578 transitions, 6411 flow [2024-06-04 15:01:14,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6411, PETRI_PLACES=452, PETRI_TRANSITIONS=578} [2024-06-04 15:01:14,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-04 15:01:14,125 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 578 transitions, 6411 flow [2024-06-04 15:01:14,125 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) [2024-06-04 15:01:14,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:14,125 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] [2024-06-04 15:01:14,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 15:01:14,126 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)] === [2024-06-04 15:01:14,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash 13544203, now seen corresponding path program 6 times [2024-06-04 15:01:14,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:14,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111329032] [2024-06-04 15:01:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:14,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111329032] [2024-06-04 15:01:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111329032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621291661] [2024-06-04 15:01:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:14,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:14,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 578 transitions, 6411 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) [2024-06-04 15:01:14,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:14,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:14,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:16,747 INFO L124 PetriNetUnfolderBase]: 3807/5971 cut-off events. [2024-06-04 15:01:16,748 INFO L125 PetriNetUnfolderBase]: For 1934673/1934673 co-relation queries the response was YES. [2024-06-04 15:01:16,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66281 conditions, 5971 events. 3807/5971 cut-off events. For 1934673/1934673 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35810 event pairs, 683 based on Foata normal form. 2/5973 useless extension candidates. Maximal degree in co-relation 66067. Up to 5723 conditions per place. [2024-06-04 15:01:16,844 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 550 selfloop transitions, 45 changer transitions 0/599 dead transitions. [2024-06-04 15:01:16,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 599 transitions, 7699 flow [2024-06-04 15:01:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:01:16,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 15:01:16,845 INFO L175 Difference]: Start difference. First operand has 452 places, 578 transitions, 6411 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:01:16,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 599 transitions, 7699 flow [2024-06-04 15:01:26,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 599 transitions, 7454 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:26,105 INFO L231 Difference]: Finished difference. Result has 454 places, 578 transitions, 6262 flow [2024-06-04 15:01:26,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6166, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6262, PETRI_PLACES=454, PETRI_TRANSITIONS=578} [2024-06-04 15:01:26,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-04 15:01:26,106 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 578 transitions, 6262 flow [2024-06-04 15:01:26,106 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) [2024-06-04 15:01:26,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:26,106 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] [2024-06-04 15:01:26,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 15:01:26,106 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)] === [2024-06-04 15:01:26,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1751801510, now seen corresponding path program 1 times [2024-06-04 15:01:26,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:26,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625496034] [2024-06-04 15:01:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:26,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:27,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:27,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625496034] [2024-06-04 15:01:27,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625496034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:27,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:27,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897022713] [2024-06-04 15:01:27,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:27,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:27,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 578 transitions, 6262 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:27,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:27,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:27,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:29,006 INFO L124 PetriNetUnfolderBase]: 3851/6039 cut-off events. [2024-06-04 15:01:29,006 INFO L125 PetriNetUnfolderBase]: For 2074566/2074566 co-relation queries the response was YES. [2024-06-04 15:01:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66789 conditions, 6039 events. 3851/6039 cut-off events. For 2074566/2074566 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36280 event pairs, 703 based on Foata normal form. 12/6051 useless extension candidates. Maximal degree in co-relation 66574. Up to 5676 conditions per place. [2024-06-04 15:01:29,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 63 changer transitions 0/607 dead transitions. [2024-06-04 15:01:29,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 607 transitions, 7694 flow [2024-06-04 15:01:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:01:29,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:01:29,122 INFO L175 Difference]: Start difference. First operand has 454 places, 578 transitions, 6262 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:01:29,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 607 transitions, 7694 flow [2024-06-04 15:01:39,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 607 transitions, 7596 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:39,729 INFO L231 Difference]: Finished difference. Result has 455 places, 579 transitions, 6321 flow [2024-06-04 15:01:39,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6321, PETRI_PLACES=455, PETRI_TRANSITIONS=579} [2024-06-04 15:01:39,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-04 15:01:39,730 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 579 transitions, 6321 flow [2024-06-04 15:01:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:39,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:39,730 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] [2024-06-04 15:01:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 15:01:39,730 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)] === [2024-06-04 15:01:39,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash -198353801, now seen corresponding path program 7 times [2024-06-04 15:01:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899252563] [2024-06-04 15:01:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:40,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899252563] [2024-06-04 15:01:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899252563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:40,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753270463] [2024-06-04 15:01:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:40,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:40,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 579 transitions, 6321 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) [2024-06-04 15:01:40,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:40,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:40,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:42,744 INFO L124 PetriNetUnfolderBase]: 3859/6048 cut-off events. [2024-06-04 15:01:42,744 INFO L125 PetriNetUnfolderBase]: For 1982793/1982793 co-relation queries the response was YES. [2024-06-04 15:01:42,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67141 conditions, 6048 events. 3859/6048 cut-off events. For 1982793/1982793 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36321 event pairs, 719 based on Foata normal form. 2/6049 useless extension candidates. Maximal degree in co-relation 66925. Up to 5808 conditions per place. [2024-06-04 15:01:42,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 51 changer transitions 0/594 dead transitions. [2024-06-04 15:01:42,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 594 transitions, 7565 flow [2024-06-04 15:01:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:01:42,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-04 15:01:42,837 INFO L175 Difference]: Start difference. First operand has 455 places, 579 transitions, 6321 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:01:42,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 594 transitions, 7565 flow [2024-06-04 15:01:53,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 594 transitions, 7430 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:53,934 INFO L231 Difference]: Finished difference. Result has 457 places, 581 transitions, 6331 flow [2024-06-04 15:01:53,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6331, PETRI_PLACES=457, PETRI_TRANSITIONS=581} [2024-06-04 15:01:53,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-04 15:01:53,934 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 581 transitions, 6331 flow [2024-06-04 15:01:53,934 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) [2024-06-04 15:01:53,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:53,934 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] [2024-06-04 15:01:53,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 15:01:53,934 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)] === [2024-06-04 15:01:53,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash -349872321, now seen corresponding path program 8 times [2024-06-04 15:01:53,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:53,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485474868] [2024-06-04 15:01:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:53,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:54,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:54,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485474868] [2024-06-04 15:01:54,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485474868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:54,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:54,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:54,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097582765] [2024-06-04 15:01:54,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:55,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:01:55,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 581 transitions, 6331 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) [2024-06-04 15:01:55,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:55,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:01:55,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:56,799 INFO L124 PetriNetUnfolderBase]: 3872/6073 cut-off events. [2024-06-04 15:01:56,799 INFO L125 PetriNetUnfolderBase]: For 2005500/2005500 co-relation queries the response was YES. [2024-06-04 15:01:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67259 conditions, 6073 events. 3872/6073 cut-off events. For 2005500/2005500 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36564 event pairs, 719 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 67042. Up to 5826 conditions per place. [2024-06-04 15:01:56,907 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 543 selfloop transitions, 52 changer transitions 0/599 dead transitions. [2024-06-04 15:01:56,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 599 transitions, 7629 flow [2024-06-04 15:01:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 15:01:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-04 15:01:56,908 INFO L175 Difference]: Start difference. First operand has 457 places, 581 transitions, 6331 flow. Second operand 9 states and 146 transitions. [2024-06-04 15:01:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 599 transitions, 7629 flow [2024-06-04 15:02:10,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 599 transitions, 7496 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:10,064 INFO L231 Difference]: Finished difference. Result has 459 places, 586 transitions, 6389 flow [2024-06-04 15:02:10,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6204, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6389, PETRI_PLACES=459, PETRI_TRANSITIONS=586} [2024-06-04 15:02:10,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-04 15:02:10,064 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 586 transitions, 6389 flow [2024-06-04 15:02:10,064 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) [2024-06-04 15:02:10,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:10,064 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] [2024-06-04 15:02:10,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 15:02:10,064 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)] === [2024-06-04 15:02:10,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash -339147561, now seen corresponding path program 9 times [2024-06-04 15:02:10,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:10,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439404124] [2024-06-04 15:02:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:10,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439404124] [2024-06-04 15:02:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439404124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:11,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:11,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:11,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099218187] [2024-06-04 15:02:11,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:11,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:02:11,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 586 transitions, 6389 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) [2024-06-04 15:02:11,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:11,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:02:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:13,208 INFO L124 PetriNetUnfolderBase]: 3880/6083 cut-off events. [2024-06-04 15:02:13,208 INFO L125 PetriNetUnfolderBase]: For 2030229/2030229 co-relation queries the response was YES. [2024-06-04 15:02:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67477 conditions, 6083 events. 3880/6083 cut-off events. For 2030229/2030229 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36577 event pairs, 717 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 67259. Up to 5838 conditions per place. [2024-06-04 15:02:13,305 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 51 changer transitions 0/601 dead transitions. [2024-06-04 15:02:13,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 601 transitions, 7655 flow [2024-06-04 15:02:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:02:13,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:02:13,306 INFO L175 Difference]: Start difference. First operand has 459 places, 586 transitions, 6389 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:02:13,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 601 transitions, 7655 flow [2024-06-04 15:02:26,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 601 transitions, 7512 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:26,774 INFO L231 Difference]: Finished difference. Result has 462 places, 588 transitions, 6399 flow [2024-06-04 15:02:26,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6399, PETRI_PLACES=462, PETRI_TRANSITIONS=588} [2024-06-04 15:02:26,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 15:02:26,775 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 588 transitions, 6399 flow [2024-06-04 15:02:26,775 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) [2024-06-04 15:02:26,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:26,775 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] [2024-06-04 15:02:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 15:02:26,775 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)] === [2024-06-04 15:02:26,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -350198751, now seen corresponding path program 10 times [2024-06-04 15:02:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653880553] [2024-06-04 15:02:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:27,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653880553] [2024-06-04 15:02:27,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653880553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:27,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:27,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499556901] [2024-06-04 15:02:27,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:27,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:02:27,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 588 transitions, 6399 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) [2024-06-04 15:02:27,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:27,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:02:27,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:29,616 INFO L124 PetriNetUnfolderBase]: 3875/6072 cut-off events. [2024-06-04 15:02:29,616 INFO L125 PetriNetUnfolderBase]: For 2029072/2029072 co-relation queries the response was YES. [2024-06-04 15:02:29,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67205 conditions, 6072 events. 3875/6072 cut-off events. For 2029072/2029072 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36485 event pairs, 714 based on Foata normal form. 2/6073 useless extension candidates. Maximal degree in co-relation 66986. Up to 5805 conditions per place. [2024-06-04 15:02:29,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 59 changer transitions 0/602 dead transitions. [2024-06-04 15:02:29,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 602 transitions, 7627 flow [2024-06-04 15:02:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:02:29,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:02:29,728 INFO L175 Difference]: Start difference. First operand has 462 places, 588 transitions, 6399 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:02:29,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 602 transitions, 7627 flow [2024-06-04 15:02:43,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 602 transitions, 7466 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 15:02:43,391 INFO L231 Difference]: Finished difference. Result has 463 places, 588 transitions, 6361 flow [2024-06-04 15:02:43,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6361, PETRI_PLACES=463, PETRI_TRANSITIONS=588} [2024-06-04 15:02:43,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-04 15:02:43,391 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 588 transitions, 6361 flow [2024-06-04 15:02:43,391 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) [2024-06-04 15:02:43,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:43,391 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] [2024-06-04 15:02:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 15:02:43,391 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)] === [2024-06-04 15:02:43,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1992064264, now seen corresponding path program 4 times [2024-06-04 15:02:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876712741] [2024-06-04 15:02:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:44,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876712741] [2024-06-04 15:02:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876712741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:44,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:44,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:44,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795006629] [2024-06-04 15:02:44,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:44,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:44,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:02:44,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 588 transitions, 6361 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) [2024-06-04 15:02:44,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:02:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:46,322 INFO L124 PetriNetUnfolderBase]: 3896/6104 cut-off events. [2024-06-04 15:02:46,322 INFO L125 PetriNetUnfolderBase]: For 2067533/2067537 co-relation queries the response was YES. [2024-06-04 15:02:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68066 conditions, 6104 events. 3896/6104 cut-off events. For 2067533/2067537 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36675 event pairs, 709 based on Foata normal form. 5/6109 useless extension candidates. Maximal degree in co-relation 67846. Up to 5774 conditions per place. [2024-06-04 15:02:46,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 567 selfloop transitions, 66 changer transitions 0/637 dead transitions. [2024-06-04 15:02:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 637 transitions, 8725 flow [2024-06-04 15:02:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:02:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:02:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:02:46,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-04 15:02:46,423 INFO L175 Difference]: Start difference. First operand has 463 places, 588 transitions, 6361 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:02:46,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 637 transitions, 8725 flow [2024-06-04 15:02:58,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 637 transitions, 8462 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 15:02:58,796 INFO L231 Difference]: Finished difference. Result has 465 places, 609 transitions, 6696 flow [2024-06-04 15:02:58,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6696, PETRI_PLACES=465, PETRI_TRANSITIONS=609} [2024-06-04 15:02:58,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-04 15:02:58,797 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 609 transitions, 6696 flow [2024-06-04 15:02:58,797 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) [2024-06-04 15:02:58,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:58,797 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] [2024-06-04 15:02:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 15:02:58,797 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)] === [2024-06-04 15:02:58,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1992450214, now seen corresponding path program 5 times [2024-06-04 15:02:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143778769] [2024-06-04 15:02:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:59,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:59,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143778769] [2024-06-04 15:02:59,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143778769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:59,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:59,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002645696] [2024-06-04 15:02:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:59,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:59,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:02:59,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 609 transitions, 6696 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) [2024-06-04 15:02:59,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:59,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:02:59,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:01,716 INFO L124 PetriNetUnfolderBase]: 3935/6160 cut-off events. [2024-06-04 15:03:01,716 INFO L125 PetriNetUnfolderBase]: For 2139714/2139718 co-relation queries the response was YES. [2024-06-04 15:03:01,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69873 conditions, 6160 events. 3935/6160 cut-off events. For 2139714/2139718 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 37061 event pairs, 713 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 69652. Up to 5670 conditions per place. [2024-06-04 15:03:01,835 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 130 changer transitions 0/651 dead transitions. [2024-06-04 15:03:01,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 651 transitions, 9232 flow [2024-06-04 15:03:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:03:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:03:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 15:03:01,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:03:01,836 INFO L175 Difference]: Start difference. First operand has 465 places, 609 transitions, 6696 flow. Second operand 10 states and 175 transitions. [2024-06-04 15:03:01,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 651 transitions, 9232 flow [2024-06-04 15:03:13,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 651 transitions, 8996 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:13,893 INFO L231 Difference]: Finished difference. Result has 471 places, 627 transitions, 7276 flow [2024-06-04 15:03:13,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7276, PETRI_PLACES=471, PETRI_TRANSITIONS=627} [2024-06-04 15:03:13,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-04 15:03:13,893 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 627 transitions, 7276 flow [2024-06-04 15:03:13,893 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) [2024-06-04 15:03:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:13,893 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] [2024-06-04 15:03:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 15:03:13,894 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)] === [2024-06-04 15:03:13,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1045446490, now seen corresponding path program 6 times [2024-06-04 15:03:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:13,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066347136] [2024-06-04 15:03:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066347136] [2024-06-04 15:03:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066347136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:14,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192656120] [2024-06-04 15:03:14,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:15,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:03:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 627 transitions, 7276 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) [2024-06-04 15:03:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:03:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:17,004 INFO L124 PetriNetUnfolderBase]: 3955/6188 cut-off events. [2024-06-04 15:03:17,005 INFO L125 PetriNetUnfolderBase]: For 2214957/2214961 co-relation queries the response was YES. [2024-06-04 15:03:17,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71158 conditions, 6188 events. 3955/6188 cut-off events. For 2214957/2214961 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 37215 event pairs, 713 based on Foata normal form. 8/6196 useless extension candidates. Maximal degree in co-relation 70936. Up to 5834 conditions per place. [2024-06-04 15:03:17,109 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 594 selfloop transitions, 67 changer transitions 0/665 dead transitions. [2024-06-04 15:03:17,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 665 transitions, 9159 flow [2024-06-04 15:03:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:03:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:03:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:03:17,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-04 15:03:17,110 INFO L175 Difference]: Start difference. First operand has 471 places, 627 transitions, 7276 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:03:17,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 665 transitions, 9159 flow [2024-06-04 15:03:32,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 665 transitions, 8814 flow, removed 132 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:32,614 INFO L231 Difference]: Finished difference. Result has 476 places, 639 transitions, 7602 flow [2024-06-04 15:03:32,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7602, PETRI_PLACES=476, PETRI_TRANSITIONS=639} [2024-06-04 15:03:32,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 15:03:32,615 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 639 transitions, 7602 flow [2024-06-04 15:03:32,615 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) [2024-06-04 15:03:32,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:32,615 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] [2024-06-04 15:03:32,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 15:03:32,615 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)] === [2024-06-04 15:03:32,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1724521864, now seen corresponding path program 7 times [2024-06-04 15:03:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:32,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860212208] [2024-06-04 15:03:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15